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PE-1168A-78 - , ~SPCK'ANE i;U:IIVI Y HEALTH DISTRIC"I ~ f;:".:rvYt ice Memorandum DATE: September 8, 1988 uz/ T0: Subdivision Administrator, Spokane County FROM: Steven P. Holderby,~R.S. - Environmental Health Division SUBJECT: PE-1168E-78 (Midilome'5th Addition) - Change of Conditions After reviewing the change of conditions to the above listed plat, the Spokane County Health District has no interest in this matter. rAN& E C E I VEI) SEP 9 1988 SPOKANE CpUNT1, PLANNING DEPARTMENT , 0625E/bls ~ MEMO RAN DUM _ • T0: Spokane County Pl anni ng - Prel iminary Plats FROM: Spokane County Uti 1 i ti es I VE k" oaTE : scr S UB J ECT :'I'YL! C.o/Xe, 5~- .41.P / 174~✓ S6'OCSP'~ COUNTY ~ P'~A~~~9~~~~ A~~'~ Recomnendations are as Circled: (1) Pursuant to the Board of County Commissioners Resolution No. 80-0418, the . use of on-site sewer disposal systems is hereby authorized. This authoriza- tion i s condi tioned on compl i ance wi th al 1 rul es and regulations of the Spokane County Health District and is further conditioned and subject to speci fi c appl i cati on approval and issuance of permi ts by the Heal th Distri ct. (2) The dedication shall state "The owner(s) or Successor(s) in interest agree to authori ze the County to pl ace the i r name(s) on a peti ti on for the formati on of a ULID by petition method pursuant to RCW 36.94 which the petition Includes the Owner(s) property and further not to object by the signing of a protest petition against the formation of a ULID by resolution method pursuant to RCW Chapter 36.94 which includes the Owner(s) property. PROVIDED, this condition shall not prohibit the Owner(s) or Successor(s) from objection to any assess- ment(s) on the property as a result of improvements cal ]ed for in conjunction wi th the formation of a ULI D by ei ther petition or resol ution method under R(W Chapter 36.94." (3) Any water service for this project shall be provided in accordance with the Coordinated Water System Plan for Spokane County, as amended. (4) There are no recommendations concerning the method of sewage disposal as the project is outside of the 201 sewer study area. (5) Water servi ce as approved by the Spokane County Heal th Di stri ct and/or the Wash ington State Department of Soci al and Heal th Servi ces . (6) The dedication shall state: "Each dwelling unit shall be double plumbed for connection to future"area-wide collection systems." (7) A dry sewer connection to the future area-wide Sewerage System is V be constructed. Plans and specifications for the dry sewer connection are to be reviewed and approved by the Utilities Department. (8) Located within the Critical Water Supply Service Area but not within apy purveyor's di stri ct. May be servi ced by an i ndi vidual wel l o~w.red and oper- ated by lot owner. (9) Any: sewerage service for '~this project shall be provided in accordance wi th the t Comprehensi ve Wastewater Management Plan for Spokane County, as amended. 0 , t~ p ~ W`C ~ ~ w~ ~ST P~- i~vl ~ ~ ~R t~ v~ ~ ~ ~-~S ~ s~~ _ ~ • ~ 0 F'F T Ca ~ F T i -i E C 0 i.; N ' l" Y k: N G; E h SPC)K.ANEE" C:(Di..lNT`r' 9 WASHT N. .:tN seP temt)F' i'` q ~ geE; p' C7 : 1ant 7 i. n y Dep1,a rf_ men f_ FROiI o Ca C:i l.l f'1 ty Er i g?ncy epis Depar"Lr i ient aU X'~ ~:Y E C: °9° o Ro,.-Ad Con ci :i t ion 3 Y cr r P:1 a-t_ Narn e: i'll: DILtl iviE 51"H AI') D7:"f' C~ ~~l~.~mF )c.~ r ° 1'~: 11.6.8. ~Ihcy„f= o1 1. a wi nq C: ca ,-ida. ti cJns Ap cjlvto, F' Iat Lin dei- ort si der'a ta. on . ~ ~1° t~~ t c.~ o r~ ~ c~ i. tioi-~ :l G~ p~a r z~ va:l a~~ i~ i p~ r~ •t !a y•k_ Ilc f r i t y n~~ i n E~ Fa r is g i. v~ suL°a ject t. o c.! ec:i i c:: afi. ion of I"-i i ght-of-W C-t yzio-i d aUpr ova1. r f "Lhe r oad sy:_► t_ ~m as i nci i. cai_ c d a n the 1--r r 1:i ma. riar•y p]. t. o4' i~ ecoi, c1. E: ,~w..~. 'T~ ia-l` p1 aris; qpr0 4' i1es 4~n c;i c: ross. sec_ ti cans; s desi gn et:3 tO COLtn t y s t ary d ar ds si-ic, wii-ig pr- opc~ se-ci street c_ c; nterx?. ne and c:: L.x I, b y r,;---tr~ er:3 r~ ~ SLtb m it•LL-ci to t. he G G Ltn-Ly Lngi i, cer f oe, zt p p rca vaI pr-ior to C_ O f'1 stf' l.! CtiCi n a nr.1; « r the fi 1 i ri g of a fi nal p:l 4^d ty i, o~.~ r_f p1 z-ir~ s to be pr ep,1 r p-d u ridei- th~.~ dir° c~ ction of li c:. er-i c:a d 1=' rc, fessi or3 a:l t, iva. 1 L ng i rleer. 3 E T h<~ t drai ri aga p:l ans L-tr-ic:f c1 efi:, i y ri cR.:L c U1 .-It:i ons t_; how i ri g t he a7. ign mert t o f' dr t:z inag e, bca SL.t bmitf.. c.3 e i tel thE, C e tlUntyEn gi neer for~ appi- o va:k !_r iy i o r to c ot-isfi_ r t_t cta. o ii an d!r~ r the 4' ilin y c; f 'r fl Ea fa. r -jzi:L pl. ai_ . D rt a:i na g e Fal.ar~s tc, la(--- pr~.Wp~~rad ur-ic:ier the d:ir•ec_tican of a licensed (='rcafesaional C:i vil [=:ngineer o L, ti: L!• - - Th.e; i:. ti-, e rc~.~ U1Ektions ca l' the Nr:c fi. :i ce, nal F' 1 ca o d x nSUr• n r e Pr• ogr• am he , a I:a {a ei, v eds:i nce, •t h Lm prt:.~ j--)used plat i~; affE' ter1 by zi F 1. ood H r:~ zard Zor iea A devej. oprri e::,`7 t. pe:.~ rrn i~ ~-;h°r a:I. l bc- c0t aif"i C' d fr° c:, rr iti'le C oLa n ty f.= ngineeri f:j efc.y res cn nytrUCr. i v n or C) C? Vell.) pffw:? nt L1eCl1 Pl 'ri wi•t !7 ii-I ariyare~.=~ of sro ec. -I'a1 f1 ca ca ci hazar• c:i ( ref c r c-erm ce Spok-ane C ca Un•t. y u r dirE i:--in c~ ~el-0;^ h)e ~ ~ C- 5- GOOStruc_ tion w:i tha. ri t i i PrOPcr _a ed f3LIbli c _s trec ts 07 ei easem en ±s sI-i l. 1 ka e pc::-r• I' ca r mvd Un der the c} ir~.~ c•L sup~.J r v:i s:i on ca f~.-~ :l i cen a.:; eci e n g i n ece i~ ~S LR 1, vE- y c) r q IAI ho s h a 1:1. f Lk r ri as h -L E-, e C raU 1-1 •t. y Cn y i ri r:}L--, r w i. t I i " A s B ui 1. -L " p 1. ri Pi s <vc r-i d Zx c c~ r-- t i#' j. c_ Z-1- 'r. 2 i n w ri t. 7 ri g t ha t a 11 i m p r, c ve me n t s we 19 e :i iist~.z I 1. eiI 't. o th~.~ 1 i r~ ~s an d grad~s show ri oti the p prov ed C OI`l {wl i: rUc_ -L:i on pJaris ~:tnd th~.a t Gi l:I. di atUrbec:l rn 0r-It..t r,~!er~ LLS; hav e ha ec n rep1zt c eecl . E 6 n! o constf, u c:#_ :i on w01, l-:: is •k o bc--z pr~ r~ formed wi'r F-ii e7 t tie e>: a. st i n g oi~ pr;-~ pnr; ed Pu bla. c Ri ght-ra f-~JayUnt. i1 4..~ pca r mi•t.. has heen z<.i-i> st..ted bytt-le Cc 1LAi-Ity Engi i-iE er. Al. Iwork i. s suI--r, j,--c t to i. nspert:i on andap pr ov a:i. by t hc:~ CcaLtr-i•Ly Er ig:i r-ieer o , s ~ E 7--• A1 l. cont t r uC-~a. c~ r°~ ~v f. h:~. r~ t. i~c. e.". c ~ ~ : .i. ~ ti.:d r; r~ c~ r W r e~ pos. a e# F ~a 1 i c I~ i G!-~ ~~.--c~;~'-Way , :i s t n fa e c ra ni p 7. e •t e- ci p r i ea r• t f i 7. i ng Uh e f j. s i a J. p J. a t o ra b o ri d i ~i t h c_ ,RNIra Unt Ea s timaf.. ed by t i~icz-, Cca Ur-It y Er-, giri eer• t o c ov er tI i E' c: ost U 4' C017 1-:3-trUC-t:i on ca f' i mprovemer ilLsti c; onstr i.t cM ti. o n c_ c rtif x i: ati o`i q"As t_tz 1. t" pl<.tnJ and m cm ri Lti entirig tt7 str e~d t c -c-n tc r :l ir~ ~ ~ sha1 1 be fa 1 ec:l wa. t . h th e Ccaurity Engir~eenr. . ~ !~t , ~rv n o ~C~• ` ~ ' .1 _ p C.~g~ ~ ~ : :i. J. 1J hn-L ap.:, rup€ • izite pr• c; v isior i be m~.~ d e ti~ ~ t. the f `y 1 1 ow i. rt g d escrx ed property 1.-r s he:i. ci i n tP, ust ur i f:. i:l tti e ccanti n t_tata. on o f t hE~ str~.~et. s be cf ec1 ic Ga ted ordeeci edg A J. 4"t. . st. ~ip at. thc~< en cl s; ca r, ed y es c2 f a:I. l thztt ter m a. n ate ra ri borr~ er, tf} e p:l at bo-iundary e C '~F e. rn 17 n i, a r y C LA :L dc sac~ s z.:, re reqUir• ee6 w tien streeKt. ter- mi natcat. t I-i~.~ pLeAt k) ui-kn d<Z i- i es., ) ~ E 1 2_. T hie a:.kpp1 a. car•7 t -shoi_i 1 c:i l.3 e adv xseci tt; at a. nc{ a. v i. dual d ri veway ac cE.-:,ss i~ a-,rm i. ts re- requi rez_t pri. ca i, fi. i.~ i~~ suan c. e ofa bi..ti. :l di r•i g per m:i t for dr1 iv~t-jG,y apprQziches to ILhG? Cc:3L.uIty road sysf..efne i:.:1=; ° IJedi. ca al_ ion ea fSt_!F F*T CTEIVT RT t*3jIHT Cat=' WAY ALONG F' I hiESRi~ADSO A57'C7 '1~l~ E~:~~ hJ "f'f:l°'- L_ I~1E ClF~ t~lES fii t~ F~ Dn - P' V :t' DGo 3c:) F= ~T' . t.?F i=~ T ta I-~ ~T C)~= W~~°' ca F. kJ edication ra 4' a 60 4' tm cJ Y r i, c3 t i_~._ofkr,..--~y_fca rthe n orther 1_Y_ e<~ ~t-west r oaci w ay connect_ i on bLtween 1:)i ne,-G)~ Rc3 aci amc~ 37thoAv e. l- l-) a. sT w:i 3. 1 pc: i° mi. i~....~ thi ~.a c; a nstr ur.: "r.... i ea n_ uf sa. dc.~ w~.~ 3. k-s zi7. ono thra t ea 1 i or7 me-ri -L r ~ l E:!. 4_-° i i ~ ~ e~ re~ e~ r~ •t. ha:!. l bca ~ ~ ,-::xc c..a d i n ~ lst dec; a. c_ ata. on -i h -L no di r ec t ac ~ ess f-a e a3 i oweci f1" C.7fii 3 ots to F-T illE(.:°)' ftii:7P0. ~ F 1 6- E,"a ia tit-7 C OG.i nty r,oC-,Ld s p r ov a. ding ei i rec t ~Ac cc~ ss t o t~ p p:l at shall b~~ pi~:vc--3d anr1 curbec1 to Spokane COUnty stand..iyd s. E 1. 7µ- Tt• ~at as. l pLibli c I" oad5wa. th a. nthe p1a•i.. k:, e c.i es i gri ed ancl cons'; rUC-L ed to a~:~al::~~r~2 ~_ti~t.y ~.~•~.~nri,~r~~isa ~E :i 8-- 'T(w a't.. rca req c..t i. r•ed a:i. r.)ng 9=f 1 NES RC7 AUAND I' I~IE iqQ FZl' i-I Efw L.. Y °f ~~i I~ C~ UGF-i .~'1" I~ E~v "I' t~ 9~ ILa H RU V T Y~ lw S f 1 C:: C] s~d F' d:: '7" IC~ i~~ BETI~1EE itil '7' i-•I4AV~' !\f U[=. ~1 !V ~v , _ PIN ES RLa ADA 4 SIDE_ WAL. S) ; i HAE L L h "i' ENX'JEi[:y 1" CJ '37T F-I . AVEa .1..h.ie word "appi,ic~.~nt." shal:l ancILAcJE? the awner car• ownerts of the pi' t:J (7 E? 1~ ty, fl .l s 1-ie3. f~sa ass7. g1 is zu' i C{ l.t CCE? r'> ao1'` 5 a ~F°: ..P't-~ ~COUnt y L n ginc-e r F-s Lt s ci esi gnated T ypi c l Raaci way Sectio n nl Li mt)r= r '1'V'O,, ACC:ESS S"i'FzFaE"I" ST(-1NX~ARD stanc:.lar•cJ 4'cyr the irriprovernent of INTERIOR F, d~DW(--~;YS f.. o ri e c ra nst ruC-tec.-f witM i r i t i-ie pr upose..?d deve1 opment. "Th is w i 1 1 r"-q u i r e fi.. he :i nst~..Z 1:!. ation ca r 36 i' t. ca 4~ asphzi1 t. . °I" tiE c ons••L r- ucttior i af CLt -ha s. ng is zt1 r c) r ca q u i reda , 1 ~ F~ e p i, c~p c~ seci :l a~t st~t 1. e mpi' t~ ~1 t't~ t. c~ 'Lti c~ s~~~.~ rz d r d J e~. f r° t h i r~ Spak~.ane CaLt-tty Board caf L::ommi.F~sioners f=~~soluttion Non 8c)--1592", Ets a.3 fTl c ndedw 4N rl iCh esUibl]. shCa a t' t'? t jUlc`eit:t CD P i S f'Q(` i` oad?~ , a(J p C` C3 aC' fl esq dr~.~ a, nL-t ge nd 3*r= c, s i r i ri L w co r ist rLi ction. ~ E. hr C: ~.t ri°t. y Engi. n epr i-i<:.~a s., e: : ain i n c d tF-d a. s, c.i 4•~ v e'Iopsn (---3n fi. pr opca s~.~ :1 and ha s 6eter,riun~,~ d that the a. mpac-i:. ra 4 fi.. l~~ ~s prow e~ sa:i upon thc~ e:: isti n g C"ca Ltn t y S=~ uad S,y~ ster~ war ran~s the dedi cjAi_ ? t3 n o f' addita. a nai Ra. y ht-- 0 4' -WFayand rr_y~::~dwrty amprovements t--ic-reir-~ speci4':ied. • i~: .I. ~ i". ~ ' pe.lgC-? e E4 - . ' < < i Pj iR`L r.i r d c~ vc: 1 c~ pr rn e n t F7 r ca ~ (z) s a- ucw a t E-:? ci wi ti-i F. n dr ai n at,; e I~ ~.-i s :i n i(:° h hi.:is been a. dentific-ad 'C' y t. lh!~:? S~~)cja:: anc~~ Ca La r-i-i.. y Enqi n r-~ er s C:l ff:i. t~ e as 1 'hZ-tv i ng st. or uib-4<:c lLe:• ru~ oliff probI ems. a a. ric e tha. <.a p1 ,Fa•r:. o r ci ve:i. oF:) ('f it-a nt propc sa:d. a s zif f; ~ cted by ur i. s con•Li, it, Lt to^ tca stor mw ater f lows:, prop c:a rty ownca i, s si-: ou:l d partic:i patc-m a. nttie p1. n ni. r i g an d implof i t e=Pl ti,-,:1 t7 oY 0 of ZR fUture ba~:;inwa. ci e st. or r~~ water manR:t CJ c~.a mori t, sy.sten). Th;:~ foli c.~ wivig tw, taterrient. sha:l l be p~. t..~ c ed in t!-7 e p:t at ded:i. c-'ata. ca n° 11 -i ~'i s:ti t. ~t. I C~? Q^i 13ii i"! 4:.' f' (s) C~ t" ~a l.1 f~ ct? t°, ~:s C:1 E~` (a) a. rs 7c. eres~~. ac~ r• e C) jC:) :l f d :i. i°t arl Ce~, 6.i nty ~-_)pr ou er.~ Stci i, m w<_,v%I_c-.-:r M, ~nage ment F' r Ogi, rtl nd to p ay=., !Ir h rates and ci-iargess as m`=iy be fi.;ecl thrmlgl-~ PUt~)Iic hearings fo`~ service or ol.? tai. nt~.a d by Li•i e p'l. anni ny, ca ~siy n q consi r UCt i. n c~ q~n a:i n•~:. « a. i-~ i r~ y G7 P' UpC,- I" c.l 1, of l C~f oI"f~'iifdc 1~.. i` C~7 i it~`(:7 4ar 3 J. 1'~~ 1eso~ v i cz~ ; . 4 . ~ , 4 a i ty Aci o ~f ~er i~.~:l Ro <~~1 pF~ F•~ i (J~~n~.i i.c~ ~s F' I~f L ~.a I~ I~ -~s t~l T[~~0F~ Ar -•ier :iek:l . ~ " i h e c:;i i`.. a. ne.~ i°i ghrt c) 4~ w A-y w J. dth c) 4' 50 1" 0 60-4 t„ a. s riea f c ea i-ia ~s-Leri•C. w ith t hat :Lpct c• ified in 1" P-i e Plan. 1 ri ra r der, to i mp:i. em e nt the A rtc r- a. al oac: iP~ ~-1 it is reco rui1 c:~a m-)ci ad t i-~ ~zit T_ hat a•strip of' proPer-t Y__ IC.) W_ f-t. i n dti a. cl'~~ Pi alo ri g 't I°ie P1 NES RCJAga Fre]n •t_ age be set asia. cf e i n reaer vep Th:i s pr oper t y rn,-Aybe acq Uiredby SpoR:: ane C ca u rityr• at the t.. ir~ e who-ri Arter i al T. mprov~.~ rtic.,rit.. s ar° e mac.l e •t c•j F' INEG ROFwD , ~ 9-88 HEC Findings PE-1168E-78 Page 2 iN REFERENCE TO THE ATTACHED F1NDINGS & ORDER. TNE HEARING EXAMiNER COMMITTEE pDOPTS THE FOLLOWING CON IT10NS OF APPRQVAL ATTACHED HERETO: ' PLANNING DEPARTMENT GONDITIONS: 1. That the below listed conditions of ali Departments and Agencles are binding upon the applicant, owner(s) of the property, heirs, successors or assigns. 2. The preliminary plat of recxord approval is for the property legally described in the application for this proposal. 3. That the Ftnal Ptat be designed substantfally In oonformance with the changed preliminary design as legally described and advertised. No increase of density or lot number shall occur without e new appiication submittai and approval. 4. The Spokane County Subdivision Administrator shall review any proposed Final Plat to insure oompliance with the Findings and Conditbns of Approval. j The applicent may request an Extensbn of Time by submitting a written request forty-five (45) days prior to the above expiration date. . 6. Upon filing the Ffna! Plat the zone change of the Final Plat area shall be finalized and the existing Agricultural zone classification shall be changed to R-1. 7. That a Final Ptat name be indicated before the final plat is filed; such name to be approved by the County Planning Director/Designee. 8. That appxopriate road names be indicated on the plat. 9. That appropriate utility easements be indicated on oopies of the proposed final plat. Writtten approval of said utility easements by said utility companies must be received with the submittat of the frnai plat. 10. That 3 current certificates of titie be furnished the County Ptanning Department prior to flling the flnal plat. 11. That the folbwing statement be placed In the final plat dedication: "No more than one dwetling structure be p!$ced on any Lot nor shall any bt be further subdivided for the purpose of cxeating addittonal bts, ownerships, or lwjldfng snes without first filtng a replat." The flnal plat map shall indicate by a clear dashed line, the required setbacks from all private, tract x or publlc roads. the dedication shall oontain a statement that: "Side yard and rear yand setbacks shalt be determined at the time buikiing permits ere requested. The setbacks lndicated on this subdivislon may be varjed from if proper zoning approvels are obtained." ~ . Gr "--k 'A' J ~ ! + ♦ _ ~ ~ Spokaiic County ~ w~' , • ~ De artment c~f ~3uilc~in & Safct P ~ Y p~t! ;~~'~'`:t-j~-,;._u, • JAMES L. MANSOIY, DIRECTOR TO : Spokane County Planning Department '&'V FROMDavis, Code Compliance Coordinator ~ 4.1- s / Department of Building and Safety 1~ spo 1 '2 ~ l~j 9~Qp D40 ATE : '`~ly/ ~~F 'v ~0 ~'p ~Vzr RE : F i 1 e Nu mb e r : - ~s - ~1~;Address: ~ our comments regarding the above are reflected in the marked box(es) below: Please be advised that this department sent a letter to ~ the applicant advising him to contact us regarding any applicable code requirements enforced by this department. It is our intent to make the applicant aware at the earliest possible stage of building codes which may impact their groposal such as fire hydrants/flow requirements, access roads, permit and other construction regulations. Please advise the applicant to contact this office at ❑ the earliest possible stage of design/development in order to discuss any applicable code requirements enforced by this department. The applicant will be made aware of any State Building Code Act regulation which might impact the proposal such as fire hydrants/flow requirements, access roads, and permit requirements. we have no requirements for this proposal - existing n conditions. Comments are . as follows: 00, \ TLD:pjk ~ NORTH 811 JEFFERSON • SPOh.aNE, WAS1-i1NGTON 99260•0050 0 TELEPHUNE (509) 456-5675 TC}: PE-1168-78 Midilome Subd.ivisions FROM: Nj(IIhomas G. Mosher, AICP, Scnior Planner DATE: April 24, 1990 SUBJECT: Effort to stiaighten out and redircct thc Midilomc Subdivision naining mess This file constitutes t.tie remaining preliminary plat of the Midilome Subdivisions. Mid.ilome Addition, First Addition, Second Addidon, Third Addition, Fourth Addition and Fifth Addition have been filed. As of this date Midilomc Sixth Addition has been submitted to the Planning Departmentfor finalization. All subsequent final filings should be marked on the two Midilome Subdivision summary maps as they are finalizcd, by the order in which they are filed for finalization. The subdivisions should continue in numerical sequence as Seventh Addition, Eighth Addition, etc. mo MIDILOME, INC. E. 3144 - 29th Avenue Spokane, Washington 99223 (509) 535-1264 March 16, 1988 Mr. Doug Adams Plat Administrator N. 721 Jefferson Spokane, tiJashington 99260 RE: Midilome Plat Modification Dear Mr. Adams: We request that the enclosed design modification for Midilome preliminary plat be approved. These design modifications have been drafted by C. E. Simpson Engineers. The main reason for this change is to avoid facing lots on arterial streets (Pines and 40th). We find that such lots are very difficult to sell. By increasing street frontage, we now have the remaining lots back- ing these streets. Please note that the lot sizes have somewhat increased and that the den- sity is slightly less than our original plat. We believe that the overall plat adheres to the original approval guidelines. Sincerely yours, ~ E EB : mb yL71~f- ite-I Z y R ~ E C E E ~ HAR 2 8 1988 SPOi(ANE CJUitifY . PLA~,~Nf NG DEPARTMfNT , ~ ~ 6 COMMUNICATIONS @ r e . ~ MAY 2 61993 May 18, 1993 { S~Y '~C._ F9, ♦Lr• o e.'"• Spokane County Planning Depai-tment W. 1026 Broadway Spokane, WA 99260 . Atten: Current Planning Section Re: MIDILOME PUD, Formerly MIDILOME 7th US WEST Communications will require a 10' utility easement for this development, as we have indicated on the enclosed copy of the above referenced plat. Sincerely, , K. A. Kruse Manager-Engineering N. 904 Columbus Spokane, Wa. 99202 (509) 455-2779 cc: Simpson Engineers, Inc. N.909 Argonne Road Spokane, WA 99212 • SENDER: Complete items 1 and 2 when additional services are desired, and complete items 3 and 4. Put your address in the "RETURN TO" Space on the reverse side. Failure to do this will prevent this card from being retumed to you. The retum r~ecei t_ fee will provide vou the name of the person delivered to and the date of deliver~ For additional tees the following services are available. C,onsult postmaster for tees and check 6ox(es) for additional service(s) requested. 1. 0 Show to whom delivered, date, and addressee's address. 2. G Restricted Delivery (Fxtra charge) (Extru charge) 3. Article Addressed to: 4. rticle Number ~/7 Type of Service: • ~ ~ dy ~~i/A'~, . Ci Registered El Insured Certified ❑ COD E] Ex ~ess Mail Return Receipt p for Merchandise Always obtain signature of addressee or agent and DATE DELIVERED. 5. Signature - Addressee 8. Addressee's Address (ONLY if X requested and fee paid) 6. Signature Agent X 7. Date of Delivery . PS Form 381 1, Apr. 1989 DOMESTIC RETURN RECEIPT R , SPOKANE COUNTY PLANNIlVG DEPARTMENT North 721 Jefferson Street P 5 5? 5 6 5~1,~7~64 ti~ ~,9. ~v~~ ~Spokane, Washington 99260-0240 . . ~ ~ . ~ . K 9 Uv L2, R 2 i 21 ~4l • 1E rrIc . ~VED W 606 T IRD AVE.fJUE sPOKaNE 14a 99204-1486 AUG 0 9 199, ~~tuRyF O~ ° - I A SP°~ E S NDEp Q/ J ( ~'~ANNING D PAI'-rh,j V ~ eNT Addrenta M►M1.E TA FORWARD t . - ~ ~ . . 3R 32P+D A~LS'UF- ~ I ~ ~ _ _ ~ x s t~ ~ s 1~ . If Portion rr u +S w ~ # %dilomG AdditiOn L ~ rt f► 6 ~ . l~ t ~ ~ ~ 13 2& 31 IT, a i ~ ir I i ~ zx- '9 if I t~ it ~ ~ r~ t~ 't . ~a tt d y ~ 1.46 ~ ~ ~ • xt L* 13 2) ' ~ ~ T ~ ~ ~ • ° - ro 0 rS d~, f~ ~ 40'fli AVE►`tiUF SOUR+CE' E. Si~pstfri Er~$an+~ots, l~c. - . ~ ~ ~ ~L.A'r OSSI I ~ ~ , . 4 ~a`up~4H1 TLo4~S ~ - - - • ` , , - ' ~ . . ~~_.e ~ ~ ' ~ ~ ~ q r , . , ~ ~ ' . ~ ~ ~ . , fi` , , ~ ~ . i .~o ~ . 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' . . , I ,4 . r. 1 . . ~ . ~ ~ I /V~~ ~ ~ FINA A nnents' nvlron ~ n tatem~' npa ct 1r, r ~ i d ~ r ~i oopt~~~~~ S ~~~~n~ M C+a'u _ ~►„'~'~''"~y' ~y o~ ~.e~rd ► ~ ~ F I PIAL ENVIRONfNENTAL IMPACT STATEMENT • MIDILOME SUBDIVISION • Prepared for • Midilome, Inc. • . Lead Agency: County of Spokane • • September 1978 ~ . HAWORTH AND ANDERSON, INC. West 621 Mallon Avenue Spokane, Washington 99201 • • ~ ~ INTRODUCTION The proposed action under review is a request for a zone change from Agricultural to Single Family Residential for approximately 160 acres of land and subsequent development of that property as a suburban residential development. A preliminary plat of the property has also been submitted ~ for approval. The proposed action also includes the issuance of all neces- sary local, state and Federal regulatory permits and approvals. The proposed action was initiated by Midilome, Inc., a 4Jashington corpora- tion, who are the owners and developers of the property. This project was first initiated in March of 1976 when a preliminary plat was'submitted and ~ zone change requested for the first phase of the oroject called Midilome Addi- tion, which consisted of about 25 acres and 72 residential units. The Board of County Commissioners of Spokane County gave final approval to the plat of Midilome Addition on April 7, 1977. The approval of the plat specified that individual on-site septic tanks would be used for waste water disposal. Sub- sequent to this approval the project development proposed the use of a central 0 activated sludge extended aeration sewage treatment system in lieu of indivi- dual on-site septic tanks. The proposed package sewage treatment facility and distribution system was approved by the Sookane County Engineer on May 18, 19772 and by the Spokane County Health District on July 5, 1977. Subsequent to these approvals the developer commenced construction of the sewage treatment system. Acting upon a citizen petition, the Spokane County Board of County Commissioners held a hearing upon the revised sewage treatment proposal on - ~ September 8, 1977, and on September 15, 1977 issued a written approval of the , change in plat conditions. On September 29, 1977 the developer entered into a written maintenance and operation agreement with Spokane County for the sewage treatment system. The above actions and the subsequent approval of the sewage treatment system by the Washington State Departments of Ecology and Social and Hea]th Services are presently the subject of litigation. At the • present time building permits have been issued for all 72 lots approved in Midilome Addition. Of the residential units completed or now under construc- tion 51 units are connected to the package sewage treatment plant and 21 units utilize on-site septic tanks. The following environmental analysis is intended to assess the impact of • the entire Midilome Subdivision project including the 72 units that have pre- viously been approved. The lead agency for this proposal is the County of Spokane. The respon- sible official is the Board of County Commissioners, who have assigned respon- sibility for the environmental review process to Mr. Fred Dayharsh, Director, 0 Spokane County Planning Department. The proposed action may require the following legal actions and permits: 1. Draft and Final Environmental Impact Statements; 2. Zone Change from Agricultural to Single Family Residential; ~ 3. Approval of Preliminary and Final Plats for the project; 4. Approvals or permits from the Spokane County Health District, Washington State Department of Social and Health Services, and the UJashington State Department of Ecology for design and operation of a sewage disposal system; ~ i ~ 5. Sole Source Aquifer review and approval by the federal Environ- mental Protection Agency; • 6. Project review and approval by the federal Department of Housing and Urban Development; and 7. The obtaining of all required building permits. The materials presented in this document represent the products of the Draft Environmental Impact Statement review process. Additions contained ~ herein are revised water section, comments by the reviewers of the Draft EIS, responses to those comments by the lead agency (see Addendum, Final EIS Comments and Responses), and a summary of the contents of the Final EIS. The format of this document follows that prescribed in the SEPA Guidelines (WAC 19 7-10- 580 ) . • This Final Environmental Impact Statement was prepared by Haworth and Anderson under the supervision of the County of Spokane as the lead agency. P1r. Fred Dayharsh is the responsible official. Comments, information, and questions were addressed to Mr. Dayharsh at the Spokane County Planning Department, North 811 Jefferson, Spokane, WA 99201 or (509) 456-2274. Spokane County had the assistance of the consulting firm of Haworth and ~ Anderson, Inc., West 621 Mallon Avenue, Spokane, Washington. Background data in support of this document may be found at both offices of the lead agency and with Haworth and Anderson, Inc. The official date of issue of the Final Environmental Impact Statement is September 13, 1978. The circulation of this document is prescribed in the SEPA Guidelines ~ (WAC 197-10-600) which directs that the Final EIS must go to "the depart- _ ment of ecology, Office of the Governor or the Governor's designee, the Ecological Commission, the lead agency's SEPA Public Information Center, agencies with jurisdiction, and federal agencies with jurisdiction, which received the Draft EIS. The Final EIS shall be made available to the public in the same manner and cost as the Draft EIS". ~ • ~ ii • ~ ~ TABLE OF CONTENTS • INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i DISTRIBUTION LIST . . . . . . . . . . . . . . . . . . . . . . . . . . vi • SUMMARY OF THE CONTENTS OF THE FINAL EIS . . . . . . . . . . . . . . . 1 IMPACT SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Description of the Proposed Action . . . . . . . . . . . . . . . 9 Exi sti ng Condi ti ons . . . . . . . . . . . . . . . . . . . . . . . 13 • The Probable Impact of the Proposed Action . . . . . . . . . . . 18 The Relationship Between Local Short Term Uses of Man's Environment and Maintenance and Enhancement of Long Term Producti vi ty . . . . . . . . . . . . . . . . . . . . . . . 23 Irreversible and/or Irretrievable Corrrvnitments of Resources 24 Measures to Mitigate Adverse Impacts . . . . . . . . . . . . . . 25 ~ Alternatives to the Proposed Project . . . . . . . . . . . . . . 29 Unavoidable Adverse Impacts . . . . . . . . . . . . . . . . . . . 36 APPENDIX A: CATEGORICAL IMPACT ANAYSIS . . . . . . . . . . . . . . . 39 ~ Li st of E1 ements of the Envi ronment . . . . . . . . . . . . . . . . . 39 ~ . Elements of the Physical Environment. : - . . . . . . . . . . . . . . . 41 l. Earth. . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 2. Ai r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 3. Water. . . . . . . . . . . . . . . . . . . . . . . . . . . . -56 , 4. Flora . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.04 41 5. Fa una . . . . . . . . . . . . . . . . . . . . . . . . . . . .104 6. Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . .105 7. Light and Gl are. . . . . . . . . . . . . . . . . . . . . . 107 8. Land Use . . . . . . . . . . . . . . . . . . . . . . . . . . 108 9. Natural Resources. . . . . . . . . . . . . . . . . . . . . • 109 10. Risk of Explosion or Hazardous Emissions . . . . . . . . . •110 ~ El ements of the Human Env i ronment . . . . . . . . . . . . . . . . . . 111 - 1. Population . . . . . . . . . . . . . . . . . . . . . . . . .111 2. Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 3. Economics. . . . . . . . . . . . . . . . . . . . . . . . .112 ; 4. Transportation/Circulation . . . . . . . . . . . . . . . . . 113 ~ 5. Publ ic Services . . . . . . . . . . . . . . . . . . . . . . . 117 6. Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 7. Util ities . . . . . . . . . . . . . . . . . . . . . . . . 124 8. Human Heal th . . . . . . . . . : . s . . . . . . . . . . . . 125 9. Aesthetics . . . . . . . . . . . . s . . . . . . . . . . . . 125 ~ 10. Recreation . . . . . . . . . . . . . . . . . . . . . . . . . 125 ~ 11. Archaeological/Historical. . , e . . . . . . . . . . . . . . 125 12. Additional Population Characteri-stics. . . . . . . . . . . . 125 Ci tati ons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 • iii . ~ APPENDIX B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128 ' Section l: Chemical Quality of Ground Water from Wells in the Vi ci ni ty of the Project Si te . . . . . . . . . . . . . . . . 128 ~ Section 2: Ground Water Quality Data from Uarious Aquifer . Cross Sections . . . . . . . . . . . . . . . . . . . . . . .142 Section 3: Water Quality Data from Depth-Selective Ground ' Water Si tes . . . . . . . . . . . . . . . . . . . . . . . . . 149 ~ ~ APPENDIX C: WASTE WATER TREATMENT OPTIONS . . . . . . . . . . . . . .156 • Ci tati ons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 ~ APPEPJDIX D: REVISED GROUND WATER SECTION . . . . . . . . . . . . . .174 ` APPENDIX E: ESTIMATED DENITRIFICATION COSTS FOR VARIOUS PROCESSES ..227 ~ APPENDIX F: SPECIAL MONITORING RESULTS IN VICINITY OF ' PROJ ECT S ITE . . . . . . . . . . . . . . . . . . . . . . . . . . 239 - ADDENDUM FINAL EIS . . . . . . . . . . . . . . . . . . . . . . . . . .241 r ~ . ` ~ ~ • • iv • ~ LIST OF MAPS AND TABLES Vicinity Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 • Site h1ap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Pl at Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Estimated Effl uent Quali~ty from Al ternati~ve Waste l~Jater Treatment Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Operational Characteristic of ~Vari~ons Treatment Processes. 32 Estimated Total Annual and Uni•t Costs for Al ternative Treatment ~ Processes with a DesTgn Flow of 1.0 MGD . . . . . . . . . . . . . . 33 So i 1 s h1a p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Topography Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Maximum P1onitored Levels of Pollutants . . . . . . . . . . . . . . . . 48 Suspended Particulate Summary . . . . . . . . . . . . . . . . . . . . . 49 1976 Carbon Monoxi de Level s. . . . . . . . . . . . . . . . . . . . . . . . 51 ~ ~ Non-Attai nment Area Map . . . . . . . . . . . . . . . . . . . . . . . 52 CO Moni tori ng Stati on Si tes . . . . . . . . . . . . . . . . . . . . . 53 . CO Concentrati ons . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Aqui fer Recharge Area . . . . . . . . . . . . . . . . . . . . . . . . 59 Thickness and Seismic Profile of the Spokane-Rathdrum Prairie 61 Aquifer Transmissivity Distribution . . . . . . . . . . . . . . . . . 63 ~ Water Level Fluctuations in 4Je11 25/44-23D1 . . . . . . . . . . . . . 65 ~ Aquifer Discharge/Recharge Rates . . . . . . . . . . . . . . . . . . . '67 Estimated Average Rates of Recharge to and Discharge from the Aquifer. 68 Y , Monthly Water Balance Data for Spokane Valley Under Generalized ; Suburban Condi ti ons . . . . . . . . . . . . . . . . . . . . . . . . 71 Summary of Publ i c Water-Supply Systems Obtai ni ng 4Jater from the ~ ~ Aqui fer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Water Qual i ty Standards . . . . . . . . . . . . . . . . . . . . . 76 Summary of Ground-Water-Quality Data . . . . . . . . . . . . . . . . . 78 Records of Locations 6Jhere Constituents in Ground-Water Samples Have Exceeded Chemical Standards . . . . . . . . . . . . . . . 79 Ground Water Quality Standards Violation Sites . . . . . . . . . . . . :gp ~ Historical Nitrate Levels From Selected Wells Near Project Site 82 Variation in Ground Water Quality at Various Aquifer Cross Sections. . 83 . Variation in Ground Water Quality at Various Aquifer Cross Secti ons Map . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 "203" Field Data Average Total Nitrate, mg/1 . . . . . . . . . . . . . 85 "208" Field Data Average Total Nitrate, mg/1 . . . . . . . . . . . . . 87 ~ DSHS Data Average Total Nitrate, mg/1 . . . . . . . . . . . . . . . . gg Location of Depth Selective Groundwater Test Sites . . . . . . . . . . gg Water Quality from Depth Selective Ground Water Sites gp Summary of Annual Water Balance and Percolation Quality Values for Spokane Valley Suburban Conditions . . . . . . . . . . . . . . . . 93 We11 Locations Downstream from Project Site . . . . . . . . . . . . . 95 ~ Distribution of Wastewater Treatment Facilities . . . . . . . . . . . 98 ' Esti mated Effl uent Qual i ty . . . . . . . . . . . . . . . . . . . . . . 100 Noi se Li mi tati ons . . . . . . . . . . . . . . . . . . . . . . . . . . 106 Motor Vehicle Noise Performance Standards . . . . . . . . . . . . . . 106 Exi sti ng Noi se Level s . . . . . . . . . . . . . . . . . . . . . . . . 107 Annual Average Daily Traffic Counts . . . . . . . . . . . . . . 114 Proposed Roadway System . . . . . . . . 116 ~ Location of Public Service Facilities . . . . . . . . . . . . . . . . 118 School Enrollment Expected from Midilome . . . . . . . . . . . . . . . 120 v • ~ DI-STRIBUTIOPJ LIST U.S. Environmental Protecti,on Agency, Seattle • U.S. Soil Conservation Service, Spokane U.S. Soil Conservation Service, ConservatTOn Distri'ct, Spokane State Depa rtment of Commerce and EconomTC Development State Department of Ecology, Eastern RegYOnal Office, Spokane - State Department of Ecology, Olympfa (2) (1 to the SEPA Register) State Ecological Commission State Departnent of Fi sheri es ~ State Department of Game, OlympTa and Spokane State Department of Transportation, Olympia State Department of Transportation, Spokane State Office of Fiscal Management State Department of Social and Health Servi,ces, Olympia State Department of Soci,al and Health Servi-ces, Spokane • State Utilities and Transpertation Commi'ssion, Olympia State Office of Archaeology and Historic Preservatton Spokane County Air Pollution Control Authority Spokane County Board of Commissioners (3) Spokane County Building Department Spokane County Engineer's Office (4) ~ Spokane County Library District (3) Spokane County Pa rk Department . Spokane County Planning Commissi,on (7) Spokane County Planning Department ("o) Spokane County Prosecutinq Attorney, Civil DivTSion (2) Spokane Regional Planning Conference (2) ~ Spokane County Health District,.Environmental Health Division (3) Spokane Fire District No. 1 Pacific Northwest Bell Telephone Company Washi ngton Water Power Cornpany Washington State Energy Office, Olympia Washington State Department of Natural Resources, Colville ~ Washington State Department of Natural Resources, Olym pia Spokane Community Press Spokesman-Review Spokane Daily Chronicle Spokane City Library (2) Valley Herald ~ Eastern Washi ngton Heal th Systems Agency Central Valley School District • Chester Elementary School, Principal Model Irrigation District Bob Tomlinson (5) Willard Sharp ~ Joan Honican William Powell, Attorney Ualley Garbage Services • vi • ~ SUMMARY OF THE COPJTENTS OF THE 'FINAL ' EIS PROPOSED ACTION • The proposed action is for approval of a zone change and preliminary plat and a waste water di-sposal system for the development of the Midilome residential subdivi'sion., The proposed project provi-des for the developrnent of approximately 425 homes on 160 acres of,margi,nal agricultural land in an area south of Opportunity bounded 6y Pi•nes, 40th Avenue, Bowdish, and 32nd • Avenue. The project sponsor is proposi-ng the centralized collection of sewage and waste water and treatment fn a central activated sludge extended . aeration system. The project wi*ll 6e developed fn phases over a three-year period. PROBABLE IMPACTS ' • Earth * Disruption, displacement, compaction and overcovering of soil. * Pave or overbuild of 30 percent of the project site. * Minor alteration of topographrcal contour of the project site. Minor wind and water eroston duri'ng construction phase. Air * Temporary dust and particulates during construction phase. * Sl i ght i-ncrease fn emi-ssi,ons from Fieati-ng and ai r condi ti oni ng ~ systems and fireplaces. * Increase i-n traffi*c rel ated emi ssi ons . Water * Disruption and alteration of existinq surface water runoff ~ characteri'stics. * Construction of impervTOUS surfaces over 30 percent of the site. * Potential ground water contamination from percolation of su rface water runoff. * Disposal of over six million cuhic feet of treated waste water annually to drainfield located over the aquifer. Potential ground water contamination from sub-surface disposal of treated waste water effluent. F1 ora * Removal of 160 acres of marginal farmland from production. * Replacement of existing flora with domestic landscaping. ♦ . Fauna * Decrease in number and diversity of species. * Removal and disruption of wildlife habitat. • 1 • . ' Noise * Temporary increase i-n ambient lev els'during construction. * Increase in noise after development due to increased traffic ~ and suburban resi-denti,al acti,vi'ties. Light and Glare * New sources of 1Tght created. . • Land Use * Compati,ble with surroundi,ng land uses. * Replacement of margtnal agri-cultural use wi-th more intensive residential use. * Construction of 425 new homes. • Natural Resources * Consumption of building materT-al and energy. * Energy consumption for space heating and cooling and transportation. * Withdrawal of 160 acres of marginal land from agricul tural pro- r duction. Risk of Explosion or Hazardous EmTSSi,on . * Temporary risk.during constructi,on phase. • Population * Housing for a total population of approximately 1,300 persons. Housi ng Constructi,on of approximately 425 new homes. Transportation/Circulation * Generation of about 3,400 trips per day. * Internal roadway system paved and curbed. • Publ ic Services * Increase in fire and poiice protection service requirements. * Increased school district enrollment by 500 students. * Temporary overcrowding of junior and senior high schools. * Increased need for additional school district facilities. ~ * Increased utilization of park and recreational facilities. * Increased roadway system maintenance costs. . • 2 • ~ Energy * Consume estimated 250,000 ttierms of natural gas. w * Consume estimated 1.5 to 2.0 mi-l l ion kwh of el ectricity. * Direct and indirect consumntTOn of energy for space heating, air conditi,oni•ng, li-ghttng and transportation. Utilities Increase in utili-ty servTCe requ rrem ents. * Water consumptTOn of 14 mY11TOn cu6YC feet per year. * Generati-on of six mil l i-on cu6TC feet per year of waste water. * Generati-on of 1,100 tons of sol i-d waste per year. Human Health • (Please refer to the secti-on on Ground Vlater Quantity.) Aesthetics * No adverse impacts identi,fTed. • Recreation* , , • * No adverse impacts identified. Archaeological/Histori,cal • * No adverse impacts identYffed. ALTERNATIVES No Acti on • * Site would remain temporarily in limited agricultural use. * Al 1 ows subsequent development wi th different or greater en- vironmental impacts. * Allows subsequent piecemeal developm ent precluding centralized waste water collection. • . . Alternate Sites * No applicant ownership or control of alternate sites. * Pose same or equivalent impacts in terms of traffic, site devel- opment, utility and servlce demands, noise, light and glare, and ~ air quality impact. * Reduced ground water quality impact if site not located over aqyifer. r 3 • ~ Alternate Development Concepts * Lower densi~ty developm ent would mitTgate impact on air quality, traffic generation, notse, schools and other public service and ~ utii ity requi-rements. . * Lower densi,ty would result i'n higher per unit cost of housing. * Hi gher per uni t development cost for uti 1 i ti es . - * Central collection and treatment of waste water less feasible at lower densi-ty. . . • Alternate Sewage Treatment Alternative Land Application System * Tertiary treatment method. * Effluent with low nutH-ent concentration. ! * More effecti've than su6-surface dTSposal. * Requ i-res 50 to 100 acrds of 1 and . * High development cost. * Alternate disposal requTred during wTnter months. * Publ ic heal th ri sk from water overspray. ♦ Pond and Lagoon Systerns . * Effl uent qual i ty-margTnal wTth nutrient removal equival ent to septic tanks. * Surface di-scharge not feasTble due to marginal effluent quality and lack of proxtmity to s'urface water. ~ * tJould require non-overflow lagoon (50 or more acres of land) or effl uent di scharge to drai-nfi-el d. * Odor and other operati-onal probl ems. On-site Disposal System (Septic Tanks) . ♦ * Function with minimal maintenance. * Effluent quality is not improved over activated sludge system. * Effl uent not centrally col 1 ected . * No flexibility to upgrade level of treatment. * No infrastructu re developed if central corrmunity treatment system i s requ i red . ~ MITIGATING MEASURES Earth * Minimize areas of soils disruption. ~ * Mulching and landscaping of disturbed areas. * Fol 1 ow natu ral contourg of 1 and. * Measures to prevent erosion and stabilize soils. Air * Application of water or dust pallative to reduce dust from con- ` struction. * Traffic detouring where required. 4 . ~ ~ * Implementation of Federal Automo6Tle emission control standards. ~ * Proper operati on and maT-ntenance of sewag e treatment pl ant to eliminate odors. ~ • ~ Water ~ * Addition of denitrTfTCation anit operations to treatment plant. ~ * Central co-11ectTOn and tr-eatment provides flexibility to meet ~ future needso i • * Infrastructu re for communtty system developed, a • * Proper dratnfiel d sel ectTOn. * Reduce significantly the density of the development. I * OperatTOn of monitoring wells. ; * Buffer zone between drai,nffeld location and well locations. • Flora y * Site landscaping in areas wherevegetation removed. Fauna . ~ Site landscaping in areas where•vegetati-on removed. , . ~ Noise € * Selecti-ve berming or vegetati,on along roadways. * Sound i-nsulati,on of homes Tn hi-gh impact areas. - r * Orient homes to mi-nimTZe noi,se exposures. ► Lijht and Gl are * Landscaping. * Aesthetic design. • Land Use * Lower density development. _-~Natural Resources • ~ , Design that minimizes resource consumption. Utilize energy effYCient design featu res. Ri s k of Expl osi on or Hazardous Emi ss ion None. ' Population - * None. • ~ , 5 . ~ Housi ng * None. s Transportation/CirculatTOn * Reduce traffTC by encouraging alternate methods of transpo rtation. * Roadway system i-mpnovements. ~ * Street names consi'stent with surroundTng area. ~ ~ Public Services * Increased property tax revenues•. ~ * Expansi-on of school distr7ct facllTties. ; * Sidewal ks Yn vici-ntty of school s. ; * Temporary 6using of students or realignment of attendance bounda ries. EnergX * Utilization of energy effT,cient desTgn features. r Utilities . * Close coordinatTOn 6etween sponsor and utility firms. . * Buffer zone 6etween drainfield and well sites. Human Health * N/ A Aesthetics N/A ~ Recreation . N/A Ar.chaeol ogi cal /Hi s -Lorical ~ N/A UNAVOIDABLE ADVERSE IMPACTS Earth ♦ * Disruption, displacement and overcovering of soils on-site. * Pave or overbuild of 30 percent of site. _ Air * Uncontrollable dust during construction phase. ~ * Increased emissions from vehicle traffic. 6 ~ ~ Water * Alteration of surface water a6sorption characteristics. • * Potential surface water contaminati,on of ground water. * PotentTal ground water contamfnation from disposal of treated waste water effluent. F1 ora Removal of 160 acres of-margTnally productTVe farmland. Fauna * Disruption of wildlTfe habitat. * Minimal reduction Tn num6er of species. • Noise * Some increase in ambient noi-se levels during construction. * Increase in noise levels due to Tncreased vehicle traffic. ~ Land Use * ConversTOn of 160 acres of marginal farmland into more intensive residential use. Natural Resources - Direct and indirect consumption of natural resoOrces for building material and energy, * 160 acres of margTnal farmland taken out of production. Risk ofi Explosion or Hazardous'Emission ♦ * None. Population * Increased demand for public services and facilities. ~ Housing * None. Transportation/Circulation Generation of additional traffic over existing roadway systwns. Public Services * Increased service requirements for police and fire protection, • educational and recreational facilities and roadway maintenance. • 7 ~ * Addition of 500 students to school district enrollment. * Temporary overcrowdi-ng in school di-strict facil Tties. Energy ~ * Direct and Tndirect increase i,n consumption of energy for space heati ng and cool i-ng and t-ransportati on. Utilities • * Increase fn util fty service requirenents for the area. Human Health N/A Aesthetics N/A Recreation N/A ~ Archaeological/Historical N/A • ♦ • ♦ • . 8 • ~ ~ . APPENDIX D ~ REVISED GROUND WATER SECTION The following section contains revised ground water information ~ received after the i'ssuance of the Draft Environmental Tmpact Statement. . The pages of original text have been included with the additions and/or changes underlined. • • ~ • ♦ ♦ i74 • - ` 3.6 Ground ►1Jater Movement ~ a. Existing Conditions The Spokane-Rathdrum aquifer extends from near Spirit Lake and Pend Oreille Lake in Bonner and Kootenai Counties, Idaho, southwest across the Rathdrum Prairie and down the Spokane Valley through the City of Spokane, terminating at the confluence of the Spokane River and the Little Spokane River. The aquifer is the primary source of drinking water for approximately ~ 350,000 people in an'area which includes the cities of Spirit Lake, Athol, Rathdrum, Hayden Lake, Coeur d'Alene and Post Falls, Idaho and Spokane, Washington. The recharge zone is that area through which water enters or could enter into the`aquifer. For the Spokane-Rathdrum aquifer the recharge zone is the land area directly overlying and adjacent to the aauifer as shown on the following figure. There is an upstream headwaters area draining • into the aquifer "recharge zone which contributes approximately 90 percent of the recharge flow to the Spokane-Rathdrum aquifer. This streamflow area which feeds the aquifer covers an area of about 350 square miles and is shown in the following figure. Geol oU I • The Spokane Valley-Rathdrum Prairie aquifer is composed predominantly of Quaternary glaciofluvial deposits which extend from Pend Oreille Lake, Idaho to north of Spokane, GJashington. The deposits consist primarily of sand and gravel, fine to coarse, and are poorly to moderately sorted, having scattered cobbles and boulders. The sand and gravel is relatively free of • fine sand and silt, except in the uppermost three to five feet, where fine grained material fill most voids in the sand and gravel. In the Hillyard trough, near the downstream end of the aquifer, the sediments become pro- gressively finer toward the north, where the aquifer is composed predominantZy of stratified sand but includes some gravel and silt and a few boulders. ~ In most areas, the aquifer overlies the semiconsolidated, fine grained Latah formation of Miocene age. In some areas the aquifer has abrupt lateral contacts with sloping bedrock surfaces, but in other areas, it grades laterally into less permeable, unconsolidated materials which are not readily distin- guishable from the aquifer material. In such places, the selected boundaries of the aquifer recharge area are somewhat arbitrary. r The thickness of the aquifer is not well established. The best data exist where two sfismic surveys have supplemented available drilling data. The seismic data indicate a total thickness of about 400 feet of uncon- solidated material near the Idaho-Washington state line. Because the water table is at a depth of about 120 feet, the saturated thickness of the aquifer ~ is about 280 feet. In tht Hillyard trough, a test hole showed 780 feet of unconsolidated materials. A seismic interpretation for the same area desig- nated about 160 feet of these material as the saturated part of the aquifer with about 150 feet of unsaturated materials above the aquifer. A diagram of the seismic profiles is shown in the following figure. ~ In general the only wells that penetrate the entire thickness of the aquifer do so near its extremeties, in the thinner parts of the aquifer. • 58 175 395 IJ ~ J f 11t'aJ rtu~re:~ 6W: MkIP llYaIflf: ~ PIC85;YfII Pfa111e I ne pa f ~I 1 _s14nun7 FManlr liq . ~ c /t ~ ~ / f ~ • ~~1 ~ ~ O~, _ - r SF# k @ Ua 11 . . iieni ~ 6rnoaw~r An SPr~qh ~ A• f 9"~ ~ Sma9~s A.e I • 94 ~ . ✓ ' ~p~'ar~~a~,icy. Lihrrcy E.akr ~ SVUK,t+rICINCf:uNnrillNAL ~ ! ~ ~~Irnro3e .UkPOH'f ~ A~~~~ ~~+p~he 4ilc • _ i ~ . ~ f~._. . hloran Prainc ¢ ¢ f AQUIFER RECIiARGC +IIIEA a w ~g y ~uNeauLL:l 5011RCC: U.5.G.5 r ~ UNITEO STATES OEPARTMENT OF THE INl'ERIOR Preoarod in toopereifon wrth the OPEN-FILE REPORT 77-829 ~ OEOLOalCAL SURVEY U.5_ ENVIRONMENTAL PROTECTION A(3ENCY Pi.ATE 1 BRITISN COLUk814 ALBER7A . ~ ) i.SHINGTON nreo o! moa ~ fACMTANO . • \ ~ \ 9 114° ioaxo caneps • ~ o VNIi[0 49 9tATE7 e/ s I • ~ ~ : o 17 PenO ~ • • ///Surfcce -woter siree C~-~ ~n t~i3 OrlO Qr! Ri"~ snown on Piaio !0. ~ . 18 POnC ~i]° s ~ ` 10 • .I ( OrAr{/.~ I - t ~CdFe•'~.. . ~ • ~~J 'Po~ • ,8° ~ F/oiAsoo _ ~ , .n I • ~ y COAO ~i . e o ~ o : ~ i f ~S o = ♦ ' I =SPOKANE Ccevr 20 a""23 15 14 P ° 1 28 d 4/ene : p ~ Lc.tc a~.n• 22 • 0 12 : a 21' oae~ I • `u o q 27 t3 _ - _1= 2s ~ ; 2S S~ ~ ~o. 4 . _ y •t' 8 • ~4r° ~ 6 001 . h41SS0ULA 7 4 cio.. i • 3 r^JCPLANAT ION ~ C , Drainage divide of Spo?cane River- 2 ~ Coeur fl'Alene Lake Basin. • • Drainage divide of the Pend Oreille Lake Basin. 1 ( ~ 6UTTE A22 Surface-water data collection site 46 and number. Spokane Valley-Rathdrum Prairie ~ aquifer_ ,/0 • 10 20 30 40 50 60MILES ~1 •I S- ffam U 5 G6e1201ca1 Surrey • . ~ Inl~rnar~oaa~ Joint Cbam q ColumO~o i.~r Oa+~n, 19]S, i: i, aoo,oao N, • PLATE 1.-- viap showing the parts of the Spokane River basin and the Pend Oreille River ba.sin. Washington, Idaho. rand Montai1a. which are recharge areas for the Spokane Vtillcy-Rathdruni Prairie aquifer. ~ ~ 60 , 177 - ,9 Y , , r ~ ' . THICKNESS AND SEISi . ~ . : . . . . ~ bIIC PROFILE OF • THE SPOKANE-RATHDRUM PRAIRIE ; ■ . . • ■ ; . . . . • o :~pirit.Lske::.:. . Bavview • WASHINGTON I i .Athol,~.'::::.::~...:: . ~ DAHO . . ~ ~ : . : . . . . . . : : : ~ ~ . ■ . . 0 ■ ~ . i : . . : ■ ~ ■ Cl11C0 ' ~ . . ~ ' ~ . . ~ . • ~ 0 Hauser Newman L,ake o Lake .::.~:.Rathdrum. . . • Ha}Jden Lai:; ~ N..••~ : : : : : : : : " . ~ Hiltyard Prafile ' : • ; : :,;,~t~ ; . pOSt ~ . . . . . : ' : : . : . ~ r::~.::;:~ . ~ .Falls . ..:~!E::-: : . . ; ...S okane : . . Coeur d'Alene . Walle . . : ; Spokane':;::Y~ State Line proffl ; ~ ~ e • . ~ ~ • ~ • •ti•'" Liberty Aforan Prairie Lake 0 ~ Coeur d' alene ~ Lake ~ ~ STATE LINE SEISA4IC pROFILE HILLYARD TROUGH a SEISA4IC PROFILE 2000 J I~ L~'^ a 180 . _ ~ y Table O ~ '.s,:'. ;r:, . _ J , 1'::'.•.`•:.'i : :!•.r~='.: ~s~.t.,..r' . 1 ~ a~'7 ,•ay, . : ~ •~:'s•::;. Glac!al & Gla n 600- _ `~~:S:s•~=~:;~, ~:i•,,~T ,:s~~:.-~, ~ , c7a! W ~ .Y•• a: r~ f' 8tet m j _ ',:;wn ,r; •-r;~ri. ,i°;.r~{: «.,::•~S~ - . . Table < Fluvial Deposits a '-._:::;•s . • ~ . , ~ A 1400 - \`\``\,~J ~ \ ~ ',3:• :l':~ :y~^--`.%' •'i~~i:~/.'•: e • ~ vs Latah F ormatio,,- c y, m ; 1200_ - w E ~ . - G _ ~ ' - • 100Q ~ ranite Rocl< Granite Rock soo ao oc o ; : ~ 0 0° o° c o 0 0 ° o°c o ° o 00 ~ SOURCE: Esvelt & Saxon, Consuiting Engineers Oistance in feet from indicated reference ~ H.i ircrx rx c.~.~•r~tRSf~.v. r.~~ , (:onut+ftwiis irt tnearu+imrw.tl ,rr1JI)~;ii. ylJ~t~ltu , ~~V~tur.~~~•, 3 178 ~ ~ 4Jells drilled away from the margins generally penetrate only 50 feet or . less below the water table. • The project site is located near the margin of the aquifer in the area south of Opportunity. In the area the ground water is thi.nner than in the main body of the aquifer to the north. Hydraulic Characteristics 4 • The transmissivity of the aquifer (the rate at which water will flow through a unit width of the aquifer under a unit hydraulic gradient) is gen- erally high. Values calculated by the U.S. Geological Survey for designated parts of the aquifer are shown on the following fi,gure. Transmissivities calculated by the U.S.G.S. range from .13 million ft2 per day in the western • end of the aquifer to about 3.4 million ft2 per day near the Washington-Idaho s ta te 1 i ne . The transmissivity of the aquifer at a certain point is a function of the depth or thickness of the aquifer at that point. As discussed in the previous section the project site is located on the southern margin of the • aquifer where the aquifer is thinner. This would result generally in a lower transmissivity of the aquifer in the vicinity of the project site than in the main body of the aquifer to the north. The finer grained soils which under- lay the project site would also tend to reduce the transmissivity of the aquifer at this point. A lower transmissivity of the aquifer in the vicinity of the project site would result in a lower flow rate per unit width of the ~ aquifer and probably less mixing action than occurs in the main body of the aquifer to the north. Calculated values of ground water velocities are relati.vely high. U.S.G.S. calculations for the aquifer at the state line indicated a velocity of about 64 feet per day. In an earlier study conducted by the U.S. Army Corps of ~ Engineers a different set of estimated aquifer characteristics r!~sulted in a calculated velocity of about 90 feet per day at the state line. - For the Hillyard trough the U.S.G.S. calculated average velocity is about 47 feet per day. In the Corps of Engineers study, the velocity was calculated to be 41 feet per day. These values are relatively high `or a ground water system and indicate that the aquifer is a very dynamic system and not a relatively stable ~ pool of water. The lower transmissivity and fine grained soils which characterize the aquifer near the project site would tend to result in lower ground water velocities than are found in the main body of the aquifer to the north of the , project site. - ~ The U.S.G.S. has calculated the rate of ground water flow in the aquifer to be 960 and 350 cuWc feet per second at th2 state line and in the Hillyard trough, respectively. Similar rates calculated in the U.S. Army Corp ~ of Engineers Study were 1,000 and 200 cubic feet per second, respectively. ~ Water Level s The water table in the aquifer slopes from the Hoodoo Valley and Lake Pend Oreille, Idaho to the Dartford area north of Spokane, 4lashington. The ~ 62 179 <O ~~t:ld Peone Rtl . ' 'OS \ LeceNu us 395 wwmo ia Ra TrunvnissiriiY (it2 1daY1 i LOlUllfy 11~5 Avcrrdc raluc (or dcsignaieA pyrl oi \ o SC~,~n ~fl~t , the aquifer. Calevluled by cnmputer Five Q1ile Prairie ~ 25 x I1) 6 i. malcl designcJ by J.V.'fracy, US. Cnological Survcy, based uo rrlculalel Iluw rules anJ waicrteblu gradienU. i~ o, 0 . ~ • O Fleafent Prairle Rp v1anclsava ~o+k 04' N N O y~ N I D ~ ~ Q a n a , u w iosioy Ave `r 0 t O ~ ` t / i ^ a~~ o,'J6 Di P:ISJdCll:l P;i!'k I J SPDK1~N F4„ ~µs s,~ , Q W ~0lrqw~r / 5~y RlIll1VUUl~ NeW„qn~''~ t Aye b~`v G~~~ P,irk++~atcr , \ ~ ~ : c 2.~~ ~fl ~ Tront Ave o ~ L I\ e C 1•70 I u t I Or oway Ave ~ c c ~ 0 " P I)ishman 1'cia,lak ~ 5craauo H Q ( Sn ,wue Ar. , i•90 ' ~ c ° z ~ a a x c a > C n = ~ \ ~ G NI fi~ caK ,.a i.I i KvariuN,« ~Pro tunity \ntvaer c I q h 4a . ~ 0 29t Ave ~~l'11f01L J n0 A~e (i S i~fE ]/ln Ava h~RA A n Ave Ilnrmi I'r:IIfIC ~UK@ MILF.~ a;~„~ AQUIFCR TI2ANS,IIISSIVITY 111STRIeU7'lQN ~ . . . 0 ~ ~ ~ ~ ~ ~ • • • , • ~ ~ a aquifer is at a maximum elevation of about 2,180 feet in northern Idaho and ~ ~ declines to about 1,540 feet in the area north of Spokane. The water table in the northernmost part of the aquifer slopes about 20 feet per mile of length, _ while the major portion of the aquifer from northern Idaho to the southern edge of the Hillyard trough slopes relatively gently, from two to 10 feet per ; mile. The average annual elevation of the-water table is shown in the figure above. r • ? The water table contoursshown on the above referenced figure reflect the estimated annual average elevation. The water table at a particular loca- tion will vary seasonally with surface water runoff, precipitation and other climatic factors. Water level fluctuations are generally less than 15 feet during a year in most areas. Generally the greatest annual fluctuations occur ~ in those wells nearest to the Spokane River, in response to changing stages : - of the river, lJater level fluctuations from a well located in the vicinity of the project site are shown on the following hydrograph. , The depth to the water table is the greatest in northern Idaho, about 300 to 400 feet below the land surface, and becomes gradually shallower • downstream, reaching depths of about 120 feet at the lAJashington=Idaho state line and about 40 feet near Spokane. Continuing downstream the depth to the water table increases to abotit 150 feet in the Hillyard trough.8 In the vicinity of the project site the dept4 to the water table ranges from about 70 to 90 feet below the land surface. b. The Probable Impact of the Proposed Action ~ The project site is located nPar the margin of the aquifer south of ' Opportunity. The aquifer is thinner and has a iower transmissivity in this area than in the main body of the aquifer to tne north. rne seasonai fluctuations of the water table and the relatively high salt content of the water in this area has lead to the possibility that there is very ♦ little flow of groundwater in this area. While it is not anticipated that the proposed project will have any perceQtible impact on the geology or hydrology of the aquiter, tne existing hydrology of the aquifer near the project site maKe it more suceptible to potential water quality degradation trom project related effluents. • c. Measures to Mitigate Adverse Impacts None. . d. Unavoidable Adverse Impacts • None. • 64 S 181 . ~ Water Level FlGctuati4rrs i n We11 25/44-23D1 ,1931 w77 80 ' ' 85 5 go 5~S 100 " i I 1 1 1 I 1 1931 1932 1933 1934 1935 1936 1937 1938 1939 75 ~ I I ~ i I I 1 M ` - ' 80 W $5 < ` U- 90 ~ 9r,, ~ 104J ~ 1940 1941 1742 1743 1744 1745 1946 17~~ 1948 i ~ ■5 I ! a ! I ~ i I Y 3: ~ 80 LW 54 m 85 ~ 90 z 95 toa 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 ~ ~ 75 o $o ~ ~ 85 - ~ ~ 90 - ~ 95 - - li 100 1959 1960 1961'1962 1963 1964 1565 1966 1967 1968 75 ' i 1 r 84J y ~4 x , ~ • 85 ~y~y 7 V ` 1 95 ^ V 100 14 1 E I I 1 1969 1970 1971 1972 1973 1974 1915 1976 1917 ~ IMelt numher: 25/44-23DI; Depth: 97 ft ; Water use: Irrigation. ~ 1 ~ ~ 3.7 Ground Water Quantity . a. Existing Conditions Water Flow . ~ The U.S.G.S. has calculated the rate of ground water flow in the aqui- fer to be 960 and 350 cubic feet per second at the state line and in the Hillyard trough, respectively. Similar rates calculated in the U.S. Army Corps of Engineers Study were 1,000 and 200 cubic feet per second, respective- ly. Preliminary results of the "208" study indicate a lower flow rate. Recharge to and Discharqe from the Aquifer10 • The aquifer is recharged by percolation of surface water runoff and underflow from adjacent highlands, by percolation of precipitation, by seepage from the Spokane River, by seepage from lakes which lie adjacent to the aquifer, and by percolation of irrigation water diverted from sur- face water sources. The following figure and table show the locations and ~ rate of recharge to and discharge from the aquifer as estig)ted by the U.S.G.S. using the results from a number of prior studies. In the hi-ghlands and hills which lie adjacent to the aquifer, precipi- tation produces small streams which lose most of their water to infiltration as they flow only short distances across the land area above the aquifer. + Some surface recharge probably occurs in the area south of the project site at the sink area where Plouf Creek disappears. Coeur d'Alene, Pend Oreille, Spirit, Twin, Hayden, Hauser, Newman and Liberty Lakes are all adjacent to the aquifer. Part of the water that floars into these lakes is evapor- transpired, diverted, increases storage or becomes surface outflow, and part percolates into the ground and recharges the aquifer. The average inflow to ♦ the aquifer from these adjoining areas totals about 1,010 cubic feet per second, with about 800 cubic feet per second in Idaho and about 210 cubic feet per second in Washington. Direct recharge from precipitation has been calculated to be 130 cfs for ldaho and 50 cfs for Washington. These amounts represent that part of the precipitation which is not lost as surface runoff or as evapotranspiration and is therefore available for recharge to ~ the aquifer. The aquifer receives an average of about 80 cfs from the Spokane River between Post Fa11s, Idaho and Greenacres, Washington. Addi- tional recharge comes from the Spokane River near Post Falls, Idaho where about 100 cfs is diverted from the river and used for irrigation. It is estimated that about one-half of this amount recharges the aquifer. The above estimates give a total of about 1,320 cfs. ~ The aquifer loses water to the Spokane and Little Spokane Rivers at an average rate of about 1,090 cfs. An additional ground water outflow of about 55 _cfs occurs at the downstream end of the aquifer near Nine Mile Falls, Washington. Water use accounts for most of the remainder of ground water discharge. Approximately 62 cfs of water in Washington and 2 cfs of ~ water in Idaho are pumped from the aquifer and eventually discharged to the Spokane River through municipal sewer systems. In addition, large quantities ~ 66 183 [iruuudw,i r4i ch}itli,w ~ LF;CEAip , All numhcr.; in rlu6lr {eel pu uxwW IN -.~10 17om Inloayui[u from ndJrNhilng nra +I e h1L $PO~B1W Paf M Ilr RLvhorge W lde aquifcr + ~ - Lkitch-rgc fmm cFe aqWFcJ s oarxwar ~ sIfIC h111C 11emEarge Frum {-I iu rcclwign lo (+l • ~ t ~ C*~~ Poorta fip ~ the Nqai(rr Lbru4d iha Sp~-,FLd ' Five 11dc Praidr IALIC WILne w,eff, • . " plcasml Pralrie ~lawlnome itp ~ . ~vcn 111~1e ~ ' ~~I 1'alal Punrping Lusv + t I J lI5W55IIi IIg luk1 t65 120 123 + 5 } ~ 11arF`an ¢ ~ {haasynl MiniB ka 1 L.. Frdnci~ Ar9 IS 4 . L - ~L~ ~ ~ $ • ~ i~~ + e ' ~ + 11 + z~o A s }g " M P. k ' 330 '1'rentwbod ' ~ S o kOn C)on ~ ro ~y +S(1 ~Ii54SrCliard5 . Y-~ ~ ~r44gr ~ J I ~ ms V,vG,~ 2 30 S P V P°~ 0 1 LLrw7weV are ' 9a ~ tlnl SblJ-0L~ AY6 I ~ hman m A-. I c Opj)oflllnily • ]pl - r• _ 4 uJ ~ } ~ o- , Vefadake +24 ~ a r P [ - a~~a a., ~ PreClpilalinn • at~m A~a ; I.ibe~y iake 5f'(SAAKE 11TEYiY,11lf1\AL ~ J 1Nlk1111$ 1 3 ■ ~ A1HI'lm f Evripnlrqatplni lioll 4 SITI: lf _`Zf~° - ~ i•50 ~ Mman Pr,birie 0 ¢ + ~ ~O r 4 ! ~ r`s • ~ ~ AQlllFFR [)15CHARCEfI;L4'EIARGE NATES n iPs 3m +d am ~ u,„ ...,,or , ~(iI+F:MILFI 50URCC: U.5.G,8, I ~ ESTIMATED AUERAGE RATES OF RECHARGE TO AND DISCHARGE FROM ~ THE AQUIFER Cubic Feet Per Second Subtotal Total ' - ~ RECHARGE i ~ Flow into aquifer from adjoining areas +13010 Idaho +800 4Jash i ngton +210 ' Precipitation minus evapotranspiration on the land surface above the aquifer + 180 4 Idaho +130 ~ • ' Washi ngton + 50 Seepage from Spokane River between Post Falls, Idaho, and Greenacres, Washington + 80 Inflow from surface-water diversion (recharge by water diverted from Spokane River east of Post Falls, Idaho, and applied to l-and _ ~ surface above aquifer) + 50 i TOTAL RECHARGE +11320. DISCHARGE ~ ~ • Seepage to Spokane River. - 780 Greenacres to Trent, Washington -330 Trent to Spokane, Washington -230 Spokane to Seven Mile Bridge, Washington -120 Seven-Mile Bridge to Nine-Mile Bridge, , • Washi ngton -100 Seepage to Little Spokane River between Dartford and about 3 miles above its mouth - 310 Total pumping loss in Washington - 127 Ground water pumped from aquifer and discharged to Spokane River and Peone Creek - 62 ~ Consumptive use of ground water (water pumped from aquifer and removed by evapotranspiration - 65 Total pumping loss in Idaho - 48 : Ground water pumped from aquifer and discharged to Spokane River - 2 ' ~ Consumptive use of ground water (water pumped ` from aquifer and removed by evapotranspiration) - 46 Ground water outflow below Nine-Mile Fa11s - 55 TOTAL DISCHARGE -13320 ~ CHANGE IN STORAGE 0 Source: United States Geological Survey (1978). ~ 68 185 ~ of water are pumped from the aquifer and applied as irrigation water on the land surface or are discharged to sabsurface d~sposal 'systems, after domestic or industrial use, where potentially part of the water returns, by infiltra- ~ tion, to the aquifer. ~ . Irrigation use of ground water averages about 31 cfs in Washington and 61 cfs in Idaho. Assuming a consumptive-use factor of 0.67, a total of 21 cfs i n 6Jashi ngton and 41 cfs i n Idaho are 1 ost from the aqui fer. 4later pumped from the aquifer and discharged to cesspools or drain fields, or used • for domestic irrigation, averages about 74 cfs in Washington and 9 cfs in Idaho. Using a consumptive use factor of 0.59, as calculated by Todd (U.S. Army Corps of Engineers, 1976), total loss from the aquifer is about 44 cfs . in tJashington and 5 cfs in Idaho. These various pumping losses total 127 cfs in Washington and 48 cfs in Idaho, for a total pumping loss of 175 cfs. ~ The above estimates give an average rate of discharge of about 1,320 cfs. ; This is equal to the estimated average recharge rate. Because no long-term ! change in storage within the aquifer has been observed within the past 50 years, based on water table fluctuations,it is assumed that a state of near equilibrium exists in the aquifer. ~ . • Potential Recharqe from Sewa ge Disposal System Orainfields r as discussed above, based on U.S.G.S. estimates 74 cfs in tdashington and ► 9 cfs in Idaho is pumped from the aquifer and used for sewage disposal in drainfields or for domestic irrigation. Using a consumptive use factor of .59 as cglculated by Todd in the U.S. Army Corps of -Engineers study, a total of 30 ~ cfs in Washington and 4 cfs in Idaho would be available for recharge to the aquifer. Of the 30 cfs in Washington, about two-thirds or ZO cfs is the result . of domestic irrigation, leaving about 10 cfs the result of sewage disposal.12 If all of the above where to in fact recharge the aquifer it would constitute approximately three percent of the total volume of water which recharges the aquifer. • The literature to date continues to show a conflict over the probability of drainfields as an aquifer recharge source. A test drilling program was conducted by J. 4J.-Crosby of 6Jashington State University from 1967 through 1970, to evaluate ground water and pollutant movement from various sources in the Spokane Valley. 13 He found the soil to have a low natural moisture con- ~ tent coupled with apparent high moisture tensions. These results led him to suggest that soil moisture was not moving downward to the ground water table. In the final report of the results of the drilling program, Crosby states as a conclusion of the study:l4 : Further study of the moisture conditions in the Spokane outwash ` gravels has strengthened the earlier conclusion (Crosby, et al ~ 1968) that these deposits are generally in a highly stressed moisture condition. Ground water recharge cannot be demonstrated as occurring in response to precipitation. Instead, it is sug- gested that recharge is associated primarily with marginal streams that discharge onto the outwash plain maintaining saturated condi- . tions in the gravels for extended periods of time. Precipitation is stored in the upper strata and apparently removed during the growing seasons. Dominant moisture movement is probably in response to capillary and thermal gradients. ~ I 196 ~ ~ Further on in his conclustions Crosby states: ~ These writers postulate that drainfield waters may in the early stages•of field use percolate to depth. However, as organic matters are formed as described by McMichael and McKee (1966), Buter, et. al. (1954) and Calwell (1938) further deep perco- lation is arrested and moisture movement is predominantly ~ lateral in response to capillary forces. The initial moisture . at depth is rapidiy dissipated as equilibrium is reestablished with the surrounding media. The investigations of Crosby,et. al., have been criticized on the basis that the samples from the drilling program were only taken during the summer ~ months when the rate of moisture removal by evapotranspiration would be the highest. In addition the Crosby studies reported no significant salt build- up in the soil beneath drainfields, which could suggest that at some time of the year any salt accumulations are flushed downward.15 Crosby attributes the low soil nitrate levels to denitrification at depth. The moisture deficit in the soil with a lack of salt buildup appears to be contradictory regarding the ultimate fate of the drainfield effluent. • In 1976, a report on the water resources of the metropolitan Spokane region was completed by the U.S. Army Corps of Engineers 16 This study in- cluded an analytical investigation by Todd of the drainfield percolation mechanism to determine if this effluent could be reaching the ground water. The purpose of the investigation was to determine from calculations of the • evapotranspiration mechanism whether moisture is available for percolation under suburban development conditions after evapotranspiration needs are satisfied. Todd came to the following conclusion based on the results of the study: An analysis of the evapotranspiration mechanism for urban and ~ suburban land use conditions in the Spokane Valley indicates that a significant proportion of the leachate from septic tank drainfields, is available for percolation to the water table of the ground water. The analysis of soil moisture behavior is based on a conservative interpretation of data and a conserva- tive application of soil moisture transport technology. Not- • withstanding the conservative approach, the analytical results indicate a net surplus of leachate available for percolation to groundwater. . A monthly water balance for the Spokane Valley under generalized suburban conditions (assuming an overall gross density of three residential'units ~ per acre) developed for the above study is included in the follotiring table. This water balance indicates that surplus water over and above potential evapotranspiration is available from November through April. The total average annual surplus was estimated to be 14.22 inches, and constitutes 41 percent of the total precipitation plus drainfield effluent. ~ The preliminary results of the ongoing "208" Water Quality Management program for the Spokane-Rathdrum Aquifer, being conducted by Spokane County ~ 70 187 MONTHLY WATER BALANCE DATA FOR SPOKANE VALLEY UNDER GENERALIZED SUBURBAN CONDITIONS J F M A M J J A S 0 N D YR. Precipitation 3.15 2.04 1.70 1.10 1.83 1.44 ,52 ,65 ,91 1.74 2.40 2.52 20.00 Septic Tank Effluent, in, 1.19 1.19 1.19 1,19 1.19 1.19 1,19 1.19 1.19 1,19 1.19 1,19 14.28 Potential Evapotranspira- tion, in. 0 0 0.61 1,71 3.14 4.38 5.61 4.78 3.15 1,67 0,46 0 25,51 Actual Evapo- transpiration, in• 0 0 0.61 1.11 3,14 4.10 3.55 2,85 2,26 1.67 0.46 0 20.35 Moisture ~ Deficit, in. 0 0 0 0 0 0 0.28 2,06 1,93 0.89 0 0 5.16 aN 00-' Soil Moisture Storage, in, 5.00 5.00 5.00 5.00 4,88 3.41 1.55 0.85 0,69 1.95 5,00 5.00 - Snow Pack Moi sture Storage, in. 3,15 0 0 0 0 0 0 0 0 0 0 0 3.15 Total Percolation, in. 4.34 3.23 2.28 0,58 0 0 0 0 0 0 0.08 3.71 14.22 Source: U.S. Army Corps of Engineers Study . • • ~ ~ • • f • • • • ~ in coooeration with the U.S.G.S., U.S. Environmental Protection Agency and the 4Vashington State Department of Ecology, have provided some positive indications that the aquifer is in fact recharqed by water applied to the ~ area overlying the aquifer. This data'would indicate that sewage treatment system effluents discharged'to sub-surface drainfields is a source of qround water recharge. Tlie preliminary data shows a definite stratification of pollutants in the ground water at certain times of the year. This is a fac- tor which Todd, in the U.S. Corps of Engineers stud_y, considered important in identifyinq drainfield percolate as a source of qround water recharge. ~ Todd also used data indicating an increase in total dissolved soiids as the ground water flows westward under the areas served by septic tanks as confirmation of his calculati-ons showing recharge as probable. The preliminary data from the Spokane County "208" Study and the U.S.G.S. does show a moderate increase in salt content of tfie ground water as it passes under the Spokane Valley. However, a much larger increase in salt content appears to occur as the aquifer passes under ttie City of Spokane and the area to ttie north. Crosby has suggested ~ that the increase in ni'trate and chloride levels as tlie aquifer flows westerly is due to "natural hydrogeological processes and not to seepage from septic tanks".17 Preliminary data also indicates that some areas near the margin of the aquifer, and the project site in particular, have higher salt concentrations ~ than does the main body of the aquifer. Because of the lower flow rates and lack of mixing near the margin the effect of surface recharge on ground water qual i ty may be more eas i-ly i denti fi ed. The hi gher sal t concentrati ons near the margin may be the result of surface runoff from the adjoining hills and/ or surface recharge from the area above the aquifer. ~ Water Use " Estimated volumes of water pumped from the aq uifer in 1976 by public water supply for domestic, irrigation and industrial purposes are shown on the following figure. These es1t~imates are derived from the U.S.G.S. suminary ~ of data from previous studies.. Public water supply systems pumped a total of about 30 billion gallons (128 cfs) of water from the aquifer in 1976 for domestic use. The major part of the water (about 27.5 billion gallons) was pumped in Washington. Al1 publicly supplied water used for domestic purposes by the population over- 4 lying the aquifer was obtained from the aquifer, except for a very small por- tion (less than one percent of the total domestic use) which was obtained from Hayden Lake, Idaho. We11s are presently being constructed which will replace this surface water supply with additional withdrawals from the aquifer. The major public water supply systems are listed in the attached table. ~ An additional 22 billion gallons (92 cfs) of water was pumped from the aquifer in 1976 for irrigation"and almost five billion gallons (19 cfs) for industrial uses. Diverted from the Spokane River in 1976 were about 24 billion gallons (100 cfs) for irrigation (near Post Falls, Idaho) and 10 billion gallons (42 cfs) for industrial use (Kaiser-Trentwood cooling processes). Virtually all the water diverted by Kaiser-Trentwood • is returned directly to the river. 72 • 189 ~ Suncm ry of pUblic vater-eupply 9yateim obtaining watcr from thr aquifer wacer quelicy Lccetion Approx- Approx- Nuar 3 Preeent of imnte imate ber Cheoicel etartdarda watcr t7ame of vater systeml wella popu- vatez use of Startdnrdo Number tzeac- • lation in 1976 samplee excaoded of inent eerved (milliona tastad2 timfla in 1976 of oxceeded gallona) City of Spokene 25/42-3 180,000 19,800 35 Iron 1 Chlori- 25/43-4,8,11 nataon 26/43-31 Mndern E1ectzic Siater Company 25/44•8,14,16, 25,300 1,760 51 Zron 6 • 17,21,22, 27 Kanqaneae 1 None Diseolved eolid• 1 Cicy of Caeur d' Alene 51/4-1,3,12 21,000 1.400 Chlori- natlon bfnitworch Watrr Uistrict M2 26/43-7,19,20, 14,000 979 1' Izon 1 None 30 Fairchild Air °orce Bner 25/42-11 14,000 727 61 Iron 1 Chlori- nacion Vara Irrigation District 015 25/44-13,15,22, 11,000 590 37 Izon 2 23,26 Nitzata 2 None waehinqtan Nater Power µ2 25/44-20,27,26, 7,400 590 20 Iron 3 : 29 Copper 1 Chlori- Lead 1 nation washinqton itater Povcr A1 25/43-13,23 4,800 343 SO Iron S Chlori- - 25/a4-7,18 Phenola 1 natien Model Irrigation Diatriet 910 25/44-21, 28 4,600 82 5 Iron 1 None ' City oE Fo9c Falln 50/5-1 4,500 431 None Waehingcnt, t:aLQr P.swer q3A 26/43-19, 20, 30 4,500 273 9 Izon i Chlori- nation Orchard Avunutl Irrigscion Diacrict :5/43-12 4,500 102 24 Manqaneae 2 #6 2',j34-7 Phonole 1 None CarNiopa Irrigation Uistrict 47 25/43-23 4,200 206 1 None 0 None • Trentwood Irrigation Distr:c: 113 25/44-2,3 3,600 427 8 Iton 1 None 26/44-34 North Spokane 3rriqation District 26/43-27,28 2,800 174 S None 0 None k8 Ca st Spokane ►teter llibtrict #11 25/43-24 2,800 161 22 Iron 5 None Coneolidaced Irrigation Diacrict 25/45-17 2,700 134 2 None 0 None 019 (Gceenacrey) ltsahinqton WFater Pover q3B 26/43-8,10 2,400 202 6 Izon 1 . Manganeee 1 None - . Roae Point Aaaociation 51/5-35,36 2,200 150 None ~ Flutcnanaon Irrigaelon Diytriet +►lb 25/44-18 2,000 181 3 None 0 Nene Conaolidated Zrr:gataun Diatrict 25/45-18 2,000 100 19 iron 1 None N19 (Corbin) Panadrna Park Irzigation District 25/30-5,6 2,000 32 2 None 0 None 1l17 Zrvin water Distzict qb 25/44-4,9 1,800 606 5 None 0 None Twn of Itillwood 25/44-5,7,8 1,800 36 4 None 0 None Conaolidaced Irr:qaCion Dletrict 26/46-31 1,500 72 18 Ison 2 a19 (eaet Parm9) Manqaneae 1 None Coneulidatud Izriybt un uiacrict 25/45-2 1,300 65 2 None 0 None 419 (Otia Ozcharda) • Cicy oE Rachdtwo 52/4-31 1,000 161 Nitsate 2 None Pine villa EetocQA 50/4-6 1,000 60 None Diahman rbter Company 25/44-19 1,000 26 2 None 0 None Consolidated Irziyaca.n D_acrict 25/45-7 870 43 2 Iron 1 None qlb (Wnac Parrzu) City oc Sptric l.akv 53/4-6 700 50 None Eaot Gzeenacrea 51/5-28 600 38 None tiauyar Lake 51/5-19 600 40 None Con:,ulidateJ irrigation uieLricc 25/44-11 510 25 2 None 0 None #15 (Carder) Cicy of Athnl 53/3-9 330 50 None . Hoffm,n tPater • 50/4-1 300 20 • None Fie;•drn @ines 51/4-23 25~ 1S done LiL,.~rLy Lakte Utiliciea Co. 25/45-14,15 24U 13 17 Iroo 2 None Pina View Entatass 51/4-12 200 , 13 None Nornia Trailer Courc 51/4-23 150 10 None . Mc+ab Irrigatiw+ Dietrict 020 26/45-25 140 7 4 2zon 1 None Panhandle MoDile Eetatea 52/4-22 125 8 None Nwntain Vlew 51/4-14 125 8 None Sun Air Mobile 91/4-11 100 7 None Country Livinq 52/4-27 100 7 None . Heutter 50/4-4 100 7 None Aivilla Nator Corporation 26/43-6 97 6 4 None 0 None Hoxard ttater ' 52/4-5 50 2 None evnco Road water 53/2-17 40 2 None Pleasant Prairie xater Company 26/44-32 34 ' S 2 Nitrate 1 None Pinecroft Mobile Home Pack 25/44-9 Chlori- nation Hidden Village £states 52/4-22 None Uoper Twin Lakea 53/5-36 None ':ne-ald Estatea 51/0-12 Subdivieion not yet eompleted vone Carnvelle Corporation 51/4-21 Subdivision not yet completed flone • 1 A few additiortal emall syetems probably exi4* rhat are not ineluded in the baaic data- 2 Data not aveilable Eoz Idaho. 3 Chernical standarda are explained on plate 10. . • 73 190 ~ b. The Probable Impact of the Proposed Action ~ Assuming an annual use of 35,000 cubic feet per residential unit, the proposed project would result in the withdrawal of about 14.9 million cubic feet (.5 cfs) of water annually from the aquifer for domestic, sewage disposal and irrigation purposes. Of this total approximately 6.2 million cubic feet per year (.2 cfs) would be used for sewage disposal and ultimately discharged ~ to a drainfield above the aquifer. The later total was derived assuming 3.2 persons per residential unit at a consumption rate of 300 gallons per day per residential unit for sewage disposal. The anticipated water consumption by this project represents a very small percentage of the total flow from the aquifer and poses no threat to * existing supplies. The present ground water flow is capable of serving more than double the population now being served. A portion of the above water consumption may be available for recharge to the ground water system. Using a consumptive use factor of .59, as developed by Todd, 41 percent of the total water consumed would be available ~ for percolation into the ground water system. This would represent a total of 6.1 million cubic feet per year (.2 cfs), of which 2.5 million cubic feet per year (.08 cfs) would be from sewage disposal systems. If this entire amount of water were to percolate into the ground water it would represent less than one-tenth of one percent of the total flow of the aquifer. ~ It is not anticipated, based on the above, that the proposed project will have any perceptible effect on the quantity of ground water. The pos- sibility of ground water quality degradation as the result of percolation of sewage treatment system effluent is discussed in the sections on ground water qualit.y and sewaqe treatment. Because of the location of the project site over a Qortion of the a-~Tuifer ~ where flow rates are presummed to be low the potential impact on qround- water quality from project related effluents may be more significant, as the percolate would not be mixed and diluted to the extent that it would be in the main body of the aquifer. It is not anticipated, based on the above, that the proposed project ~ will have any perceptible effect on the quantity of ground water. The pos- sibility of ground water quality degradation as the result of percolation of sewage treatment system effluent is discussed in the sections on ground water quality and seaiage treatment. c. Measures to Mitigate Adverse Impacts ~ None. d. Unavoidable Adverse Impacts None. ~ 74 ~ 191 3.8 GY'aurtd Wdter Qual ity a. Ex1 S t311g C0nd7 t7 of1S ~ Pursuarat tv section 1424(e) of tfie Safe Drinksng Water Act 19 the _ Federal- Enviranmental ProtectTOn Agency (EPA) has designated the 5pokarre- Rathdrurn aquifer as the soTe or principal source of drinking water for approximately 338,000 peaple in a portTon of narthern I'daha and eastern Washington. The designated "sole ~ource" area includes the aquifer recharge and streamflow areas shown abovee The sal e saurce desigrrat7 on ~~r the ~ aqui fer was based upon the ~Fal lowi ng determi-nati~ans by the EP~4. 7, The Spakane Valley-Rathdrum Prairie Aq;uifer is the tisole saurce" of hTgh qu.alfty dri nking water- for aver 338,000 people including cities arad towns and people using individuaT wells. Current water supply treatment ~ practice is 1 imited to mi nimal disi nfecti on fvr some systems and no treatment for other systems for dri nking purposes, and there i s no a1 ternat-i ve saurce of dri nki ng water supply whi ch coul d economica1ly repl ace the 5pokane 1fa1ley-Rathdrum PrairTe Aquifer. 2. The Aqu ifer i svu 1 nerab7 e to cantami nation through # Tts recharge zone primarf 1 y because the gl actated soi ~ whi ch are highl,y pemeable. There i s evidence af 7 a- ca l i zed contamfnati on from i ndustr°ial. sources and septi c I, tanks.Si nce contamination of a ground water aqu7 fer ' can be difficult or~ impossTble t❑ reverse, contamirration of the Spokane 11a7 ]ey-Rathdrum Prai ri e Aquifer could pose ~ a significant hazard to those people-dependent vn the aquifer for drinking purposes. The svle saurce designativn require projects which rece~ve Federal fi nancial assistance and have a potentiat far pallutirtg the aguifer be subject to aspecial EPA pre-construction review. The 6asTS for the review is whether or not the risk of contaminativn of the aquifer created by the propased2 Frioject is sufficient to create a"significant hazard ta public heal th" , Water Qual i ty Standards Federal standards for drinking water qual ity have been esta,bli shed ~ by the EPA. The fol 1owing tabl eshows the maximum al lowabl e contaminant Zevel (primary stqndard) and the proposed secondary standard for each pa- tential water quality contaminant. The primar,y standard establ ishes the maximum a17 owable cantamTnant 1 evel for chemi caY constituents af dri nking water whz ch may affect the health of cansumers. The secvndar.y sta ndards ~ are anly guideTines and deal with the aesthetic qualities of drinking water. The i norganiccvnstituent of primary cancern T n the aqui fer i s ni trates. Excessive cvncentrati ons of ni trate in drTnking water produce a bi tter taste and may cause physioTogical distress. The nitrate ion has also been impi icated in the occurrence ofm~themglabi-nernia (i.e., "81ue Baby" syndrome). ~ Neavy metal such as Tead, capper, mercury and cadmium can be toxic in excessive concentrations. ~ ~ WATER QUALITY STANDARDS Chemical Standards Maximum Proposed Constituent . Contaminqnt Seconda~y Level' Level ~ Iron 0.3 mg/L Manganese 0.05 mg/L Sulfate 250 mg/L Chloride 250 mg/L a Fluoride 2.0 mg/L Nitrate 10. mg/L Total dissolved solids 500 mg/L PH <6.5 or >8.5 Color 15 platinum cobalt units Turbidity 1 to 5 JTU Foaming Agents (detergents) 0.5 mg/L ~ Arseni c 0.05 mg/L Barium 1. mg/L Cadmium 0.010 mg/L Chromium 0.05 mg/L ~ Copper 1 mg/L Lead 0.05 mg/L Mercury 0.002 mg/L Selenium 0.01 mg/L ~ Silver 0.05 mg/L Zinc 5 mg/L Endrin 0.0002 mg/L Lindane _ 0.004 mg/L ~ Toxaphene 0.005 mg/L Phenols3 0.001 mg/L 1 National Interim Primary Drinking Water Regulations (U.S. Environmental Pro- ~ tection Agency, 1975). Primary regulations are those which deal with constituents that may affect the health of consumers. 2PJational Proposed Secondary Water Regulations (U.S. Environmental Protection Agency, 1977). Secondary regulations are those which deal with the esthetic - qualities of drinking water. These are guidelines only. ~ 3Chemicai standards for phenols are not included in the primary or secondary regulations. Because of the frequent use of phenol by industries situated above the aquifer, the available phenol data is included and referenced to the Public Health Service (1962) recommended limit of 0.001 mg/L. Source: United States Geological Survey. • 76 193 ~ Physical and Inorganic Chemi'ral Characteristics The avai 1 abl e water qual i,ty data i ndi cate that the aqu i fer general 1y • yields viater of excellent quality. A summary of the chemical quality of the water from the aquifer ts included in the f ollowing table. Only those constituents for which a federal primary or secondary standard have been established are included in the table. This tahle represents a summary of about 9,600 analyses from 400 ground water sites located throughout the . aquifer. • (1) Contami,nant Level s i n Excess of Drtnki ng 4Jater Standards The maximum contaminant level of five of the eleven characteristics for which a primary water quality standard has been established (those that may affect the health of consumers) fiave been exceeded in a small number of samples from the aquifer. The maximum contaminant level of barium, cadmium, ~ • mercury, seleniun, chromium and si'lver were never exceeded. Flouride, nitrate, turbidity, arseni,c and lead maximum contaminant levels were exceeded in a total of 16 analyses, which constitutes less than one-half of one percent of the analyses for these constituents. The recommended levels of 8 of the 10 characteristics included in the ~ proposed secondary levels, which deal wi'th tliose characteristics that may affect the aesthetic quality of water, have been exceeded in a small number of samples from the aquifer. The recommended levels of sulfate and foaming agents (detergents) were never exceeded. The recommended levels of manganese, chloride, total dissolved solids, pH, color, copper, and zinc were exceeded in less than two percent of the samples. Iron exceeded the recommended ~ level in almost eight percent of the samples tested. Proposed secondary levels were exceeded a total of 87 times (1.4 percent), from a total of more than 6,300 tests. The fol l owi ng tabl e 1 i-sts the ground water si tes where the primary or oroposed secondary drinking water standards have been exceeded. Five of the ~ sites where dri,nking water standards have been exceeded are located in the general vicinity of the proposed project site. as shown in the following figure. At site 25/44-26L1 (Vera No. 4), which is located 112 mile north and 1-1/2 mile east of the project site, the standard f or nitrate, flouride and manganese were each exceeded once. At site 25/44-29A1, Washington lJater Power No. 2-4, which is located a bout one mile north and 1-112 miles west ~ of the project site, the standard fo r copper and lead were each exceeded once and the standard for iron was exceeded twice. At three other sites (25/44-27E1, -27L1 and -28L1), located within about 1-1/2 mile of the project site the standard for iron was exceeded a total of three times. The iron standard is a prooosed secondary standard set to deal with those characteristics which may affect the aesthetic quality of water. As dis- ~ cussed above, iron in high concentrations in drinking water has a tendency to discolor the water and cause a staining of porcelain. Occasional vio- lations of the iron standard occur throughout the aquifer and the magnitude and frequency of violation in the vicinity of the project site are not unusual. . • 77 • 194 • ~ ~ Summary of ground-water-quality data Chemical standards Number Number Maximum Proposed Number Number Maximum of of contam- secondasy of sites of value Constituentl sites sample:j inant level exceeding samples observed ' . tested tested level2 (EPA chemical exceeding . (EPA 1977) standard chemical 1975) standard Iron 212 758 0.3 mg/Y. 40 58 78 mg/L Manqanese 200 700 0.05 mg/L 12 12 1.6 mg/L ~ 3ulfate 168 596 250 mg/L 0 0 210 mg/L Chloride 364 1,115 250 mg/L 1 4 >1,000 mg/Y. Fluoride4 210 706 2.0 mg/Y, 2 2 3.2 mg/L Nitrate 247 940 10. mg/L 6 11 28 mg/L Total dissolved • solids 364 1,087 500 mg/L 3 3 539 mg/L pH 229 918 <6.5 or >8.5 3 3 Range 6.2 to 9.4 Color 128 484 15 platinum 5 5 21 units cobalt units Turbidity5 139 462 o-'l to 5 JTU 1 1 10 J'!'U i Foaming Agents (deteccjents) 25 77 0.5 mq/L 0 0 0.1 mg/L Arsenic 89 185 0.05 mg/L 1 1 0.064 mg/L Barium 3 3 1. mg/Y. 0 0 0.070 mg/L Cadmium 112 336 0.010 mg/L 0 0 0.006 mg/L ~ Chramium 93 186 0.05 mg/Y. 0 0 0.03 mg/L Copper 97 210 1 mg/L 1 1 5.2 mg/L Lead 110 235 0.05 mg/L 1 1 0.42 mg/L Mercury 99 196 0.002 mg/'L 0 0 0.0002 mg/L Selenium 3 3 0.01 mg/L 0 0 <0.010 mg/L ' Silver 3 3 0.05 mg/T, 0 0 <0.005 mg/L 2inc 97 395 5 mg/L 1 1 7.5 mg/L Endrin6 17 17 0.0002 mg/L 0 0 <0.002 mg/L • Lindane 17 17 0.004 mg/L 0 0 <0.001 mg/L Toxaphene6 1; 17 0.005 mg/L 1 1 0.060 mg/L ' Phenols7 24 77 0.00 mg/L 16 18 15 mg/L ' Source: U.S.G.S. ~ 78 195 ~ Recorda nP lvCat,ians whare Cprlstitueneq .in gxol1Ad-vrater earnpLas haue exCeeded cbnmiCal staitidarda ~ CnnsCituanC SiCe Data SitQ pate Site Bata number aamplad Valua riNmbsr aamplad Valve numher earnpied Value Iton 25/42-llM1 11-Z2-55 0.58 cnq/3. 25/44=15E2 5-17-79 1.1 rvylL 25J45-14FY 4-29-69 1.1 mg/I. 25/43-23A-1 5-07-74 .43 12-14-71 .32 -24F3 10-27-61 1.2 12-13-71 132 •17rt1 7-42-75 .40 4-29-64 .61 1a18-72 .44 -27eI 7•17•77 .48 -15CY 5-07-75 .35 ~ 7-24-72 .-74 ~-37LI 5-11-74 1.4 -34L1 4-27-71 1.0 9=14-72 .70 -213L1 5-14-71 .34 -36N1 6-29-73 2.4 =2441 5-13-70 =62 -29r4Y 2•14-72 .42 9-~6-73 .38 12,31=71 .34 3-31-72 .36 12=18-73 1.5 6-13•72 .36 25{45-3k3 4-27-71 .90 . 26/45-I1M1 5•14-10 «42 -74L1 2-14-72 .38 -1°P1 12-13-71 .34 13-14-71 .40 ` 3--31-73 ,46 -1tRi 7=14-72 .3a 50/4-3AAD1 6-23-76 79 25/44-3131 10-09-75 .18 8-14-72 .32 54/5-4EB111 3-14-76 6.$ -$Nl 5-13-70 .413 -LEGt1 7-24-72 ,89 4-29-15 .79 -9J2 4-16-7L .38 26/42-12L1 5-12-54 .32 6-14-76 16 -11$ 4-15-71 2.0 5-15-75 .32 51/5-29CRtk1 5- -76 .64 ~ -I2AY 5-01-75 .31 26/43-6q15 10-iji-72 .44 C,- -76 .58 -12D 5-01-75 .32 -6R33 10-19-72 .34 -31aaC1 6-23-76 3.6 -13111 5-15-70 .44 -19AY 7•09=75 .34 -33BCD1 9-2$-76 1,3 •15El 2-16-72 .32 -30F1 9-30-70 AD 53/2-31&AC1 10- =76 .70 -31A1 5-28-75 .31 tlanganeae 25/42•1161 3-20-74 0.14 mg1'L 25I44-7C1 5-14-70 u_057 mg/E+ 28/43-984 5-12=64 0.46 rwl/L 35/43-12H1 6-19-73 .30 -15E1 7-02-75 ,06D 26/46-31t11 5•14-70 .060 25/44-1J1 11-45-75 1.5 -26LY 5-~2-72 .460 56/4-3AAR1 5-33-76 1.4 -(.f►I 10-14-72 .a52 26l42 •12L1 5-19-75 .Obfl 5•4/1-34 5-06-74 .21 ~ ChLaYide 26/43-34FI 5-24-55 378 mglL t 5-25-55 470 6-x3-5s 7aV 6-24-55 111.000 ' PLuoride 25/45..25L3 12=13-71 2.7 my/L 57l4-2CnC 3-07-74 3.2 rnq/L NLtrate 25/44=26L1 1,1-04-70 1$ mg/L 52J4-31CJiB1 7- -75 26 rnq/L 54/2-74GC1 aU- =-25 ioyfY. {as N) 2-14•72 11 52{5-25A['l7L 7- -75 28 3- -75 12 26/44=32Q1 9-27-71 11 54/2-34CJtiCl 0- -75 23 8= -76 11 ~ 51/4-3568A1 10- -76 11 +1~ -75 10 Total 25/44-2{}1 6-10-74 537 ngl'Y. 25/44-17RI G-06-74 539 FcJJL. 53/4-77DAG.1 C- =75 5DB rtglk. diaeolved ealidsi Pit 25/43-24G1 5-13-70 8.9 unita 25/45-14N1 iq-2.:-59 9.3 unit,s 26!43-20.T2 12-16-62 9.0 unit9 cOlor~ 25/44-4,71 5-04-7,1 Zl aCCt1 25}44-BOl 4-19-71 17 PCt3 2614 4•32 R1 5 -p5 -71 24 PC1 SRl 5-L4=71 20 -18,7i 5-10-71 16 'lLirhid#Cy~ 26/43-5015 1-17-71 14 JTU ~ Arsenia 26f43•7a,15 9-:2fi-73 0.44d righ. Capp-es 25J44-29AI 5-14-72 5.2 mg/L Le3d 25/44-25A1 9'14-72 0,47 mqlk. 21rv-- 52/4=17,keCl a- -75 7.5 rdg/L Tox,agheae 2 5t42 -1 2751s 9-25=73 0.060 mg/L ~ Phenals " ~;'4 3-141(] 6-27=73 4.002 mq/T. Z5J44-1901 Li-26-73 0.002 tfg/L 26/4~-]7N1 5-39-73 4.012 tmq/1. 25/44-1JY 11-17-75 15 25('45-dC3 6-06-74 .042 26J'43=5L1S 6-29-73 .002 -2fl1 6-27-73 .007 -I SG] •r•25-73 .004 -7813 6-29-73 .p04 6•10-74 .04Z 26/42-11J1;; 6-37-33 .OQS -L6P 4-10-74 .002 -7C1 9$25=73 ,092 -11AkS 6-23-73 .003 36/45-35Fl, 6•28-73 .flOA -lana 6-21-73 .aax 1-26-73 .004 -3501 9-26-73 .o02 1 PL.V ° platinum-eaisalt urii,Ca ~ ,Pl'l3 - Jackaon turbidi[y unit9 ~ ~ ' SoLlY`Ce: U.S.G.S. . 79 196 ~°r + u7FLIAaLI., a~* 1: N03 I CLR qg -fe i ,p ~viuna~v~', M n i iV kDR v TRI: 47'W001) . zv ~ wi wriAN LAF.F. VtDA E Ir 50 tA -~O .4 I?IvE ~ CLR 48 Mn $ , .,_auI +OL~R TDS ~ PN j o)u PN a 51 PN C R~~, , ~e Fe - ~ H Fe ~y 52 UPNIVFRI Q~ . 5i, @ 90 ~ Fe 0 47 ~ Teiwi e~I}~,~ pN i c, y y a 4 , u PN ` 0 .Ml"DWAI' AYI: ~ SPO AN~ ' p CLR ` Fe n Fe SPRnCI~:~YIi SPNnGUEA\'i SPNnGUCAVC koOC) ~ 90 ! ~ Fe DISHIIA\ or~'OR1'UNIT1- v,:kA„A~.~; v o Fe PN o ' P~. ~ x 0 J I ~ ~.rci vu : s G F IkAAre i ; a v 5. Fe 1YIIJtC 9~IM 411.IIIIr 1IIC C , J~ Fe anJ UMaimm nnmUei O o I)IhASY ( f~ ~ ~ 7 c w \ u'~ IwaIwnm xhrroyiuunJwaln F y ~ ~0 CL4 I a ~ hC ywliiy huc%cewdeJ chcmic:A w I•~ ~ PL m Fe almJuJsilleasiuatt w , N f4n < I I'c • Irun r Fe CLkNROSG a~ Fe F i~•ci~buui~• 294h Are 3_aJ Av -I•IuunJr i ~~~~~Ave Np3 *10,,,,,.ic 'fW lumlJiwdvLd"Lls GNOUND 4Y,ITI:R QUALffY S'I'AN11Af2US "o VIOLATION SITES ~ ~~y~~~~~~N co•ay,per t j HI•LI~II I ~ ~ ' .J Ylil9rcn~aa J ~ N J J ~ 41iAAre 1 44ihAVC w WALE ~w.~iWn .n..w+d nJ.• ~f+n`t 1. 11.S.l1~.J SOU~Zl~1,~ 1,I. ~ Of the remai ning vial ati ons of dri nking water standards that have occurred in the vi•ci-nity of the prnject site, several are suspected to be the result of analyti-cal errar or corrtaminat-i-on ❑f the sample. Because ~ of the 7arge number of anal.yses and because the data were obtained from a wide vari'ety of sources representing dT,fferent_sarnpling techniques, anal,yt~cal methods and data reporting practices, the possibilit.y exists that zriaccurate data is zncluded i-n the tabulations incZuded above and elsewhere in this report, The USGS has speci-fically indicated 7n its recent report on the aqui fer that the vioi ati'on af the flvuri de standard reported ~ at site 25/44-26LI (Vera No. 4) and tlie hi-gh lead and copper concentrativns reported at site 25/44--29AT {IdWP 2-4~gay be znaccurate due ta analytical error or cvntaminatzon of the sample. Rile not mentioned by the lJSGS the' rep4rted nitrate 1 eveT i nexcess of the standard at si te 25/44--26L1 (Vera Fdo. 4) also appears suspect. This we11 was tested for nitrate 17 times between 1970 and 1914. Of these tests, 15 shawed val ues af ni trate ~ of 2,9 mgJ7 0r less, ane showed 3.7 mg/-I and ane shawed 11 mgll exceeding the maximum contaminant leve7 of 10 mg/l, Because it is incompatable wi th the repiaining data, the extreme value may represent anal.yticart errar or coTl~am7 nat1 Qn 4~ thE Sdmple. (2) Hi stori caT Water Qual i•ty Trends Atabul ati orr af data fram 11 ground water sf tes T acated in the general vicin7ty of the project sfte are i'ncluded in Appertdix Bto this report. This tabu7atian incTudes alT atrai-laale data an the chemical quality of the water from these si tes, Sample resul ts fram the Spokane County "208" Water Quality Management Program througfr - June _ of 1978 are included as ~ _ i s data through Qecember 1977 fram the on-go3ng lJSGS sampl ing nrogram. aetaTl ed comparison of thi sdata from one time ta another may be misl eading because of changes in samp7 ing and ana7ytical methods over thg years have generally improved the accuracy af the result. Data reported }arior tn 1970 is of less value than that reported subsequent. The data considered most re] i abl e are the "208" study results reparted by the 1aboratory at ~ Washingtorr 5tate Urri-versity and the resul ts of the on-goi ng USGS monitori ng program. The "=208" stUdy reported "fi el d data" is 1 ess rel iabl e because ' 1 t i s general l.y the result of less accurate a nd reliabl eanalytica1methvd s. In its interim report the "208" study reports significant deuiations between nitrate T evel s i ndup1 i cate sampl es run at Washington State Universi ty and the field results reported by Spakane County. Stati sti ca1 correlati ans have _beeo developed whi ch makes thi s data useful for comparative Dunposes. ~ The availab] e water qua7 ity data show that wh11 e the concentrati an of any one chemical consti tuent may var,y from sample to sample at a particul ar si te, rta 1 ong term trends of changing vrater qua1 ity are apparent. Alisti ng af historica] ni trate 1 evel s from se7 ected weT lsnear the project site from ~ ahaut 1950 ta present are shvwn in the following table. No trend of changing n itrate ]evels T s apparent fram this data. AsiN 1 ar conc lusian was rea.ched by the IJSGS in its recent report on the a gu3f e r. (3) Water quality Variations 141thirr the Aquifer ~ In general there i s 1 itt7 e change i rr the qual ity of the ground water , from sampling points near the Washington-Idaho State l7ne to the au-t1et spri ngs north af Spvkane except for salt content,24 The availab1 e data indi- CateS thc~~ the?"e iS a CC1Q[~erdte inCY`ea5e 7fl iSdltS COnteflt 7t1 t}1e aqLIifEY' dS 198 0 Historical Nitrate Levels From Sel*ected 4Je11s Near Project Site Total Nitrate, mg/1 ~ Well Site 1938/52~ 1971-722 19773 - WWP 2-4 2.6 2.7 Modern No. 9 1.9 2.5 Vera No. 4 2.8 2.6 ~ WWP 1-4 5.2 Modern No. 1 2.4 1.0 ..9 Vera No. 1 1.5 1.3 ~Weigle and Mundorff ~ 2DSHS 3208 Field data corrected 6y .75.. . it passes from the State 1Tne through the Spokane area. The following table ~ shows a generally increasi°ng concentration of salts at selected cross-sections of the aquifer progressing from east to west. Conductivity, nitrate and chloride concentrations for the various cross-sections of the aquifer based on data from the on-goi-ng USGS s-tudy are shown on the following figure. This data shows-a very slight increase in salt content as the aquifer ~ passes under the Spokane Valley from State line to about Opportunity. Over . this section nitrate levels increased from .9 mg/1 to 1.2 mg/1 while con- ductivity (a general indicator of dissolved solids) increased from 281 to 292 micromhos. From the area near Opportunity to the east city limits of Spokane the quality of the ground water, in terms of salt content, improves somewhat. Over this section conductivity, chloride and sulfate levels all ~ decreased slightly while nitrate levels reniained about constant. The interim report of the "208" t-later Qual ity Planagement Progra m indicates that thi s improvement in ground water quality near the east city limits of Spokane may be due to influence from the Spokane River which discharges to the ground water along the Upriver Dam backwater area.25 The most substantial increase in salt content occurs between the cross-section at Pa rkwater and the one , at the north city limits of Spokane. Over this section conductivity, nitrate chloride and sulfate concentrations all show an increase. Nitrate concen- trations increase from 1.2 to 2.6 mg/1 and chloride levels go to 4.4 from 2.1 mg/1. The ground water quality data from the on-going USGS study of the aquifer ' used to show the variation in qround water quality at selected cross-sections of the aquifer is included in detail in Appendix B to this report. A similar analysis which has been made by the "208" 4Jater Quality P9anagement Program using "208" field data results, which generally confirm the observations made above, is also included in Appendix B. The source of the increase in salt concentrations as the aquif er passes ~ through the Spokane area is undetermined at this tim e. Crosby has noted that some increase in dissolved solids concentrations could be expected due to 82 ~ 199 Variatiori in Ground Water Quaiity at Various Aquifer Crass Sectians Cantaininant State Line Otis Orchards Opportunity Parkwater North City Limit Conduct7vity, micromhos 281 255 292 257 360 Hardness, mgJl as CaCO3 148 143 155 141 204 Chl orade, mgll .92 ,99 2.1 1 .6 4.4 Nitrate, riig/l ;93 1,04 1.2 1 .2 2,6 ~ SuZfate, oDO mgy l 11.8 12.2 12.5 12.4 20,9 , Approxifliate.distanee fran7 State 1 ine, in miles 0 4,0 - 8.0 11.0 17.0 SO«rce: U.S.G.S. monitoring data, 5117 thraugh 12/17, • • 0 • • ~ + ~ ~ ~ ~ ~ • • . l . . ~ / . . ~ ML uDW mc PuM (,U ~ {'aiM WaY 281 Nine N1de hicad haoaRa J .93 I'ive lfila I'rairie , Pleasanl Prsirie .93 ~ I w+tnan. aa ~ 360 $cven hllk ( f ( 4.4 ~ 292 2.6 2,1 ss ~ 0 , ~`.c 1.2 .99 „ 1.04 i 1Y. 1 po~i/ I~IOtEaIIACitS q~mv.~baa ) - ~ D r257 zen z . ~ 1,6 ' H ~ I 1,2 I'asadci a Pyk Trenlwood S r ok ~ ~ I N ~ I^ Uo''^u~ ~ ~1~ O \ ~n oiiS h«nuras o o N0.r ` : I ~ _ _ _ 1 t90 I I sc ~ . , P k e Va I I v~ • O 00 1 _ H'.4'fSIIF4U 1 ¢ c ~ i T I' o ~ • 81aa, Av. 90 rieni I c p • 5014qulNre a UlShlll~ 1 SW.OufAn N Q , a{Ip0tlllllll)r C Q ~ \ I Y d 1'ernclalc ~ Libenyl.ake ( ss~anw Clcnrmc ':~w \A.. ~ ' SYOKnNI,IrTtRNafIONAI SITG ~ I I AIRPf1N'I'I Q~~y i 9p / VA121A1'ION IN GHUUND IYATCR QUALI'1'Y A9' Nlorun Prairie VARIOUS AQUIFER CROSS•SECCIONS ~ / LFCI:NU a Po 245 Caduclivily ~ ; s • 2.2 Chlmida Vlwie AquUaCroaacctim h ~uNE►mr'~ SOURCE: U.S.C.S.I)a1a, Sf71-12/77 \ ` . ~ ~99 / ~ LEf1;N1) 1. Spntonc Hisxr ui Nire Nik FWIa I O L Nll%cniJe SI21c ISrA 9 ML SPuManO PJ1k OI 3. (illffilh $pIIIlp ~ J. N'hilxorth J 3 O S. N'hiiuur~A 5.1 v..M ~ 6. WhillMUrlh 7iy1 NincNlile ~ MC:III uoons aa 7.%i2i►iusPnnp e. K1YY 3-5 Fivc hlilc I'rniric 4'e j Pleasam Praieic 9 WanJmmcrcSprings ~ • ( J / IU.2UkI1J~du~frcnl ~iawlbana Ntl . 11. A4ufi M'.D. $CVCII MllC I I 12. 2fltl IJa6o Bcc6 , 7 u.uuio 10 tp~ N.{JaIwCID ~ , L t~'_•1 i IS.fIUII ~IOf~;:lll t,Cl'CS No ai 16.L'1D 9 1L ' D ~ I Pbiunl Lle RO 'J 7 fqndlAVe L o~ ~ ` ~I ' 29G • P;uadcna Pyk Trentwood ~5 H S o k n „ ~ I ,~,,~r 0' Otis Orchards E • o ( ° : 5e z . ~ blinwoo ? ~a F1:LISFlkLO ~ 5p k eVal 16 / o ~ ~ /1 a eraowar 0.w 90 , I lienl P " c I ~ •so~,w.n.~ ` Dishman ° Sp.que Ara 0 BO ~ y Q Q ~ . 0 Opporiunity b O ~ Vef:l(~:~t ' po \ I d ~ 291111 AH _ ]2nU ~1bCrty ~LC I I p \A.o 1 J SNOKANkIr"fIiNNAT10NAL I Clcnrose 2 v_ _ I Alltl'ORT I4 ~ L.~. • ~ po 1 . bloran Nmirie ~ N b ,.,oH" 1'IIiLD DA,rn ~ o • A1'ERAGCTO'fALNI"fRAl'L',mg/l ~ (lune 1977 - Dcrember 1917) ° a h ~ Ii~n~MlMtr I~UIISU~ Iv ~ • • • ~ A • ~ • • r natural geologic and hydrologiic mechanisms. This would include the possi- bility that some salts may be di,ssolved f rom the soil materials that the aquifer passes through. This explanation is supported by the lack of any a long term trends in water quality noted a6ove. Surface recharge from the hills adjoining the aquifer or from the area above the aquifer is another possible explanation. A review of the data included 1n thfs repo rt indicates that a va riation in water quality exists in tfie area south of Opportuni-ty and in the general ~ vicinity of the project site in comparison to the main body of the aquifer to the north. This area i,s located on the south margin of the aquifer where, as indicated above, the transmissivlty and flow of the aquifer is apparently lower than i,n the main 6ody of the aquifer. Data from three ground water sites Tn thi-s area (25/44-26L1 (Vera No. 4), 25/44-27E1 (Modern Noa 9), and 25/44-29A1 (WPIP 2-4)) which provide the most complete ~ and long term water quality records Tn the area show hTgher chloride and nitrate salt concentrations than the main 6ody of the aquifer. These ground water sites also show higher condactivi'ties (*an indicator of salt concen- tration) than do sites to the north. The following two figur.tes show the somewhat higher nitrate levels found in the general area of the project site conpared to the area to the north. This observation,is noted in the ~ Spokane County "208" Program interim report 26 and is confirmed b.y the preliminary data from the on-going USGS study of the aquifer.27 It is • suggested in the "208" Program interim report that this variation may be due to a combination of ground water recharge from sources above or adjacent to the aquifer in these areas and the lack of mixing due to lower aquifer flow rates near the aquifer margin.28 The preliminary "208" data S results indicate that the aquifer ma_y be relatively staqnant in the vicinity of the project site and that pollutants that reach the groundwater ~ in this area are only partially flushed out. The USGS and the Spokane County "208" Waste Water Management Program in their on-going monitoring program have collected and analyzed a large ~ number of ground water samples from depth selective wells. These wells - allow the collection of ground water samples at various levels below the surface and provide data on the variability of ground water quality with depth. The depth selective samples are collected by the "208" study staff but are analyzed independently by both the"208" program and the USGS. USGS data from 13 depth selective wells are included in Appendix B and includes ~ the results of samples collected from May through December of 1977. Results of the Spokane County "208" depth selective data are also included in Appendix B. The location of the depth selective ground water monitoring . sites are shown on the following figure. , The results of the depth selective sampling durinq the June-December ' , 1977 period indicate that the ground water generally is of uniform quality over depth. Of the 13 monitoring sites only two showed any indication of stratification of contaminants. The most clear cut exception occurred at ~ site 25/44-17R1 (Balfour Park). At this site depth selective samplings were made by the USGS on four separate occasions. The results are shown on the following table. The samples collected on October 10, 1977 indicated de- ~ finite stratification of salt content. Chloride concentrations were found to vary from 6.4 mg/1 near the top to 1.7 mg/1 at depth. The results of 86 ~ 203 uiiii>in %%i ~ N"'u,) \ ~ ' ~~Vµ ~~~~I`1 ~ PHI\'I U UHI1'I I RI_NTWUOD ~ 290 ~ I ~Yµ • _ I ^ V l1\Iv\ LA~I ; 2Qn,r ~trvut x I wIW Aw MII.I.W1OD C ~0 ~~~l~ 13 ~ 1'PHI1'fR! - I z o`. I < ~ PNU~IHI'iY nl'1 < .SpOAAN~ 1.6 o.N (t 1.3 C 1.1 Nry~ SI'It4(.11 1'1 I 1f'N,1Gl'I 1\'I 0 SPN,U"lLA1'I W l ~ C:) v I'0 i y~ DISI111A\ OPPORTUNITI' Vf R:1DAI.F: I s I G ~:Ill r11f i~ x I ' ' = ..7 2 -5 L , n 1711ie1.r ~ Y O Y • ( ,Y B c . C t ` ' ~ ~E ~ i.ecr:no z ' ~ N•~u s~~~ - I fLGNR04L O 32 2.6 a•wwnt~ uJ 4~c tl~ 1lalcin \u y I 311, n„• "208"fIGLDpATd I '///////1/ _ ~.•VHO~Ii.~ I _ AVt:ItAGC• TOTAL NCl'RATIi, mgJl i). aon ii.ifil,t r,ik 'ii.51YC z ~ E-lhdem Nu, I i ~ 5 (lune 1911 • Deceinlier 1977) •~i~iiiiii z F- vera km i ; , c•vcruvat ' II • 211d 1'dky 11w4H1 Nuk V. i.centai v«l,I, - - - J \ idld Are sdlfrun IW. , ^ J71b U laldo . J•«M1%P14 h NQIt: l•ILI.U DAIACONRlI'I'I.U Bl' .75 FnCI I1R a i~P~MINn~..'.~.~..ui1l•' r. ~ .~.u SOURC@: 5pukane Cnunly ,•?OR" Program • • ~ ~ ~ • • ~ . ~ ~ - - so°`~£`' \ U'I;LLI:SI.I:Y AVIi vwkr I ~ . ~ ~ ~~µ~vrµ 13LOpNIVCp DRIV@ TkIiN'fW00U y . :9D ~ I'E Nf.WMnN I.nKL ROrD ~ 0 SPOKqN W I E E RIVER . ~3 a city I:uclfd Avc MI1.1.1V00D ~ f J O i t pti~ R C I ° / ~ ~ •~~~r~^~ : I µn~ic~ Z > J o- - v ~ UPNIVi'R I o O ~ " c a ~ TNCPtI'AVE~ o 1 \ ~ r u ~ u` o I.0(II) I u I 4 f1N0AUWAY AVE ~ u SPO AN~ N si°snruEAve j sPwneueaw: L511) . seax.t E nvr•. • „ . Ln00 DISHDIAN OPNORTUNI'I'Y VGRADALE ~ • o `o ~ i o ~ I?IAAve I 'r 0 25(1) Q C ' Yy 2.6 13)~' a I.F(:F~U o 0 0 umnre I A ~ a 1,9114) a N1uSita e•wiVNta ~ y C ~Q o O y ii • NoJcI No. I W I= ~ I~ m~3.4 (I C•Mhdel Nu. 3 T ~v D• b1uJd Nu l Q 2.8114) I;- IaN'vi2 3.3(I) 4.30) O CI.I:NROSC 0 0 G' H•+IalanNa9 29111 Ave ~ G•1'enNo.J J2nd Arc ~ 1~1Are II•UnJaoNn.l 7 DSIIS DATA I• vcri wti i •iiiiiiiii. 2 AVEIZACCTOTALNITRATC,mgfl '//S ' ITE;// °C < NapitLi orsnmpxs I z (Augiul 1971 • Seplember 197:) m Aver2gaTwaINlinie,mg/l j > (Augusl 197I -SepkmMr 1912) ~ N N SOURCI:: D.S.H.S. ` NthArc * I Atde 111h Are Qe t h ~ ninn~n;I ~~µn4~n ~SI:AI.f ~ • \ . ~ ~95 I I.LI;L'NU . ) ~ . / i ~ 8 ID,\IIII~I'NI-sV I' b iu~,nnci.u. , n,i.5ortkamv,,koi (r` GtMPlll~l.l•IUCI.Iu d C,,,~P ~~.~:,1IssION / e ,,ALIA-V MI„ION o,,KK . • PnNWrv f U,,I.I,IIUKPAIiK • Ninc hfile M eaJ ro,M na J 9 ikwn h MILWAUKI • , Fve M1lile Prairie ~ ~leasanl Pruirie ' CkNfBAl.l'HI: auz i Ptl scr • • 14wl~a~n~ / . i AkI.INl~itl~ Seven hlile 'I L mWIIII„Ow,~I~~~~r . n . y~ • 9p 1to~en Acres G~~c 4o qyunl DlaIfI* RO a • D . 'J F~IMII Fr~ ~ ~ ~1 y C.. ' ' H Pasadena Park Trcntwood p 01Ond I~; Olis Orchards ~r • 0li'' ( O00 14y ( 5 J~~. hi1llW0(1d S, 1 Fk"S JII.LU ' Sp k e VB~~ ~ • g o Pao B~o~owiv nv*~ 90 t 'd~ ' T-nl 1~ . C t9 Su,. p- Av a~ Ill:lll I Sq~9~e Ave I ~N 90 a a • n Upponunity C3 Veraaaie ~ , . o ~ Q n y ¢ Liberly I.ake ( 291n Ar, _ 12na A~~ ^ Gicnrose SPbI:ANkIN'fCNNA fI0VAL 3 ~ p H ~ eieroet --71 SITE ~ LOCATION OF DrN'i'H SFL@CTIVL•' 90 ~ N1oron Pnirie . ~ N z7 CROUNI)WA'PEu Trsr sirrs n I a Qo v p ~ O CruuuJwaler Sampling Si1e q »s EL MIYIYIII YM'u.~~11U ry'Y. °"r~~~'•° I une uiLr:J SOURCE: U.S.G.S. . ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ bJATER QUALITY FROM DEPTH SELECTIVE GROUND WATER SITES Ground Water ldentifier Sampling Sampling Conductivity Dissolved Dissolved Site Number Date Depth (micromhos) Chloride Nitrate (mg/L) (mg/L) ~ 208 Balfour 25/44-17R1 77-05-18 77 - 1.6 1.2 Park 76 - 1.6 1.2 79 - 2.6 1.4 83 - 2.4 1.4 98 - 4.7 1.5 118 - 1.5 1.3 • 77-08-03 70 309 1.7 s67 74 312 1.6 .94 88 310 1.7 1.1 114 360 1.8 1.2 77-08=05 70 258 2.2 l.[ ! 74 249 1.8 1.2 i • 88 254 1.8 1.3 114 256 1.6 1.3 77-10-13 77 375 6.4 - ' 82 350 5.8 - 87 300 3.1 - , 92 275 1.9 _ . ~ 113 250 1.7 - 78-2-16 73 365 18.6 1.9 - 76 330 13.1 - 82 290 7.8 1.5 ; 92 280 5.0 - 113 - 2.1 - . ~ 78-3-27 . 73 295 12.8 2.3 76 295 9.1 - 82 250 3.0 1.6 92 250 2.8 - .112 240 1.9 - 78-5-1 73 300 6.5 1.9 ~ 76 290 5.2 - 82 250 2.2 1.6 .92 250 2.8 - 112 240 1.9 - 78-6-13 73 255 3.4 1.7 76 255 1.8 - ~ 82 250 1.7 1.6 92 250 1.3 1.5 113 250 1.3 - • • 90 207 • i the depth seYective sampling and analysis during the January-June 1978 pe1^i od Shawed Same strati ficat1 Dn of pDl lutantS at d7mOSt eVery moni tori ng ~ site. At any parti cul ar site i t appears that the stratificati on of pal 1utants i s seasonal in nature i ndi cata that recf~arge to the aqui fer i r~ these areas ~occurs sea~sonal 1y. T~i s suypvrts the cvn+cl us i on tnat the qraundwater i s recharged by surface and sub-surface effluents di scharged - over the aquifer. ~ Colifarm Bacteria , A large number of bacteri-olngi-cal tests have been run on ground water sampl es from the aquffer and the resu7 ts are i ncluded inthe fi7 es of the Washington State Department of Soctal and Health 5ervfices and the Spokane County Health Distri ct. No summary of these data is presently avail abl e. No attempt was made to tabulate these data as part of this report because the vast majority of ana7yses refl ect the sanitary condTtions of the we17 s arrod distributivn systems and generall.y are not indicative of the bacterio- logica7 quality of the aqurfer. • Coliform bacteri a have been identifi ed i n water sampl es from the aquifer at a number of si tes. In the past at 1 east four cases of coliform bacteria probl ems have repartedly. occurred. In these a6ove cases, i tis nat known if the observed col iform bacteria were gresent because of cvntarn7natian of • the ground water or hecause of poor we7l construction. A 7 arge number of col iform ~acteria anal.yses have been run as part . of the Spokane County "208" Waste Water Management Program. The resul ts of these colifvrm bacteria analyses have been consistently negative fram a rt Z sampli ng sa tes . ~ b. The P'robableImpact ❑f the Proposed Acti,on The develapment of the propased r-estdentiaT developmertt project impacts on grvund water qua7 i ty ma,y resu 1 t from the fol lowi ng sources: (1) waste water collectian, treatment and dTsposal facilities; (2) starm water drainage' - (3) sa1 Td waste disposal methods; C4) chemi caT transport storage and use; and ~ (5) disruption and coverTng of saiZ due to canstructivra activities. Percolate ailutian - As noted above the Spokane-Rathdrum aquifer is a very d,ynamic ground ~ water system. It has an estimated average flaw,rate of 1320 CFS and moves at an average velocity of about 100 feet per day. Yhe potential recharge of the aquifer that would occur fram vraste water disposal drainf7elds and prec7pitativn over the aquifer is a very small pgrcentage of the tata7 aquifer flow as noted in the previaus sectTon. Arty cantaminants that are carried ta the ground water b,y percolatian of these waters wou1d be subject ~ to substantial dil'utzon. First, drainfield effluent waters wauld be diluted ~ 91 . 208 ~ by the relatively pure water appl ied to the surface area above the aquifer by precipitation and domesti-c irrigation. Todd in his study of the aquifer ~ has estimated that drainfield effluents constitute approximately 12 percent of the total water appl fe~9to the surface area above the aquifer in fully d eveloped suburban areas. Taken over the entire Spokane Valley the per- centage woul d be much 1 ess. The fol 1 owi ng tabl e, adapted from Todd,30 pro- vides a summary of annual water balance and percolate wa ter quality values for the Spokane Valley under su6urban development conditions for the year 1975 and for the year 2020, assumi-ng a population increase of 54 percent ~ during that period. ThTS analysrs TndTCates the substantial dillution of drainfield effluent that takes place, as the estimated total dissolved solids content of the percolate i's 302 mg/l, a value substantially below . the spring water standard of 500 mg/1. A similar analysis fo r the year • 2020, assuming a 54 percent i-ncrease in population (and drainfield effluent) indicated that the quality of the percolate water will remain almost un- • changed. Todd, in his analysis of the aquifer comes to the following conclusion: The analytical results of the forecast impact at year 2020 when compared with the present impact, both measured in terms of volume of leachate and dissolved solids con- • centration, indicate tFiat the Present impact on ground water quality is already a stgni,ficant proportion of the ultimate level. In addition to this dillution that occurs as the result of percolation of precipitation and irrtgatton water, the entire percolate will be diluted ~ as it reaches the ground water and is mi-xed with the main flow of the aquifer. Because of the hvdroloqv of the apuifer in the vicinitvof the oro,iect site it is probable that less nixinq and dilution occurs in this area than in the main body of the aquifer. The effect of project related effluents on groundwater qualit.y could be more siqnificant in the vicinit.y of the project site than in the main body of tne aquifer. • Waste Water Collection, Treatment'and Disposal The following section on Sewage Treatment discusses the probable en- vironmental impacts from project related waste water collection, treatment and disposal facilities. This includes a discussion of the probable impact on ground water quality. Storm Water Drainage As discussed in other parts of the EIS the surface water runoff f rom the project site will be disposed of on-site through the use of a system ~ of catch basins and dry wells. No provisions are made for the treatment of surface water drainage. It can 6e expected that surface water runoff from the project site will contain minor amounts of some ground water contaminants. These would include suspended solids, petroleum based hydro- carbons, dissolved inorganic salts (for example lawn and garden fertilizers) and herbicides and pesticides used for domestic pu rposes. The majority ~ of the contaminant are subject to substantial removal as the storm water percolates through the soil column above the ground water. Soil systems do . not generally retain anions including nitrate, chloride, sulfate and ~ 92 209 ~ Summary of Annual water- Balance and Percolation Ouality Values for Spokane Val l ey Suburban Condi tions • - 1975 2020 Mean Annual Precipitation, i'n. 19.5 19.5 Septic Tank Effluent, in. 3.95 6.24 ~ Lawn Irrigation, in. 8.05 10.09 Agricultural Irrigation, in. 0.72 0.21 Tota 1 Appl i ed Wa ter, i'n, 32.22 26.14 ~ Percolation, in./yr. 11.11 15.39 _ TDS of Percolation, mg/1 302 304 • Source: Todd, U.S. Army Corps of Engineers. • . • ~ • 93 • 210 ~ bicarbonate. These dissolved inorganic material will move with the percolate waters and may pose potential for ground water contamination. Solid UJaste Disposal ~ As noted in the section on solid waste disposal below, it is estimated that the proposed project will generate approximately 1,100 tons of solid waste per year. Disposal of this solid waste would occur at existing County managed sanitary landfills. The majority would be disposed of at the County landfill at Mica, Washington. It is not anticipated that the solid waste ~ generated by the proposed project would generate any significant or unusual amount of toxic waste. If the proposed setivage treatment facilitY is operated and maintained by Spokane Count.y it is probable that the sludge from the treatment plant will be disposed of at this site. The Mica landfiill site is shown on the following map. It is not located over the aquifer recharge area but is located in the designated streamflow area. This landfill takes ~ place in an abandoned clay open pit mine site. This clay surface around the - landfill forms an impervious surface which provides a barrier to leaching of polluted water from the landfill site. Leachates from this landfill site ° does not pose any threat of ground water contamination. Chemical Storaqe, Transport and Use ~ As indicated elsewhere in the EIS space heating within the proposed project site will be exclusively by natural gas or electricity. It is not anticipated that any on-site storage of fuel oil or petroleum products will occur on the project site. Thus a threat to ground water quality from the accidental spillage or leakage of these materials does not exist. ~ It is anticipated that by its very nature the proposed project would result in the use of fertilizers, pesticides and herbicides for domestic yard and garden use. These materials while potential ground water pollutants, would not be used intensively enough to pose a threat to ground water quality. Proximity to Water Supply 6Jells • The location of water suppl.y wells in the vicinity of the project site are shown on the following map. The water table gradient, in this area as estimated by the USGS, indicates ageneral groundwater flow to the north- west as shown on the map. The preliminar.y results of the "208" study indicate that the hydrology of this area is very complex and that the direction of • flow varys seasonally. There are several weils located in close proximity to . the project site and the proposed drainfield location. Some within 1/4 mile of the drainfield location. Because of the proximity of these wells and the stagnant flow conditions that are indicated in this area the possibility of some significant localized impact on groundwater quality cannot be ruled out. • c. Measures to Mitigate Adverse Impacts The potential impact of this project could be mitigated by reducing the density of the proposed project. This would have the effect of reducing proportionately the level of contaminant that must be controlled, treated and/or disposed of on the surface above the aquifer. Lowering the density of • the project, however, may work against an ultimate solution to the problem of ground tivater contamination from drainfield effluents. Low density develop- ments will be substantially more expensive to sewer if it is determined 94 • 211 ' ,t~~~~ ~ 1\\ ~ I „~~i\i / \ • 151111}I11 1\~~ 1atlr~ ~ , ' L'\ 'll'Of)h \ l I'HI11Il l~NI11 ?90 No\U - ~ ' rriVr.i~ _ • 17p ~8 ~f i • i w~i~a N ! i ~O i r ~ ~ rrHiviR ?SI'~3 0 - - " n IIGI p,1 eo Iz - ' - ° ' ' ~ " ~ / 9~,0 • o ~ ~ - ~ ; n~aui • SPO N~ ~YI111,1'I ~'I ~ ~I'R11,11 1l'I 1PN.i~~ll ~tl \Y DisuMAN ' oPPois'runirv U 25/44 1, ^ ~ 23U1 EHADALE r.,Xn I ' I x I ~ ;514a : . 2 5144 _);11 ~ i•ii~ ~ s ~ " - ?lU . I , . ♦ ?j14a is'4 ^ - ?$f44 ?7L1 ; - I ^ 29A2 ' 'I\1 0 ~ f I , ' ~ • 2Sf4! " Lrcevu 15/44 ?~144 26L1 \WSL ~502RLI '.SNI 0 M'al-Irrcl e"titam I+ltiroAe of aeter • :;,i,l ~ ~1920`ICrdaMowmanxi lrvell.ouiuim inlcirJuvnuhlC. ~...~I•~ ~ ~ (incqllliddirceIN~an(gbiuoJ-tNIFI _ N~GLL LOCA710M1'S UU~1'NSI'RLAN $17`Ciii s ~ no%,. . FNONI 1'It01[CT SI'PI: ~ Ilivli~k•l. al ~i~ iua~ wAau. ~ L~ ` O CuncN 115, CwhigtcJ Swrry esler ktrl4-hurvjliunuellund numbei. ~ 4111, 1~r 11 . 1 ~lil~ ~ lYal~v Supply 1Pr11 ~ - maw ~ 1i tll 50UItl`L•'. U.S.G.S. h ~ ~ . .y.,~.~._._. • . . . . ~ ~ - ~ ..r.. . ,...~.l~ ~ , ~ ~ at the completion of on-going studies that a central sewage treatment facility is needed for the Spokane Valley. Preliminar.y indications are that community collection and treatment of sewage from the valley in some form ~ will be recommended. The Spokane County Commissioners have developed a draft wastewater treatment polic.y that provides for the construction of a sewer intercepter line from the City of Spokane treatment plant alonq Sprague Avenue to Liberty Lake. In order to make sewering of the valley economically feasable it tivill be necessary that hiqher density development in the valley be allowed and encouraqed. A reduction in the density of the 0 project while having short term benefits would make the ultimate sewering of the valley more costly. Continued low density development may make sewering econimically prohibitive. The potential of project related drainfield or surface water effluent contaminating the ground water could be mitigated or prevented by the ~ operation of monitoring wells between the contaminant source and drinking water supply wells. These wells could be used to identify water quality trends or problems at the earliest possible time. d. Unavoidable Adverse Impacts ' The possibTlity that some drainfield o r surface water effluent will reach the water table and carry some contamtnants to the groundwater cannot be ruled out. The extent or magnitude of this contamination is unknown . at this time and is the su 6ject of several on-going studies. The proposed project provides the flexibilTty to meet future waste water treatment needs as they arise. • • • • • ~ 96 • • 213 ~ ! 3. 9 Publ i c Water Suppl i es ~ a. Existing Conditions Sewage Collection, Treatment, and Disposal Facilities In 1976 water was pumped from the aquifer at a rate of about 146 cfs ~ for domestic and industrial uses. After being used, about 64 cfs (44 per- cent) of this water was treated in municipal or industrial sewage treatment plants and then discharged to surface water bodies. Of the remaining 83 cfs,_ about 49 cfs (33 percent of the pumpage) was lost to evapotranspira- tion. (See section on recharge to and discharge from the aquifer.) This r leaves about 34 cfs (23 percent of the pumpage) which returns to the aquifer ~ through an assortment of waste tivater disposal facilities. Interim sewage treatment facilities processed about five of the 34 cfs - ~ of waste water. These interim facilities are generally small systems which collect, treat, and dispose of waste water generated at apartment complexes, shopping areas, mobile home parks, housing developments, educational institu- ' tions, recreational areas, military installations, motels, and hotels. These ~ systems are not considered to be permanent and may be replaced in the future ~ by extensions of existing sewer systems or by more elaborate small systems. ~ The treatment processes utilized at these interim facilities are activated , sludge, both extended aeration and conventional, and stabilization lagoons, some of which are provided with supplemental mechanical aeration (U.S. Army ~ Corps of Enginegrs, 1976). The effluent from these systems is ultimately ~ discharged to drainfields, lagoons, or seepage ditches. . Individual household systems disposed of the remaining 29 cfs - of waste ' water. The three basic methods of individual treatment and disposal employed . in the area overlying the aquifer include cesspools, septic tanks with drain- ` fields, and aerobic treatment units with drainfields. The vast majority of individual systems consist of septic tanks with drainfields (U.S. Army Corps of Engineers, 1976). The-following figure shows the distribution of the various types of waste water treatment systems located above the aquifer in the vicinity of the project site. A total of 76 residential units have been approved and are under con- • struction in the initial phase of the proposed project. Of these 24 units are using septic tanks as on-site sewage disposal systems and the remaining . 52 units are connected to an interim package sewage treatment facility. This : existing plant has a capacity to handle a total of 119 units and employs an activated sludge-extended aeration process. The effluent from the interim sewage treatment facility, as well as the on-site systems, is disposed of in • a subsurface drainfield. The drainfield for the interim sewage treatment facility is located near the southwest corner of the project site as shown on the project site map. b. The Probable Impact of the Proposed Action • As discussed in the section on ground water above, no definitive con- clusions can be reached regarding the possibility of waste water percolation . 97 ~ 214 _ WW CGLr'SLev nve I v,uer 5v . ~ ( , ~ . ~P IYER OpIVk I'kEN ~ i E F, ~ o ~ ~ IV I < ~ u w r A111.I.W0 a 4 ~ q J w~ UPAIVFR 0~ ~ y D W y qqo ~ Q ~ 9p ~ 1'RENf AVF., j ~ tt~~l5 ~ w ~ L a Y u rn-i / rr SPOKAN p D 1.1 GEND ~ SvanGUF.nv / r C, r~ J &,unJary 4durca rcrveJ by wwer g'btcm I f aDAl,li OC) . Intnim v;u^~~{rtrutmeni pWnl / < / ~ NaiAeniil umn seneJ by inJMWual uplic unb, ~ . O / cemywnds. m ucu"c uuimeni wilu Q ~ ry I ° ~ . Ie~r.linJ arslJeniul arem xwe(l by IadivWual feplu / i+uF,s, cmspaiu.tu Snw1+h ircitmenl umtr ? i ,lppnninidiely SU ar morc pcuple ~n Y N ~ . • Inn.ulizrd inJintrul ucti 4rrcd Dy &rlic Unka, « AO $ ~ . ee .potdr,,M ecioBie I'ainieul unip 'E 4 IMIIA11tWI %fCi SCfYd) IlY ]l'pIIC 17RGu CfSSQUfII1, m :3 \ ;uwbic Iic.uinrcni unHi I u iviii or,useti3,se it„ut(Ace »,tc, 4irrmucrio rroria ! GLIiNROSL ' st-wige ii¢olnceal ffcdil,y 31%1 nvc O I.C, wurJ'Alenc l.KW'IimAerludusirxs i IIISTItIUU'I'IONOFIYASTEWATCR SITE;cc Q ~.IOJINI{v1lG1IlYIIIAfIC! a ~ TREA7'M1IENT FACILITIGS I.IIiAyxdf4uccaung%+nl 5.SpulanelaJusifwll4rk I : ~ > 6. KiIYr-'frenlnixd I u ~ 7 1. InbnJ Empirc Haper f.u. s. Mina,'wd J ` 44111 Aee 1% <qlh Ave 9.SrMA2ne Q I Mde 10, KoiscrltcaJ IAixh-jign IGiuuyU Dwdm.Apd SCALE ' t:rnA 9. I.ifik Syulauu liiver) ~ SiAul.x.asQSrllepaulailc ~ • ..n~~,.......~~.~i.. i~, SQUkCE. U.S.C.S. ~ to the ground water. However, the available data does give strong indication ~ of percolation reaching the ground water thus in assessing the nrobable ~ impact of the proposed waste water disposal system the assumption that waste water percolate does reach the aquifer will be made. Effluent Quality The proposed project will result in the disposal of a treated waste ~ water effluent to a subsurface drainfield located above the aquifer. When the project is fully developed it will result in the generation of approxi- mately 6.2 million cubic feet (.2 cfs) of waste water per year. Using a consumptive use factor as developed by Todd, 41 percent of this volume would .be available for percolation into the ground water system. Thus, it is possible that 2.5 million cubic feet per year (.08 cfs) of waste water per- ` colates into the aquifer. The chemical constituents of the treated waste water are potential contaminants of the ground water. A summary of the ef- fluent quality of the proposed extended aeration-activated sludge system ~ compared to the typical effluent quality from individual septic tanks is ~ shown on the following table. In general the effluent quality from the activated sludge systems is improved over the septic tank system. While ~ neither system is effective in removing nutrients (nitrates, phosphates, and other dissolved salts) the activated sludge system is much more effective than septic tanks in removing total suspended solids, biological oxygen ' ' demand and coliform bacteria. Even without disinfecting the effluent, acti- vated sludge systems are more effective in coliform bacteria removal be- cause of the better control of organic solids. ~ a Effluent Treatment in Soil Biosystems i The quality of the potential effluent reaching the aquifer from a sub- ~ surface drainfield will be improved over the quality of the effluent dis- ~ charged to the drainfield because of biochemical treatment mechanisms that ~ occur as the effluent passes through the soil column above the ground water level. The mechanisms by which pollutants are removed from effiuents applie to soil systems are numerous and interdependent. As Spyridakis and Welch note: • ...the overall process...is very complex because of the large number of variables involved. ...The fate of wastewater materials ~ in soils is determined by a large number of processes, including ~ physical retention, absorbtion on solid surfaces, plant and ~ microbial uptake, microbial degradation, volatilization, leaching, ~ chemical breakdown, and precipitation. , ; Most suspended solids are removed from treated effluents before they are applied to subsurface drainfields. This is necessary to reduce or ' eliminate clogging of the soil. Suspended solids which are passed to drain- . fields are primarily fine, organic solids which are removed in the top ~ 99 ; • 216 ~ ( c ESTIMATED EFFLUENT QUALITY~ Incoming Effluent from Treatment Process, mq/L Waste Water Activated Sludge- Septic Tanks ~ Constituent (mq/L) Extended Aeration Total 225 20 50 Suspended Solids BODS 220 15 100 • NH3 as N 25 2 25 Nitrate as N - 28 - Organic N 15 - 5 s Tota1 Nitrogen 40 30 30 Phosphate 10 8 8 . Fecal Coliform 0 (#/ML) 1500-5500 2102 1500-5500 ~Adapted from references 6, 7,and 8 of Appendi-x B. page . • 2Assumes effluent is disinfected. • • • ~ 100 217 ~ several inches of soil by physical filtration or absorption. After removal ~ they are degraded by soil micro-organisms in much the same manner as soluable organics. Under conditions of proper hydraulic and organic loading, soluable organics (BOD) are taken up by soil Micro-organisms and converted to carbon dioxide, water, new cell material and a complex, relatively stable array of ~ organic compounds known as soil humus. Soil systems are also very effective in removing trace metal cations. Trace metals which are of concern include zinc, copper, nickel, cadT~um and 1ead. Mechanisms which have been proposed for tlie removal include: (1) Absorption by silicates at soil particle surfaces through surface ~ absorption, surface complex ion formation, lattice penetration, and ion exchange. (2) Metal fixation and absorption by organic matter. (3) Surface absorption or surface precipitation on carbonates and/or silicates. ~ (4) Precipitation as a discrete oxide or hydroxide. (5) Biological uptake and immobilization. In general, removal efficiency of trace metals may range from 9§3percent to 99 percent depending on the nature and depth of the soil column. As previously noted, traditional secondary treatment systems do not ~ efficiently remove the primary nutrients: phosphorous and nitrogen. Drain- field disposal of treated effluents may provide partial removal of these nutrients and therefore decrease the potential for grou-nd water contamination, or if the percolate eventually reaches surface waters, eutrophication. Phosphate removal is accomplished by physical/chemical retention by ~ soil constituents; as well as uptake by.cover crops, and removal from the site by crop harvest. As organic materials are degraded, complex phosphates are ultimately changed to simple (ortho-) phosphates. Orthophosphates react with the iron, aluminum, and calcium present in nearly all soils to form very insoluable phosphate salts. These reactions may involve cations free in the soil water which results in precipitation or the reaction may occur at • the surface of soil particles which is termed adsoprtion. Physical-chemical removal of phosphates increases as the depth of the soil column increases and as the clay content of the soil increases. Clays are very fine mineral soil particles with very high surface area/voiume ratios. They are thuj 4very reactive. Expected phosphate removal will range from 85 to 99 percent. • Nitrogen removal is somewhat more complex than phosphorous removal and the least understood. Most of the nitrogen in the traditional septic tank effluents is present as ammonium. Activated sludge-extend aeration system effluents, on the other hand, contain primarily nitrate. Nitrate (an anion) is very mobile in percolation waters, while ammonium (a cation) is retained strongly by soil particles. The ammonium ion (NH4+) may be held ~ temporarily by physical/chemical mechanisms similar to those which retain orthophosphate. In alkaline soils a small portion of the ammonium ion will be converted to ammonia (PJH3) which may, in turn, escape as a gas. The re- maining ammonium is readily oxidized to nitrite (PJ02+) and nitrate (Np3+) 101 218 ~ ~ ~ ions by a group of aerobic soil bacteria., These anions, as vrell as the nitrite and nitrate originally present in the irrigated effluent, are not well retained by the soil and move, in solution, with the irrigation waters. They may, however, be removed, in transit, by several mechanisms. Nitrite may be chemically denitrified to gaseous nitrogen (N2) and oxides of nitro- gen (NO ) which subsequently escape to the atmosphere. Secondly, nitrate ~ and nitNte anions may be biologically converted to gaseous nitrogen (N 2) by denitrifying bacteria. These bacteria are anaerobic. Although little information appears to be available on the efficiency of these mechanisms, it is probable that they are only partially effecti've in reducing drainfield nitrogen. This is apparent for a couple of reasons. ~ First, drainfield effluents are injected 14" to 36" below the soil surface. - This places them out of the most biologically active soil horizan, the top soil. Secondly, and probably most importantly, drainfield applications are not carefully controlled and optimal conditions for denitrification are not maintained. ~ Soil systems do not generally retain anions including, in addition to nitrate, chlorides, sulfates and bicarbonates. These dissolved inorganic materials move with the drainage water and may pose a potential for ground water contamination. Bacteria and viruses are removed from the treated effluent as it per- ~ colates through the soil. Natural f.iltration is the primary mechanism of removal. Crosby, in his studies of the aquifer also concludes that the low moisture content of the outwash alluvium provides an environment which is not conducive to the survival of bacterial organisms. Crosby reports that the deepest level of bacterial organism observed was at the 11 foot level below the surface 35 Because of their siie, viruses are generally trans- ~ ported to a greater depth than bacteria. Because the depth to the water• table is greater than 100 feet in most of the aquifer, and in excess of 60 feet in the area of the project site, penetration of bacteria and viruses to the water table is unlikely. In summary, effluent disposal in a subsurface drainfield can be viewed as a method of tertiary treatment (i.e. polishing of secondary effluents ~ by decreasing the concentration of organic contaminants, nutrients, pathogens and heavy metals). Anions, such as nitrate, chlorides, sulfates and bicarbonates are generally not removed in secondary treated effluents and are only partially removed as the waste water passes through the soil column above the ground water table. As such they pose the most significant poten- tial for ground water contamination from the proposed waste water treatment ~ system. Sludge Disposal Sludge from the proposed waste water treatment system must be pumped and disposed of periodically.* This sludge is raw and if not property • ~ 102 219 . ~ handled could pose a public health problem. If the treatment plant is ~ operated by the Count,y of Spokane, the sludqe will be disposed of at-the sani tary l andfi l l at Mi ca, Washi nqton. Odor An activated sludge-extended aeration system may result in obnoxious • odors when not properly operated and maintained. Hovrever, when such systems are designed properly and attention given to important operating and mainte- nance characteristics such systems will operate odor free. Any sewage treat- . ment system can experience odor problems during upset conditions. Odors . from package treatment systems are not an unavoidable adverse impact. • c. Measures to Mitigate Adverse Impacts Nitrates are the pollutant of greatest concern from the disposal of waste water effluent in subsurface drainfields located over the aquifer. While other anions would be carried with drainfield percolate and may reach the aquifer they effect primarily the aesthetic quality of drinking water . ~ and do not pose a public health problem. Other pollutants are very effective- ly removed by soil biosystems. The potential impact of nitrate contamination of the ground water could be mitigated by the addition of nitrification and denitrification unit operations to the proposed waste water treatment facility. These operations are extremely expensive when applied to small treatment , facilities. In addition they add significantly to the complexity of-opera- ~ tion of the plant, increasing the possibility of system malfunction and up- set. At the present time nitrification-denitrification unit operations are not employed on any sewage treatment facility in Spokane County, including the City of Spokane treatment plant. The potential for groundwater con- tamination could also be reduced or eliminated through the use of an evaporative lagoon. Evaporative lagoons require large land space and do ~ not operate efficently in the Spokane climate. Past experience with such systems in Spokane County has been largely poor. Problems with odors and overflowing from poor desi4n have been significant. The selection of an interim package treatment facility for the proposed project is a factor that will mitigate the long-term impact that the'project • may ["lave. Such interim facilities are not designed to be permanent installa- tions but have the flexibility to be modified to provide a greater level of control or be replaced in the future by central treatment facilities or by more elaborate small systems. The collection and distribution system is al- ready provided and the cost of connection to a central treatment facility arould be minimized if it is determined that such a facility is necessary. • Proper drainfield site selection will also mitigate the potential for ground water contamination from percolation of drainfield effluent. The drainfield should be located to avoid areas where the water table is shalloEV, slopes are steep or soil permeability is excessively high or low. Any • 103 220 ~ 0 potential risk to the qroundwater from the disposal of sewaqe treatment s.ystem sludqe at the Mica landfill could be reduced or eliminated b_y disposing of the sludge at the City of Spokane central sewage treatment ~ plant. This would preclude any potential qroundwater contamination or public health problem that could result from disposal at a landfill. . d. Unavoidable Adverse Impacts The possibility that some waste water treatment system effluent will • percolate to the water table and carry contaminants to the ground water cannot be precluded. The proposed waste water treatment system, however, provides the flexibility to meet future waste water treatment needs as they arise. • • • ~ ~ • • ~ 104 221 • C ni raii.ni Quni I iv ni Gi;uuNnIHnii u !),,MrLr. sire NuMaEk: 54-29H-W6-lP 2-4 -sITC Locnrior,: ;)a ta 0atr Qeplh 1•la tcr Specific pli Turbidity Thrc;hold Ui;solvcd Oi;solved Dissolvecl Ilirdness Dissolved Dissolved Dissolved To ta l Total To'al "or,:' unjilyd ((t,~ lrmp- C,on(iuCt- (units) (JIU) Qdnr iiliCa lrnn inyani-w (C,i,iuq} Chloridc Fluaride Sulfdtc rlitratv Nitrito Ph;; ;isso;vrd rrature mcc Nun;hcr ~2 ) (fc) (Mn) (~ny/l) (CL) (F) (SQp, ) (Pi) (t:) (F;,) SoliCS ("C) (unils) (ni(iuy/l) (~uq/L) t~nrl/l~ (mr~/L~ int9/~) (inqll) (iuq/L) ~~Jnildi•~ ,'ririi S 2.0 10.0 r,'iin;ii•y' Or 3.) fl 3 ~I!-•- 'CSU.U 25Q,(1 - • - )8.r, 208F 1-19-78 7.5 355 6.6 184 . 208F 3-7-78 7.5 365 7.2 -10.0 188 5.9 7.0 3.9 .013 247 208F 4-10-78 9.0 352 6.8 186 7.1 .0 3.7 .023 208F 5-3-78 8.5 335 6.7 180 N 208F 5-31-78 900 325 7.0 118 9.7 9.0 3.96 .025 236 N N • • • • ~ ~ ~ ~ ~ • • ciiit•Ii(,ni fiuni iir rn r,i;uiMtJI-Jniiu l: SITC flU5411-R1 MTC LocnTIot,: , Ral_four._Pa.r_k.___ IIat,+ U<<tc Ilcpth Walcr Specific pll Tin•hidity Tlirt,hold ;1i:solvc,d Di,,~olvtd Uis5olvCd Iltrdncss Uissolved Oissolved Dissolved Total lotal To'al 73ta' ',uurr.Sauipled (it.) lc:up• CanduCt- (unils) (J1U) Odor Silica Irnn "lanqanese (Cd,mq) Chluridc Fluoride $ulfate Nitrolc rlitritr Ph;; Cisso;ved eraturc ancc fluniber (5~0.L) (fe) f1~~n) (•ag/L) (CL) (F) (S0p.1 (~a) (~:1 (~~.1 :ol ids ("C) (units) (niq/t) ~uul/L) (intl/~~ (m~/L) ~uq/L) (iu~l~) (uiq/L) (ittqlL) ,mq!:) J Ilfla Yd 2. (I 10.0 :'rirsiry~ ' or .J_ 7,0 (1 3 Z!,iI,U 2a0 .0 ~i~f. ~ ,r, um~,u•1 ( f, >C.S 208 1-4-78 0 10 365 6,3 192 7.4 208 2-16 3 , .0 1.88 .005 223 208 2-16 3 11 365 6,2 198 18.6 40 1.88 ,012 217 208 2-16 6 11 330 6.3 184 13,1 208 2-16 12 11 290 6.6 184 7.8 .0 1.51 ,005 182 208 2-16 22 11 280 6.6 178 5.0 N 208 2-16 50 11 252 6.7 176 2.1 208 3-27 3 11295 6,5 lhf 12,8 .0 2.30 208 3-27 6 11.5 295 6.6 148 9.1 208 3-27 12 11.5 250 6.7 -10 136 3.0 14,0 1.55 005 151 208 3-27 22 11.5 250 6.6 134 2.8 208 3-27 49 11.5 240 6.1 132 1.9 208 5-01 3 11 300 6.8 144 6.5 .0 1•90 208 5-01 6 11 290 6.6 138 5.2 208 5-01 12 .0 1.58 208 5-01 12 11 250 6.5 -10 136 2.2 12.0 1.58 005 152 208 5-01 22 11 250 6.6 138 1.8 208 5-01 50 11 250 6.6 132 1.9 L ui ra i Lni Quni i i r ui r;i,(lUlll)l•1A I I k . . ,nMUC sITC (IuMaEa: 5411-R1 Con't, -s~IL LocnrIr►r,: . Balfour,._Park.__._ Itiat1, (leyilh Wa t c r Spmcific pll Turhidily lhreshold Ui;solvrd Ui,snlved Uissulved Ilirdncss Uissulvcd UissolveA Dissolved Total Total Tn'al "sti' '„i•ir '„mplrd (il.) lrny_ f.imduci - (imit~) (,11U) Odnr Silica Irnu Manyauuw,v (C,i,iaq) fhluridr flunridt! Sul(atc Ilili•aIr qitrit,r I'hr„ ~"•,n, v4,01 rrdlurT .uu'r Uiuidbor (It, ) (I i') (Flu) (~nyll,} (CL) (f) (SOQ) (N) (I~) :OlieS (mqll.) ;~!1!-) ("c) (units~ t11~Il/1.} (wq1/L) (u~y /L) (mq/l) (mq/L) (mqlt.) (ntqil) (mqJL) ',Ittnlird ' S 2.0 10.0 ' 3.n u s 25u a --250.0 uni„u'y' r,.5 ~ir ( > U.J 208 5-11-713 3 11 290 6.6 186 5.8 10 1.14 005 208 5-11 6 11 275 6.6 140 4.4 208 5-11 12 11 250 6.6 -10 138 1,8 12 1.45 .00! 159 208 5-11 22 11 250 6.1 126 1,8 208 5-11 50 11 250 6.6 116 1,8 208 6-13 2 11 255 701 140 3.3 N 208 6-13 2 11 255 701 140 3.4 13 1.77 .00! 165 ; 208 6-13 6 11 255 7.1 140 1.8 208 6-13 12 11 250 7.3 130 1.7 13 1.61 .00E 160 208 6-13 22 11 250 7.3 130 1.3 1.48 .00'r- 208 6-13 50 11 250 7.3 130 1.3 • • • ~ ~ ~ ~ ~ ~ • • • • ~ ` • ~ . • ~ ~ ~ ~ ~~I MH ni i i11f11 I I Y Iq r,r,uimuIin u i; V;•WLc silc' NuMecR: 5427-E1 -sITr. LocnrIoti; Modern Pdo. 9 I11atr peplh 4l,iter Spccific pll lurbidicy 1liresliuld Oi,,solved I)i',SQlVCd UlSSUIVed Ilirclness Uissulved (lissolvcd Oissolved Total Total To'al ';,!e' ;,oi.p lrd ((t.) Trni;i- f.ttin(luC1- (unil;) (,!1U) fldnr SiliCd Irnn '4,inilanwx (Cd,mq) f,hloride ritior;ae Suifdtc (litraie rlttriti• vrd rr.ilur~, Oncr IIu,uLrr 0 . ) (f(h1n) 0111/I ) (CI.) (f) (SQp, ) (N) (C) >uliC! a (°C) iuin~.) (nn~~i ) (un~IGf (uu~/~) (iu~~lll (ro~~l~) i~u~~1~.) (nu~l~) (mq1~) (mqli ) ,"~~~=1 f i ~ul,i rrl 1L 0 .'i•i„n ~ 5 Z.II ( ry ~ ( Or W) • - • 'lVl. U • • • 250.0 208 1-30-78 11 300 6.7 10 148 2,8 208 3-09 11 300 6.6 176 3.8 208 4-12 11 285 6•6 -10 143 2.4 13 1.99 005 165 208 5-03- 10 320 7.1 158 2.8 208 _5-03 208 5-03 11 2.17 005 N N CT1 Ci1i a1i{,ni Quni i iY rn r,i;uuUin-Jnii u ~ -',I I I I.nrnl i ori: Vera rJo, .4 I1.11o 0atr liv;illI l•l,rter Specific pH lw•bidity Thr•eshold lli;solwvd Oi,,solved Uissulved Ilirdnes5 Uissolved Uissolved Dissolvecl Total Total io'al 73te* lyd (ft.j li'm>) - f,nnchict• (unil;) (JlU) Odnr SiliCd Irnu A.inytmww (C,i,i,iy) f.hloride I'luoi'ide SulFate 1Jitralr, flitritr f'!l".!. ~,SSO: ved vralurc ance ~~ui,~ber U } '(►C) (►an) (•jq/L} (Cl) (F) (50 1 00 :olics ( "c 1 (Un i cs l l11~~~Ti ) } (~~~~~/l) (iiio/L I ci,tt,1L 1 (1119J~. ) (iiiriiL ) (iiic,iL 'ilt::~u'~I~ ri Z.fl IfI.O ' ' .(I!, ~U-l) Zri0.0 ~~I~~ i~,'un~i•~~';' (Or j.(l 1 >L.~) 208 2-01-78 11 400 6.9 10 3.2 204 208 3-09 9.5 390 6.5 3.5 216 ~ 208 4-17 9 400 6.9 3.2 208 208 5-03 9 485 6.7 3.3 204 208 5-03 208 5-25 9 365 1.2 3.6 232 14.0 2.92 ,007 246 N N 61 ~ • • ~ • ~ • • • • ~ ~ ~ ' APPENDIX E • ESTIMATED DENITRIFICATION COSTS FOR VARIOUS PROCESSES ~ • • . • • • • . 227 • ~ BIOLOGZCAL DENZTRIFICIATION Aiixed Reactor Tables 1' and 2 show the design basis for denitrification in a mixed, » uncovered reactor and the unit process sizing. The anoxic denitrification reactor is followed by an aerobic stabilization reactor for removal of any excess methanol. Solids are then removed in a clarifier and recycled to the denitrification reactor. Estimated construction costs are shown in Table 3 and O& M costs in Table 4•.. ~ Fixed Film Denitrification The costs of fixed film denitrification were estimated based upon the following criteria: 6 ft deep bed, gravity system, 2-4 mm sand, 2.7 gpm/sq ft at average flow, backwash 15 min/day at 25 gpm/sq ft and 25 ft ; TDH with auxiliary air scour, 3:1 methanol to N03-N ratio. Costs for the fixed film system were based on the work conducted on filtration system costs by CwC under EPA Contract 68-03-2186. Construction costs are shown in Table S and operation and maintenance costs in Table .6. ~ PHYSICAL-CHEh1ICAL NITROGEN REMOVAL Cost information was developed for the physical-chemical alternatives of breakpoint chlorination, selective ion exchange, and ammonia stripping. Construction costs are shown in Table 7 and operation and maintenance . costs in Table 8,. Breakpoint Chlorination The basic design criteria used were as follows: Provide 30 seconds of rapid mixing, G= 900 ~ Peak NH3 concentration = 2 x average NHq concentration Chlorine feed capacity = 10 x peak NH4-N concentration @ average.flow ~ Costs of chlorine contact facilities were not included b2cause such facilities would normally be provided for disinfection purposes even with- out the need to remove nitrogen. Costs were estimated for average NHg-N concentrations of 10, 20 and 30 mg/1. Construction and O& M cost information was derived from reports ~ preparEd under EPA Contract 68-03-2186 by CWC. Chlorine usage in the various size facilities is as follows: . ~ 228 . ~ ~ TABLE L- . DESIG-iq PARAr1ETERS, MZXED REACTOR DENITRIFICATION , Denitrification reactor: Type Suspended growth Nitrate removal rate, lb N03-N/lb MLVSS/day 0.1 ~ MLVSS, mg/1 1500 Mixer type • Submerged turbine Mixer size, hp/1, 000 cu ft 0.5 • Aerated stabilization reactor: Detention, minutes 50 Aeration, hp/1,000 cu ft 1 . Final clarification: Overflow rate, gpd/sq ft 700 Sludge recycle, $ 50 rlethanol feed : ~ Methanol: nitrogen ratio 3:1 r N03-N concentrations, mg/1 10, 20, 30 ' ~ S r ~ 229 • . . • TABLE z. UtJIT PROCESS SIZES, 14IXED REACTOR DENITRIFICATION Plant capaci ty , mgd ~ Unit process or component 1 S 10 Denitri fication reactor Volume, cu ft/mixing, hp S 10 mg/1 N03-N 81900/5 44,500/22.5 89,000/45 20 mg/1 N03-N 17,800/10 89,000/45 178,000/90 30 mg/1 N03-N 26,700/15 133,500/67.5 267,000/135 Aerated stabilization reactor r - Volume, cu ft 4,500 22,500 45,000 Aeration, hp S 22.5 45 Clarifier . Are a, sq ft 1,500 7,500 15,000 ~ Return sludge, mgd 0.5/0.75 2.5/3.75 5/7.5 Methanol feed, lbs/hr ~ 10 mg/1 N03-N 9 44 87 20 mg/1 N03-N 17 87 174 30 mg/ 1 NO 3-N 26 131 261 t ~ Ave rage/Pe ak - Ave rage f low is used to de te rmine the powe r requi rements and maintenance materials cost. Peak capacity is used to determine construction cost and labor req uirement. ~ r ~ 230 ~ • * ~ ~ ~ ~ ~ ~ ~ • • TABLE 3. CONSTRUCTION COSTS, MIXED REACTOR DENITRIFICATION, 1976 Construction -costs, $1,000 I mqcl [)lant 5 mgd plant 10 mgd plant 10 mg/l 20 mg/l 30 mg/l 10 mg/l 20 mg/l 30 mg/l 10 mg/l 20 mg/l 30 mg/l N03-N N03-N N03-N N03-N N03-N N03-N N03-N N03-N N03-N Denitrification reactor Basin 100 160 180 250 360 440 360 510 680 t,tixers 16 27 40 SO 90 120 90 160 200 Aerated stabilization reactor Basin 60 60 60 160 160 160 250 250 250 Aerators 16 16 16 50 50 SO 90 90 90 N Cl.arifier 90 90 90 290 290 290 600 600 600 w J Return sludge 70 70 70 160 160 160 250 250 250 P-tethanol faed 6 storage 35 50 65 50 80 120 80 150 200 Subtotal 387 473 521 1010 1190 1340 1720 2010 2270 Yardwork 54 66 73 141 167 186 241 281 318 Total construction cost 991 539 594 1151 1357 1528 1961 2291 2588 These costs are for the denitrification process only and do not incluae land, engineering, leqal, or financing durinq construction, but include 25 percent contractor profit and overhead. TABLE 4.• OPERATION AP]D MAIPJTENANCE COSTS, P4IXED REACTOR DENITRIFICATION, 1976 Annual requirements Labor Enerqy Maint. Total 11000 materials, Chemicals, annual, Planr capacity Nours $1,000 Kc-1H $1,000 $1,000 $1,000 $1,000 1 m,d 10 mg/1 t103-N 3,400 30.6 65.8 2.0 4.3 6.9 43.8 20 mq/1 t103-N 3,650 32.9 91.1 2.7 4.8 13.7 54.1 30 mg/1 td03-tt 3,900 35.1 116.3 3.5 5.1 20.5 64.2 w ~ ingd N 1.0 mq/1 P103-N 5,070 45.6 301.0 9.0 7.9 34.3 96.8 20 mq/1 N03-PI 5,600 50.4 426.3 12.8 8.9 68.5 140.6 30 mg/1 rir) 3-rd 6,150 55.4 552.0 16.6 9.9 102.7 184.6 1.0 m q d 1() mc{/1 P1O 3-W . 6,800 61.2 586. 3 17.6 11.3 68.5 158.6 2() my/1 N03-14 7,700 69.3 837.4 25.1 13.2 136.9 244.5 30 mg/1 ~103-rd 8,200 73.8 11088.1 32.6 14.6 205.4 326.4 ThesP costs are for the denitrification process only and include labor at $9.00 per hour including Eringe be.neEits and electrical energy at $0.03 per kwh. • ~ ~ A • ~ • . • • • ~ TABLE S. CONSTRUCTION COSTS, FIXED FILM DENITRIFICATION, 1976 ~ Construction cost, $1,000 Plant capacity, mgd 1 5 10 ' Structure 336 776 1,506 ~ Media 12 40 80 Air/water backwash 160 150 280. . Methanol feed & storage 50 80 150 ~ Yardwork 78 146 282 Total construction cost at 20 mg/1 N03-N $636 $1,192 $2,298 ~ . at 10 mg/1 N03-N $619 $1,138 $2,218 at 30 mg/1 N03-N $653 $1,238 $2,355 , These costs do not include land, engineering, legaZ, or financing during construction, but include 25 percent contractor profit and overhead. ~ ~ . . ~ 233 • • ' • TABLE: 6. OPLIZATION AP1D MAIfdTENANCE COS'fS, FTXED FILM QENITRIFICATION, 1976 Annual requirements Labo r Ene rgy Maint. Total 11000 materials, Chemicals, annual, nlant c3pacity Hours $1,000 Kr1H $1,000 $1,000 $1,000 $1,000 1 mqd 10 mg/1 1103-fd 3,850 34.6 11.5 0.3 1.2 6.9 43.1 20 mg/1 td03- P1 4,000 36.0 11.8 0.4 1.2 13.7 51.3 30 mq/1 N03-N 4,150 37.4 12.0 0.4 1.3 20.5 59.6 N ~ 5 mgd 10 mg/1 N03-td 4,500 40.5 43.0 1.3 2,1 34.3 76.2 20 mg/1 P103-PJ 4,800 43.2 43.8 1.3 2.3 66.5 115.3 3n mq/1 N03-N 5,100 45.9 44.5 1.3 2.6 102.7 152.5 10 rncjd 10 my/1 ri03-N 5,400 48.6 73.0 2.2 3.1 66.5 122.4 2ri m,g/1 110 3-N 5,800 52.2 74.1 2.2 3.6 137.0 195.0 30 mg/1 ra03-N 6,200 55.8 74.8 2.3 4.1 205.4 267.6 These costs include labor at $9.00 per hour including frinqe benefits and electrical enerqy at $0.03 per kwh. ~ TABLE 7. CONSTRUCTION COSTS, PHYSICAL•CHEMICAL NITROGEN REMOVAL, 1976 Construction cost, $1,000 NH„-N concentration ' Process & plant capacity, mgd 10 mg/1 20 mg/1 30 mg/1 ~ Breakpoint chlorination 0.01 4.6 7.1 12.3 0.1 17.2 25.4 36.1 1.0 70.5 114.8 176.2 5.0 229.5 377.1 623.0 ~ 10.0 377.1 696.7 1,475.4 Selective ion exchange 0.01 98.4 98.4 98.4 0.1 147.5 147.5 147.5 1.0 442.6 442.6 442.6 ~ 5.0 1,557.4 1,557.4 1,557.4 10.0 2,704.9 2,704.9 2,704.9 Ammonia strippirig 0.01 3.9 3.9 3.9 0.1 31.1 31.1 31.1 ~ 1.0 245.9 245.9 245.9 5.0 1,065.6 1,065.6 1,065.6 10.0 1,967.2 1,967.2 1,967.2 ~ Costs do not include land, engineering, legal, or financing during construction, but include 25 percent contractor overhead and profit. ~ - ~ 235 • • ~ TABLE S,_ OPERATION AND MAINTENANCE COSTS, PHYSICAL-CHEMICAL N IT ROGEN REMOVAL, 1976 ~ Annual cost, $1,000 NHA-N concentration -Process & plant capacity, mgd 10 mg/1 20 mg/1 30 mg/1 ~ Breakpoint chlorinatinn 0.01 3.7 4.7 5.4 0.1 11.0 17.0 23.5 1.0 52.0 100.0 140.0 5.0 170.0 280.0 400.0 ~ 10.0 210.0 380.0 600.0 Selective ion exchange 0.01 13.0 14.0 15.0 0.1 18.0 19.5 21.0 ~ 1.0 • 40.0 47.0 55.0 5.0 130.0 150.0 180.0 10.0 210.0 250.0 320.0 Amcnonia stripping 0.01 2.8 2.8 2.8 0.1 6.2 6.2 6.2 1.0 18.0 18.0 18.0 5.0 57.0 57.0 57.0 10.0 170.0 170.0 170.0 ~ Costs include la.bor at $9.00 per hour including frinQe benefits and electrical energy at $0.03 per kwh. ~ ~ ~ 236 ~ ~ ~ 10 mg/1 NH4-N 20 mg/1 NH4-N 30 mg/1 NH4-N • 0.01 mgd 1.5 ton/yr 3.1 4.5 0.1 " 15 31 45 1 150 310 450 10 1500 3100 4500 Costs of chlorine were based on use of ton cylinders for quantities up ~ to 450 tons/year ($0.11/lb) and on tank cars over 450 tons/year. Between 1 and 10 mgd, the demurrage cost on the rail cars will result in an effec- tive chlorine cost in excess of $0.05/lb and a gradually decreasing cost down to $0.05/lb at 10 mgd. To determine 0& M costs, a labor rate of $9.00 per hour and energy cost of $0.03 per kwh were used. The same unit costs for labor and power were used for all alternatives. ~ Selective Ion Exchange The costs for this process are based on use of clinoptilolite exchange media in gravity structures with recovery of the regenerant in closed-loop stripping towers. A minimum of four exchangers was provided for each ~ capacity. A four foot deep clinoptilolite bed loaded at 5.25 gpm/sq ft was used. Exchanger construction costs are based on cost of gravity filtra- tion structures developed by CWC under EPA Contract 68-03-2186. Costs include the exchange structure, backwash facility, influent pumping, clari- fication-softening facility for the spent regenerant, and closed-loop stripping tower for regenerant recovery. Constructi.on costs are essentially • unaffected by ammonia concentration but regeneration frequency and operating costs increase as ammonia concentration increases. Costs for the c2osed- - loop tower modules (such as illustrated on pages 9-75 and 9-76 of EPA's Technology Transfer Manual on Nitrogen Control) are based on the estimated cost of such units for the Upper Occoquan, Virginia plant. Influent pumping costs are based on 15 ft TDH with regenerant recovery pumping at 35 ft • TDH. Chemical costs are based on those projected for the Upper Occoquan plant. Ammonia Strippinq Construction costs are based on a tower loading rate of 1 gpm/sq ft • with a tower packing of the type used in the Orange.County, California plant (see page 9-90, EPA's Technology Transfer Manual on Nitrogen Con- trol) with 24-foot packing depth. Construction and O& M costs include influent pumping (50 ft TDH). The costs do not include elevating the pH of the wastewater to an adequate level for stripping nor of subsequent downward pH adjustment following stripping. The costs of the stripping • process to provide a given percentage removal of ammonium-nitrogen are irldependent of influent concentration (at a given temperature). ~ 237 • TABLE 9 CHARAC7ERISTICS OF tItTROrXN pE"x•VAL PROCESSES Oxidation Bioloqical multi-staqe dicch plant (lncro- 9reaknoint Selective nitrogen removal lincremental mental over bioloqical fa;.,o c chlnr:naCion ion r.xchange ArtunoViia strtpping nitrif. plus denitriEicationl treaCmenc requirementsl Lonq SRT provides satis- ar.prt,-Ire tb Sianificant tlo Stqnificant Process performance Process is very Cemperature ' F.ffect. E(fect. ►s very temperature sensitive. A decrease of factory operation vell sensitive and freez- reactor ten@erature from 20•C belov 10°C t in some inq teinperatures can [0 10°C requires doublinq (at casee to nearly 0°C. cause process shut- least oE process reactor sizes - dw n due to i:e relative importance of air b , formation. water tertperature depends on process selected. ir,f!uG;nt wij,>r irpact Relatively Process provides Constructioo 6 0 e M costs [nfluent amnonia concen- Ni;roaen on tetal costs: m(nor impact essentially fixed ~ generally increase vith in- tration has little effect :^ncentra- total costs for on total costs: of removal oyar a creased influent amrtonia up to 50 or 60 mq/1. :ians average of 30 total co5ts for vide range of concentration. , N mq/1 t1N4-ti are averaqe of 30 ammonia concentra- ~ 270% of costs mg/1 NNq-N are tions. 0 10 mq/1 125% of costs @ 19 ma/l [a n;i 5-10 sq ft/nvqd 200-100 sn ft/ 750-100 sq ft/mqd 13,000 to 26,000 sq ft/mqd lncremeotal land require- Fci tnrer,r~nts mqd. ments over Dlalogical treatment (70,000-500,000 sq ft/mqd) are nil. ^o^rattonal Simnle R effi- Efficient, de• Simple ooeration Subject to blological upsets Same as biological plus _ansi-'r.ra- cient, but re- pendable, s con- but subject to ooor which may disrupt process denitrification ef[iciency, !ians quires hiqh t mlable for operation in cold for many days. reliability, 6 operability r,hlorine ansanes nitroqen removal, veather, shutdovn in have not been dr.monstrated whirh must be but operation 6 freezing reather, 6 widely. evaluated as r?- eauipment are rela- scaling oroblems, la_p9 co water Cively conplex. Process requires ryualit7. siqnificant pN adjus[- ment nrior to end after strlpping. La.+. *ypicall•; Medium, t7pically Hiqhest, t7pically Nigh, typically 900 kwh/mq Enerqy wnsurtption is less c,err~ 15 Y.wh/mq 25n kvh/mq 1500 kvh/mg than bioloqical require- ments. C,)n,ination ~ • • . . • • . • . • ~ ~ ~ APPENDIX F • SPECIAL MOPJITORING RESULTS IN VICINITY OF PROJECT SITE • • . ~ • • • • 2 39 ~ 1.111 rlil ni 1Ynni i ir in I,i,nnmPunii i; ~IlIMPLC Sll(: tlUl'1(;CR: -SiTf. LOCATION: I'lata Datc Drpr,h l-later Specific nN Turbidity Tlnrcshold I)issolvcd Ui,,solved Dissolved Ihrdness Oissolved Dissolved Dissolved Total Total To'al "ctp-' •rr 1~a+nj 0 lyd (ft.) lemp- {:onduct- (units) (JTII) Odnr Silita lrun :1'in1I,inrC;e (Ca,my) ChlOriAc F luoride Sulfdte 1litralr Ilitritv Ph;; ;„5p:verl rralurr uiir Ilunil-iir 00 (1411) (•rqll) (CL) (r) (50 ~ (N) (G} >ulit', ("C) (niy/L) L~ ~uul/L) ; t dnl~ rd i1~iaiiv~ 2,0 f.. 111.0 ril, 7 II .~I', .il ~~.~J .0 - 15U 0 250. - lll' 3 ) 3-28-18 13 450 226 7.5 5.2 WWP 3-28-78 14 500 244 6.4 5.0 N 2-2 0 3-16-18 10.5 500 244 6.4 5.0 WWP 2-4 8-16-78 9 360 182 8.0 3.9 MODERN No.9 8-16-78 11 290 . 164 3.8 2.3 VERA No.4 3-16-78 10 450 226 4.1 3.4 ! • ~ ~ ~ ~ ~ ~ ~ ~ i ~ ADDENDUM ~ FINAL EIS COMMENTS AND RESPONSES • The following pages contain the comments received on the Midilome Subdivision Draft Environmental Impact Statement. The written comments are ~ reproduced in their actual form in which they were received, on the left side of the page, and the Spokane County responses, on the right side of the page. • • ~ • ~ - , 241 • . • t UNITED STATES DEPARTMENT OF AGRICULTURE SOIL CONSCRVATION Sf.RVICE Itnom 3bli, II.S, f.utu'thoasu, SiwLouc, llushinpton 99201 ~ August 28. 1979 , Spul;mu IFnmty I'Iamning Ucpartncnt 9nrth VII icffercon Spn4,in,, PlA 1111201 lfe li.iro IwmJ thr, soils nml thc solls map Anta correct ns lis[cA in the ' dr,ii'i eneirumncnt;il lmp.ict statMncnt for the propaseA develalunent sito. Isis p:,ge as, the tapng aLgp Si,ows ,nat ,t,c Jrainogc i5 to rnz [,o,•tn, 1 n ' The surface water drainage plaii far the project is designed so as to iuwards Plout IChestcr) l:rceA, whith is nppiozinately mile (1,510 fcat) to :m nIJ inl,c bcd which is campwscJ of Nar.isse silt lo;+ni 0-SS; Phuebe v clispose of surface water mnoff in excess of that which occurs on the projeet "°"°P` "l`Y `'°Y ~oa"; :iod1w'•a"'Y S'" '°a'". site in its natutal condi6on on the praject site. The proposed project will not Ali or the:~~ s(iiis jrc iw„owiana soii:; tAat are suhject to Fiooaing, increase the volume or peak ratc of surface watcr runoff from the project site gwicr;illy in the spring, anJ it cnn hc cxpcctcd thnt if nnv aJdihanal towards PloufCreek. runotF h~aier cimucs from the Midilome site that it %onld acrcl~• compounA thc (IuoJing 11rnhlL-11Is in this low nrca. nddirion:illy, it is our opinion thnt Juc ro the rapiJ percolutwa TlC potcntia) for ground W3tCI contamination from th0 subsurface ~ abil iry ol' thc soil, gruund vater cou1J M; ptillutcYl. ~ O disposal of surface water and treated waste water treatment system effluent is N If wc c,ni hc uf ~ervice to you in Acnl ing witA tAls problcm, NIC1SC discussed in tlie section on water quality included herein, iOnt;ict our Jistrirt conserrntionist, Jud Meltnn, and our SpoAnne field oPticc lo.:itcd at AI?S f. Spragnc, SppAaue, Ilnshingtun 99206 fliam6 yan foi thc oplwihmity to review this Jraft environmen[al Impnct ,t,it"ment . $imeivly, I.,ilrii 5 flriilgC ~ ! > Stril,` I:unacNat iuni 5~ PFCFIrED Pl4t'v; O • • • ~ • • • ~ • . ~ , srATE oF pgppRThlfNT OF ECOLOGY WASIIINGTON ~,,,iundw~awW.,sr.L,ro,wr~.~,~wvr ru~~una~s ~ w / DuV La¢ Nh' G- September 11, 1978 Spokune Couney Placinlnp Oepurtmunt uoreh Bll JeFEcroon Spoknne, Noshington 99201 SUBJRCP: HLdlloue SubJivlston Drnft F.nvlronsental Imyioct Statement ~ Ccntleocn: Iir, have revieved thia DEIS v1tA eqphaels ao the[ portloo dQaling W1Cd ground veter impncC. We Qlnd [h1o uuDjecC covcred tn deptA ond hnve eaamwnted primnrily upon interpretntion of certain dn[o and curcent Spakane County 208 proprnn QfnJfnge vhlch vere not avpllpble nt the dme thls DLIS wae vrltten. , Under condlclona of Deparrocnt oP Ecology policy adopted MarcA 9, 1918, nnd tn nccordonce vlth tfAC 173-240 to be udopted !a Novenber, 1978, ae O 3 wcll ae RCN 90.48.110, Chc IqC musc review che ecvcrage eyetem ond The requin:ment for an independent and speeifie DOE review is noted. ` disposnl inctlittea for apprwnl ar dlsapprovol. Thie reviev opplies N stuce the dluposel Facillty to n eeChnn{cel eystem serving 1n exeeee 4:::, of 10 llvinq untte. DOE review vill be in addlHon to eny other re- w qulred 10ca1 or etate revtewe for epprovel. It will not replace eny oeher revlevs, ond actual conetructiun auet confom to thu muat atrin- gent requlrunente set forth tu appruvale from nny ngency u1tA jur1c- dtcttan. 'Fhe AOE has revleved end approved [he sye[em for Pdese I of tAe M1df- , lome SuDdlvtalon. Thi9 approval !e euAJect to eppeal to thr. Pollutton Control Ileerings ➢oerd vitd e Aearing currently scheduled for Ociober, 1978. Subaequene Mldflode Su6divteion developmen[ phnsetc uill requlre fuccher ' 1N1L review for npproval. Tha order of our review is ro flrst present a Suamnry of Opinlon whlch is dravn fcom our ovarell knovledge of tAie proiect end 1te relucion- chlp to uautuvutor manugeWent over the Spoknne Vnlluy - Rachdrum Pral- rle Aqulfcr. Follovlog chfe euomary ore iCedacd comments deoliny wLtli DEIS comente and conclusfone. Ae is truc wlth the DF.IS, maec rnttonnlc for revlev commenes 1s taund Ln the Appendix A eectfon. R E C E I V E p Slncarely. SEN 12 1978 O~,.~_,.,,,,a,~ ow~ L. tuisT u $POKANE COUNTY Regtanol Manngcr PLANNING DEPAR1MfNT eaetern Reglonal Offlce JLA:cac ' , Prepnrcd by: Rhye Ster1L Eavicoiuental Qunltr vieor Sumwerv of Oninlon Thc inforniation presented in the E[S supports the Departments 1. Ic fe ettll the Dcpartmenc'e opinloa eheC e een[rallzed emrer eye[em ~ leeAtng to e wescc tseatment plent (designed to give aecoadory tree[- ~ conclusion that the proposed activated sludge system is the best available and ment) and diechargiog [o 0 ouDeurfete dreinfleld repreaoate all knovn, reasonable method of sewage trcatment for the proposed project. avallable nnd reoeonnblo methode of polluttou control. SurFace irri- getion or comylete contofameat of the raotevatere vould represent the hlghcet degree of uaete hendling. Hovevet, [Ac eanetralntn preecnted by epata requlremento and lead corce make tAene optlona nat prectlcel in many lnetancoe. 2. it ta our oplnlon thut dlechorgce from clthor eeptlc tanke or potk- age trentment plnnto vill ceault in very eimilor Impoct oo the ground This is consistent with the information included in the E1S and is note . witer quollry. Thc monc wlnerablc :one af ground ve[cr lmpoct wuld be the cop ueveral feot. Cenerally, ratet Quullty vlll toyrove uftA depth oe n result of etrad flcatlon. Ralle caeed to greater ehen 30 fect Snto the equtfer vould drav fram euah e large volume of ueter that drlnking va[es ataudarda ehauld Dm met from dtlutlonal ef[ectu. Shnllou veU e c:ecnding leen then 15 (eet lnto the equifer ahould be Afecournqed no matter v6ere the elte !a. , N ~ ~ N 3. The Chcster area oe the nqulfcr deflnttcly demonet[aC¢e a hlgher salt concantratlan then the aacelled mala eUCam. Resardlene of oted. ~ the type ot eevage oed/ar storm vater dlepoeal eyocco le lnstalled ~y in chlu area, ground vnter qunlity vlll Ds aEfected, lf develop- mentu are cantlnued ra bo approved !n thle aren, eddf donel lmpact on grounA vuter can he expected. tikevlae, ground uateC palluUan from aua[ ogrlculturnl actlvltlea may also be qulte algnlflcant. With nll oE thix to coneldnr end contend v1th, the Mtdiluma Dev- clopvent 1s at leaaC toking the propcY flret s[ep ln the evenCUOI mlc18ntt011 of ground vn[cr pollutfen tn the lnutellatlon of o gen- erol severn(Lu eyetem. The enttre Cheatcr areo awst be assessr.J ns a M gh priority ln the eventunl sewzrtng of the populoted Spokenc Valley area. 4. 1[ musc nloo De uncteretood tllat die efgnlficenc Impnct to qround O / vucer qunllty 1n the Chestcr ares hae already bcen achleved - ~ Noted. vlthout Mldlloce. Mldllome, Dy ond of ltseif, vill not lncrease thr, overell impecc on ground uaeec tn chat nrea Dy aace chsn n moderatc amount. It vlll have an Impact Gut there Rhauld not be n meaHUCeabin chenge 1n oxtat5ng ground vnter suppltcs due solely to [hle JevOlopment. • . . • ~ ~ ~ ~ ~ ~ ~ - L , • I1OACY 9Ul41AAY ~ Psleting Conditlono 3. Yaccr Yagc 14 (pnrogroph 1): LitUe eonflicc exlete over the proDeb111ty of veete ueter diepoaol 8 8 This por6on of the llEIS has been revised based on the new water quality drainl'lelde an e eourte of oQutEer reoAerge, nowcvoT, the quelltativc data macle available since the publication of the draft. Please refer to lupact oE thle recherge lo not pet detanfaed. Appendix D. Yagn 14 (pucograph 2): The eouree of ealt cancentretion lncraseee in the aqulfer are pdmrl- Q . ly duc to mon'ooFtividco ovar end along thc aqulfar recAargu conc. V ~ Please refer to Appendix D. 7Te current reaulte of depth selecdve ennplinge prove tAere !e e Aeavfer concantretfan of eelb an the eurfece af the ground veter under met efr- cunstancee. The ProCnEle Imoact of Provoeed Actlon 3. untcr • Pegc 19 (puregraph 4): ~ Nhlle Lhe chemlcal conatltutuente of treated vaete vater are recognleed +O 10 A portion of this section has been revised based on the new water quality ~ contoialnnnto oF [he gruucid vatar, the potenUal for aerlous bec[erlo- loglcol nnd virua cootauLioatioo eoee exlat. information that has been made available since the publication of the draft. Acaepttnq thnc effluent Erom the propoeed actlvaced eludge treated effluent to uupertor to aeptlc tenk alfluent et the tfme ench reachee the drutoHeld, ' there Se lftcle evideace to indicate tRe md product of elther aystem rca- chtng ground vater te high Quelity. TAe quantltq of peTCOlete reeehing ground va[er from an acetvatcd e1«dge ¢evsge trcetment eyetem In anticlpa- tod to hc greeter tfwn lndlvldual dralnfield eyeteme due to lesa evepo- tranuplratlan loss. • Thore ie n high potentlal [hnt contlnued develapment in thle nreu vill re- eult in eventual drlating vuter etnadnrd violetlone and tnr.renecd bacterto- InElcnl tArcot. The Aelntionehlo Netveen I.or.el Slart-tcrw Uaex of Mun'e P.nvlronxnt and Halni•¢nnnce nnd 6nhnncemont of I,ona Term Producttvitv Paqe 27 (Peragcnph 2): 7he fnct lhet the treataen[ eyatem my be eupplesented vlth ncv tcr.hnology or eventmlly hooked up to a ccntrol seuer eyetem doee not predude nn Noted. lmpect an the nqutfut. The lang ten re[antion af cantaminante in the sall or thc 9uluraKCA sane ts a potentlnl. Pnpc 26 (Parnprnph 5) Threc mcaeures worehy of note nre: s) enlorged drafnficld area, b) special dratnfluld [reutmen[; e.g., nltrogen etrlpping graeeee, nnd c) buttcr dralnfteld utllizedon; e,g., doafng syeten. Thcsc potcntial mitigabng measures are noted. AlCCLni1ClVC8 co Proooned Nrofect 3. Alternatc llcvalopment Cuneuple Pege 30: n,e concluclon tliet use of tndlvldunl on-ette aepHc tanka wouta i,5ve Such a development would, however, tend to preclude the development the eFfuct uf lncreasing potentlal for grotmd vater con[uminuCion hua not been subatanClated and le probnbly lnrorrnct glven fever unura in 3 13 of an area wide sexver system because of the high cost of sewering low density a lav denatty developmenc. STC3S, ]n the long run such a development may result in greater groundwater contamination. N ' • 4:Lb a1 • - . • • • • ! i • • • • • • • • r • i • ~ • ~ ~ APPINDI% A, Cncegorical impac[ Aaelyale Flumcnts of Nhya[cul EnvLronmenC , 7. Wator (begln pnge 56) ]J Cround Wnter Quantlty n. Exlettng Condlttons I'occnelnl Rechbtue Erou Sevaae Dlsposel Svatem Oraiafield k'ngc 70 and 72: TAe scn[eucn[ tnac, "Thc pre] lminary reoultu oE on goina "zos" Na[er Please refer to Appendix D which has updated this section bascd on the Quility Manngcment progrnv..,,,, hnve no[ provided eny deffnitlve con- new water ~lt ~1t3. cluaiane regnrding potenttul recherge by dralnfleld ef[luents," shonld 9U Y be updnted to reflec[ currant InLerpretotlon oF the ftnnl vnter quality . dntn. As recognfzed by the wrltera of thie L'IS, the preliuioary results vcro bnsed an six monthe of dry veatAer eacqile collectton. Date frou the wec venthcr eaepling pcrlod deoonatrar¢u a olgniEicuut tncreace !n anlte ruaching ground vater vfn percolation frm the fumediate euifoce. A h18h desree of influence by aeptlc tonk effluent le not yet nubstan- tlnted but a pordan nf theee caneamloanta nrlgtn uwae bc octd buced on nlte acvope AlnpoaaJ. Pnge 12 cont'd: N 4~:h 'Phc statemen[ poinUng out 208 prelldnnry Jaca demoncl.rntco the moet ~I slgnlEicant ealt lnccooae occurrtng uu tha aqulfcr peasm undcr the Noted, C1Cy of 5poknnu nnd the orea to the north hae Eeea pnr dnlly explalned 1n J exnminad on of the ]ater dntn. Croos-occtlnnal plottLig oF ucll datn de- monntraCCa u degtee of rlver (lw nolt concentration wacer) lnflm to the aqulfer ca be htgher than artginally en[lctpnted. TAe rlver dllud on of aquifer enlt contentrntlona ln the Heat Vallay and knat Spokonu nren maskcd the aaount of ealt incrensee through thls aree. Irhen tAe flor of , rlver and aqul,Eer Jtverge Chccc lo an uaderatandaDlc changu !n elio mca- eurnblc lmpacL surfaco ¢ctivltles are hnving ao uucer quality. Water Uee ' b. 'I'hc ProbaAle Iopee[ of Propoacd Aetlon '1'ho baele far m41ng the statement tliat eeuage diepoenl from lh[s elte vould repreeent lese than onrtenth of mic percent NOtC(L oE the totul [lw of the nqul[er s}wuld bo QuallfleJ. YoAd'o • Ctgurc u[ 41 purccut of tIw total watcr appli¢d being ovailable [or percolatlan does not necesenrlly apply !n a ntrulghc per- cencuge cu each of the componencn. Scwage effluent being com- uanly In}ececd at depeho darn to 36 lnches weuld Ao oore ovnil- . able t'oT percoletion chon precipitation end lrrlgetlon entscure sourcea uhteh mitst pnse through the [op en1l nren of grcatest evopo-trnnspirot[on lnfluencu. ' . . , ! , 7.8 Cround Untor Quall[y a. Eztcting Candl[lona Phyylcnl und Inarannic Cheotsel Checacterlot►cs (1) Contaminate lf:vals in Excuac oF Drlnking Watcr StandnrAs Pagc Thls dlscusclon o! EcdCral primsry end sccondary watcr quullty ctandarda These violations ate noted. Detail information is not includcd bccause the vlolatlona ehould Do ezpended lo lnclude recent informtton. SpectfS- ~ uilly, the dlucovery oF bocterial contaslmtlon of tho F'dge C11fE uell sites are not proximate to the project site. and che occurence of cynide concentrotlon¢ nAove recommended levels near the Patucr MenA 1'lent ehould be nen[loned. PABC 81: '11ie apeculntlon thot a repoc[ed nitrata level in axcaes of che atandnTd n[ sice 25/44-26L1 mqy be in errar fe diminlshed euewltet by reccnt "208" ftnd- NOted. ingu. withfn the enclnvu of the Cheeter portlon af the aqulPer exlata • a band of vn[er vtch high ealt concene[atlon. Seacanal chercing of equlfur uacer levele toge[her vi[h eaqilc readinge lndlcote thfe bnnd is dieplnceJ cn I.hc SoutA no vater from dm [lsing motn nquifer flows lnto the aren. Contrnrlly, iss [he cen[ral par[lon o( [he aqulfer felis to louur levela unA N the Cheutur Cringn acen d[atnn, thc band moveb aorthvard. Shla phenomana 4.`+ eonld explaln lnconatatent nftcate resAings during dtEferenc oQutfet cleva- QO • tian sllCuations. (2) Hlotorlcal Nnkcr Quullcy Trendu Pngc 81 cont'd: The "208" ecudy rcparied "ftcld daca" is rermd less reliable 6ecnuse Ic fs This eomment is discussQd thoroughiy in comment No 70. The reader is gcncrally Lhe resulc of lcas accuratu and reliable unelytical methoda. 'R~ie A preeumpClon !s no[ carrect. Although Ileld reudinge uere found co Oe nbout ~Y free to draw theu own eonclusions. ' 25% Idgher ihan LOD0r71CACy reaulta In testing for nitrntea, s corrulation coefficlenc of 0.98 wne de[enlncd and the "208" fteld reeulta exceeded the perforniance expected a"ording to the FPA publicadon daal[ng vlth dila eubject. l.Iqevtse, tlie chloride rcuulta uhich vera roughly lOX hlgher in fteld ce;+ting [han la6oratory roeulte uere Judged af adequuCU accurncy. Nccent vork dvna by tha ":08" progrnm indlcates thnc there Is lndeed e trend ~O ^0 There appears to Ue substantial conSlict on this point between the United of chanRing vnter quolity virhln this areu. The hiewrlcol fncreaee Ln 1 ealls porolle7s populetfon grwth. Ttin lnck of rellaElllty of older aam- States Geolagical Survey and thc"208" Staff. Complete informalion an wells piea I9 recognieed Ay "208° plennere, hwever, iC le thought that the ,arHe in the vicinity of the project site ia included in Appendix A. Reacicts are Pree ❑umber of saoPles IeiiA eufFiclenc rollubilicy ta the ploc ahwiilg chts up- unrJ trend co conclude thst cAange hne takr,n plnce, t0 GOIttC 10 thClt O1Vt1 COIICIUSIOllS. db (1) Ilater Qunllty Varlatlons Wichin the Aqutfer Pagu 82 and 86: Tliu wurce ot aolt cootuntCatlon fuue4ee5 are curreatlq Detter under- erood [Ean at the time of the "208" Prelldnory katcr Quallty Report. P1Ci1SE I0P87 t0 ArpCll(JIX D. Yhe croes-oecttonnl uppronch co decermining the river lnflucnce dnmon- ecratee a clcar picture of the inereeeee. Furthersoro, CI16 YDC VCYCIIO[ enmpling devonocratca otretrflcutioa tokes plecc in all but thrae of the "208" depth aelective velle, 'Theea exceptlooe ore though[ to De undec- e[ooA wlthout dldntohing the velldt[y of etetietically canfirmed stru[l- FiceClon ln the majority of v¢lls. Scurm Wa[cr Urnlnaua . Page 92 nnd 94: ' The fmpreealon might 6e glven rhnt dicnolved lnorganfc mn[erials canecl- Wte the anly potentlal for grmind vnter contaminntlon Erom etacm wacer ? NOtL'd. . drelnage. 7Te petroleum and pcatlddes mentloned earlier nre e cancern that must be wneidered. Also, 1t is iaportant to notc thet the dry vell epprouch Co ctacm wntar dlspoeal provldes a conveyance uechsnlsm for acc[- dencnl ¢plllage of any matcrlnle to roncA grounJ vuter. c. Me¢euree ta Hltiante Advuree Iooactn Page 94 nnd 96: N The conclusian that lw denslty devtlopuente vould be aubetontlnily morc ,Vt1110 tpere , may be some problcros with connecting to (lIeV10U5ly ~ expmislvu to never Ir a central sevago trcatment Eacllfry !s estAnlignea 23 23 sewend areas such problems will be small when considered in light of those ~ ehould rnco gnlzc that thcrc ero sl gniflcen[ probleeu fn hooktn g n p U 8 Y8- cem chst vee inetallad ln Nic abaencc uf u mecer plan desling vith p[pe that will be encountered i f such a system mus t s tar t f r om scra tc h. AcpcA, etze nnd flw direction. The conclueion that monltoring wclle vould miClgate or prevent rontaolm- tlan o( drlnking uater supply vella ehould connlder the fnct thut it uould f~I ~A Monitoring weqs were suggested as a pntenGal mitiga6ng measure.They be dif£lcult ff not lapnsoible [o renove the contaminate aouree vtth n ehort-tlme notice. Aleo, the nnount of contnminatea thst cnn be emrcd in need not be implemented. the soll for annual percolatlon to grouml vnter la unknovn. e placement • of monitoring wulle vlll nlvnyo be suepect in the revtev of datn, nlau. . ~ 7.9 Ptibllc Wnter Suypltee ~ b. The Probeble IoWact of Propo3cd Actlon ECfluent Qualtiv Puge 99: . The emphssfe ln the cocpnrieon bc[Wcen effluent Quality or un aceivoted sludge ayateo v1tA septte tanlce ie to polnc out the areu rhere the foner There is considerable disagreement with this point. The writer suUmits no te superior lf constructad and opernted correctly. fliere /n a po[enclul inforniation to support the statement. fur Reptlc tenka m cootrlbuta ]csn total nltrogen to the ground uater, ond Chat should be recognl:ed. Poge 102: The diecussinn of bacturla and virue concludes tha[ pune[rndon nf these ~C ~}h N OtCd. ~ clemenc9 to the vater table la unlikely bccause of depth [o wo[ar end lov V LU mnisture conteut of the eo1L 99ite appears to Oe e hoaty coneluslon given the queatlone thu[ Chle dreft ElS hae preacnted odaut the mofsturc vtress being due ta the eiumer mnnth teut yetlod. Furthermrc. It has been ceta- blluhed !n ane controlled tee[ 1n Cnllfornia thot bntterfa treveled 232 feet through soll. When pruparly denlgncd, draln[leld ayecear can dia- purue the vaecevoter to the eKtant CIIOC [AC 801l IH nn effectlve trent- • _ mont mechenlem. The usc of tertlu[y treaement to deflno trentmenC tnkfng plnce In soil blo- . systums, is, misleeding. The un4nome tavolved 1n thfe ayctem preclude the aDlllty [o Acflne the end produce at any glven time or undar dif(eient laoding retee. c. Measurea [o Yitlqutc Adveree lmpocte Pog¢ ]03; , 'nic sreCeme„t ld msde that °Nltratea are the pollutnn[ of grestesc cencern ^ It is important to note that most other constituents in the eflluent from from cha dlepocnl of veate vuter effluent !n aub-ourface drnlnftelds lo- seWag; treatment systems are subject to signiGcant removal as they pass -cataJ avur the oquifer." Tha folloving quote from the 3umaory end Cunclu- 1 cloae of the Ideho Pnnhnndle Heplth Uletrir.t tlo. Craund Hater Quallty through the soil column above the aquifer. , Nanitaring Technlcel Neporr, la unothec vteu vorth notfng: N1CLp6P.9 have tradicloaally br.en the flrot componene of sevage to IV mnnlEeat ltcclf Sn ground-++ater. 7'his ls due ro the Pact thec they (-l nre nlghly eteble and extremely wElle etnce they dtacolve eeelly • C) in vaccr. Itlgh nitrate levela ere not aaly n public henlth haanrd, buL are aleo considered hnrbingerc of other r.onCeminatea from the eame nource chat are lese stable, leaa mobile end require o longer perlod of crnnsport. r • ~ ~ ~ ~ i ~ ~ ~ ~ • , r U.S. ENVIRONMENTAI PROTEGTION AGENCY R E G I O N X 1700 lIXIN AVEHUE SFATtIE, WASXINGION 91101 nnr zo ' 14,5 443 R E C E I V E~ Sept. 7. 1978 SfP 12 I1;d Spokane County Planning Oeparpnent SVONANE COUNIY North 811 Jefferson PLANNING DEPARIMENI ' Spol.ane, HA 99201 Dear Slrs: 'de hove tompieteJ our revieN of your draft environmzntal impact statement for the Midilame SuDdivision in Spokane Caimty, Nash- inglon and would like to suMiit Uie follauing cooeients for your tonsfAeration. ' N TNe Arnft EIS presents a detailed discussion of geologic structure, ~ the eiater Quality iwnitoring program, and the water yuality of the Spol,ane 4alley - Nathdrup Prairie AQuifer, but fa11s to address a , nuniber af items afiich are needed ta adequately evaluate the impact of tbe proJects upon the Aqulfer. The final EIS ShoulA address the followin9 concerns: l. What is the plonned size of the Vroject, 425, 343, or 415 lots? 28 28 As proposed the residential development will provide for the constnic- 2. The tez[ indicates tAat 21 ar 24 units are already using tion of a total of 425 single family resiclential units. Of this total, 72 units separate Septic tanks. The locatian of these units should have already been approved and are presently under construciion. The present , be indicated on a map, shm~iag their relatianship to the action is for- the lat 3 roval for the balance of the lols which would total propaseA central treaUnent plants drain fields, nearby aff l~ pp site drinking Hatcr wells, and off or on sitc monitoring wclls. 353 UOItS. 3. Proper site selettion and desi9n for the central drain field are important to protett the Aquifer. 'fhe final EIS should ~O provide a detailed specification presenting a map shahing the lacation, size aitd type of treatment plant, a cross•sectian ~Q Please tefer to the map attaelied to eomment No. 63. of the Arain field showing the gravel fill material, depth of undfsturbed native soil ar flne-gralned fill material prior Co the coarse 9ravels and a detailed description of the soil types ar aggregate Deneath the drain field. This action is for approval of the plat and zone change for the proR&ed project. A separate and independent approval of the project sewagc treatment system by the Wasltington State Aepartment of Ecology will address the speafics of the drainfield design. At tliis time the dcvelopcr does not know what type of sewage treatment system will be approved. No specific design or engiiteering information has been developed. The dcveloper is committed to taking any steps necessary to ensure an adequate drainfield dcsign. . ~ -2- 4. 14onitoring wells shauld be placed Detween the drain fleld and drinking water wells and near surfate runoff catch Noted. basins and dry wells in order ta determine any water quality iaipacts resulting from the proJect. 5. Siiicc Uie effluEnt from thls project will not be disinfected, what is the ewpecte<I nu~nber of fetal coliFornis per ml.Z The value will vary wiih incoming setivage concentrations and existing 6. Nhat wi I1 be the design and location of the dry kells or operatuig conditions but should avenge aUout 1500 per ml. catcA basins? Also, what daW is avallaCle to support the 33 statei~ent, on page lA, that the soil column benedth Uie dry wells or talth basins will remove substantial amounts of surfar,e runoff con[amin7nts. 7. Flonitoring systCOis and 34 33 The surface water drunagc plan has not yet bccn designed and is subject subsequent corrective treate~ent should be detailed ta sAoH hori the Aquifer will be protectcA. lhese tO S pCcific review and aNproval by the Spokane County Gngincers office. details should inclutle. laatian of a~onftoring wells, frequenty anA kater quality tanponents to be analyzed, procedures and funding aiechanisms for upgrading the treatment facility, and the plan for operatiny and maintainln9 the treatment plant. Plcase nfcr to the discussion nn pagas 99 through 101. 8. 411iem is Lhe neui tlrinking water well to be locatedl 36 We are entlosing topies of the EDA Interim Primary Drinking Nater Ne9u- N lations - Cmitrol of Organu Chemical Cantaminants in Drtnkfng Nater and [he Guidclines for Review of EIS'z subJecl to Section 1424(e) af The designing oP a monitoring weU program and subsequent correction Ul the Safe Drini:ing Nater Act. ke hope these documents xill be of usc procedures is an extremely complex system dependent upon a number of N tn preparinq environmental inQact statements far subsequent pro'ects. vuriables not the least of which is the waste water manage program that will We appreciale the opportunity to review this draft emironmenWl impact shortl be reeommended b~ statement. Plcase do not hesltate to cantact me or Dennis Ossenkop, of Y y t~e Spokanc County "208" program. In addition my swrr, snotna yau nave questions or aesire rurreer snrorparI oo re9ara- there appears to be considerablc divcrsity of opinion as to the advisability of a ing our comoents. 11e can be reached at (206) 442-1285 or (FTS) 399-1285. • monitoring program. The details of sucli a program cannot be detailed at this Sincerely, ame. • Alerandra B. Smith, Chief EnvironAmntal Evaluatinn Dranth Thc new water well tivill be located in the extreme northeast corner of the 36 plat near the intersecUon of Pines Road and Thuty Second Avenuc. ~ , • ~ • , • • • • ~ ~ ~ ~ V ~ ''InI"'l UEPARTAIENTQFFISMERIkS August 30, 1918 ~ECk Ivk Plr. fretl Qaph2rsh, Director , • Spokane County Planning Department ' - Hm•th 811 Je(ferson Spokane, Hnshin9ton 99201 P19H, ~:''N;r „ Dedi' th' Dayharsh' Dr,iFt Environmental ]mpact Stntement MiAilNnp SuhAiviainn Spokane Counjy_ WRIA T-57 Nc have revieweJ the abovc-described stalement and offcr the following ' tanmient. N h coovcralive pro9ram involvinn pen rearing and release of iall <hinoak No response required ~ salrmn inlu Roosevelt lake is presently undcraay. It is presumed that the W nwcber uf fish involved will Continue at a rathee constant Ievel. Nhile ~+tlual distrihution pf these "resident° r'ish has fwt bec:n fully evalualed, ue as5tnne that they will redidualize in lhe lal,c. Uther anadroimu5 foodfish stacl.s are nat fountl upstream (rcun CHfef Joseph Ilam, thus any iuFpacis firom the Subject proposal to these staks would be unlikcly ' Fish resources fmmd in lotal reaches of the Spol.ane 4iver amuld be appro- priatr.ly addrASSed b,y the feme Oepartment es well as planneQ activities whiCh miqht nFfect this fish Iwbftat. INnA you far thc opportuni[y to revie+t yaur statmient rrhich appears kell orryanite(l aixl clcarly presents Chc prapaSal. SincerFly, , fardon S~nAisorr•' Direttor jS cc: uat WOG r l ~ 5rnrE or pEPARTMENT OF TRANSPaRTATION • WASfIINGTON ~iKMwnn.,~~a~r.nait~ma~cw wd.rsm~9ssa ttMSimn 5~'J D,xvi.:aeW aT Gouurna Augu9[ 10, 1978 lfr. Pred Oayharah, Dfreccor Spolmnc County Plnnnlog Department North Bll Jeffcrean Spoknnc, uaehing[on 99201 ,y Spokane Gsunty •C , Hidilome Stibd[vtelon Ihaft Lnvironmen[al Lpace Stn[cment oenr Hr. oaYnsTst,: Nn response required. Wc have r.ampleted our revlev uf ehe suhJect dotumcnt ortd feel thc docwent edJres,ca adequa[ely tlio lmpoc[s [o either exia[ing ar proposed transporlo- tion CaclltUca ln the arep. Tliaul, yuu for thc opparCUni[y to revfev thla Lntomistlon, Siacerely, N Ln ROBERT S. NIEI,SEN Anelaeant Secretary Publ1c Trensportution end Plnnnfng By; {6N. P.'A1,flp11A Envlronmencal PlanneT NA:rb ~ WPA,VU° RECEIVEp cr N. R. flnrning N. B. Aehford QUG 2 l 1918 Environmentnl Sectlon SPONAtIE COUN" piANNING DEPARTMEHi RECEIVED Auc21 Is-'a PIANHING OEPPRIMLNT ~ 40 ~ ~ . ~ ' ' ~ . • . . . . _ ~ ~ _ ~ • i • ! ~ • • • • ~ • _ ~ . ~rr ~I r-- ~ AIR POIlUTION CONTAOL AUTNORITY L Au9ust 3D, 1970 + aintr Ptr. Frcd Oayharsh, Director Spol.one Counly Planniny Oepartnent tlorth 811 Jefferson SpoY,ane, washington 99201 Dear 14r. Aaylwrsh: Nc have reviewetl tNe draft Environaiental Imq»c[ Statem2nt for the N 141dflome SuDdivision. D(e cancur Nith lhn overall findings of the air Ul quality sectton, with [he atldition o( lhe follouin9 camients: (Jl a) Tlie proponent's intentians on pavin9 40th Avenue ar+e not clear. Unpaved, this ronA could prove [o be a subslan- S 3 It is the developer's intention to improve and pave 40th Street. tial emitter of particulutes. 14e ask thnt the proponent clurify his intentions on this nitter. b) 'de aish lo eephasizc that arith proper dasi9n and main- [enuuce, (wckage sewage trcatment plants should 9ive off 38 38 TI11S 1S COIiSIStEIIt {Vlth 111fORI1aUOil pICSCIItCd 111 lI1C lO1pACt SlatCli10p1. no odors, c) We also ask the proponent to sibnit n anre dr.tailed out- q~ 39 7'(iC detuiils of the dust abatenicnt procedures to be utilized wiA bc line of plans to nbate dwl during construcGion. 3 revicwed with SCAPCA prior to construction. WQ aUPmtiate the opportunity to revfen and conment on thf5 draft EnviiroooienW) Iupacl SlalOment. 5incerely, Flilliam T. Murphy Air Quality Engincer WTI9Il C 5pol~an¢ County ~ Heal[h D6trict W4-v ilOt Coffe~30 Avenue spokone. `Yah.n9im 99201 Septcm6er 8, 1978 ~ wr. ercd nryn.reh R 6 C E I U E D Cowty P]anning Dlrector Spokann County Plgunning Coemleaton H. Bll Jettercon ~ 1 i ~SJU Spahene, uA 99201 SPOKANE COUNlY flE: Midilome tuAdlvlaSon - Draft EIS PIANNING DCPARIMENT Denr Nr. Oayh¢rsA; The Spokme County NeNth UfetT•tct haa rerleYad the drrft environmentel lmpeet ~ etatunenL, Nldtlam Subdlvtefon, prepared by kavoKh and Mderapn, Inc., end has the fo110ving commenta; N In the [ntroductton. Rage 1, pareEraVA 2- the etetemeut ""fhe Drapaeed poctoge Q1 sewege treetment focility anE dlotriDution ayetem ves eDDrored by the Spokene . ~ Counly FnBineera on Mny lA, 1977, and by the Spotane Caunty Hea1tG Diatriet on 40 Tius comment is noted. July 5, 7977." is not occurote. The Nealth D1etrlct epprovnl vea for the "subeurfacc sevega dloQoeal tutlitr" end no other,portlon ot the ayatem. Pu,ce 13, d3 Noter -'fhe depths to wotcr tablc ate shom m 70-40 teet. Our recards shov the deptha to be 100 teat or more vhen qround elavntione are 4 TlC a6p1h to the water table may vary as much as l S feet due to seasonal aimilar co the rxte eirvet►ono. variations. 1Vater table dcptlus to 100 feet would be witlun the anticipated PaQe l$A, lo Water - In general, tnie repori lspllee vater odded to the ground A~ variation cxpected. et th[s site rnachea the aquffer. 7'hta [a net e provad hypotheala. ~ The cn¢ment that nitretee ►re not generally ntnined Dy ooil columne mny be ~A {~hiloeoplileully true, hOvever, LArre lc mo+uting data to eAw nitretes are S denltrlfled in eo119. It 1S tIl1C that available data does not prove conclusively that water discharged to the surface in this area ~voulcl recharge the aquifer. Ho~vever, in Pege 21, 1'ublic Serviccn - You fnll to nddreao edded burden on the Hetlth D1etH et nna other nea]tn cnre. Tne commenta hcre rol►te to ezerenee m some o[ the popo- 44 evaluating the potential impacts of the project the conservative view that such lotlan my nlmadi' be preeent .•nd recelring sarvtcee In the aren. recharge is probablc was assumed. Page 23 -"The sevnge treetmeat eyatem propoeed for the proJect !e coaa{derad the bent evallaEla ond reeaonable•treetment syatem---" 99iia etetesent ehould Le revorded. lc very Ye►l .,r aoc ba the -beat svailaoie" , whue i4 lisbt or 5 A~ 'I'here is little solid research that has been done on potential denitriG- cconomles, etc~ It "y Du the reasoncOle sy3tee. ~t caGon in soil columns. Much of the research to date is not conclusive. It is agreed that there is some research availabVe which does indicate suhstantial ed--n,o- 4 5p3WO 450134%3 tn,.a.n~ruyHedm +562340 denitrification in soi{ columns. R.k 4 ~63040 MINLaWn 4563670 lw,, aav 456-3D07 To the extent khat the project will draw new population into Spokanc 44 County the proposed project wauld proportionately incre;we the demands on the Health District as weU as other governmental services. Housing projects as ' that proposcd are not gencrally considered ta induce growth into the area but merely accammodate the growth that is occurring for otlier nasons. • ~ ~ i ~ • • • • • • The pcoposed sewage treatment system has been determined by the Washington Statc Departmcnt of Ecolo6Y to be the "best available and reasonable" treatment system availaUle. Such a detennination does not mcan that this system is the bcst availaUle at any price. As discussed in the DC[S other systcros inclucGng tlie addition of denitri6cation unit opcraiions to ilic proposed plant are availablc but are prohiUitively expensive at tlus time. SepLeeLer S. 1978 PW;a 2 Yrcd Uayhuroh Al46 46 ternate design concepts were discussed in general as a large array of potential designs are possible. PnRe 30 i3 - Alternate Developmeat Cancepte - Yon do aot lnclude d!!lerent patteros euch m cul-de-eacn, clustero, ete. Io lhlo you atnte the uac ol eeptic tenha uou]d incrcnac pwtentlal for gro~d vnter contmSnatfon, This ,c u, unproved 4~ A~ Bewuse of the impmved quality of acfivated sludge system eflluents over acatcment and doca not eppau Lo De e JuetSfied etatement. septic tanks the use of sepac tanks in genetal may po~; a greater risk fo eaae 31 .'rl,c ~id,a oo nilrogcn Sn effluent ia Questi~ble. 48 ground water quality. Tlie overriding consideration, however, is that low Pn,~c l5,, 03 - Tpe co~ent about efllueot Quallty fron atnbllitatlan ~naa ~e . density developments substantially increase the cost of the central collectioq lagoone 6eing marKlml auet be questioned and quelifled !n vhot rcapecta !t la 49 and treatmenl of sewagc. ' "mrrgf nuC". PaQe 35, On-Sito Wnateveter TrcatonnL - Whrn dlacuaeing ettluent qualltr, epectry 50 The data on nitrogen content of various treatment system efflucnts is the paromctera. M not sake genernliud atatemnte alnce they mar not Oe true in thla proJeet. Y based on the rcference quoted on page 31. , In ulacunaing elterootlvea, you hare not ineluded vateruae restricifon devlcee. ' 19iebe cui h~ve conaideruble lmpact. One euaple: In the c.ee ar 4 Zs-acre aite N Pur uesnp.c ingooaa, this acreege can Oe reduced ovcr oox. The eFAucnt frorn stabilization ponds and lagoons is higli in suspended solids and BOD wluch often makes it unsuitable for discharge to surface water. P ~ uRe 93. Tnb1e - 'Ihere le on error !o Wdition aod 49 v octlon. Totsl applled voter In yeor ?.0.0 should read ":i6.00". Pnxe 96, Chemlcel Storoaa Truieport. md Uee • the etatment "doea aot e:iet" A 50 Tlus comment on page 35 is a general summary of extensive data that is , 1a loo atrong; teeke from etorage tnnke and truok accldeols could reault !n Nel 53 ineluded in Appendices A and C. ail apllls. Puaa 102, Sccund Paragnoh - Tho drsln[leld le DJologle411y aetive m the aevege cunt(nunlly adAs bacterfa md nuLAeota loto n sult,eble environeant. 54 The use nf water nstriction devices can be very effective in reducing the quantity of sewage that must be treated. Such devices were not addressed in Yery cruly yours, the DCIS bccause there use is not within the control of the developer or the Ov,~~MINraL xraLru o,vIsloe reviewing agencies. Therc use is almost entirely within the discrction of the individual homcowner. Edrsrd N. Plckctt, H,S., H.P.H. R E C E I V E p Director 52 This correction is noted. ' JL~ I i Iyl13 !10 SPONAaE COUNIY 53 This comment is noted. PUNNItIG DEPARfMENi 54 This comment is noled. - ~ ~ RECEI "d SeP~mbO.d,19.,d T0. .4r. Frod Dnylwroh, Ulr"p;11 COUN11' . 5pukane Crnmty Plenr~~K&Wtp@ppR1MEN1 FHUM: iury honnely, 1'lanning arud Trufflc Dlvlalon Englncur SUUJFC'f: Areft E. LS. Nnvleu; Mldtlome Sutdlvlelon - ClrciQnllun aid ?rafPlc OperaUona 0 Tlie folloutng comments aro provlded for your reviau ocd coneldere6lon: P. 7 Imnnct Stimnxrv: IMnCrlutlon of TM NMWSeA Actfon.; Peregreph fuur indtcetee no eldounika are propoeed, Preaent Counly pollcy Sidewalks will be provided by the developer whete they are required by Cowity tegulalion or policy. The use of sidewalks is also included as a Sncludoo eiaa.aik cwneLniclton ulong tirwriai roLitue, lnciuai~; nolghtwrhood recommended mitigating measure tivhere necessary to reduce traffc congestion coLoctur erwrtol~ 1n uut~itrleionu. Stncu thts projece ~o eowidud on all tour 0r avoid potential lraffic safety risks: Sidewalks would be particulady N atdus by usthor exiettng or propoeed ert,eriels, aidewlta ahouid he included uo important in the viciiuty of Chester Elementary school as noted on page 121. ' ~ lntcgrnl ~~nrl uf roadvey duvolopount. c,. 36 finuecl Siwiwirv - G. TrennuortaLlon/Clrculaliun; ~ This clarification is noted. SWte Iligiiuuy S.A. Y/ (StaW hl6liuny purtlon oP Ylma Huad from lGtb Avenun norLh to lnterstnba 90 (S.R. 90)) ehould aldo tw listed ae e prlowry north-eouth trufllc cerrtor connocting I.o :,.N. 90. HolLhnr Pinee Ilnud nor D1ulmen.141ce kond provSdc Alroct eccuee lo S.U. 90 but do provlde dlrect occuse to S.M. 71 nni Lho Arganne--Wlen couyleC ruapectlvnly uhlah in wrn do provlde Jlract eccena W k. :1 ProLxGle [wnacl ot thu Prmannnd actlon - E. Trnnouurtn6lon/ClrculnLlnn; Same commene en pegn 9 couoent rcgsrdlnq efdauelk conetructlnn elang See response No, $5, urterlalu. o. :7 Ftuusuroe ta M1L1cuW Advorae Imvecte - L. Transiartutlon/Clrculutlon: ~ 58 ping lhe pro)ect site at a substantially To dete conpooLfng progrmms havu not Gocn eupporWd by tlw genniel pnDllc end The potential i mpacts from develo conccpts uould Iwva llllle lmpect on mltlgeLing lhe trnneporteUon leyace genorat,ed by thls lo~ver density are cUscussed in the Section on alternate development . at page 30. • . . ~ ~ ~ ~ ~ ~ • • Frnd [)eyhareh -z RECEIVEp Nu; Mldllomu SubSlvielon - Circulntion and Trnfflc Operu6lona , SkP D h 1978 SPUNAf1E COUIIIY ' proJect, Uy Incrauaing thb size of loLa rud thorsby roduEl0,fiIpl6Cn0f1MAIU$SIh3La, thn reeulting amountn of gunereted treffic end impscl on bdc e:iettng ro+d eyyu+a ulll Iw rodueud nccordingly. p. 113 Elecentn of Mimon emfronaonl Tronnoorlellon/Clrnilaclon: Smma comment ae for paga 16. See response No. 56. p. 114 Bnoa sap uhould be correctml re: County roxd na¢ca and 56ete hlgA- ~0 uay deelgaallonn. 60 , Blake Road should be omitted and replaced by SR 27. p. 115 h. TM proMhle Iauact aY the Propoeed Aceton: 8emr, canmoal ea {bga 9 aomuant regnrding eideunik conetructton along 61 . N C, See response No, 55. (j~ ertnriele. lp ' Gonural Commant: on o porUon o! Ltw proposod Pino iloed frontage end on flii ur ci,e pwpuaed 62 62 This comment is nnted and has been called to the atteniion of ihe developer. qUth Avnnua ftontagu only e holf - 70' uide - rlgAt-of-uay le et~oun. In 6olh ' • cnsas a full 60, vldn rlCht-of-oey plue full laprovnmen6e ulll ba required prlar to yrocuealnQ a flml plet praposel for Lhoea tKO a}wcSl7c omea. Alsu, an e portlon oP ttw pro{wrty loeeted lmootlletoly eouch of tNla propoanl n prellalnnry plnt i£ 10860 Nalloy AJdltlon, hoa Eeen nviaued Ly lfm Cuunty Commlasluaeru. Tho rood doefgne of thc two prapoaale suac Iw cumpallAlo nnl thore mny bo u need to meku deaign adfuetaonte 1n thlo yro{aeel to obLnln ihln conpet- lbllicy. ~ R E C E I U E DSeptei~ber 8, 1978 ,,l.P 0 9 1978 1 1010unnnur+ , ~ pI pSI)O~NNA(;AEn CpOpIIN[f~AYNt - 1fJ. ,~i(IQI;b15A''~Y1IhT,y'f1fAf(fl5T(~~1rPp1Yt111P.11[ I'11019: Nilliam Uobratz, Assistant Counry [ngineer SUVEC1: DraR Enviironmental Stotenient for ~ Midilmne Subdivisian The Spokane County En9ineerin9 Denartmenl has revtewed [he draft E.I.S. far hlidilome Subdivision and Suauit the follrn+inq and atWChed coments for ynur cunSfAeralian, Pa9e 12. Plat Qesign M~ip: Ido areas are indicaled far drainfields The plat design provides for the placement of the drainfield in the The map indicales hause lots, however, 6.5 or 10 acres of drain- 0 u southtivest corner of the project site, as shown on the following revised map. N field is rcnlufred (based on 6 ar ~ 4 9allan per lineur foot, respect- m C) ively, for (trainfield design) Page 57, Water; RunoffJADsorption: Sections 2 and J are both mis- 64 6l~ Spokane Cnunty policy requires that the storm ~vatcr drainage system be leading They are U•uc for Ihe desSyn StOrni (10 years) but not desigmed for a 10 ycar storm. The spea6cs of the drainage plan have not yet true tor any size stonn other than tlwt, be it a one year or one been developed but ure subjcct to specific review and approval by the Spokane ntinaree year scoml. County Engineers Office Na9e 102 $ludge DispOSal: If Spokane County operates and maintains the lreaUuent system the slud9e Hould not be disposed of at the This clarification is noted. ' Ctty of SpoAane TrealatCnt Facilities but would be token to the County slud9e disposal site. The altar,hed memorandum incliule Caments on Cirtulotion anA Traffic, and GrounO llater impacts. ~ • • , 0 ~ ~ ~ • ~ • . ~ ~ 32`D AVENUE • ~ PROPOSED WELL SITE • ~i'Y . i Existing Portion ; f , i....~ ~ . up; Midilome Addition a ~ W ~ ~ H ~ 0 3 Z • ~ ~ \ ~ ~ SE1~'VAGE TREATMENT PLANT :k:•~• : • : ~ ~ . ~ DRAINFIELD SITE , . . ' 40TH AVENUE ~ i ~ I~ i S'TE MAP , ~ ~ . ~ ~ ~ il fti~~R::°f i~t~! R~~~~. i r' . 12`~`~ ,^N L~Jtlji~~f,i~l:s t': ~'.17':'IrrlarllJ! J•7.71... .:'f..'r.l.,~ :1.• Fftt ~ 7 • 261 . z 1040ltAtiltiul SPpteiiber 6, 1978 10: fred Oayharsh, Lounty Planninq Qept. RE C E Iv C D FROM; Ray Card, '208' Study Prograin Manoyer ~Ar' 0 8 i7i21 SUBJL'CT: Onitt L'nvironnkental Impatt SWtement, SPONAflf COUNIY Midilouv Subilivision PIANflINf D[PNflIMCUT I navc revicweA the abuve Envirmumntal Inipoct Statement in relaUon to An cxtensive effort w15 made on the part of the Spokane County ils authen6ic'iyty rc9arJing 9round wuter irttpatts and data Dtcunwlation. I iind Planning Department and the environmental consultant, Haworth and Ander- eotn W bc sonieuhot outdated and confused. Thts office has offered ifaHOrth d son, Inc. to ensure that the draft E1S included all available data at the tirne hiulerson any dala He heve at aw• disposal yet the fnviiroronental Impact SGitement that it was published and that it included no factual enors or omissiuns, ncluded in t~us effort a specifc request f~r a pre-draft consultation with all only includes data accui~mlated Auring the dry sr.ason of tlie year. Ibre specif- lstate vid local agencies and progams with an interest in gound water quality icai iy, iny t•evieW coitiriEi,cs are as ronoas: and how it might be affected Uy the prnposed project. Mr. Card as manager of Pa the "208" study prograrn for Spokanc County was included. In carly Junc, ~~c 12, fir5t ira h N c~ 1978 Mr, Card ~vas provided witfi a complcte copy of all sections of the DEIS ~ This entire pnragreph necds to be updated. Fur exainple: sre can verify 0 re(Cilll~' t0 WatCJ QUaIIty a(id SEW1ge liCat111Cf1t I11Ettl0aS 3fla ICqUCSteII Uy t~10 N rEcnarge a„d Liic 'zoe' aoa usrs adca ai•c noc cooriicting.• Spokane Planning Department to review the same and submit any comments Jw- 17, enlire u,iqe and tables on m). 78 and 79 he mi6ht have on the scope and factual accuracy of the information. Written rniS inforaiation only includes (I preswiie) deta from U5G5 files. (liere are 68 comments were recf:ived from a numUer of agencies but none from Mr, Card Other data ahich tllustrates thal other canstiluents nre in exte55 of drinking water or any other representaUve of the "208" program. On June 23, 1978 a meedng was held by the Planning Dcpartment to rcview the matcrial 5~anaaras. submitted by the environmental consultant and the commenls received during Paqe 81, i «gil 2 the pre draft revicw process. This meedng was attended by Mr. Card, as a The tehulation in Appendix B does nnt include all available chenncal data. 69 representative of the "208" program, anci by representatives of the Spokane Thc '208' ffeld daW is not Icss rel iable than other data. Cmipansoas can County I-[ealth District, Washington Stata Department of Ecology, Washington Statc Department of Soci~l and He~lth Services, and Spokane County 70 i,e nw,de by a correl~ited auaunL The correlatinn coefficicnt Getwem the results Engineers. At this meeUng b'Ir. Card indicated that the "208" program sccond hum 'lOtl anJ WSU is qreater ii,dii 0.99 wh;ci, inaic,,te: couipardnie rei,an,i,ty. half aquifer sampling program had just been completed but that the analytical Fame ei, itEw 3 results were not yet availaUle and that he could not rcleasc the data until i doii'l ayree with the hrs[ ,entence. mid-August, after it had bcen revicwed by Mr. Csvelt the program engineering consultant and their technical committee. Mr. Card indicated that tl►is informaGon was taken during what is termed the "wet season'.' (i,c. January tluough June) and that it might be substantiaAy cliffercnt than prior data.lt was agreed by Mr. Card, as wcll as tlie otlters at the mecting, that this data wl►ile not available for the DEIS should be included in the FEIS. Scveral subsequent contacts with bu. Card and the Spokane County Prosecuting Attorney were made by the plnnning dcpartment staff and cnvironmental consultant. It tvas concluded that the publication of the DEIS should proceed and that any additional data that became available would be included in the FEIS. ' • ~ ~ / . ~ • \ . ~ • / J The DEIS contains all available watcr quality data and included a revicw of a11 prior studies and research rcsults available at tlie time that it was published. The DEIS did not include the cesults oP "wet" season sampling by the "208" program because that data w:►s not published nor available at the r time'that tlie DEIS was published. Appendix D, included lierein, contains an addendum to the water quality section of the DEIS and includes information madc avuilablc since the publication of ihe llE1S. Va e E6, third uaraqraph The author has confused tlie '208' depth selectivc sampl ing with tlie USGS 61 Please refec to Appendix D, included hetein. Sampling pro9r,tm. The USGS atte+npted only one exper(nent in depth selettive sainpling: This ended in raiiUre. ai,y ocner aevut seiecc;ve Saiiipling Was doi,e . The discussion on page 77 and the data provided on pabes 78 and 79 is 66 not limited to only data from U.S.G.S. fles but is a summary of data available by ciie 'zos' field creH. fmm all sources at the time of publication. In addition to U.S.G.S. this Dayes 86, rourcn ara ra ii . includes duta from the United States Environmental Protection Agency, an(i ton or p2j Washington State Uepartment of Social and Health Services, Spokanc,County lhis infonnation is erroneous antl out of date. Health Distfict, Spokane County "208" Program and a large number of private ~ Paqe 94, Proximity to Water Snpulv Nells ICSCaTCII StUdl@S. The audiar should rCwrite this sectton to reflect iiqre up-to-Uate thinling 74 N ot, tne floa charactcristics af the aquifer. The data tabulation in Appendix B does in fact include a11 avaulable ~ R E{ E ~ ~ E~ cliemical data that ~vas availaUle at the time of publication: During an W interview with Mr Card on Septembet A, 1978, he indicated that tlus 0). Iu'o comment was in reference to the failure to include "wet" SeaS011 "248" data. svoKnNt courIn. Tltis data was not available at the time the DEIS was printed but is inctuded PtaNUiNG utrqRrfAfljr herein in Appendix D. . ~O The "208" program 6eld data for nitrate-nitrogen is the result of analysis of water samples using a speciCc ion probe. This is not an approved EPA . reference analytical techniquc and is subject to significant calibratio,i error. T}us is documented by Mr. Esvelt, the "208" program engineering consultant, the interim watcr quality monitoring report published Uy the "208" progam in Febmary 1978 on nage 5 as follows: The mean ratio of Nitrate-Nitrogen obtained by WSU (autoanalyzc;r results) to that obtained from the "208" results (speafic ion probe) based on 204 duplicate samples, tivas 0.75 ' with a standard deviation of 0.13. However, a period itom November 14 to December b had a ratio based on 40 duplicate samples, of only 0.64 with a standard deviation of 4.16. The remainder of tlie study periad, with 164 duplicate samples, , showed a ratio of 0.78 with a standard deviation of 0.10. During the pariod from Novumber 14 tluougli December 6 the Nitrate specific ion probe being used •for the "208" ficld results was apparently faulty which led to abnornially high readings. - , Through a statislical analysis of samplcs run using field testing methods and duplicate samples analyzcd at Washington State University a correlation has been developed whereby the field data results can be correcled. The comment tliat these corrected field data results can be used for comparativc purposcs is not disputed. Thu sentence is introductory and qualitative in nature. Specific data on chenucal quality variations is included on pages 82 and 83 and in Appendix A. sep`. e, 197A R E C E I V ED The first sentence of the paragraph refcrs to the joint sampling of the S~EF' 0 r 13;~ depth selective weus by "208" and U.S.C.S. U.S.G.S. conducted its own hT. ?rod Dayhnrah, nire«or separate sampling program only through October of 1977. After that timc all spokane Counly Planntng Dept, SPONAtif P. 811 Jefforson OEPppIMENf depth selective sampling was done by the "208" S13ff. However, 1'Vlllie spokane, OA. 99201 U.S.C.S. discontinued its separate sampGng it continued io independendy SUDJbY7 - UAAFT EIS OA M1Ull(YB SUBUI4ISi0.v . Al13IyZC the Sa111pICS 1t 1tS I;lUOCJtOI)/ 1T1 Se3tU8. The paraguph refers tn the par-ate U.S.G.S. analYtical results not to a separale sampling program. 1. S1nce we're dealing wtth an EIS tor aa 'efter-tho-Pact°' proJcct, comyrieonn are se eapaclelly he[d to caputa, 1 tiare arrlred nt fust euch velld caparleona Eq using Coth maximw ard eromga serage flov M!a gtren se Or tlro Spokene Cauntr Nealth Dfet, Maxtmua gaaion, per ea, rra e tnree o,aroo..ro saia to ne qoo. If the 52 nmee This information on the results of depth selccbve sampling includes all preaently an the exfettng plent (w1tA 9400 ltnoar reac or aroinnaie) war, ~ ~6 data available at the time of publication and was factual at the time. The Indlvtdital eeptle Gnke they rw]d caqulro 9360 llnaor feot of drnlnffeld. The loaaing retea nre cnararara sg,iions per llnear foot for aeptlc tenta emi 6.3 "208" wet season sampling indicates a greater degree of statification at some N gnllono per ]lnenr foot far the piLckage plent. Using the aeme 52 haes !or cmrarlaon, CY) and 6aefng tt~a doalgn on nv 111 Plare af 350 ge]lone ~r aa, ~r n~e, Y~ w~la timcs of the yeaz. Please refer to Appendix D for com~letc infom~alion. ~ lave a landing rate of 1,9'per ~Qnenr foot w11A eeptlc tanku ard 2.4 y,allans per 1lneor faot vtth the packega plnnt. To hendle oaxlaw Plwa for the aain 52 hmee A tt wau1e requlre e 900 qpd : 92 hmea or 46,e00 gpd rutentlon caFactty, Please refer to Appcndix D, included herein. 'the capleted projoet of 425 haea, le order to p^orldu the cqufvalent carecllr ard . , dretnfleld ladtng rate of iMlvldual eeptlc Unke, rauld requfre a p]ent rtth a capaclty to Mrdle 382,500 gallone por dnr and 76,500 llnear feet of dzalnPlald. The llLIS dces not address an "after the fact" pIOfECt. The project Propoaels we've Aeard sre euEetantlally laee snA muet Ce Macd upan nrnreyo [lovs mther than poaotEle mexlmuae, te tAfa s mlie conelueton? 15 reviews an application for approval of a plat and rezone for over 300 housing z. vny ero aganciea allaing a ututs that have not yet been approved. In assessing impacts the entirc project, nuh~tantially a~aller etete~ w1tJ~ e hlgRer laedfng rata fra n plent shat wlll tw putting out lerge qwnqtlea of nltratea an1 othv 17 including the 72 units pnviously approved, was considered. cheslca]e with n Aigh volwe of vater ae e carrler? Ifon t euch e dtaelurfa, euotelned aar Ierysar pertode ot t1me tlan aepttc tanka, caunc hydrnullc wer. ]mding of eoll ratar holding ea{meitr9 7O 0 3, Alanae do a rslld tamparleon of the Lrd areo requ/tad far drefnflelde Por 425 The si2e of the drainfield for a parUcular sewage treatment system is 1nd1r1dunl aeptlc tnnMa and the area to ta covered by the fully coopletod pneknRo plant prapoeed? ~ based on the design tlow rate af the system. The design tlow rate is based on ' a. YIy !e cnere no eica aap ahowing praeont aewme feclltty conetruetlon aM an engneering evaluakion of the potential uses of the system. For single family anotner ehwing the territary eoveroe er the [ullr eaipletee eretes tor the 425 QO residential uses a value of 300-350 gallons pcr day ~~er unit is nomially used. hmea? Tlus is not an "average" use but is considered typical and generally considered 5. Thero Me been no aentton of pzopoeed landneaping for tlw dralnttelA eraa ~ to ovcrestimatc the actual sewa e enerated. Thc 900 lOIIS uotedin Ilie who would do M&0 on gra~Me. Is anytAlnR plenned os wIll it reoaln cwered rlth 81 s g q "d`d°' comment is not a maximun flow rate but is the required siZe of the septic tank 6. Haeo ara already In rtth no lwffer eree. Ien't any proJealad or do you 1nteM for a typical3-bedrooni home, to bufld r1ghL up to the plant'+ Mast ecporLa eanelAor S00 feet a bare dnlowe for x/ sysce.s or tnis trva. u~ 7. Helghhare are alraady emplafoing aDwt the nolee fram the pupa 1n the eRfetthq plant. Na aPten do ~naY run? Any aocieel readtrysel Oaes all aew~n raYd eo ee p~ Fot a 3 bcdroom home Spokane County Health district requirements lifted to the plnnt? Is preeant pwer coneu~ptton Dcing metered? fe valuQe {eeatng Q ~]7 through the pl~nt ~efr~g ~eteredt Io any teatl~ requtral ec present? 1 I mandate a 900 balloi~ septic tank and 180 feet of drainfield. Dased on a design flow of 350 gallons per day this yields a loading factor of 1.94 gallons per foot per day. DOC requirements for packagc treatment systems mandatc a drainfield ' loading not to exceed 2.0 gallons per foot per day. IIascd on the ubove thcre is no signiGcant difference in the loaJing on the sail between the two systems. ~ ~ ~ i • • • • • • • . - ~ , 18 There is no reason why discliarge to the package treatment plant drainfield would occur over any longer period than from septic tanks. As P8, 2 noted above in comment 71 the drainfield requirements for both systems is 84 approximotely cqual. 8. Yint aro tho teat reeulta Pra the "208" etudy of the Certuante rell ,Juet nwtA ' of the plat? y. Nill the .osc rocent •zae• aata on the Choeter srnn epoclftully be lncluded ln the Ytnal 6IST 85 The sPeciGc loading nquirements are gven in comment No.77 above. If individual sepdc tanks were used in the projcct it would not re 10. Contrery to cauent an pege tb, the flrst plaee af the plet le elreadr Da1ng Quire the set eervad by Malol Irrlgntlon, Heen't the enttro 160 ncree been anne:ad ny Moie11 86 asidc of approximataly 10 acres for the drainfield site, and woulv result in the Ylth the ereeendoue 1apneL of An addltlon+l 1400 yeople rho ie going to pay far addition of about 25 to 30 additional residential units to the project site and e naw roll, trenenleafoa llnee nnd e new Roldtng tent tor en elroady overtexed eretem? tlieu appcttenant druintields. ti 11. Yhr no nentton of the fact tlut Model Itrlqatlon Aad to ehuL down one of 1ta re11e due to eontSnunl coltfozm Edoterla eonfasfnntlaa? TMt eeae well le naybo Q7 _ otro helf sila nortAwent of the Mldllme plst in the ganoral dlroctlon of fla of Y J the equlfor, 80 I'lease see map attached to comment No.63 above. 12, Doaa arer got to rrlte oft plant depreclelton end, lt ao, what doon Lt asount to? 88 9uch llais eAould be corwlderud la 4 relld ca3t eaparlson of wptlc Wnke aid the jeckege plnnt. Landscaping of the treutment plant and drainfeld area is ro osed b 13. Yon't anyone admit tAeze'e e ecaeanel poMing qroDlem tn tAe eoutAwest corner 89 P P Y of thfe plat, near the treneeent plnnt, 'lYts whole ncSgAborhoW ica skstea theie the project developer. Maintenanec of the facility would be the responsibility evety winter, ~O of Spokane County. . 14, Mlth 1DL of the plat becaing liperrfoue due to Du1)dlnq eni paNng, rhat aro < entimtea af lncreaead tunoft tram 160 acree Mith aven a Mlf incA rainfall ar ~ enw aelt7 Yan't drrwella sotually Lecme lnjectian xelle to the nqui[nr4 ~ 15, Yaur coopaHeons are not coneietant ns yai aaeatfees uae t,ellone eM cuefe teet The comment is not clear as to the purpose of the sug,gested buffcr zone. at rater tnurctdrgmely, el] cajerinmm of eorditlone muat De lacnlfeee ne ve ^A 82 Spokane County He~lth District regulation prevents the location of any public nre 1 n a germtnl eres of rectxege, flood hsuM aM h1gh nitnte readinga. Ye y~ eeo 1n the ~nrglrol area a? the deslg~elcd eole aource nquifor tMt gete le~e te el well within 150 feet of the drainGeld site aod t}te location of' any private ~vell .ixIng end there[ore e grsster huildup of contaAlrtsnts. Plueoo don't capue flaa !n thta ►rea to totel fla af the aqulfer ae fou're done on pnte 19, within 100 feet of the drainfield. AnY buffer requirement necessary for public 16, nas the dratnfleld deelgnad Por the pcaLga plant ellaed !cr reetlrg or aactioro 93 health or safety reasons will be adhered to. ta pruvant wedmding? If eo, rlal will the landing rete bo an araae fn uea whan othoro nn shut doMn? If not, rwldn't eucA n deslgn provlde a lonqer drainfield ' 11te ar do yau feel the praeant eyetea can take the eueWlned use lt wlll got• ~t Hnva you only ellaed ono drelntleld repLceonnt nrea? A paekaRe plont Sust ncrasa Q~ Ambient noise readings were taken at several locations adjacent to the Bardieh Pra Mldllaae (AloM 9ubdirteion) Nd to nplace fte entlre drnlnffeld ln %IG 0 CC~ S1tC, One site ~vas located adjacent to the c~tisting sewuge treatment ahaut one ycar eM nd hae no edditforul epLce aratle6le If the socoaf one falls PIOJ .s tM lote Iwve all been Aaveloped, plant, The noise levels at that site did not excced the recommended values for 17, Ie nnyone comlderlryS the ctuulallre lspaot of the ASgA Qem1ty developaent !n 96 residenfial areas. Excessive noise is not typieally a problem ~vith activated thle 1lrllad area or in bch proyoaal looked et Sn leoletton4 ' • sludge systems. ' ' ie, Yhet le the nlternete plan if wa nplAly reuch the EPA cutoff ot bpp nieroca A~ Specific information on energy consumption and volume are not in our local volle? Cire ua eome ralld coet aetLntea far denitriflcatlon of Doth ~ aeraga and drlnking raterl Is iL tocAnically foenlEleT Yho rauld mr? available at the present time. 96 84 The Gerimonte well is a private well located south of the project site. It was not sampled in the normal course of the "208" watcr quaGty monitoring program. It'was sampled as purt of a special cause and effect analysis dune by . the "208" project staff. Tlie results of the ficld analysis are sliown in Appendix F. , Yes, please refer to Appendix D included herein. , ~ p The entire project site lias been annexed to the Model Iregation llistrict p6 by action taken on December 20,1976. All new facilities reyuired to serve the pa. 3 ncw proposed projcct will be paid for by the project developer. Therc will bc 19. Thore wea no sention ot the 3impsm Bnglneers aretta porcoletion teata for no adchtional fmajicial burden placed on existing District consumers. 11 1d11me, Nethar llan rapld peneeb111ty they faad lw to nodente penetratton 99 of the Spririgftla eolla, TA1e polato at qulta olearly the eerore oeeaannl vsrtatlona ' In our aolle cnpnb111t1es eod ehauld he puDllahed rerCntis in rour final draft. [e the plant dnaign tnaed on the on-eite taete ar the uni&] vague, genarnl ~oo The WCu refered f0 W:1S flOt shut down c~UO to colifonn bacteria gufdellnea? Alco, there rae no vontion of the U.S. Soll Conxnatlon 9arvlce boaklot an finglneering Llmltatlonn ror Spolmne County 9otln rAleh rarno thst Sprlilgdele nM contamination but because it went dry. Ttus has been confirmed by the Gerriaon 9oiia tavo apounci.l ror erouna wacer conc.Ainacion, Spokane County Health District in a written communication from 64r. Cdward 20, Bsaed upon SSnpeon perc teete couldn't we potentlellr Mvo ueuage ourfnMng 101 P►CkCtt, DIICCtOI. Qurfng hlgh satuntfon perloda of the yenr? 21, len't !t tnu the local Nealth Metdct appravea peekage plante Sn "higA denaltr" ~O~ develo}monts for unepaelfted "econaaic" reaeoneo not Eeuwe of any eoperlorltr in ~ trestaent or envirauonUl proteMlon4 Mlnt 1o palaary utder 9BPA1 Depreciation is merely the amor6zation of the capital COSt Of II10 22, Yho deterotnee wAat te the "beac nrallnDle ane raneonvele" method M trmtment 103 88 equipment over its usePul life. It is concidered in the comparison of cost !or n qiven locale eid hw 1e ouoh a detetutmtion mnde7 estimates of various treatmcnt systcros. 23. 9eptle tenke wlth dry llnee (eollection eysten) 1o om nltern+Hre not mentfonnd, ~oA Yhy? 24, Slnee ar Spokano Canty HealtA rngulatione alla psring wer dralntlelds, nw 1~he S okane Count lm~d ca abilit ma s do not indicate uny ponding do we kna thie ono rill 6e protectad tra vehlculu lnffic ar butlding? OSNS 1O~j p y p y p reguLtlam sey no Ssparvioue eurfece wer a dnlnfleld, areas on the project site. If some ponding daes in fact OCCUf It Wlll bf; 25, MHS PuWldtlon I77-1 "On-91te Sereqe Dlepoeal Prq;rnm" (Mey 1977) hse an ~O^ considered in the surface water drainage plan for the project. lntereating caparleoa~ of eentod arotuae eryd aeptlc tenko welghted hearllp In b N fnror of aeptic tanka. Ia the SIS author awara of tAle coapnrleon end rfat are your CY) emzenie ln roeponse to St4 C31 26, No montlon ln the BIS of the esrlter CroeDy etttdr dona for lho Va12ey uttllttoe An estimate of the runoff cannot be made because the comment does not ~hlch fwnd A9S fram datergente at 90 feet Sn the rater laCla. Th1e teating rae e bout one o!]e !ra tAie plat lo the saae SaB wlls aod u~er the Brndlsh Juntor ~O~ 90 rnake any reference to precipitation over a specific time period. The surface Nlgh dratnfleld in leta euuor rhen tt hsd not been Sn uae for eeversl aantM, water drainage plan, based on a 10 year storm, will be designed such that no 27. Yw etate on psge 77, "Flre of the ottes rhere Qr1nk►ng water etandarde lare tOQ surface water in excess of that occuring under natural conditions will leave the Doen eYCOOded ere loeatad in the genexsl rleinity of the propoeed pro3eot alte.,.".' ~ V Gn re etfoN to opente Mith eo marty unknorne in euch sn erea7 project site. Please refer to section on Runoff and Absomtion. 28, 91nco ya queetlon the rellditr of eaie af tAo °208" field teetlaY, do rm ellor 109 tha en oppartuntty for reDuttel? 29. Contrery to yar oamente tlat long ten trerds era not epierent a recent Thcre is no reason to anticipate that water disposed of in the dry wells on eteleaent 1n the peper Dr Lrrr 8nvelt wys ther aro. He ehould 6e conlseted for „O y sitc would have a dircct and immediate path to the groundwatcr table. The the moet recent enlyels af "209" data sdd the lrende tAat hava becae rtelCle, water table in the area of the projcct site is up to 100 feet in depth. ~Vater )o, 7he te61e on pnge 62 doee not lnalude County Health rell date glven to the Counly ~~t (tISC}13I d subsurface will te subject to significant capillary forces ~vhich tiviU Caulaelonan on mello teeted near Mldllme, Sae teeted nt orer 4pp nttnu and ~ ~ one well wao oaly IS teet deap. Thie dete fe all Sn the puElie record, result in Uoth lateral and upward movement under certain soil moisture 31, Ma rant oollfon hcterln dats Sncluded on page 91 Fartieularly bocsueo, ot the conditions. T'he movement of water in the soil column abave the gcoung~vater elaeute of the Nodel weu, is a very complex process involving many factors. 92 The comment is not correct in its inference that the terms "gallons"and " cubic fcet" are used inlerchangably in the DEIS. 'Che terms are both a measure of volume and are not used interchangably. The flow in the vicinity of the project site is not compared to that in the 93 main body of the aquifer on Page 19 or anywhere else in the DEIS. Speci6c reference is made in a number of places that the flow in the vicimty of the +1 • ~ • • • . ~ • - . • project site is lower than that of the main body of the aquif'er. Piease refer to Appendix D for further specifictiinforniation. 94 Yes, the drainfield design provides for the resting of sections of the ° drainfield The loading rate on the balance of the system wl►en a section is 32, The only effluent aantfonod !n the chert on pngo 93 le frcr septlc tenka, WMC resting will depend upon the amount of drainfield bypassed and the effluent ehout n,taeraua othnr eyeWe enA thoir eontrlDutione? le it thot va roolly don't knw hw much package planta and ceeepoole dto diaclnrqing becaueo we Fwve no data diseharge rate to the drainfield. and raqufre no Ieatlrg or manltaring7 73, Doee an7 aqancy oran kna hw such effluent eeptfc Wnk/eaeapool puupora diapoae ~~d , of onch rear? • ~T Thc drainfield desipi tvill allow Por substantial replacemelit area for the 34, Although the genanl aquifer [la le eharn co eo northvaat, «,lan'c it aoa to a be flwing swth torerd Pleaf Creek Qnlrwtel 95 sepemie drainfield. and The specifispecic fi recsriofcw the design procedure are by not the l~yetashington complete and State are su Departbjqiectent of 35. rau mantfon teeting Lhet cmild De 9ons as an earl7 wernl~ eretem of inaraaelM pollutante, vhr a+n't auch teating Ee wndstory in thfe amlroruanlallr senelttre FC0~0~. ' eres7 We Mra heard tMt developere rofnae to slla the USCS to do any tosting ln b hfRh roluae diechsrRe areae, ?M ASEhcst deneltr thoy could itnd wan eae dupleiea rhtch, of caureo, een't eanjare to thase 61gantte lnekllatlono, 36, te 9pokano Canlr going to contlnue to aaapt wch lsrqe Aerelojaenta .itin The cumulative impact of high density resiAential development is being admitted unkean ndraree lopmcta? Me Mrs alrasdy allowod developant eo denae V considered by Spokane County in their update of the County comprchensive over our aqulfer thni 1f the Vnlley incorponied it wald De the 4tq or 5ih largeet 1~8 citr fn tlu entire etata, pli1p„ 37, Vla ,1u3t le.uned another pnclage plant hae iuglcally appcard aerairAi in the N Pxlnted Nllle Subdivielon rlMout the knorledge or nppravel af roepanaibla regulalot7 119 - ~ egenclea al both lotal and stels lere]e. Conetruotionlus egaln preeeded apprwnl ~C S U}iAJ1C COUfIt ~~208~~ ond thep'ro tniklnq abatt requSring another 673 elter-the-feet nnA the Aoueae are v n~ p y , pmgram is Jeveloping a waste watcr ~cuPiea, 7hln ana's tn a ~t~.i ar.►~wss Cme1n lor earraundlryt htlle ud u~e,~wm management program for the area overlying the aquifer. ll is probable that this fra a public xall, J . Yhy dtd the Midilae derelopnr e11oM haea to ee eole nrd xeupled prlcr to finsl P~an will call for a se~ver of some type in the Spokane Valley. Even at the )N ~ acceptnnce of the eyetnm b7r tho Canly 6nglneer's !a rloLtlon of thelr Septemher ~ 20 prescnt Gme, the Spokanc CountJ/ Commissioners have devcloped a draft 29, 1997 contrset'! o~rner etatee tna haee wald not be occupied unt11 Enqlneer'e Kore dolnq MSO. To dete tho syetem et!]] hee not rocoivod Lf~l apyrmel or Nvastewater pmgram for the valley that would provide for the construction of accoptance and le preeently binA opamted by en uneerltfled operstor 1n rlolnllon an interceptor line along Sprague Avenue with connector lines running to the of ACF.'a YAC'e, rne omm«, wo'.e easn toie, io the a"e pereon who fnatalled the pntsent nyates w!lhout tM roqulred Inetaller'a Puxlt, north and south fringe areas. Based on the historical trcnds it is unGkely that 39. Pleeao prlnt a coyy ot the Septeaber 29, 1977 contrect Getueen Ntdiloaa ard tho any rapid inetease in nitrate levels Nvill accur. Couaty Bnglnoer'e eo othere s2y nad the tana theanelrea. Ya feel nn sddtttaml 65 hamee an the exteting aroten 16 a forgone caneluslon ss ttnl !e conaiderod tM 1 trredk ovan polnl beyond rAich tho daveloper eannot bu held roeronntble tor deflelta, untIt a totel oe 11B untta sre an the Ayetemo the orner te 1►abla cor a pooalble A complete analysis of the costs of various denitriGcatioq processes is ;7800 Fve ycar, Ueepite lawe eueA ne SBPA and HGY 90,48 1l epFeere lepoeethle to atop aueh Dletani develapent rhen real estato lntoraaw Imvo uide eny aonetary 122 98 included in Appendix E herein. Denitrifcation is tecltnically fi;asiable but very camnltaent. In thle Snetence ue hare heaM tAta developer's attorneye plend tNt thetr clinnt Ixd already invaated over i100,000 and peaple rare marfng lnto Aomeo cxpensive, The cost of any denitrification systcm would ullimately have to be rhere they stght not be abla to fluah thelr tolleta. , bornc by the property owners of the subdivision, either through higher lot 40. You otete on peqa 99 thet the FackaRe pknt is more eflactlve ln resmLng ~ AA prices or higher sewer service eharges. coltfors tneterfa Dut youc etert on pnge 100 anly glras chlorlrnted ePfluent data, ~,i Ylat xauld the unNloririated count Eo? Cmlnrod ta septic tanA efYluent4 41, ilouldn'/ e chlarlnetod dtoclrrge to a euheurtace dreinfiold tleo kill the bacteria 7ou naed for addltlonal trsetsont? Navan't ther dlecontlnued uea at the 124 99 Soil pernieability designa6ons made by the Soil Conversation Service are Ala,a cmorinator ror eMc verr rnaeon4 ~ general characterizations made on the basis of soil type. Actual permeability will vary &om site to site depending on actual soil condidons. Penneability tcsts are required by the Spokane County Elcalth District and the Washington State Uepartment of Ecology as part of theu nview and approval of thc sewage tn;atmcnt system. ` ~ i loo Thc plat design is not based on soil type or soil pemicability but on land-use considerations. The specific design for the sewage treatment system and drain Geld will requin; a series of sites specific permeability tests.'I'his informa6on is not now available nor important in the design of the plat. Pe 5 42. Tan'L aepefc Gnk effluent v1LA nltragen In lho forn of' ennoNun actusllr Soil permeability is a fuctor that will he considered in the s ic and pecif profarable to thn nttcate calryt frau an necntod eyeLan? Mhet'n the Health Dietrlet'a indepcndcnt review and approval of the sewage system by the Spokane poAltlon on tni8? , County Health District and the Washington State Department of Ccology. 47, Dara the eutAor racqgnlca the vnllditr af the follwfryS hcract quote frm ~ the 1964 Eovalt-SaxLan raport canelaefoned by tIro C1ly of Spokanti toreport on the contnmin~ttan of aanc lacnl reUa---"Ttm vertlcel dlutuncn fram tontanirmtinp L point to the wnter tdeln hae no great signitlcence ln thu case ar cnw,cai It is not true that the S okane Count Healih District a Ck~ conGutrantn, oapociellY whan large qwniltlea of flusAing ratet are tnvolred`p 10/) p Y ppIOVCS p.I ~'C o„e or tn,: Maiia tin the roport wae contaml~etod by chlarldee erao tAough the rator ~ sewage treatment plants for purely economic rcasons. Individual sepbc tanks tible 1n tMt nrea fa 1j0 fee! Cewath the surface ard, to thla day, (oame 23 yeare lnter) it In et111 too hlgh in cllortde to 6n uaod, are less cxpensive than the central collection and treatment of scwagc than an 44. 'Cne firul pemKraph on pego 102 ahould Ec cnauEn to declnro e woratorlum an activated sludge system such as that propased for tlus project. In addition,1hC futuru phauea ard to requlre Inatallatlon af septic tunka for tAme elready tn lhn ~~7 quality of the efilucnt from the ac6wated sludge system is superior in many S2 homee, Dovoloper hne already sWted t~e rould pny far eeptic tankn if lhey vere ~ detemtrroe safer eM roqulrod. ICSpCC1S 10 that from il SCpl1C tellk, Please refer 10 the information in 45. Ilw oftan wiii sl, 28 Appendix D for the s ecific data. udgu haVe to be punpod fra thle plnntl 1lhet rolusoa par yaer? ~ 46, lu tAe City agaln ellwing County puapere to duap eludge ln thuir eyetem? The lao! 1 heard ther wore not, N , 129 The Waslun ton State De artment of Ecol in its inde endent rcvicw Ql 17. ~ feBe IO) you eer danltrlflaatlan of the plnnt fe not feaatble econmlcally, P ~ ~ po r,,vo u, ewe eCOnomtc data on Mhat ita coating other areae tn nttcopUng to saka 130 and approval of the proposed heatment system must make a determination as uater drlnlmble? 'to whether or not the proposed- system is tlte "best available and reasonablc" 48, There 1e no epyroprlnte clto tor e drnlnflald 1n tAa pl►t. The aqulfer So only method of Ueatment for the pro ect. In their approval of the activated sludge , 60 feet hanastA the aurface erd eolla nre eYCeealraly peneehle !n the euuner nM 1 3~ f eewmtea in the ■inter, system f'or.the first phase of the proposed project they havc made such a 49. Wtnt fe It pranantly coetirg to opnrete the one-third oP the plant that'a alreeQy determinution, in7 How eany houra per My tor MA07 Are ihere aq► notera to weaeure flor through plnnt? Energy consuciptlon neaeured? Casta? 50, 6n rnge 122 rw aey an 14&0 agranaont r111 ba exoeuled Lut 1t slzeuly tao, 133 Altemate sewage treatment systems, including septic tanks, are discussed. 51, 'rna cnaxt on page tbz sAaulA lavo epociflc toopirlson dets on epacific eltornatiree in detail on pages 30 thru 35 of the DE15 in addition an extensive treatment propoeed fox thle s1ie. Chart cmparlsona are ueolees ne they eppeaz to Ee vefgAfng i Sndlvldual aeptlt fankn end iMlridun] seroble unlta not saptlc tenke and a 7erRe 134 of on site se~vage systems inclucling sepbe tanks is included in Appendi~c C. conaolldstad pqekago trentment plant, Y1p !a Il~eru no local camparieon at today's coatel $2. I rocqqntze thet econafc caneldarntiaoa are 1mportnnt Eut ] stfll [eel that uneer Lath 9hPA end RCV 90,48.110 protaetton ai emtroament end the ratera of the Il can be stipuluted as a condition l0 the approval of the sewage seace rake r,reoeaencn, correci? ena, eftat all theee renme or p,per wineea, .e 135 @ etill hare no autmiantlal, valid ocanmte caparleon daie, ~atntent sYstem by the Washington State pept, of Lcology that no 93, If DCE nnd Ot1N3 (inge 162) rald not alla lhe Midilde dlechergo to a euKece impervious surfaces shall be constructed over the drain 6eld. The developet MBCO[, vhy ahould 1t ba ollwed into a sola oaurco nqulfer? 36 has no intention of constructing impervious surfaces over a drain ficld and it 54. Don't etatecenta on {sge 162 Sn paragraph urder'Ihble 2 caafltet rlth cuparieon 1 e~~ cati Ue made a condi~on of the plat approval. data in chnrt on pege ~ti? 3 C The specific publicaGon referred to was not utiGzed in preparation of the 10U DL'IS. A large numUer of publications exist on this subjeci, many with conNcting new potnts. ]n the pteparalion of the DEIS a number of publications expressing a broad spectrum of views were cansidered. Some such as those by Laak (sec footnote 8 page 172) strongly favor the use of septic tanks. • • A • ~ ~ • • • • • ~ • ~ i • ~ ~ • • • • ~ lo~ The reference to this res;arch is noted. lo~ Complete reading of the test on pagc 77 wiU indicatc that it is considcred Pg 6 probable that three of the violations raferred to were the result of analytical enor or improper sumpling. The other ttivo violations were of the secondary 55. Tour oaSor eerantagee 1letee on page 164 nre queetlomnle einee rc really tave iron stund~rd wltich dod:s not ose a health problem but has becn estabGshed na leta in Spokane County of ePflclency of oxistl~ syatama elnce pQM rofuaee to ~~O p cmplq vlth ACY 90,48,160 end 162 end put eueh nyatams an Yasta Dlactargo Pentte, o for aestiietic purposes. wfll the avmr of MiQllaa applr to DCS far euoh a perwlt ae reQulredl . SG, I an atteching four oxhlblta with tAeee cmoonta, 7Yo nro popora 1 prnpired 1 39 for e workehop in 1973 nid tAe other tyo rera presentnd to tlw County Cmdesfomen ' nt s 9ept, 8, 1977 hearing on Mldilme, 10Q Please refer to comment 70. N $1, I du roqueetlnq lnforutton on penftn requtred far extmntona oP thie eretam 140 • ene npproral at p1ane. Aleo, what nppenln aro aveilsblo ud Aw .anr aaro ta Completc well data for a number of wells ncar the projcct site are flle? 9lnce I feel the tIS le totallY lnedequste to date, aie eny ndalnletrntlve appeale ere11n61e stter tha Fln+l BIS7 It not, wMt fe prxduro far 1lttgetlan 110 included in Appendix D. The nader is free to make their own interprctation ana ci.a pe:ioa ror riiingz of this data. The DEIS was reviewed by the "208" progam and they have not 58. Pinall f.~ would lllu to Quoto a aoctlon cf Lho SRPA CulAollnca YAC 197-10-360 ~3) ques6oned the statement, "Tt eAould~E6 roneoCorod tMt propoaale deslgned to imprwa the envlrorment (aueh ~ae savngo treebent plants or pollution control requlreaente) uy slno tura adrtlrae enrironrental laFecte. The queatlon at the thronhold detoreioattan leve> >a noc wnowot The data on page 82 is the average of a number of saniples taken over the the Denaflctel aopecte of n proponal autwetgh Ita edrorae fopecte, but nthur iP tho propaeal involvee eny etgntflcant adreree i.pmcca upon tha qwlity of the omlrartsent, ~ gven periods. Complete data on tliese wells is included in Appendix A and D. if 1t doea, an FiS fe roqult~eed. No toet ot 6elnnce ehe]1 bo apylled at tho lhnehold . doternlnetlon lersl," Thia d13 shou14're baen done prlor to eny devalopoenl and it'a apparenl tMre are etill numeroue uronowered quoatlone, N , !n the interest of preparing the concise document, completc resulls of ; ~ ~ 2 Uacterologcal tests have not been included in the DEIS. These results are large Jmn Nonlren in numbcr and arc included in the Gles of the Washin on State De artment of S. 3904 datlinA Ae, ~ p sPokarm, yA, 99206 Social Health Services and the Spokane County Flealth District. Tliey are pubLl"inforniation anif may bc reviewed at any timc.'No attempt was made to , tabulate this data as part of this report because of the vast majority of analyses s re8ect the sanitary condidons of tlte wells and generally are not indicative of the bacteriolagical quality of the aquifer. As noted in comment 87 the Model ivcll svas not closed due to high coliform bacteria levels, 113 The temi "sepric tank efQuent" should rend sewage treatment system effluent The information on package treutment plunt efflucnts is equal to or better than that available on septic tank efAuents. 1~4 Tltere is no provision for reporting such data. The Hydrolagy in the arca of the project site is very camplex. Please refer 115 to Appendix D for more spccific information. 11C Monitoring wcUs can be made manclitory by being required as a condition ~ of the plat. ~ _ . • 'Tliis commcnt is not rclevent to the C1S and should be referred to the Spokane County Planning Depurtmcnt. ' saai 11u3eaa ar.%a,,zi,: as~xn o" '1ATc:d POLLUTI0:7 CU,TaoL° High density development is absolutely necessary if the development of a tiv siru3n CRavA 1960 1 p F>:~c~;;.~•ra;:,rrv::;rr ?~.a;~ -7 3 a;ntral collection and treatment of valley sewage is to be economically i, e,•,,loc-td ,~~d markeLva rne 1950*3. fcasible. It will probably be a recommendation of the "208" progam that 117.41-i11y ovu:dastGG'd an1 rcQuira ?tzavy pw+ax consunotlon, C-..q'i en-i,r.n:,: tn cn4tneartrX ei,tcter.cy Kith s:and:4rd plan!s u:dar continuous high density development be allowed in the valley in order to support a valley nc;,tr°l.- scwcr system. k 50 h'v:~se dAvslopnnot (o: even 25, 1f homas arc exper,alve) 1s largo ur.cugh to cupport acunoalcally u plckya tr:aqeznt p1ent. Cz^ylcttlcs and tyaiiy nuyt Fa selectzC carefully, ruqiilre reguLat 1r.atnction and calaitr,23r1ce, Guist Ca scruaned an3 fenced. Tne nlan.a arc vulnanCla to uhock la'±Sn;e (charp inc:casu in flaw voltuans) 19 Tt►is comment is not relevent to the E15. ~hich rLiy cnuse : lnr~a quir.tlty Atechar;e ot colida ln the o°fl.ant, !'achsnical falluras can fLavc the snne result, 7. I'os:.lulv ea°a:y {::ecout!ans aqalrst pL7nt npse.s ore: f1n11 sand itlt:atlon, dupltc-itlon o; r1ir1 r,quSpaant attd lnifier stst*,s a: 500 i:!et, a-tlvIga on]u: o;h_ro saptlc tanks ara a ta`a1 lac. This comment is Tiot relevent to the EIS. 9, i!nn't t!knstad n la:;e aunlcfwl extor,dlW:o uhen revezuz Lzs,~ has not de•+sloped. r', p:ocL,t, r;jstar nlnn S:i inclapert3atlo ln OIAbt So CO:140lSd«ta 8l1 F:1CiQ.p`0 alan:3 . lnto a s1r:ala 3y9Cdm ln the futuCe, tXc"~ raGw "5~,Acc sZaAc:: :~n::A~rMW:T SYSTZ!!5~~ The maintenance and operation agreement bcrivecn the developer and nz r,,r1oN,tL ASSCCIATIO;t OF lj.Gv-3 auiLn':.as ?a;aaRcri !fiSTliUid 12~ S {;ac~c Count is a matter of ublic record and mabe obtained by 1, 'I'o he ac.o?!nhlu to Fi!d nnd VA a cesmunlty cystaa auct ccauly wstE all state nrd pp y P y lxai l<,,4+ ana regulatlona and to npprwed by tha h:altn authorltles, °enananc contacting the County Engineets ofGce, R is not relevcnt to the EIS and is nut ' uiatntenance aed continuwa use and ocentlon nuet ulap ba assured. Of thn 12 cWto hnalth dapts. visited, ln tI1N 6tudY, all xe:s oi tha oplnion t}ut included herein. the oNai.lon arui nalncenancu o: coa.iurlty seuera3: cystona uro moro sattsCacio:y N Hhen undnr the control of ncnn awnrnanntal agency. Th1s k1nJ oF gwerrmanbal V o:-,inlatfon ta nindatory in 9 nf the IZ pt,nles v1si.ed, 0 3. Th' cost oF auptlc Um,< systems vnrles froa aWut $150 to $700 pe: house, ' r,, i1o< <,or;;ttc 9awa30 sc.,e►liz,cion pond, (i,3001:3) In cya U.S. Z.o des?Fned o, The approval of an expansion of the existing sewage trcatmcnt plant is t,ha L7:.fc ui 30 to 69 hawes per acre oF nonS suriaee nren, not a for conclusion and is the for the aration of this EIS. I:a•jelaca;-: :.hwld roaln a cDnsulGing canl4Lrv erkir.eerlnu Cln to cupply tha gone purPose (~rep tr,chnlcal advlca n^tassary fo; th;+ uroJact deaign, ilaJo: q:ohlaas thlt :rll: Any proposed sewage treaiment system must underga an indepenclent review CO:IFC01: t.lie en~;lneer tacludo rulating the poaalole g:o4th rate oi tha pcoj>ct o- tnz r-Are ,c vhicn cne haaaa alll to :+old to t,,e assign o: cn> -tewz:,ae faciiiti13 and approval of the 14aslungton State Department of Ecology. ^o thlt 1L wlll iunctlon oatisfactorlly nhd econmtcn2ly at aqch stnso of tha 5ub9ivl::ian duvslopm-anC. Tho FfEA hzs lt, o.rn fo:a of tnst Aeed chare the systun Sa to ba mnad by a p:ivato corFnr%tlon for p:ailt, It alao h1s snectnl provlstaan for tho c'rurle: a.° a n:ope:ty o,nY rn. n,,oc,ation. Activated sludgc systems are more effecbve in colifomi bacteria removal ocu912 "'rti`a+.0 rN f"ao,~:D S?OXSiIa cc~I~r .asTE ~r~~ u:sPC~a~, PC6ICY (TII3 aA3 123 because of the better control of organic solids. The specific removal effeciency q:•::~~:r_:o 'Ir r'LZ 11caRo ArID r:t~SSvr W .3, K:RE xao?ro) will vary from system to system depending upon the concentration in the 1'U8l.T~: 51-1'+3R.1 1E 3Y3*^:S Si:ri:: R4SJ3 Ss4z3AC' SY3TM3 l,Pratlti!nary pl;Ln3 miist La dav tr.v a l. Prallmina:Y pl3n3 E_IL rz doat n^dar 5up--r- incoming waste water and the nature of the sewage. ltc:r,aed en;lr.vsr, vlzlon o` an en-jineer, R,~qu:m a rnthllc ra4n enttty, 2, tin 1:!divl;ual ar corporatton c.iy a4o, • 'I, ;.n n+iltlnlr. hoa'cuFr, allow:d. 3. Sena nalttplu hodci;,s nllc::d, h, ilo wet ucll for puript:~; statlons, !s. I;r/ use :rt uell: - for pnnt:+; sta:toas, ~ 5. :,0.~~«~,,, rl~,,, ro L, ~~,t, ,,~,,:,~g A clilorinated discharge to a sub~urface drain6cld, ~vithout a dechlorina- tll nc.:l;n, plan3 a to sta:v ,oT au?:Jr,l. 124 don unit oneration, wiA kill the bacteria in lI1C dC11tl GeIJ anci result in tevtn n,^.i rr,;,orls 5. Uo n:n:ton of tes;ir; u: rCCO^!-karoln3, ro- ,,:,--r ultimate drain field failurc. Then are mcthods of disinfecting without the use o- :•t:;tit-~:-a.v ~~,u cir.aar~t or r11tic-«-w,l for of thc chlorine. Ozone for instance 'has been used effectively in some r call:c.o::i -iri htoniZ. colle^l.:^ 1n~1 late-~ls, aro cnwzdr,;r.'! ln c-4:1 ;a 1,:cnant1n2 hlta ~R3 r_~t~.eunc9 installaUons, i^n'•1~~.y fo:~thosN r:srcaai`l5 for rn^z:^s. , As discussed on pages 99 thru 101, nitrogen in the form of ammonia w1H ~ 25 be rapidly oxidized to nitrate by aerobic soil bacteria. The health district comments to the DL'IS are mcluded herein. They can be contacted for their speclfic position on tliis point. . ~ • A • • ~ A • • ~ • , , No camment can be made on the quote without reading the full context ~ 26 from ~vhich it was taken. Since ihe quotation is not referenced, such an investigation is not possible. ~ 73 -4Je~.~~ •W?sAL !.i^T rr r.•tiC;t:n; •r;.~sn ;,:"u tAccoN3 aY^i V25rcA n,io/05 e2; :!:,«eyk; The writer has misread the Gnal paragraph on page 102. The comments La;~o. F.10 s.MoAos ccu,7rY 112.1LTlI UISf. tlterein apply equally to package treatment plant drain Celds as weU as septic tank drtin fields. :,ll,y C;: ^Y1~ lia~.i:a1 - Ir~:~yua:! cnyi;i aad pxr n~en:lan. . -'i00 mIr r90: Ory:St.011, •,1mk., rtt, -',o, ti.it?i, ;,,:::in3 lo: cr3r d::iin'.!ald, atio: o~upUmping requirements from the proposed system will v ~ath loading Cna j'J:n iuo riill. 12a -and arc not ~no~vn at this time. ;tu!~ p:oDlSi+duy to Fiua.ui?io,i, pou: orrTa.!on. •,1'.: :r E_.:: Utll'_tics -i c-t t la :.,cto:y :v ia; c~ +i;n av! oynt!on, The use of the City of Spokane Treatment Plant for sludgc disposal is io: ?jU h~as 1n1 naw havy o•ia: 3C0 ou~r.ac;~d. ~~Q suggested as a mitigating measure. Please rcfer to Appendix D. The ,~tl~'i~:r~ L2;:~~ - i,~vtlfgie: d:apped o~l:01 on nd;ll;,ionxl lartd IIB?~IC4 :0: L':i„_1 lo;,. Department of Ecology has determined that there are appropriate locations on cili-,;3 L,,,a, - cc-„ ;r,ulala „,t;, fiu,tu,,:,,n of f;Lud„t Po;"11,1.13,, the project site for drainGclds and has approved the drainfield for the existing .:,L ~tr3 CcA, troubl0 „ktt;, ard=:Icn, trcatment plant. Any approval of expansion of thc existing system will require :iu..: LA.;aon - I•-tatiaqu,:s +.ialn:enanco, an independent llOL' review including the adequacy of the drain field location. Car:;.) CIGS Pa;,< - C(nannity a;nClc L1IIA Ht:h 541389 6117:AC1ti{, N Ct-tirtan:al C..y LL;:)oa - r^td @ ~ Please refer to Appcnclix E. ~ tlr.'i.i ;;u~i^Sa!on - Glor :=rn g1-i1t. ?l ^:janil L;J .!4a1th Mu'.. Cicr FCO [1'vno ti:la i:n-% :rn:{ aunnoscA 2o I» detclxsad to Isar.dAe ;vll a1Ld'4a in Caun:y, j; ,,~~,~p~ ;.~,r f~,,,, ,aU;,~~ir,,, a; „M The Departmcnt of Ecology has determined that there are adequate areas L'o n::;:aa:~en: o: cc;ec^!ng and pL~it uiy for a drainGeld on the projeet site. 1'?lna ;nni t;uot:3it 4 daats. ¢nd lt lus;ed un?y n•,'xx iosths, 'c''' n°"'.r' =r~j °a ;°ll°49 I. 'r50 r,a11 z~:v c: o~~a:~,la-) 132 This information is not prescntly available, 2, unquali!ltad opo:~tan 3. Cm.ar doear.'C nsn•. .o Ea7 c,s: cf n:acor c;zin,,:oa 1`. ""-3' r:°b1~ms ~ 133 The comment page on page 122 refers to the new and expanded system 5. ~:o on-sx:a l~,a~ct:~nn u: :,ou a,>>;.,,1, not the cxisting system. 134 A comp;~ison of the costs of various sewabe treatment systems is included in the DE1S on page 33. 135 Please refer to comment 98 and Appendix E. The statement on page 162 tncLcates that septic tank effluent are not ~36 suitable for discharge in surface waters. Acbvated sludge systems however generally provide an efAuent that is suitable for discharge into surface waters. 131 The statements regarding effluent quality refcr to on site aerobic units and not sep6c tanks. Data on acorbic units is not included in the Table on , J, page 31, The writer has apparendy misread tiie paragaph. • ;".SdS 1V SS'C.•:.,. :UJ'TY AICH i±'r::A11 ?0 Sc':nS3 Ce5P6:.AL suu,ittea sept. a, 1977 . The developer will comply with aU regulatory reyuircmcnts of DOE as to ' Spo4-ninr. Canty Caaaicaioncrs well as those of any other agency with jutisdiction, Ly Jntn li0aic,in ~ f} dr.co:din-~ to 3011 Concervatlon Se;•rlcc nna, na.t of Spo4ine Cuunty hia serlas 1 39 Noted. Uni;ing ::iclor~ Cac dnfRflr.ld dls.osal, ;;uct~ of tha 7alluy floor has ltm c~;ma.,itu proalciv in th1t it is too pe:ieaulo ar:d preserls lt~tle a: na p:oteetiort ' ~'u; ntir prlccless, sole-sourca aaul:er, 2) °Ti,e vereicdi aisaance frcm cOntan4r•.ating polnt lo the uatet taUle h;s no This comment is not relevent to the EIS. For specific information on grcat signi[icancc in IIIE C359 0," chenical contaninants, especlally when larje qu•tntitica af fhishtng kater uro lnvoh•erl." (Esvell-Saxton 3eport, Dec. '64) 140 regulatory requirements the writer should contact the agency with jurisdic- 7> *wo aau~entea InsLancou or aeli coitaa:nation were rroa saic: noc racceti,, tion. With regard to appeal procedures and patential litigation, the writer p:ie ucll (the ^rwat Sorthern fn iii?lya:d) sunposrdly had 130 feet of protectlan should contact lter attorncy or the prosecuting attorney'S OffiCO. rro-i ltc cairce oC con4s:ninaLtua, Cn;e polluted, even pzoole twa mlles na:th in .;orcan Acrus caaalalned of the taste of thetx untet', }:aiser Treutuoa,l'z aell uas ilco contai,iin3tud by chlocldes, Ylie :,alEs trave:ed vertically to the aater tacle amt tlten aGout 1,000 fr.e! Lo the uell, Staco Lh:~ tinlser uoll ts ln an aral o: 1;rtntcr nq,ttfr,r Plo-4 it ln ar.ce agt!n usa'olc Lut, the ;(illyard wel]„ mitc!do the 141 This EIS lias been prepared not to justify prior actions but to provide N cirta mmajor °lau ls stlll niiuE dmn, :^ne xzlls uan contanln:1ted 23 years ego, informaGon nn which to base futuredecisions. V 4) So-r.nllcl F;r.condnxy Pac;ca;;e Plantc cu r.oi renove chanicalc. The; are oaly N e,lc--I'ir.i septlc lanY,: diachar„Jng to a ein~Oc drainfield an:l, slncu the Uent, of r:rcA o;y refuso:: to Ss~uc 4lastc piscns*r,c ?arn~its, no lasiln; ie tc4r, dar.a os 9it'+'itiLy arcl quylily a` e"fluunl fro: tnvsa p?.antz. :lo th:rr,fnre Fave no b-,sls rcr cn•iprirl:.on to support ^.uch ular.tz aa en irapravepe,eit aver lndiviciu-l reo.lc i2r.+;s, 1 hiec Ir_en umi6lo tn Pfml zr.y t:~n;lblu data oa vo:u;qa of dischir;;c !a rtlaLSon to dupth of ponotrrtlon in cztre^:ly perneaDle soll, i h:rra hcare lhat so.it, ta;ts of local aeUs havc turn-;l up•t4~ hlgh nltrato counto thua suoooclln3 m, conLentton that conLanlnutloa o' an uM_ergraind uateY supply is ea insldlo..Js Lh1r,•;. I',ast oC the testln;; ls Cor cal1.^oT hactoria Lut 16 appaars the grcatest dam;er lics in the cunulativr cficc: o: Ccarfc3l;: uhlcii do nol diastpitc lf'r.c L'nL ~sClcri,., 5} Phc;c are no ";;tandards" for F;rou.^,dwater, 'r;1lh nll lha ruitior.al etrhasls oa o^otL-ctlon n,^ um•;acc saters Lh^ra ls z c?ear Poasa;e to those tiho don'L uaot ;p b. hrv::;led l+y -]C' an:l c".f'n to di:cha:&e Co =;aSnflelda. T'r.ey xill not h:va to gu. jenltc or do r.ny tcsLlnj ar.ii, as n rese!:, na one w111 have thc iia;d drLa n^_eded ta A^tr,rnina the ezlcnt o;' vir disne;.al o:0*31eM:, Praof o; lhie atllt;:de la ch: 17a: lhe Clly raceiv.c :'a: I,he r.ca; at Lon--, In'r.e whlle lho Caur.ty rcaatrs on ihu •,1r'u11nes unzc•^.lh_d, 'Phe Courity evdn pd:a Co the Cily's uroblces by u„1n~, ti:e !,'icy trclitncnt nl+inl ~c i drup ;or roaa o.' L!ir, nilllo;is of g~llone a: cluc:~r. pua~r.9 ar.^,u,lly rre:, Ca.cit, :.eptlc i,n;:s ar.a cess pools 7!m re::t Sc dumoed st ciratc;lc lc^•,tlon; all ar,qiir4 L'nc ;a.inty vhare lt o~zec to Lhe sur'ace desyi?r, an; cf."o:tc tc covur 16. T1•a Cci,nty zho^?d ba mr.ed n rarty to any ]e,al aetion faa:ilcLcd !,y rc: iul-Ltorr 4;e11clLa ',or refusir; ta a;,r.iroe tts r,es}wnsiaLltUcs to r;c•ilda rrlvqu~~~: di:;1,0:,t1 uol,sldc the Ctty l;nlls, the 4allcy lucxuor.ilec, 1[ ulll I.Lr: jth lnc>~st Clly lu t!:e ..,C af,d 7CL, lt'^ LotLCn a dtce xlCr :I1 th^s }•~:.,r^ un Lyc uick n` .nu Cicy. 1.` 4h: City snoull o-! for subsu;fa.u kuuld uuc prabI:nr: Ln, n~Cr' r• / ~ , ~ • ~ • • / • Y r ~ • ~ r r • i • • i l ',•n•_ pl•r:; Cor t!:u 5o:th 5tnr PaCRt;.: Fl10C tn I;c1d c:nt th:au^,h Cour a,enclca n-,i ih^ ul.r;l didn't l~st even n ye•ir. Cvar 200 c-illc +c;e zeMSved En ona (1ay ~i,•n: Uhn :.6encn froi a sp-iroly poci?e;eJ arei, i don't noad lo :ell yqi u:iit :I11 hrr.r•i 3r lhr, u:opo;.¢l 173,133) ;r,i ul:mL gws b,:lly up in thl;, den:;ely j;y,?ated arr,). ba; rr.cv!vt,_1 33 toryp':tntr- os oioce frwa p?antn nr.d la- , -.Inr.o ")h n1^, vc :.]I kno•. lhtl'• +lst thi tlp af t;,a 1cPbCrt,1. Y.nny wc,-,,ld . rM lh- 'i~., llh !lictrict or athar asrn:ic.; not evcs tothc^, :11•; !p:I.C. 0° c:co:n,y rufusas to aa:,c.ia Its naiuated responslbilitlaa under ~ ..00.4B. I++rotc John drnm.iist revn,:al nontns ago ragardtn,~,, the ill:gal con- a,ructiun at tiid[laac ard, io 1atu, navc recetved na realy, ^C:; 9C,1e8,310 st~ites, "t11 pl,,ns :,nl sr4cl"Ic:tCiona ?or tli: ca:alruc:fon oi ne;: veaera,,{r. syctens, •,~:a-~oa treatn,n6 or dlcpo>al pl-ints or c7cteas, and Lha yraposed riothal oC fuI u-c oparaC{oa anl qllnlenenc2 0.' satd fu:ility or facllittcs, slull ta cuh- ;.il' aJ to an:1 L•; appcaved by the connlssion, .^`oro corstnicttnn thcri.,o! rt~r r,.,i,t." (?nonist;, sapplled) In adfllcSon, pCw 90.48.162 ^.tetes, "6ny cmmty oe 7n, nunictaal oe GUbISC CG'pD:dt10:1 Or nllr,,q o: proposing io o{r•zate a seuerage :.yslen, 1nClu;lin; n-y ^,yaten uhici collacl3 o:tly danastle cenerge, enlch renulte in thr: disoaal o:' unstc nnt;sin2 Srito the xatcrs of the scatc cirill pcocure n :~jriii fro,a i!o. dclirlaunl of ecolo?y l:afore so dieposiry of sucL w3tcriai;," (E-Ip1aef^ suppilled) N} 7tiirc is n ianjoc dSso,;raenenl betweee the tuo state arencics UC' and D3;!S n:. tr, wh;, fa cespon:ILle Pu: uporuvir_, Aao: [o: pi:kagc ulantq llke I;ldtlow, 5n*i .fnalv; ot' UiWS niinb2in^ tilt U?C 2't3,96 cue neva- r,a1nt to npoly to (V ruchliiical ylnnt, o.' tht^ wk~nltwle and hc can obviaualy not Ao a job WrSth only v t!t:c~ p.o?lo on hls ::laff lo cavar all o° ::=irtetn W3ahin;toa nnd his tocpormihil- S'i.,. roc• (I^lnkln, i+;0,cr sunplloa. A closu n-tlin, o: ihr,p:^inllioas ..oct[on o!' !:.FC 749.9i.Q%0 110;11<I ::can 6o cupanzL 'a:'c SntorproWtioi thus j;ivSn,~ 11(1, ~ufclry for ,tpprovin,; p1um, Piiia nust 4c reoalveJ, 9) "'iirra i*; ;-noih2. Fur.dz;a:n.a1 dSc:i;tcc-nnt bAuaun the Caunty wn^,tna^rc and the i!-,~lth Ul::.ricc n:n:i:din:, cLvain"Icl;l i:calth OtatriCt re;;ulationa nllo:i ttio 300 1C.dim; t'ttt the Counly eill aecuot Cor n;o, Tt is o5v1P~s LIctt tt:cpox.iLllity ta so fracturad !'or ,p;):oval o: ctck3;o pl,nia Lh:tt il wlll '•;uir~: a mjn: c`fori on the }•+ct o.° crury'nna cor.Cerw:l to ct:aightun tlnn3r, uu'., S(,) I~u o^a r.an provl9e r:: wlth dils on the act,ial dr?ficit tho County fs p:eaentty ruarir..:; on 6hc r,fght plints and lzgoo~, lt on:nitw air! yet, they are p11nn1nS to i:: rie I!ireo nn;^ this ycar, ?.lso, no,t n:oalc arc uruuare a° Lhe Pnct tP.:Lt tiio C(.,u•Cy P.irk i)_:pt, h'io m'd.^. P. co-ait,:m-al to ^sin'cln th: graindn nrourtd ten aeN<<ge ?'ii.y nra uccaonlly inLi:rtlniry; :iraa Sn ro.arn for j28,000 1n Mquir-,cnL C.t,.,n tnr,•,i l,y Lhc Ce;inty 'eh•i; hc linvo Is a i:fc,:oy ;ouso eexadc _yctow cc dn; in lit;tr,,f;ii tt!C 'mck doar u{ta a21 M;it•i a` hidden aut.SdtCC, ite evun hu-e •~l I lrri~-Alon ulatricto suc9 '/cra op=ratln; c1c{:a;,a plants nnd logoons al a ]u;:, to Lhair r,u;laq,:ra, hit .`ca :C'.oa;l L:er! mealin_a tu ltorn Lhoy ara plcklng uq, ihir. 70;: xlth tti.•ir cluctriezl ritaa. Yoa 11c0 pit Jcra 1n Uhe po:,i.lnn o° it't+in•; to apnro/v ,lanL; tiriLlio;1: the cr.r:rLl;,c Cp Ao ro. Tt thc Crnanly Cn;1nLOC3 n't goln~: tu oF.ru!o a f]cllltp t9cy dca't app:ov, th_ p11n;: ihls op;,r.s up ltc pv..-.1 ;Illty t.1rat V;•rn a.lr,lfl a::c^,: n pl,ic,t ;.:t,h Cha iiuilln UfArict's hl(;hcr loirllr.-; cle.^1gn eu) L6CrofOre cm:znnl U:^.ir rad InY, uir,r, the dninCtald hns to Fn r,•pLtc.A, Tii;• yucslion renAns as to a:iy in^y cor.:inuo tu accepl planls raltii-r Lhin r;ivir._; lhea Ca Lhe Ceun6y :,n,inun ~ fo: op2ntion? ~'c • 7 11) i"ha grair+:: zround soarv ulants aro nctunlly called mint-P'.rEv nr,d children :u,c encour~;;ed to play i,i thr, u7ly o;k,n ance in a soldlvision, lhurd 13 a p-.tcntf.il "altc:ictlve nuisineo" pmt0r,7 in the evenl tnat a ciitld uauld Le 1n_ ,iur,-I n, ilrn.inte-:l 1n ona o` tha:.e iucililics, 3rnovyblc Crates or ecrcenin„ are ' noi :aq~~irr.l 111-1 linblliLy Sc aot clear elncc thc Counly cannot actually o:+n thc p1%nts &f:ico It M:: no Co.mproh27s[vo ^cwer 1'lan. 7La I:Ldtloae, ~~llr.t u117 h., Cenced iri~ r~nce, h:tvt; nevez atopxd cu:ioua chilJren attracled by churnln; entcr ;inl thi 14-..1 o.' pa-qx. ,;nd uo r.xc discimst,; n o!nnL lacrer th7n mny cuicmin~ Nuols ulth 10 1n 3": fctA ol' nmck. So fa[ weba b:•un luc;:/ aad fuvc only h.id roc'r.s thro.n into t-r• s^-4e,r, n;cd µimr-s unplu.-5ud, we'd llko Eo knod If such installetiona ace r,ven 1n,n:ablu' 12) Therii 1:; no clearcut rosponsltllt.y nc centralleed dot-L on sueh npecations r,n9, a1ncr; tcrnlta an9 testin; are nll, 1t ls inoossl6le to n3ku any ktr.d oC ratioml docisiuns :agat'dlny thei: efficacy. To take tho posltion thit havtR{ a collecGlon sysWn in lhe !:rounci auparcedes ell other concerns 1; lrresponslblo, Thcre are othc: nore inoorbint consldoration; than the dublous clance thlt you m1,~ht at sane f~t!ire date be ablu to plck up aate of these eystems, i'he 1on;-rango cmts of nunerous 11!'t ctatlon, a~rJ excesstve energy us: could oatuziQh tho nuaulxis Leu::fits. Not the least af our conCerns rhould la---Are wa creating a grenl.er potcatfal !'or contani;ulian by consolitiating tha uastes Fran wer 400 hanes 1n or.v a.~a11 aroa? The nttarhed data iroy a book 1n thu CaunLy libtnry called, "Ur;~en Plannln; 1,cpacts o; :Intcr f'ollutton Control" !rj S1gvrd Crava h:lps oat tlr. }acfcl;c planC dilcraa inlo uerpact±va, N V I}) TimrU is ;i major oce;tdo:rn in the plannln3 procesc rl;ht horo nt tho local ~ 1o':ul chln a n-ljnr aoiiticatlq-1 to colditlons and tn c ffntl nlnt aan Iw 1nitlnl:d :r0 conztnictr.i ailli na oanprlLnily for adJicCnt proF rty o.iner^ lo b: lriurped •,bt-ol :n Sn•.tallaLSon L1vit cnjtd have 2n cxtr:nely ns„Atlva dev, luatlon o-ffect. (.uxIltiom. aro vani:, qcauonsi:~llily is not cle^e•. Acd wo'vo Lue,n ndvlsca dy !uvrr:l µ:opli~ LrraL co.nztructloa prlor to approval Is co;,monplscc. At least o:::- thlyd of all projcets ;o in tLic way nnd xc urc Lold that no onu h.s tha autho:ity to rlo anythin; nGoul il. Wu are tio ]or-~cr nsive eneugh to assume regulztory a,:i.c{e•~ aie (ialn^ l.iieir joa 1n Cact, ue've b.car.n cynir,al to Llie ezErene, 111) 'doen S rr,quinsted a 1isL o!' all ry,c'tage planCs nrd li;~oor.s in Scw;clno County Froi tho iicnllh Giclricf, ^^vc:a1 aee>r; t,;,-o, i Nos Lold 1?1^y didn't hmr, onc•. th.y r•.l :pprova P11 t:ia drainfial9s sha.,ldu'L tL:y also iLave eove recottlc? 'de PavE ;11e;0 ruund tly:t not o;ly doas iia raiuse to out deae,tic cyatens ai pecait th:!, f:lso rofirc lo requlcu lccLfng o: eemercial 1n,tzll3tion, such ae.--- Valley Ccn~~rs1 iio„pilal, 'ta;l Lfon, Gnivcrsity Ci.y, etc, Dou,n't anyoaa caca i:hat a ho•:pite:.l 1n Qfaclur;lm•, lo our nqcf;ur? 15) i;:t 5E1.17.16-0 (?la6lin;; C1:r} requfre3 thit c;:ch ani every pL1t o: mplst af any prup;r„y CileP. ."ar record _Lnll--- "(1) Ccnlain n eiatr,csnt of approval trqa itm ctLy, toen ur cwiliLy liceuao;l ~cmr. en„ine:r,,,+; Lo th.^. survey Aatz, ]aywl o' ntrrots, allcys ani olhcr rii:ila o.` 'ariy, doaS,r,n o.° brid!;as, sc.+ar,e 2nd HitCC systens acd ot-ter cLructure,," (Enp!~~~ia ^up,lir.d) Pne dedieation on the ilrul plat contalns no r.:fcrence to app*ova} LpHEi?a d1spzsn1. ' A • w ~ • • ~ • • • • JCPL. S. 1977 il'ioiy lidirs iuich thou;fit have g0ae into the qe^stlons sobaitted tc.la,v a:.r7 I hnl- yo.i apqpciiclale lho eCfart or.Fer.9ed Sn trylnl Lo get answvcc pr3ar W the iuirSr;,;, '.Ith ::o n3ny a!;uncfus t,tvlr„ a plecu of the aciloa it'c a2no.:t !up;:^,intc to •icr;:tirc withwL dovClir; fcll Ll;,:. TlLo folloxln; qu±stlcn.; vurc ~:rltton rnnimly and n"t pt:rlnin dir_ctly to Lh°. ?:idllane SuLilrlclon ard r.ore sgeci"icnll! , to thl: pc~slblc approved Instnllatlon o' a 170,000 EA1 Fzckazc lrcatrent clur.l., i. 7hat le. 6he r,oil clasclflcatlon ln the drnlnField nrea? Any parc tes:t? 6ro aoilc r.xcesstvcly rormer.bla? 2, :loihara ln the uLn Clor,nissian fSle ls the severc draina;o prohle~n !n the SW cosr,er nentlon;:;;. Ynit 1s ihe caase? Nar and uhera aill s-ater te diverted? 71h1: dntn doas the Counly h.=.ve to cuppart the iruW2lntion o` ouch a olno; as -tn u{v,rndlr.;? Is anything avatlahlc on depth o: inSllttatian ln tolatlon to cceh voluAes? h, Ah-it ~.:;:crn!x~~u of the 170,000 grCt w111 ce unrenoved chcalcals eech a.: r.ltr.tae? 5. i7}mcra uas ti;o se;;a;;4 collectlon syslem installed in rulition to the drinRinr, irair.r lincs' G, llid anyonc dct.r,nlne the adeq-kuy fo: edsUny custanera before aoprovln; an additior.il 72 hoaes on awaLer cupply system 4lready ovartnxed? Kenalt 3ada1:, Sec. for 4:n;ie1 Ir^{;,atton, st:tcd al sn annex2tlon hearln,- on e;prll 14, 1571, tlnt the d;aLrict Ss dovclopin; by 3G1+;C5 AI%I v0ti1d 00t 7Qd RIIJ 502'YlCC fl7'CZ xhich LLiGht ,jcn{;,dtze tlie pricury duly oF aarvin; lhGSO nlrcady in the distrlct. Rir ptes5ure N is alr,::Ldy ntl an lwal, daya co hic '?I st.tenant ouct ln Snop.:raLtvc, d'tso, 1!v1e1 ' v Ss r: C]cs; 1 dt:;LricE ullh no Cmprenan°!tie Plan a:. requltud :31nee 1973, LTI 7. khil fn the proceriuro (if any) Por 1nlLintSn; rehenrln;s uhen nodtrlcatio.-is tc r.nndltlun:, a, : contc.aplatcd? injru app---^r ta te no uniCorn plan de aoao j;o to and so-ne dan't. E. Sinca haUi tlv: Coiroty 3n;,inCrta ar.J the Ec~Llih DisLriCL vcra auare o: the 10.au, sinl slen> ehuoold lhey have lnl.en? Anythin3 in urlLing7 9. 1.1iiy do•:sn'L tho dedlcltton ca the :fnil p1aL evan mentlon "xa,;o dispa3al? 10. Paa cen tho driln°icld desi3n p:oblen tetueen the Co. Fn, nnd the ilealth llicE, 1,,, re3olvodY 11, Ihvn Ve;a Irrirallon an;l othcrs t:e- radu auar-j of lhc fact Lh7l Cl;c Cuunty Sc u;litn-~ to a:.sun: thz! W0 or, ptnnts nnd 1s;nonn? t?., !Ihzt 1s the praaent itoAlxe3 doll-ar asouni th:tt ve taxpiJers u:c alrcady ruE:idizSn;, rlants a ni ]n;oons az doa't even usa? L'c kno4 the $5.50%onth u.Llity fui- to lh: lndlvSJval doxu't b.gin to :otich tli9 actu-il eozt. .,.'.nt wa uocl Sc a lho:oa°h cnnl/h:t,efit cnalyaia tiat ti:ould Sncludo possible iltr,ger tu the nq;il.°er, n-ijoc 11abi2ity nnd depr^ciniian urlte-a ta eaong otner thlr;,s, 1). Sirrn the dr-tin'lcld Sn Alo:;t h:i, alrcady buon rcolaca:1 tirlcu, N(12CC do vc ~o fra.a L~:ro? ,Lo ll;a nca lench lr.A: nt rilllv_ex aolving tho dralm5c problen? ;Jma cin Lhe r.eu ?'SiateA i',111a plant evec aork chnn it's ln a nntuxal dralna:e•rny acd t.hr: pi p-: to iiivurt xater Clo.is,; da:n lh° htll 1c ulreaJy tuo-liil:dc Eu;l o` deb;ls? M. If you lnaict on lr.ctlllatlon of LhLn pl:int (f.Ndlloza) w171 yp.i ;equir~. co:ipliancu uitb "C.G 90.4" by thv U::: prlar to Curthor coo:lruc:foa? lj. Ilill °uLnm conditiair; iRentl;y n reapo:afble ogency by rine cather t;tit vo;ua . rufc•rcnces lo "epprnprlaL~:" agcncir? 16, Wiii1. slrcit'Sc u6uu.. aill W Uikon to :c,op tha caxaon p:ac6lco o" con:.,trueLicr, Vel" to aPFroval? Dx3 L'n: Cou-ILy pteaently have thc lu;nl outhorlty to Sceuu Inj,mctloo; Sn such cs:~ca? ' , / QuEsrto~s f'g. 2 ty, Since s-'re tilk:n; Lhe largast plant the County En,inoerc hive ooarnte<i, it •,+ould seea -in EIS Ss in order. F.any ln thia nel3hborhood are cttll on Frlvat: wclls aiol Nould iml bl lhrtllc:;t inth reehzrna `ral the 110,000 --cri o: effluant, Ic Crir.stcr In the n-:tjor :lo:i arca of ttre zo-j1.'cr? :fn1l is actual)y knoan about dJrrcClon and r1W o: Cloa tterc arc! sta:t: kisla^ ]r.vuls? Sevaral yc-cs ago tlto w,itar tnblc in lhf. +Lrc-i Has d+lndling rapidly. ' 19, i{na much aludgo Fii11 this plant ptoauce annual]y arr.l Nhcra aill it be dumpeA? 1Q, S1nce ? an `.undaauntzlly oonosad to ciildren playing araund the treataent ~elants, eh'It can oa done to nako them nora saFo? I Hauld sug,cst that any aho con:ider such concarns of no consequecca r.1ke a td p to vlea tha slze and depth o.` tltls }!71f finisited pldni. 20. Since the Tt.rmtt fo: the drnin:leld Ss 111e31o1Q, can aomeono find out uhst tiis :inal c:ic-tclty ulll actually 'ce ard uhat thz jermlt cmL? 21, ;Ihy doesn'c the prooosed ti7.0 call `or up:ceco o.° the graands surrwndins tha plznt' Was't lt be a firetrap tf allaaed .o d:y out and dozsn'l tha plant rr,nu"actura uieLli3n2 na awZCte pro3uci° ii so, ha'+ sill the methane ix: disposed o' and uill il cauzc an oior oroblcm? 22. ] h1vu noc evun te:en abli: to ;et a tipiro oa total land sat as11o for the el>_nt, d:aiu°ield and (lhoya) b-iffc:r., 7),L: a:ry o° the "203" sLudy u:ing don^. in areas Nith h:gh volurae dicchLret, o° u°;luunt? Uoulun't thls ce the nost approprlata placa ;or acnzln; devlcas? 21. Nh1t xSll - the projecle-i enn:r;y c,e 'o: F'l(tilace? Any liCl st.a-lions? , Chlorii~°tion' Sr•ica tat actdz for ro:e ch:n ono replacaaont dn3nfleld? 6nount m tine raoolr_.1 eiac:1 fi:y 'oz uelntanaa:?, elC? D[eak even polnt tn contracL? N 8o,i]In; raqulrcd? v 25, 1'' a cnllec'ion systan is o.` pttna lnportnner„ uHp aren't dry 1Lneo `cislble ~ until we deciLlo tu an;in:4r n dC•cent cl!epasn) s7stea? P,,, ?in•illy, tr,in; to ?r,w in:ornatlon co ;:ldilasa Me t.:en tine roneoLlin; un-f Ci'ucl-•:<<.Im;. Oae thin; Is roat app:+ront---tM Co,inLy 1s not in co%pl'sanco 7r.i 1.1n+.1v[; 217:i li~~~t 'u.caa. ]uN yuars n3o. 276 h-as en "dcc.ac to Publlc 3eco.ds' .cn requfres unicrin;; or all pulzlkc dcc-alenw anl a desigr.aled puo tc aoCUrenta u•"t'ica: .:no Inz ~.r,~clal exrarlfsc op KL:t ls pu_1Sc an:i w_at ia noE. Cnly yaur r.,,r'r. h1s done the joL as !'ac a^ i c?n tel'1 an3 a LraiitinS sesslon:by ih: „Lty, ^aneral oc lh: iroa. d6Cy. is lon; w~cdu„ Yle.i;r ~~Qe•i,.e iin-it. s?=clfic :,iGTt. jou a:'e ot:1nZ to eexoply? Iwould hoptu lo r,tret :rllh your :itaiP to cllar.u:;s th^_ naswer5 to each of the aLova e^ 1h;•y ara nll lu;,itin'tto qa-:: tSo-in dexrrir,> o` a resoon.c. C'loasr tuil yaur urillc:n reci~o~.-,~r 60--- 3ain i:onican 3, 31O 2o:,013:k !ra. 5,ck•tnc, A;,. 9^205 ~ • • ~ ~ ~ ~ ~ ~ ~ ~ • r • ~ ~ • i • ~i • • ~ LATE COMMENT STnTE OF IUASHINGTON STATE ENERGY OFFICE ~ WASNING70N wor u- W s..,M.a.w.1'.0- QtAa WrNll iiw Di~v Ln• fleu luamro (1 &dN, Octtim Gwwmr SeptemAer 6, 1918 Mr. Fred Dayharsh • Spoksne County Planniag Dept, H. 811 Jefferson Spokane, WA 99201 SUBJECT: Draft EIS for Midilnme Subdivlsion pevelopment Ocar Mr. Oayharsh: lhank you far the opportunity to caamient on the document ieferenced above. Our revicw has been to detcimine if home builden are befng encouraged to wmply with the lhcnnal insulation slandards specificd in 118 98 (ram the last lc9islativc scssion. Tiie fSrst flve mitigative measures listed below are ddAir.ssed in NB 98. Thc othcr suggestfons 9re also recamunded lo increase ener9y effieiency. page 123, 1. AAeqimte insulation in ceilings, roofs, exterior nalls and floor setlions over unheated spaces. N 123 2. Use of specfal 9lazing, ' V ~ 3. Pinpcr use of vapur barricrs. ' 4. Use of iaeaUierslriyping, caulking or yaskeis arounA windaws, doors and other ap;ninys. 5. Adequate insulattan oround ducts, piping and sl.ylights. 1237 6. Provisinns far ucll-ventilated attits, 12Y 1, Proper building m•ientation and wise use of laiidscaping to get the ,raxfmum etficiency frosi the snuth aud west sides of buildings. 123 B. Use o( sloim doois and irindows anJ use of ufndawn that can be opeucd and clo;ed. 123 9, Use of hi9h perfoimance turnaces lhnt can recover waste haa[ frnm flue 9as or thosc with a flue Shutoff. 12310. Ike of t-ner9Y efFicieut liyhts, tiater heaters, air conditioners , and other appliances, II. Pirovisiuns for 6ike paths and walling paths, - 271 2. Provisions ta iualanent caryoolfnq or vanpooling or to - encow•agc use of mass transit. Ve have noted wliich ineasures wcrc addressed in the Araft EIS, and • reyuest con5ideralion be given to [he oUter points as well, • ' Sincercly, REC~ivtb Itds AnderSOn ~ to CM 8 iyi41 Cnergy Proyram Coarclinator .'IA>jm SPORANE COUNiY , VIANNINf DEPAR111[Ni ~ ► .__..r"""... r 13SAFT a ~ vlr~~m~ ~ nt tate ~ f ~ irnpact ~ ~ , ~ • ~ ! ~ I . ~ • V ~u C31V,~IC)N unty o~ ~~~IC13" , s LOaCI Agency cc Au9ust 1978 ~ ~ ~ DRA FT ENVIRONMENTAL IMPACT STATEMENT • MIDILOME SUBDIVISION . • w Prepa red for Midilome, Inc. • Lead Agency: County of Spokane • • ~ August 1978 ~ HAWORTH AND ANDERSON, INC. West 621 Mallon Avenue Spokane, 6Jashington 99201 • • ~ ~ INTRODUCTION The proposed action under review is a request for a zone change from Agricultural to Single Family Residential for approximately 160 acres of land and subsequent development of that property as a suburban residential development. A preliminary plaL of the property has also been submitted ~ for approval. The proposed action also includes the issuance of all neces- sary local, state and Federal regulatory permits and approvals. The proposed action was initiated by Midilome, Inc., aWashington corpora- tion, who are the owners and developers of the property. This project was first initiated in March of 1976 when a preliminary plat was submitted and ~ zone change requested for the first phase of the project called Midilome Addi- tion, which consisted of about 25 acres and 72 residential units. The Board of County Commissioners of Spokane County gave final approval to the plat of Midilome Addition on April 7, 1977. The approval of the plat specified that individual on-site septic tanks would be*used for waste water disposal. Sub- sequent to this approval the project development proposed the use of a central . activated sludge extended aeration sewage treatment system in lieu of indivi- dual on-site septic tanks. The proposed package sewage treatment facility and distribution system was approved by the Spokane County Engineer on May 18, 1977, and by the Spokane County Health District on July 5, 1977. Subsequent to these approvals the developer commenced construction of the sewage treatment system. Acting upon a citizen petition, the Spokane County Board of County Commissioners held a hearing upon the revised sewage treatment proposal on ~ September 8, 1977, and on September 15, 1977 issued a written approval of the change in plat conditions. On September 29, 1977 the developer entered into a written maintenance and operation agreement with Spokane County for the sewage treatment system. The above actions and the subsequent approval of the sewage treatment system by the 64ashington State Departments of Ecology and Social and Health Services are presently the subject of litigation. At the • present time building permits have been issued for all 72 lots approved in Midilome Addition. Of the residential units completed or now under construc- tion 51 units are connected to the package sewage treatment plant and 21 units utilize on-site septic tanks. The following environmental analysis is intended to assess the impact of • the entire Midilome Subdivision project including the 72 units that have pre- viously been approved. The lead agency for this proposal is the County of Spokane. The respon- sible official is the Board of County Commissioners, who have assigned respon- sibility for the environmental review process to Mr. Fred Dayharsh, Director, ~ Spokane County Planning Department. The p roposed action may require the following legal actions and permits: l. Draft and Final Environmental Impact Statements; 2. Zone Change from Agricultural to Single Family Residential; ~ 3. Approval of Preliminary and Final Plats for the project; 4. Approvals or permits from the Spokane County Health District, 4Jashington State Department of Social and Health Services, and the Washington State Department of Ecology for design and operation of a sewage disposal system; ~ i ~ 5. Sole Source Aquifer review and approval by the federal Environ- mental Protection Agency; ~ 6. Project review and approval by the federal Department of Housing and Urban Development; and 7. The obtaining of all required building permits. The draft environmental impact statement was prepared by Haworth and Anderson, Inc., West 621 Mallon, Spokane, WA 99201. Data required to pro- ~ duce this document may be obtained at the above address. Copies of this document may be obtained from the Spokane County Planning Department for the cost of reproduction and mailing. This Draft Environmental Impact Statement was issued on August 4, 1978. ~ In order to be incorporated into the Final Environmental Impact Statement, public comments and remarks by consulted agencies or individuals must be received by the Spokane County Planning Department, North 811 Jefferson, Spokane, WA 99201,.on or before September 8, 1978. • • • • 3 ~ ~ ~ ~ TABLE OF CONTENTS • INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i DISTRIBUTIOIV LIST . . . . . . . . . . . . . . . . . . . . . . . . . . vi ~ SUMMARY OF THE CONTENTS OF THE DRAFT EIS . . . . . . . . . . . . . . . 1 IMPACT SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Description of the Proposed Action . . . . . . . . . . . . . . . 9 Exi sti ng Condi ti ons . . . . . . . . . . . . . . . . . . . . . . . 13 ~ The Probable Impact of the Proposed Action . . . . . . . . . . . 18 The Relationship Between Local Short Term Uses of Man's Environment and Maintenance and Enhancement of Long . Term Producti vi ty . . . . . . . . . . . . . . . . . . . . . . . 23 Irreversible and/or Irretrievable Commitments of Resources 24 Measures to Mitigate Adverse Impacts . . . . . . . . . . . . . . 25 ~ Alternatives to the Proposed Project . . . . . . . . . . . . . . 29 Unavoidable Adverse Impacts . . . . . . . . . . . . . . . . . , 36 APPENDIX A: CATEGORICAL IMPACT ANAYSIS . . . . . . . . . . . . . . . 39 Li st of E1 ements of the Envi ronment , , , , , , , , , , , , , , , , , 39 + E1 ements of the Phys i cal Env i ronment . . . . . . . . . . . . . . . . . 41 l. Earth . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 2. Ai r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 3. Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 4. F 1 o ra . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:04 0 5. Fauna . . . . . . . . . . . . . . . . . . . . . . . . . . . .104 6. Noi se . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 7. Light and Glare. . . . . e . . . . . . . . . . . . . . . . .107 8. Land Use . . . . . . . . . . . . . . . . . . . . . . . . . . 1 08 9. Natural Resources . . . . . . . . . . . . . . . . . . . . . . 1'9 10. Risk of Explosion or Hazaraous Emissions ~ El ements of the Human Env i ronment , , , , , , , , , , , , , , , , , , 111 , l. Population . . . . . . . . . . . . . . . . . . . . . . . . .111 2. Nousing . . . . . . . . . . . . . . . . . . . . . . . . . . .112 3. Economics . . . . . . . . . . . . . . . . . . . . . . . . .112 4. Transportation/Circulation . . . . . . . . . . . . . . . . . 113 5. Publ ic Services . . . . . . . . . . . . . . . . . . . . . . . 117 ~ 6. Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 7. Util ities . . . . . . . . . . . . . . . . . . . . . . . . . . 124 8. Human Heal th . . . . . . . . , . , . . , . . . . . . . . . . 125 9. Aesthetics . . . . . . . . . . . . . . e . . . . . . . . . 125 10. Rec reati on . . . . . . . . . . . . . . . . . . . . . . . . 125 11. Archaeological/Historical . . . . . . . . . . . . . . . . . . 125 ~ ~ 12. Additional Population Characteristlcs. . . . . . . . . . . . 125 Ci tati ons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 ~ iii ~ APPENDIX B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128 Section l: Chemical Quality of Ground Water from Wells in the ~ Vi ci ni ty of the Project Si te . . . . . . . . . . . . . . . . 128 Section Z: Ground Water Quality Data from Various Aquifer Cross Secti ons . . . . . . . . . . . . . . . . . . . . . . . 142 Section 3: LJater Quality Data from Depth-Selective Ground Water Si tes . . . . . . . . . . . . . . . . . . . . . . . . . 149 ~ APPENDIX C: WASTE WATER TREATMENT OPTIONS . . . . . . . . . . . . . .156 Citations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 • • ♦ ~ r ~ ~ 0 iv ~ ~ LIST OF MAPS AND TABLES Vicinity Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ~ Site h1ap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Plat Design. . . . 6u;li*ty . . . . . . . . . . . . . . . . . . . . 12 Estimated Effluent from Alternati~ve Waste Water Treatment Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Operational Characteristi~c of Various Treatment Processes. 32 Estimated Total Annual and Uni-t Costs for Al.ternative Treatment ~ Processes wi th a DesTgn Fl ow of 1.0 MGD . . . . . . . . . . . . . . 33 So i 1 s h1a p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Topography Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Maximum hlonitored Levels of Pollutants : . . . . . . . . . . . . . . 48 Suspended Particulate Summary . . . . . . . . . . . . . . . . . . . . . 49 1976 Carbon Monoxide Levels. . . . . . . . . . . . . . . . . . . . 51 ~ Non-Attai nment Area Map . . . . . . . . . . . . . . . . . . . . . . . 52 CO Moni tori ng Stati on Si tes . . . . . . . . . . . . . . . . . . . . . 53 . CO Concentrati ons . . . . . . . . . . . . . . . . . . . . . . . . . 55 Aqui fzr Recharge Area . . . . . . . . . . . . . . . . . . . . . . . . 59 _ Thickness and Seismic Profile of the Spokane-Rathdrum Prairie 61 Aquifer Transmissivity Distribution . . . . . . . . . . . . . . . . . 63 ~ Water Level Fluctuations in Well 25/44-23D1 . . . . . . . . . . . . . 65 Aquifer Discharge/Recharge Rates . . . . . . . . . . . . . . . . . . . 67 Estimated Average Rates of Recharge to and Discharge from the Aquifer. 68 Monthly 4Jater Balance Data for Spokane Valley Under Generalized Suburban Condi ti ons . . . . . . . . . . . . . . . . . . . . . . . . 71 Summary of Public Water-Supply Systems Obtaining Water from the ~ Aqui fer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Water Qual i ty Standards . . . . . . . . . . . . . . . . . . . . . . . 76 Summary of Ground-Water-Quality Data . . . . . . . . . . . . . . . . . 78 Records of Locations Where Constituents in Ground-Water Samples Have Exceeded Chemical Standards . . . . . . . . . . . . . . . . . 79 Ground Water Quality Standards Violation Sites . . . . . . . . . . . . ;gp ~ Historical Nitrate Levels From Selected Wells Near Project Site 82 Variation in Ground Water Quality at Uarious Aquifer Cross Sections. . 83 Variation in Ground Water Quality at Various Aquifer Cross Sections Map . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 "203" Field Data Average Total Nitrate, mg/1 . . . . . . . . . . . . . 85 "208" Field Data Average Total Nitrate, mg/1 . . . . . . . . . . . . . 87 ~ DSHS Data Average Total Nitrate, mg/1 . . . . . . . . . . . . . . . . gg Location of Depth Selective Groundwater Test Sites . . . . . . . . . . 89 Water Quality from Depth Selective Ground Water Sites gp Summary of Annual Water Balance and Percolation Quality Values for Spokane Valley Suburban Conditions . . . . . . . . . . . . . . . . 93 Wel l Locati ons Doarnstream from Project Si te . . . . . . . . . . . . . 95 Distribution of Wasteayater Treatment Facilities . . . . . . . . . . . 98 ~ Esti mated Effl uent Qual i ty . . . . . . . . . . . . . . . . . . . . . . 100 Noi se Li mi tati ons . . . . . . . . . . . . . . . . . . . . . . . . . . 106 Motor Vehicle Noise Performance Standards . . . . . . . . . . . . . . 106 Exi sti ng Noi se Level s . . . . . . . . . . . . . . . . . . . . . . . . 107 Annual Average Daily Traffic Counts . . . . . . . . . . . . . . . , . 114 Proposed Roadway System : . . . . . . . . . . . . . . . . . . . . . 116 • Location of Public Service Facilities . . . . . . . . . . . . . . . . 118 School Enrollment Expected from Midilome . . . . . . . . . . . . . . . 120 v 40 ~ DI'STRIBUTIOPJ LIST U.S. Environmental Protection Agency, Seattle • U.S. Soil Conservation Se rvice, Spokane U.S. Soil Conservation Service, ConservatTOn Dlstri,ct, Spokane State Department of Commerce and Economic Development State Department of Ecology, Eastern Regional Offi-ce, Spokane State Department of Ecology., Qlympfa (2) (1 to the SEPA Register) State Ecological Commission • State Departr:ient of Fi-sheries State Department of Game, Olympla and Spokane State Department of Transportation, Olympi'a , State Department of Transportation, Spokane State Office of Fiscal Management State Department of Sodial and Health Servi-ces, Olympia ~ State Department of Social and Health Servi-ces, Spokane State Utilities and Transpertation Commi'ssion, Olympia State Office of Archaeology and F{istori-c Preservati-on Spokane County Air Pollution Control Authori-ty _ Spokane County Board of Commissioners (3) Spokane County Building Depa rtment ~ Spokane County Engineer's Office (4) Spokane County Library District (3) Spokane County Park Department Spokane County Planning Commissfon (7) Spokane County Planning Department ("p) Spokane County Prosecutinq Attorney, Civil Division (2) ! Spokane RegionaT Planning Conference (2) Spokane'County Health District, Environmental Health Division (3) Spokane Fire District No. 1 Pacific Northwest Bell Telephone Company Washi ngton Water Power Conipany Washington State Energy Office, Olympia ~ Washington State Department of Natural Resources, Colville Washington State Department of Natural Resources, Olympia Spokane Community Press Spokesman-Review . Spokane Daily Chronicle Spokane City Library (2) ~ Ual 1 ey fieral d ~ Eastern tJashington Health Systems Ag ency ~4Central Valley School District Chester Elementary School, Principal Model Irrigation District Bob Tomlinson (5) • Willard Sharp Joan Honican William Powell, Attorney Valley Garbage Services ~ vi ~ ~ SUMMARY OF THE CONTENTS OF THE DRAFT EIS PROPOSED ACTION • The proposed action is for approval of a zone change and preliminary plat and a waste water di-sposal system for the development of the Midilome residential subdivi,sion., The proposed project provides for the development of approximately 425 homes on 160 acres of margfnal agricultural land in an area south of Opportuni-ty bounded By.Pi•nes, 40th Avenue, 6owdi sh, and 32nd • Avenue. The project sponsor Ys proposTng the centralized collection of sewage and waste water and treatment fn a central activated sludge extended aeration system. The project will be developed i'n phases over a three-year period. PROBABLE IMPACTS . ~ Earth * Disruption, displacement, compaction and overcovering of soil. * Pave or overbuild of 30 percent of the project site. * Minor alteration of topographscal contour of the project site. r * Minor wind and water eroston during construction phase. Air * Temporary dust and pa rticulates during construction phase. * Sl ight i ncrease rn emi,ssions from heati•ng and ai r condi ti oni ng ~ sfystems and fTrepl aces. * Increase i-n traffic rel ated emi ss i ons . Water * Disruption and alteratYOn of existinq surface water runoff ~ characteri'stics. * Construction of impervious su rfaces over 30 percent of the site. * Potential ground water contamination from percolatTOn of surface water runoff. - * Disposal of over six million cuhic feet of treated waste water annually to drainfield located over the aquifer. Potential ground tivater contamination from sub-surface disposal of treated waste water effl uent. F1 ora * Removal of 160 acres of marginal farmland from production. * Replacement of existing flora with domestic landscaping. • Fauna * Decrease in number and diversity of species. * Removal and di srupti on of wi 1 dl ife habi tat. ~ 1 • ~ Noise * Temporary increase in ambient levels during construction. * Increase in noise after development due to increased traffic ~ and suburban res i denti'al acti,vi'ti-es. Light and Glare * New sources of light created, Land Use ~ * CompatiVe wi th surrounding 1 and u ses . * Replacement of margtnal agri,cul tural use wi th more i ntensive resi-dential use. * Construction of 425 new homes. ~ Natural Resources * Consumption of building materlal and energy. * Energy consumption for space lieati,ng and cooling and transportation. * Withdrawal of 160 acres of margtnal land from agricultu ral pro- ` duction. Risk of Explosion or Hazardous Emi-ssi,on * Temporary risk during constructfon phase. Population ~ * Housing for a total population of approximately 1,300 persons. Housing_ * Construction of approximately 425 new homes. ~ Transportation/Circulation * Generation of about 3,400 trips per day. * Internal roadway system paved and curbed. • Publ ic Services * Increase in fire and police protection service requirements. * Increased school district enrollment by 500 students. * Temporary overcrowding of junior and senior high schools. * Increased need for additional school district facilities. ~ * Increased utilization af park and recreational facilities. * Increased roadway system maintenance costs. 10 2 ♦ ~ • Energy * Consume estimated 250,000 tlierms of natural gas. Consume estimated 1.5 to 2.0 mi 11 ion kwh of el ectricity. * Direct and i-ndirect consumntTOn of energy for space heating, ai r condi ti-oni,ng, 1 i-ghttng and transportation. Utilities + * Increase in util i,ty servtce requi,rements. * 4Jater consumption of 14 mT-11TOn ca6ic feet per year. * Generation of si°x mTl 1 ton cu6TC feet per year of waste water. * Generation of 1,100 tons of sol id waste per year. ° Human Health • (Please refer to the secti,on on Ground Vlater Quantity.) Aestheti cs * No adverse impacts identi%fTed. • Recreation * Pdo adverse impacts identi-fied. ArchaeoloQical/Histori-cal • . * No adverse impacts identTffed. ALTERNATIUES No Acti on • - . * Site would remain temporarily in limited agricultural use. * Allows subsequent development with different or greater en- vironmental impacts. * Allows subsequent piecemeal development precluding centralized waste water collection. • Alternate Sites * No applicant ownership or control of alternate sites. * Pose same or equlvalent i-mpacts in terms of traffic, site devel- opment, utility and servTCe demands, noise, light and glare, and ~ air quality impact. * Reduced ground water quality impact if site not located over aqyi fer. ~ 3 • ~ Alternate Development Concepts * Lower density development would mitTgate impact on air quality, traffic generation, noise, schools and other public service and ~ utility requirementso * Lower densi ty woul d resul t i'n higher per uni t cost of housi ng . * Higher per unit development cost for utilities. * Central collection and treatment of waste water less feasible at lower densi•ty. ~ Alternate Sewage Treatment Alternat'rve Land Application System * Tertiary treatment method. * Effluent with low nutria-ent concentration. • * More effective than su6-surface dTSposal. * Requ i-res 50 to 100 acrds of 1 and. * High development cost. * Alternate disposal requi,red durYng wTnter months. * Public health risk f rom water overSpray. • Pond and Lagoon Systems * Effl uent qual i-ty-margina1 wfth nutrient removal equivalent to septic tanks. * Surface di-scharge not feasTbi e due to margi nal effl uent qual i ty and lack of proximi-ty to su-rface water, s! * Would require non-overflow lagoon (50 or more acres of land) or effluent discharge to drainfield. * Odor and other operational pro6lems. On-site Disposal System (Septic Tanks) . • * Function with minimal maintenance. * Effluent quality is not improved over activated sludge system. * Effluent not centrally collected. * No flexibility to upgrade level of treatment. * No infrastructure developed if central corrmunity treatment system is required. ~ MITIGATING MEASURES Earth * Minimize areas of soils disruption. ~ * Plulching and landscaping of disturbed areas. * Fol low natural contourg of 1 and. * Measures to prevent erosion and stabilize soils. Air * Application of water or dust pallative to reduce dust from con- ~ struction. * Traffic detouring where required. 4 i ~ * Implementation of Federal AutomobTle emission control standards. * Proper operation and maTntenance of sewage treatment plant to ~ eliminate odors. Water * Addition of denTtrTflcatTOn anit operations to treatment plant. * Central collectTOn and treatment provides flexibility to meet future needs. Infrastructure for cominantty system developed. * Proper drai-nfi.el d sel ectTOn. * Reduce significantly the density of the developm ent. - * Operation of monitorzng wells. * Buffer zone between dratnfi,eld location and well locations. ~ Flora * Site landscaping i-n areas where vegetation removed. Fauna Site landscaping in areas where vegetati,on removed. Noise * Selec0ve bPrming or vegetatfon along roadways. * Sound i-nsulatfon of homes in hi-gh i-mpact areas. ♦ * Orient homes to mtnimi-ze norse exposures. Liqht and Glare * Landscaping. * Aesthetic design. • Land Use * Lower density development. Natural Resources ~ * Design that minimiies resource consumption. * Utilize energy efficient design featu res. Risk of Explosion or Hazardous Emission None. Population * None. ~ ~ 5 ~ Housi ng * None. . ~ Transportation/Circulatlon * Reduce traffic by encouraging alternate methods of transpo rtation. * Roadway sys tem tmpnov emen ts . * Street names consistent wi-th surrounding area. • Public Services * Increased property tax revenues. * Expansion of school dTStrTCt facilities. * Sidewal ks Yn victntty of school s. * Temporary busing of students or realignment of attendance ~ boundaries. Enerc,ll * Utilization of energy effT-cient desTgn features. • Uti 1 i ti es * Close coordinatlon 6etween sponsor and utility firms. * Buffer zone between drainfield and well sites. Human Heajth ~ N/A Aesthetics N/A ~ Recreation N/A - Ar.chaeological/Historical ~ N/A UNAVOIDABLE ADVERSE TMPACTS Earth • * Disruption, displacement and overcovering of soils on-site. * Pave or overbuild of 30 percent of site. Air * Uncontrollable dust during construction phase. + * Increased emissions from vehicle traffic. 6 . ~ Water * Alteration of surface w3ter a6sorption characteristics. S * Potential surface water contamination of ground water. * PotentYal ground water contamTnati,on from disposal of treated waste water effl uent. F1 ora • * Removal of 160 acres of margTnally productYVe farmland. Fauna * Disruption of wTldlTfe habitat. * Minimal reduction Tn num6er of species. • Noise * Some increase in ambient noise levels during construction. * Increase in noise levels due to increased vehicle traffic. ~ Land Use * Conversion of 160 acres of marginal farmland into more intensive residential use. Natural Resources * Direct and indirect consumption of natural resources for building material and energy, . * 160 acres of margTnal farmland taken out of production. Ri s k of Expl osi on or Hazardous Emi ss i on , - - * None. Population * Increased demand for public services and facilities. • Housinq * None. Transportation/Circulation Generation of additional traffic over existing roadway systems. Public Services * Increased service requirements for police and fire protection, ~ educational and recreational facilities and roadway maintenance. • 7 ~ * Addition of 500 students to school district enrollment. * Temporary overcrowd i-ng i n sc hoo 1 d i-stri ct f ac i 1 T ti es . Energy ! * Direct and indTrect Yncrease in consumption of energy for - space heating and cooling and t-ransportatTOn. Utilities ~ * Increase in util T,ty servi,ce requirements for the area. Human Health N/A Aesthetics N/A Recreation N/A ` Archaeological /Hi storical N/A ~ • • • ~ 8 . ~ IfIPACT SUMMARY • DESCRIPTION OF THE PROPOSED ACTION The project consists of the phased addition to the existing Midilome Addition residential subdivision. The project is located south of Oppor- tunity in the northeast quarter of Section 33, Township 25 North, Range 44, ~ Spokane County, lrlashington. The location of the proposed project site is shown on the following vicinity map. The sponsor of the project is Midilome, Inc., aWashington corporation. The project sponsor has submitted to the Spokane County Planning Department applications for preliminary plat approval and zone change from Agricultural ~ to Single Family Residential for the proposed subdivision. The proposed plat consists of a total of 160 acres of which approximately 25 acres have already been approved. The application proposes a total of 425 lots (including the 72 already approved) at a gross density of about 2,6 units per acre. The typical lot size would be 85 feet frontage by 125 feet deep or about 10,500 square feet. A site map and plat design showing the location of the existing r development and the proposed additions are shown on the following pages. The proposed project will be a moderately priced suburban residential development. It wi11 include only single family residential units that will range in price from $40,000 to $60,000. The project will be constructed in , phases and it is anticipated that it will take three years to complete. ~ Lots within the proposed subdivision will be marketed to individual builders who will then construct the homes and sell them to their eventual owners. It is anticipated that Federal Housing administration guaranteed mortgages arill be utilized and therefore the plat is being submitted to the federal Department of Housing and Urban Development for approval. , An interior road system serving the development wi11 link the project with existing State and County roadways. Al1 roads within the project site will be constructed prior to occupation of the homesites. All interior roads will be curbed and paved to the maximum specification of Spokane County and will provide a 50 foot right-of-aray. At the present time sidewalks are not included within the scope of the proposed development, but could be ~ added later if justified by circuiation or traffic safety needs. All utilities will be brought to the building site underground. Elec- tricity and natural gas services will be provided by the Washington lJater Power Company. Water will be provided by the Model Irrigation District. Storm drains will be designed and provided as necessary to dispose of sur- , face water runoff from rain or snowmelt on-site. It is proposed that the existing package treatment plant be expanded to provide waste water disposal for the entire project site. The package treatment plant will be an activated sludge extended aeration system. Ex- cept for the 21 units in Midilome Addition not on individual on-site septic tanks, all waste water from the project site will be centrally collected i and treated. The treated effluent will be disposed of in a sub-surface drainfield. ~ 9 . 1 ~ J9l / D ~ I MLSWkeno PaikM parY w,V Nme Mile Mead A„M p, / Five Mile Proirit ~ aa pleasont Prairie • SevcnMile `i b I , / i ~of , - , p> 's - i hlorgan Acres Ruunl W11r1. RC ~ D ~ n A ~ i_ i z9o • H Pasndcna Puk Trcnlwood ~ ~ I 41 Otis Orcliards P ~ . ~ 2g0 O ~+I1i[W 1 ~ J FtUo Sp k eVal . , - a ~ 01aCw1YA., 90 ~ SoreW- Aw ~ D'ahman I I SOr~9u~Ar~ I ~ 90 ~y Q o ~ Opportunily ' I ~ I o vnr~dald , i = D 291. Aw Ubaty N.'t svo►:AnrurceenAnoNAL p Glenrosa ~ I ,uRpoKr SITE , . . ~ r• , ~u Moran Pmirie lJ ~ a~ I v / VICINITY MAP ~ ~fls h WrJwu M.n.r+N ./ra f V"'L •rw..r~ ~~ILE I ' . 1 • ~ • • . ~ . . • • . ~ ~ . 32ND AVE.NUE • ) • Existing Portion . ~ Midilome Addition ~ j j • j % % / • / o j - Q / ~ E 14 3 j z _j l 1 ~ , , • ~ ' i ~ 40'TH AVENUE ~ SITE MAP ~ N.{I<<ORTH G .4.YDERSO.v, lVC, , I Conscdtcnts m eaaironmenrsf d)ldl~'SIJ, pL11UOt(Q, ecosiomns 200 Eeet ~ • ~ ~ , r ~ ~ i , 'E 1 . , 32ND AYErvE - - ' _ ro 3_ p 5 `7 $ 9 to rl fa ~ e- ~ ~ 3 14 ~ ~ • !J ~ rc r s 9 . a portion ~ „ xistin~ 1, ~ ' • Aaaition f ~ Niidilome 's . ~ ~ 13 l+~l ~ a~' 7 !Z 8 ~!i 1 'f t !Y ,o s ~3 I ~ lo q A s r~ 7 ~ t J1 ~ ' g i/ L 9 !D rt 1 il tr I g 13 13 r~ ~ 7 zl ~ ' 2 3 n s c ~ y; (f y O ~ h !y t3 20 t ~6 iJ is t~ , r x 22- ~9 23 10 t 2 3 y s ~ o 8 ~S 4 ~ / 7 ~ IL ro ~I 1~ ~g 5 !7 a ~ r # i ~ 13 Jl !3 I y 9 1 ~ I i 5 8 (f 1 ~ :1.0 r9 ` r` - ro I r 3r 23 13 F j3 ia ~ 9 ~ S 24 ~ J . 1 11 ! ~ /B 7 . . ~ - , ~ to ri 17 8 z . ~ , ~ 9 . ta g 6 . c ~ r5 ~ _ 9 q 16 44 9 6 t 8 1 ' la JE 3 ` , t y Ir + 1 3 4 ~ ` f4 r7 y~ ,J t1 I~ ta 9 's u t 8 ? !3 ~ 16 1 " ~i 40TH AvE;" U-E . A neers, En~ pson E. Sim SOURCE: C1~ence ''~E~~►'~N ~ . pl.AT ~ 200 Fe2t' ~SrJt (tiC:, tsrtrttit~+c[JWrrt~c> H..%tcC)RTH .uiali sis. p ~ ~ntul~.mts in enrrrvaenenw! 12 ~ E-XISTING CONDITIONS The material in thi s section i's a brlef sur►m-ary of i nformati on de- ~ veloped in considerably more detaTl Tn Appendi-x A to this EIS. To facili- tate cross referencing for those reviewers urishing more information about a qiven subject a rea, the present secti•on has 6een structured to parallel the basic categorical structure of Appendix A. Page references to the rele- vant portions of AppendTx A are proviaed at the beginning of each section below. ~ Elements of the Physical EnvTronment (.see pages 41-1-10) 1. Earth (see pages 41-47) The s i te for thd proposed proj ect Ts. 1 ocated on a rel ati vely fl at, ~ slightly undulating arid slopTng p1aTn of glacial and flood deposits on the Spokane Ualley floor. The geologTCal substructu re is composed of unsorted deposits of boulders, cobbles and gravel mixed with sand in places. The two major soil series found on the project site consist of Springdale (Sx6) and Garri-son (Gm6), and present few constraints on the development of the proposed project. The topography of the site is rela- ~ tively flat with slopes of less than five percent. This flat terrain with soils that are characterized 6y rapid permeability result in a situation of slight erosion potentialo There are no unique physical features on or about the project site. 2. Air (see pages 47-56) ~ The air quality in the area of the project site is dominated by the atmospheric stability of the Spokane river valley and the industrial and traffic related emYSSions generated on the valley floor. The site is lo- cated in an area where there are presently no violations of any ambipnt air quaiity standards and is not within the designated nonattainment area for Spokane County. There are not any unusual or obnoxious odors present • on the proj ect si te. 3. 4Jater (see pages 56-103 ) ~ There is no surface water on the project site, nor are there any major drainage channels or poorly drained depressions. The site is well drained with most storm water disposed of on-site by absorption. The site is not a flood plain. The project site overlies the Spokane-Rathdrum Prairie aquifer, which ~ is the prima ry source of drinking water for approximately 350,000 persons in Washington and Idaho. The project site is located near the margin of the aquifer in the area south of Opportunity. In this area the aquifer has a lower flow rate and transmissivity and is thinner than-in the main body of the aquifer to the north. These conditions result in lower ground water velocities near the project site and possibly less mixing. The depth to ~ the water table is 70-90 feet in the vicinity of the site. 13 ~ ~ The aquifer is recharged by percolation of surface water runoff and underflow from adjacent highlands, 6y percolation of precipitation, by seepage from the Spokane river, by seepage from lakes which lie adjacent to the aquifer and by percolation of i-rrTgation water diverted from sur- ~ face water sources. Some surface recharge probably occurs in the area south of the project si te at the sink area where Plouf Creek di sappears . The literature and data to date contfncaes to show a conflict over the probability of waste water dTSposal arai-nfields as a source of aquifer recharge. • Available water qualTty data.Tndicate that the aquifer generally yields water of excellent quali-ty. Contaminant levels in excess of the Federal drinking water standards have 6een exceeded in only a small num- ber of the many sampl es that have been taken from the aquifer. Some of these violations have occurred Tn the vTCi-ni-ty of the project site, but have been related primarily to iron levels which is related to aesthetic ~ rather than heal th considerati•ons. The avaiTabl e water qual i ty data show that while the concentration of any one chemical constituent may vary from sample to sample at a particular site, there are no long-term trends in changing water quality apparent. No trend of changing nitrate levels are apparent from the datao The avaTla6le water quality data does indicate that there are some water quality variations within the aquifer. A moderate ~ inc rease in salt content i-n the aquTf er.has been noted as it passes from the state line through the Spokane area. The source of this increase in salt concentration is unknown at this time but could be related to surface recharge or natural geologic and hydrologic mechanisms. Preliminary data also indicates that some areas near the margin of the aquifer, including the project site, have higher salt concentrations than does the main body of the aquifer to the north. The hTgher salt concentrations may be the result of ~ lack of mixing and fl:ow in the margins of the aquifer or may be the result of surface runoff from the adjoining hills or surface recharge from the area above the aquifer. The results of depth selecti-ve samplings to date indicate that the ground water generally is of uniform quality over-depth. 4. Flora (see page 104) • The project site contains about 160 acres of land which at one time was cultivated with agricultural crops. At the present time about 60 acres of the site are in cultivation with alfalfa. The renainder of the site sup- ports a continuous cover of herbs and forage grasses, mostly weeds and alfalfa.persisting from prior cultivation. • 5. Fauna (see pages 104-105) The project site provides a habitat for a variety of wildlife species. Migratory species that may ocassTOnally be found on the site include white tail deer, cougar, bobcat, strTped skunk and jack rabbits, as well as a ~ variety of upland game birds. There are no rare or endangered species inhabiting the site. There are no on-site fish habitats. • 14 • ! • 6. Noise (see pages 105-107) - The ambient noise levels in the tmmedTate vTCinity of the project are • generally low, with a background level of 44-48 decibels. This is attribut- able to the relatively undeveloped nature of the location. Noise intrusions are primarily due to traffic flow- with l evel s ranging from 49 to 51. Monitored peak levels from the si-te ranged to 61 decibels. 7. Lilght and G1 are Csee pages 107-108 ) • There are no sources of 1 i-ght and gl ar-e in the i nterior of the proJect site. Around the boundaries there are street lights. 8. Land Use (_see pages i 08-109) ~ The project site is located south of the Opportunity suburban area, and 1 ies between developed resTdenttal areas to the north and arest and vacant or agricultural land to the east and south. At the present time about 60 acres of the project si'te Ts cal ti'vated wi th al fal'fa wi th the balance cleared and vacant land. TFte project site i s zoned agricul tural . ~ 9. Natural Resources (see pages 109-110) Approximately 60 acres of the project site is currently cultiva ted with alfalfa. In the past the entrre project site was used for the culti- vation and production of agricultural crops. The site is considered only marginal farm land and past yTelds have not been exceptional. i 10. Risk of Explosion or Hazardous *Emission (see page 110) N/A Elements of the Human Environment (see pages 111-125) , 1. Population (see page 111) The population of the Spokane Va11ey has experienced steady and rapid growth since 1960. PopulatTOn projections indicate that the recent histori- cal growth trends wi11 continue. . ~ 2. Housinq (see page 112) Housing, as a function of population, has shown a steady and rapid rate of growth in the Spokane Valley. The Spokane Valley is the portion of ° the County experiencing the most rapid rate of growth. ~ 3. Economics (see pages 112-113) Prior to development the project site had an assessed valuation of $114,800 which produced real estate taxes of $2,688 du ring 1977. • + 15 ~ 4. Transportati on/Ci rcuT ati on (see pages 113-117 ) The project site is ser-ved 6y a network of state and County roads. Pines Road, Bowdish and UnTVersity streets are the prima ry north-south • traff ic carri ers i n the area connecti,ng the area south of Opportuni ty wi th Sprague Avenue and Interstate 90. P1nes Road and the Dishman Mica Highway both provide direct access to Interstate 90, approximately 2.5 miles north of the project site. 32nd Avenu e T-s the prTmary east-west traffic carrier in the vicinity of the project site. • 5. Publ ic Services (.see pages 117--1 22) The project site is located wi-thTn the 6oundaries of Fire District No. 1, which serves an area of approxTmately 74 square miles in the Spokane Valley. The Fire District operatps sTx stati-ons in its service area at the present time: The closest stati,on to the project site is Station No. ~ 1 located at E. 10319 Spragae Av enue. Law enforcement services are provided by the Spokane County Sheriff's Department. The project site i-s located i,n patrol district no. 3 tivhich covers about 50 square miles in the Spo{:ane Valley. • The projected si te i s locatedw4thin the Central Val 1 ey School Di strict. The District operates lII school faci-lities from grades kindergarten through high school. Nearly al1 of the schools i,n tlie district are operating at or near their design capacity. The district has under contract the construa- tion of two elementary schools, 6oth of which will be in operation no later than September of 1979. The district is now finalizing plans for the con- ` struction of a new high school and junior high school as well and one additional elementary school. Existing plans call for these schools to be in operation by September of 1982. The proposed project would be served 6y the parks and recreation program of SpokanA County. The County is at the present tim e developing ~ a park site adjacent to the project. 6. EnergX (see pages 122-124) At the present time the project site does not include any consumption, transfer or generation of energy except for the first phase of the project ~ which is now under development. Electricity and natural gas are served to the area by the Washington Water Power Company. 7. Utilities (see pages 124-125) The project site is not presently served with water. There are private ~ wells near the project site that are used for irrigation of nearby agricul- tural fields. It is proposed that the project site be annexed to the Model Irrigation District. Valley garbage service provides solid waste disposal services for the Spokane Valley area. The waste is disposed of at the Spokane County operated . sanitary landfill at hlica, Washington. 16 • ~ . 8. Eluman Heal th (_see page 125) The proposed project sTte does not presently pose any haZards or risk ~ to human health. 9. Aesthetics (see page 125) The project site is cleared and vacant farmland and retains no signif- icant or unusual aesthetic valuea • 10. Recreation (see page 125) There are no existing or planned pu6lic recreation facilities in the project area. ~ 11. Archaeological/HTStorTCal (see page 125) The site of the proposed project does not include any significant archaeological or historical resourceso , . • ~ • • • • 17 ~ ~ THE PROBAaLE IMPACT OF THE PROPOSED ACTI'ON The material in this section is a bri-ef summary of infornation de- ~ veloped in considerably greater detail i,n Appendix A to this EIS. To facili- tate cross-referencing for those revi'ewers- wishing more information about a given subject area, the present section has been structured to parallel the basic categorical analysis of Appendix A. Page references to the rele- vant portions of Appendix A are provided at the beginning of each section below. • Elements of the Physicai Environment (see pages 41-110) 1. Earth (see pages 41-47) The proposed acti-on will not result i'n any unstable earth conditions or changes in geologic structures. The proposed action will result in the ~ di s-rupti on, di spl acement, compacti•on and overcoveri ng i n those porti ons of the site designated for development. Approximately 30 percent of the pro- ject site will be either built upon or paved over. No significant altera- tions in the overall topographical character of the project site are anti- cipated. • The development activities such as excavation, grading and lot con- touring will remove the existi-ng vegetative cover from the on-site soils and increase the potenttal for both wi-nd and tivater erosion. This potential would be the greatest during the construction phase of the pnvject. 2. Air (see pages 47-56) ~ During the construction phase of the project, dust and particulate emissions from land cleari,ng and building activities is a potential on-site nuisance problem, but i's not expected to have any perceptible impact on am- bient air quality levels in the area. • Except for emissions from space heating, fireplaces, and air condition- ing systems, the proposed project will not be a direct source of any air pollutants. The operation of the development will be an indirect source of pollutants in that it wi-ll tend to attract additional automobile traffic to the area. The anticipated traffic generation as a result of the project is not significant enough to result in any perceptible increase in ambient ~ pollutant concentrations. The project may involve the expansion of the existing sewage treatment plant on the project site. Such plant may be the source of obnoxious odors when not operated or designed properl.y. ' 3. Water (see pages 56-103) ~ The proposed project will result in the construction of impervious sur- faces over about 30 percent of the project site. The creation of impervious_ surfaces over the soil will disrupt and alter existing surface water runoff and absorption characteristics. Surface water runoff from the site will be ~ disposed of in a system of dry wells and catch basins with no provisions made for the treatment of this water. Stom, water runoff can be expected to contain minor amounts of ground water contaminants including suspended 18 ~ ~ solids, petroleum based hydrocarbons, dissolved inorganic salts among others. ~ The majority of the contaminants are subject to substantial removal as the water percolates through the soil column above the ground water. The project is located near the margin of the aquifer where the trans- missivity and flow of the aquifer are lower than in the main body of the aquifer. While it is not anticioated that the proposed project will have ~ any effect on the geology or the hydrology of the aquife r, the existing con- ditions will have a bearing on the potential for water quality degradation from project related effluents. It is estimated that the proposed project will result in the withdrawal of about 14.9 million cubic feet of water annually from the aquifer for domes- ~ tic, sewage disposal and irrigation uses, of which about 6.1 million cubic feet per year would be available for recharge to the aquifer. This anticipated consumption represents a very small percentage of the total flow of the aquifer and poses no threat to existing supplies. The proposed project will result in the disposal of treated waste water ~ effluent to a subsurface drainfield located above the aquifer. The broject will generate an estimated 6.2 million cubic feet of waste water per year, a portion of which would be available for oercolation to the ground water. The chemical constituents of the treated waste water are potential contami- nants of the ground water. While the effluent from the proposed activated sludge sewage treatment system is improved over that of septic tank systems ~ and is presently considered the best available and reasonable method of waste water disposal for the project, the system is relatively ineffective in removing dissolved solids including nitrates from the waste water. The quality of the potential effluent reaching the aquifer from a subsurface drainfield will be improved over the quality of the effluent discharged to the drainfield because of biochemical treatment mechanisms that occur as , the effluent passes through the soil column above the ground water. Soil systems do not generally retain anions including nitrates, chlorides, sul- fates and bicarbonates. These dissolved inorganic material move with the drainage waters and may pose a potential threat to ground vrater quality. It is not expected that the proposed project will result in the violation of any drinking water standard. • 4. Flora (see page 104) The proposed action with its subsequent development would result in the permanent disruption of the current agricultural use of the project site. approximately 160 acres of marginal farmland will be taken.out of production. • Most of the herbs and grasses that exist on the uncultivated portion of the project site will be removed for the construction of roads and resi- dential structures. The existing flora will be replaced with domestic lawns, shrubbery and foliage. 5. Fauna (see pages 104-105) • ~ 19 • ~ It is anticipated that the proposed project would result in some de- • crease in the number and/or diversity of wildlife that inhabit the area. The construction of the residential development would result in a permanent disruption of habitat for the large game animals. The smaller game animals may be forced to relocate but should generally remain in the project area. 6. PJoise (see pages 105-107) • During the construction phase of the project some increase in ambient noise levels will occur as a result of heavy duty vehicle traffic to and from the project site and the operation of construction equipment on-site. Upon completion the development should not result in any exceptional noise levels. Vehicular traffic and typical suburban residential activity • will constitute the primary noise sources. r 7. Liqht and Glare (see pages 107-108) The proposed development will replace natural land cover with human settlement features which will add new sources of light. This change will ~ include new artificial street light on the site itself to satisfy safety and lighting requirements and allow for safe circulation within the site. 8. Land Use (see pages 108-109) The proposed project would result in a change in the land use of the ~ site from vacant and cultivated agricultural land to a single family residen- tial use. The proposed project provides for the construction of a total of 425 residential units on about 160 acres of land at a gross density of about 2.4 units per acre. The density of the proposed project is compatible with the surrounding ~ residential uses. In addition the proposed high density residential use is ' necessary to economically support the development of the utility and service infrastructure which will serve the development. 9. iVatural Resources (see pages 109-110) The development of the Midilome residential subdivision wiTl result in ~ the use of lumber, concrete, and other building materials in the construction of homes and the corresponding infrastructure of utilities and streets. In addition to this consumption of natural resources, the development will also decrease the land area now supporting the production of agricultural crops, although only a portion of the project site is currently in cultivation. The ~ land itself will be committed to the proposed suburban residential use for the foreseeable future, and the investment in improvements will reduce the options for alternative future uses of the site. 10. Risk of Explosion or Hazardous Emission (see page 110) The risk of explosion or release of hazardous substances will be a tem- ~ porary one during construction phases of development. It will be limited to 20 ~ ~ construction equipment accidents and improbable natural gas releases during installation of the utility infrastructure needed to serve the residents. ~ Once the development is completed, all safety requirements will have been met and no upsets would be probable. Elements of the Physical Environment (see pages 111-125) 1. Population (see page- 111) • The proposed Midilome residential development would provide a total of 425 units over a three year period. Assuming an average population of 3.2 persons per dwelling unit, this project when fully developed would house a tctal population of 1,300 persons. ~ 2. Housin4 (see page. 112) The Midilome subdivision will provide a total of 425 single family housing units when completed. It is anticipated that complete development of the project will occur in phases over a three year period. ~ 3. Economics (see pages 112-113) Construction costs for the proposed development are estimated at about $11,000,000. An undetermined number of jobs would be created during the three year construction pe riod of the project. An increase in personal income and tax revenues in the local economy would result during the con- ~ struction phase of the project. When fully developed it is estimated that the project will generate a total of approximately $440,000 per year in local property tax revenues. 4. Transportation and Circulation (see pages 113-117) ~ Construction related traffic generated by the project is not expected E to be significant and would be distributed over the three year development of the site. When fully developed it is anticipated that the proposed pro- ject would gene rate an average of 3,400 vehicle trips per day. The development will include an extensive internal roadway system that ~ will integrate with the existing roadway network. All roads within -the project site will be curbed and paved to maximum County standards. 5. Public Services (see pages 117-122) Some increase in the fire and police protection, services will be re- quired as a result of the development of the proposed project and projected ~ population increases attributable to the proposed project. It is anticipated that the proposed project will result in an enroll- ment increase of 500 students in the Central Valley School District. The cumulative effect of this and other growth within the district is placing a • severe strain on existing district facilities. ~ 21 ~ The overcrowding that now exists in district elementary schools will be a problem during the 1978-79 school year. This pressure will be relieved by the opening of the new Greenacres elementary school in September 1978 and the Ponderosa School in September of 1979. School district officials have ~ indicated that with the opening of these new schools, the Chester Elementary would then be able to accommodate the students from this subdivision. The impacts on the junior and senior high school from the project are expected to be more severe. These schools are now operating near capacity and the district plans for new facilities probably cannot be implemented • by the time that the students from the subdivision enroll. This could cause some temporary overcrowding in these facilities until a new junior and senior high school are opened. 6. Energy (see pages 122-124) • It is estimated that when fully developed the project will consume ap- proximately 250,000 therms of natural gas and 1.5 to 2.0 million kwh of electrical energy per year. Current energy sources are adequate to serve the project. The project will also result in an indirect increase in the con- sumption of energy and fossil fuels for transportation. ! 7. Utilities (see pages 124-125) The proposed project will result in an increase in utility service re- quirements. Water consumption within the project site is estimated to be 14 million cubic feet per year. It is estimated that the project will generate 6 million cubic feet per year of sewage. The sewage treatment plant effluent ~ will be disposed of in a sub-surface drainfield. It is estimated that the proposed project will generate approximately 1,100 tons of solid waste per year when fu11y developed. This waste will be disposed of at the sanitary land fill at Mica, UJashington operated under the supervision of Spokane County. 8. Human Health (see page 125) ~ N/A 9. Aesthetics (see page 125) N/A ~ 10. Recreation (see page 125) N/A 11. Archaeological/Historical (see page 125) ~ N/A • 22 ~ ~ THE RELATIONSHIP BETtidEEN LOCAL SHORT TERM USES OF MAN'S ENVIRONMENT AND ~ MAINTENANCE AND ENHANCEMENT OF LONG TERM PRODUCTIVITY The development of the project site into a more urban character will have an impact on the long term productivity of the property, in terms of its present limited agricultural use. Experience has shown that the agricul- tural productivity of the project site is marginal. The area is not designated ~ as prime agricultural land and crop yields from the site in the past have not been exceptional. The development of urban areas surrounding the project site also diminished its future potential agricultural uses. If the land were not developed at the present time it is unlikely that the property would remain in an agricultural use for any significant period of time. The reduction in the limited agricultural use, considered in light of the increasing demand ~ for moderate priced housing in the Spokane area, may be considered an enhance- ment of the long term productivity of the area. The development of the proposed project on the surface above ground water supplies may have an impact on the long term productivity of the aquifer as a supply of drinking water for the Spokane area. The cumulative impact ~ of the proposed project and other urban development over the aquifer utilizing sub-surface drainfields for disposal of treated waste water may pose a threat to ground water quality for drinking water purposes. The sewage treatment system proposed for the project is considered the best available and reason- able treatment system available for a project of this size and scope. It is, however, designed as an interim facility that can be added to as new tech- ~ nology becomes available and the need arises, or can be connected to a central municipal sewage treatment facility if one is constructed for the Spokane Valley. In this context the proposed project is not expected to have an ad- verse impact on the long term productivity of the aquifer as a source of drinking water. • 40 • • S 23 ~ IRREVERSIBLE AND/OR IRRETRIEVABLE COMMITMENTS OF RESOURCES ~ The proposed project should not involve any significant commitments of resources that would be considered irreversible and/or irretrievable. There will be an increase in the consumption of energy and other resources during the construction phase. These are essentially the labor, power, petrochemical fuels and building materials required to prepare the ground ~ and build the structures. Such utilization of resources, although irre- trievable, is not perceived as being exceptional or atypical in the pro- " cess of urban growth and development. The new development will also cause the consumption of energy in the form of electricity and fossil fuels after the construction phase, when homes and other facilities are placed into use. • A total of 160 acres of land will be required for the development of the Midilome subdivision. The conversion of this 160 acres of marginally productive agricultural land into a suburban residential development is an irreversible commitment of land to such a use. Although irreversible, the commitment of the land to residential purposes is considered a more pro- • ductive use of the land. Through the use of a sewage treatment system with disposal of treated effluent to a subsurface drainfield there is a commitment of the soil and ground water underlying the project site for this purpose. This comnitment, however, is not irreversible. The use of the package sewage treatment facility is considered an interim facility that can be upgraded when new ' • technology becomes available and the need arises or connected to a central municipal sewage treatment facility for the Spokane Valley if one is even- tually constructed. . • ~ • • 24 • ~ MEASURES TO MITIGATE ADVERSc IMPACTS • The material in this section is a brief summary of information developed in considerably greater detail in Appendix A to this EIS. To facilitate cross-referencing for those reviewers wishing more information about a given subject area, the present section has been structured to parallel the basic categorical analysis of Appendix A. Page references to the relevant portions of Appendix A are provided at the beginning of each section below. • Elements of the Physical Environment (see pages 41-110) 1. Earth (see pages 41-47) Impacts to existing soils conditions should be minimized by containing ~ earth movement within the road right-of-way corridors, foundation areas, and other sites requiring reconfiguration of existing soils. Where soils have been disturbed they should be returned to natural appearance or built upon or landscaped. Compacting and overcovering of soils should be mini- mized to the extent possible by utilizing allowable minimum widtn roadways and providing off-street parking. • During the design phase, consideration was given to slope, soil con- ditions, natural drainage patterns, and natural ground coverings so that their disturbance was minimized. If at all possible, natural-vegetation should not be disturbed, as they presently retard erosion. Road layout and trenching for water and sewer lines should follow natural contours as much ~ as possible. An adequate storm drainage system will collect excess runoff from impervious surfaces, thus reducing erosion potential. During the con- struction phase, mitigating measures such as mulching can be applied to road cuts and fill to reduce direct erosion hazard. Beyond the construction phase, permanent ground cover should be established on road cut and fill areas and over subterranean water, sewer and utility lines to stabilize exposed slopes. ~ 2. Air (see pages 47-56) During the construction phase of the project, it is anticipated that any dust or particulate emissions will be controlled by the use of water sprays or other techniques as required by Spokane County Air Pollution Control ~ Authority regulations. Automobile traffic related emissions may be controlled during the construction phase by appropriate detouring when necessary to pre- vent construction related traffic congestion or delays. Implementation of Federal automobile emission control standards will reduce automobile related pollutant emissions after completion of the develop- , ment. Proper operation and maintenance of the setivage treatment plant will minimiZe the potential for obnoxious odors. 3. Water (see pages 56-103 ) a The potential impact of nitrate contamination of the ground water could be mitigated by the addition of nitrification and denitrification unit opera- tions to the proposed waste water treatment facility. These operations are extremely expensive when applied to small treatment facilities. In addition they add significantly to the complexity of operation of the plant, increasing ~ 25 ~ the possibility of system malfunction and upset. At the present time nitri- fication-denitrification unit operations are not employed on any sewage treatment facility in Spokane County, including the City of Spokane treatment ~ plant. The selection of an interim package treatment facility for the proposed project is a factor that will mitigate the long-term impact that the project may have. Such interim facilities are not designed to be permanent installa- tions but have the flexibility to be modified to provide a greater level of ~ control or be replaced in the future by central treatment facilities or by more elaborate small systems. The collection and distribution system is al- ready provided and the cost of connection to a central treatment facility would be minimized if it is determined that such a facility is necessary. Proper drainfield site selection will also mitigate the potential for ground water contamination from percolation of drainfield effluent. The ~ drainfield should be located to avoid areas where the water table is shallow, slopes are steep or soil permeability is excessively high or low. The potential impact of this project could be mitigated by reducing the density of the proposed project. This would have the effect of reducing proportionately the level of contaminant that must be controlled, treated • and/or disposed of on the surface above the aquifer. Lowering the density of the project, however, may work against an ultimate solution to the prob- lem of ground water contamination from drainfield effluents. Low density developments will be substantially more expensive to sewer if it is deter- mined at the completion of on-going studies that a central sewage treatment ~ facility is needed for the Spokane Valley. ~ The potential of project related drainfield or surface water effluent contaminating the ground water could be mitigated or prevented by the operation of monitoring wells between the contaminant source and drinking water supply weils. These wells could be used to identify water quality trends or problems at the earliest possible time. ~ 4. F1 ora (see page 104) The disturbance or removal of existing natural vegetation may be miti- gated and in many areas enhanced by the use of domestic landscaping. • 5. Fauna (see pages 104-105) The retention of as much natural vegetation as possible will preserve some habitat for the smaller game animals and birds. Landscaping and planting of various shrubs, trees and foliage will encourage certain fauna species to co-exist with humans in an urban environment. ` 6. Noise (see pages 105-107) The noise levels for normal residential activities and increased traffic cannot be reduced. Selective berming along heaviiy travelled rights-of-way or design features such as the absence of windows facing the noise source 0 could attenuate noise levels for adjacent residents. Those dwelling units sub- ject to higher noise levels could be sound insulated with heavier wa11s and double paned windows, and oriented to minimize intrusion of noise into the more sensitive living areas. 26 0 ~ The use of properly maintained equipment with accepted noise attenuating apparatus will help to reduce certain noise levels related to on-site con- ~ struction. 7. Light and Glare (see pages 107-108) Street lights will be designed to County requirements and to create an aesthetically pleasing image in the neighborhood. Retention of as much existing vegetation as possible would help to reduce the impacts of light ~ and glare. 8. Land Use (see pages 108-109) The impacts resulting from the increase in the intensity of the land use of the site could be mitigated by the development of a lower density ~ project. This, however, would have the effect of increasing the price of the housing units and limiting partially the housing opportunities for moderate income families. In addition it could effect the economic feasi- bility of providing a utility infrastructure for the project. 9. Natural Resources (see pages 109-110) • The consumption of natural resources during the construction phase of the project can be minimized through architectural design and the implemen- tation of energy conservation techniques. The consumption of natural resources during the operation of the facility can be minimized by the utilization of energy efficient design features. • Elements of the Human Environment (see pages 111-125) 1. Population (see page. 111) None. • 2. Housing (see page 112) Restrictive covenants requiring approval of construction plans will help guarantee that the design of the housing units integrate with the other housing in the area and the environmental characteristics of the project a site. 3. Economics (see pages 112-113) None. , 4. Transportation and Circulation (see pages 113-117) Transportation impacts can be mitigated by reducing project related traffic through encouraging the use of carpooling and by improving the road- way network in the vicinity of the project site. The naming of the streets within the project site to be consistent with the surrounding roadways would ~ help circulation in and around the project site. 5. Public Services (see pages 117-122) ~ 27 i In general the increased demand for public services as a result of the project will be mitigated by the increased property tax revenue gen- erated as a result of the project. • The impact on the elementary schools will be mitigated by the expansion of facilities planned by the district over the next 18 months. The peak impact from the proposed subdivision would not occur until after the new facilities were opened. Because the elementary school lies adjacent to the proposed project the safety of children walking to school could be enhanced by a provision for sidewalks, on at least one side of the street, in the ~ area near the school. The impact on the junior and senior high schools would be only temporary until the district were capable of opening new facilities to accommodate the growth in housing within the district. The temporary impact could be miti- gated by the realignment of school attendance boundaries and busing students • to less crowded facilities in the district. 6. Energy (see pages 122-124) The proposed development could employ innovative conservation measures which would result in reductions in potential energy consumption. The re- • quirement for plan review by the developer will result in the opportunity to incorporate construction design features to obtain greater efficiencies in the utiliZation of energy resources. 7. Utilities (see pages 124-125) • The close coordination between the project sponsor and the effected utilities should mitigate potential problems. The location of any new wells on the project site should take into careful consideration the proximity and location of the proposed sewage treatment drainfield. ~ 8• Human Health (see page 125) N/A 9• Aesthetics (see page 125) ~ N/A 10. Recreation (see page 125) N/A • 11. Archaeoloqical/Historical (see page 125) N/A • 28 . • ~ ALTERNATIVES TO THE PROPOSED PROJECT • The SEPA Guidelines require the EIS to include ..a description and objective evaluation of any reasonable alternative action which could feasi- bly attain the objective of the proposal". These guidelines [WAC 197-10- 44002)] note that reasonable alternatives shall include any action which might approximate the proposal's objective, but at a lower environmental cost or decreased level of environmental degradation. Also, the use of the term r "reasonable" is intended to limit both the number and range of alternatives that shall be descri-bed and evaluated, as well as the amount or level of detail which the EIS shall employ for each alternative that is discussed and evaluated. The analysis of alternatives should be, however, sufficiently detailed to permit a comparative evaluation of each alternative and the pro- posal. • The alternatives to the proposed residential development that may be given consideration include: (1) retain the project site in its present undeveloped state (no action); (2) development of the project on an alter- nate site; (3) develop the site with a different concept and at a lower den- sity; and (4) alternate methods of waste water disposal that may be utilized. ~ Each of the alternatives is discussed below. l. Retain the Project Site in Undeveloped State (No Action) The application of the no-action alternative would mean that the pro- ject would not be constructed. The site would remain in its present un- ~ developed state with a limited agricultural use. The land would remain in this use until some other form of development is undertaken. The area sur- rounding the project site is developed in suburban residential uses. It is probable that the project site would be eventually developed into residen- tial or residential-commercial uses. It would appear that unless an inte- grated land use approach is taken to the development of the project site, the , piecemeal uncoordinated development of the area would preclude adequate planning, development and control of traffic, consideration for drainage and effective methods of waste water disposal. The use of an interim package waste water treatment facility for the area would be impossible for any piece- meal development of the site. ~ 2. Development of the Project on an Alternate Site The alternative of developing the residential project in a different location is not a serious option available to the project sponsor since they do not own any similar parcels of land. Even if this alternative were avail- able, however, it could result in several adverse impacts. Building areas in , the Spokane Valley, comparable in size to the proposed project site, tend to be located further from the commercial, employment and cuitural centers of the community. This results in the increased use of the automobile for travel; makes mass transportation more difficult to implement; and increases air pollu- tion, noise and energy consumption. The development of the project on an alternate site could reduce the potential adverse impact on ground water quality , if the site did not overlie the aquifer or were located over the center rather than the margin of the aquifer. 29 • ~ 3. Alternate Development Concepts The development of the project site at a substantially lower density ~ than the 2.6 units per gross acre proposed would have both positive and adverse environmental impacts. At a lower density the impact of the project on traffic generation, air pollution and noise would be proportionately re- duced. In addition the expected impact upon school enrollment and the utili- zation of other community facilities and services would be mitigated. On the other hand development at a substantially lower density would result • in a higher per unit development cost in terms of both land and utilities. This would result in an increase in the price of the housing that would be provided. Even a moderate increase in the price of the housing would tend to reduce its availability to moderate income families. It is probable that at a lower density the centralized collection and treatment of waste water would not be economically feasible and that the use of individual on-site ~ septic tanks would be required. This would have the effect of increasing the potential for ground water contamination. As is discussed below, septic tanks are a less effective method of waste water treatment than the activated . sludge system extended aeration system that is proposed. In addition the lack of central collection of sewage from on-site systems greatly complicates the task of developing an area wide sewer system for the Spokane Valley. ~ 4. Alternate Sewage Treatment Systems The choice of the most environmentally and economically sound waste water treatment system can be a difficult decision. A number of variables must be considered: quality and fate of the final effluent, capital and ~ operating costs (including power consumption and maintenance requirements), areal requirements, quantity and characteristics of sludges generated, as well as state and local regulatory restrictions. A wide range of available options were evaluated with respect to these variables. Specifically, the following options were explored:, on-site treatment and disposal; lagoons and stabilization ponds; small (less than 1 million gallons per day, MGD) ~ treatment facilities; and land application. Exhaustive description of each of these options is not feasible in this report, but a detailed descrip- tion of the options considered most viable on-site systems and small treat- ment facilities, is included in the Appendix. A brief discussion of each of the waste water treatment alternatives S considered in terms of effluent quality, operational characteristics and economics is provided beiow. These characteristics are summarized in the folloaring tables. Land Application Systems Most land application systems fall into one of three categories: S (1) Rapid Infiltration-Percolation: Waste waters are ponded in basins or in contour ridges and furrows. The soils which receive the waste water must be very permeable to accept the high application rates, which range up to 10 feet/week. - . S 30 • , • ~ ~ • • ~ ` ~ ~ ~ ESTIMATED EFFLUENT QUALITY FROM ALTERNATIVE WASTE 6JATER TREATMENT PROCESSES1 Constituent SS BOD5 COD N NN3 P Incoming Waste Water 225 200 450 40 25 10 Effluent from Treatment Process Septic Tanks 50 105 " 30 25 8 Activated Sludqe Conventional 20 15 90 25 20 7 Extended Aeration 20 15 90 30 2 8 Contact Stabilizatian 20 15 90 25 20 7 w Fixed Fill Reactors Low Rate Trickling Filter 25 18 100 25 1 7 Fligh Rate Trickling Filter 30 20 100 30 25 ~ Tower Filter 30 20 100 3 Rotating Biological Disc 25 18 104 25 3 7 Pond or Lagoon 30 • 9 High Rate Aerobic Pond 120 60 ^ 20 _ 4 Faculative Pond 100 40 - 4 Anerobic Pond 100 40 " 20 Aerated Lagoon 80 25 " 20 - 4 Oxidation Ditch 20 15 - 30 - 7 Land Application 5 1 <1 Irrigation 2 2 - Infiltration- Percolation 2 2 - 5 1 C1 Overland Flow 10 5 - 5 1 C1 lAdapted from references 69 7, and 8 of Appendix a, page 172. OPERATIQNAL CNARACTERISTIC OF UARIOUS TREATMENT PROCESSES Conven- Individual Rotating Trickling tional Extended Facultative Land Septic Item Disk Filters Act. Sludge Aeration Ponds Disposal Tanks Process characteristics Reliability with respect to Qasic process Good Good Good Uery Good Good Excellent Good Influent flow variations Fair Fair Fair Good Good Good Fair Influent load variations Fair Fair Fair Good Good Good Low temperature Sensitive Sensitive Good Sensitive Uery Sensi- Good Good ti ve Expandability to meet Increased plant loadings Good, need Limited Fair to Good Fair, need Good additional Good additional units ponds More stringent discharge Good, add Good, add Good, add Good, add Add ponds Additional Poor requirements with respect filtration/ filtration/ filtration/ filtration/ and filtra- pretreat- to suspended solids polishing polishing polishing polishing tion ment W B00 Improved by Improved by Improved by Improved by Improved by tower ap- Poor N filtration filtration filtration fi1tration filtration plication rates Plitrogen Good, must Good, must Good, add Good, add Good, add Poor add deni- add-deni- nitrificationJ denitrifi- denitrifi- trification trification denitrifica- cation cation tion Operational complexity Some Some More Complex Same Simple Simple Simple Ease of operation/ Very Good Uery Good Fair Excellent Good Excellent Excellent mai ntenance Power requirements Low Relatively High Relatively Low Moderate Lotq Nigh High Waste products Sludge Sludge Sludge Less sludge Less sludge Sludge Potentfal odor problems Odors Odors Odors Odors Site Considerations Land area requirements Moderate Moderate Moderate Large plus Large plus Large plus plus buffer plus buffer plus buffer buffer buffer buffer zone zone zone zone zone zone Topography Relatively Relatively Relatively Relatively Relatively RelaCively Orainfield level level 1eve1 level level level level ~ • ~ 0 40 • • 0 40 0 0 • • • 0 ~ ~ ~ ~ ~ • ~ ESTIPMTED TOTAL ANNUAL AND UNIT COSTS FOR ALTERNATIUE TREATMENT PROCESSES WITH A DESIGN FL04J 0F 1,0 MGD Annual Cost, Dollars3 Unit Cost Initial Capita~ 4 5 Cents/ Process Cost Dollars4lCapital 0& M Total 1,000 Gal. Individual Septic Tanks6 8002000 87,832 169669 1049498 28.6 Rotating biological disks 800,000 872832 57,680 1459512 39.9 Trickling filter processes 9002000 989811 58,480 157,291 43.1 Activated sludge processes Conventional 11000,000 109,790 17,O00 186,790 51.2 Contact stabilization 1,0002000 109,790 71,820 181,610 49.7 Extended aeration 500,000 549895 481,800 1032695 28.4 Lagoon and pond processes w Oxidation ditch (with settlin ) 5009000 549895 485800 1039695 28.4 w Aerated lagaon (with settling~ 5002000 54,895 48,800 103,695 28.4 Facultative (aerated surface layer) 2509000 27,447 241,900 529,347 14,3 Facultative (algal surface layer) 250,000 271,441 22,400 49,847 13.9 High-rate aerobic 250,000 219447 249900 52,347 14.3 Irrigation and overland flow Basic system 340,000 371,328 419,540 789869 21.6 With primary treatment .9405000 1C3,302 819540 184,742 50,6 l,lith secondary treatment 19240,000 1363,139 115,950 2829089 69.1 Infiltration-percolation Basic system 200,000 21,958 25,100 471,058 12.9 With primary treatment 800,000 879832 659100 1529932 41.9 lJith secondary treatment 13,000,000 109,790 99,510 209,300 57.3 1 Adapted from reference 6 of Appendix B, page 172, 2Based on an ENRCC Index of 1,900. 3Estimated from Table 14. 4Capital recovery factor = 0,10979 (15 yrs. at 7%). 5From Table 12. 6Does not include drainfield cost. ~ (2) Overland Runoff: Waste waters are applied to prepared, gently sloping land so that it flows slowly through a cover crop such as grass. Some of the water may infiltrate into the soil, but this is not necessary. ~ Overland runoff is adapted to impervious soils, pa rticularly in mild cli- mates, such as those of the southern United States. (3) Spray Irrigation: Waste waters are applied to annual or perennial vegetation (including crops and forest lands) using various types of spray irrigation equipment. Application is usually limited to the growing season ~ of the cover crop. This category may be subdivided into high-rate irrigation (application of > 2.5 in/wk) and low-rate irrigation (application of < 2.5 in/wk). Surface land application provides the most effective method of waste water treatment evaluated, and can be viewed as a method of tertiary treat- ~ ment and not merely a disposal scheme. Superficially, land application may appear to be very similar to drainfield (sub-surface) disposal. It is, in fact, generally far more effective in decreasing the possibility of ground water contamination. This is due to (1) increased evapotranspiration losses during application; (2) decreased hydraulic loadings on the land involved; and (3) biological activity of both the cover crop and microorganisms in the ~ root zone which polish the resulting percolate far more efficiently than the deeper soils of drainfields. However, land application as waste water is not a viable alternative for sma11 scale suburban deveiopments because of its high cost, complexity of operation and potential public health impacts. Based on recorr~nended loading rates a land application system for the pro- posed project would require 50 to 100 acres of land. .A major limitation of ~ land application in northern states is the climate. Spray irrigation is gen- erally limited to the growing season. This requires either storage or alter- nate disposal during unfavorable periods of low temperature and periods when the ground is saturated with rain. Alternative-disposal may involve drain- field discharge or surface water discharge. Pond and Lacoon Waste 4Jater Treatment ~ Despite years of experience with ponds and lagoons, the operating de- sign of these systems is only quasi-theoretical. This has led to a variety of designs: the use of several ponds in systems which can be operated in parallel or series; and add-on unit operations (preliminary sewage screening, final clarifiers, and chlorination facilities). Although there is no consis- ~ tent terminology for the basic types of ponds and lagoons, the following nomenclature is used here. 1. Waste Water Treatment Ponds: Engineered ponds without mechanical or compressed-air aeration facilities. A. High-rate Aerobic Ponds: shalTow (1 to 1.5 feet depth) ponds, • with high algal production. B. Anaerobic Ponds: ponds with high organic loadings (up to 1,000 lbs. BOD5/acre/day) which result in anaerobic conditions throughout the pond waters. C. Facultative Ponds: ponds with relatively low organic loadings (15 to 80 lbs. BODS/acre/day) which maintain aerobic surface • waters and aeaerobic conditions near the pond bottom. 34 • 2. Aerated Lagoons: Engineered ponds with mechanical or compressed air aeration facilities. ~ A. Facultative Lagoons: lagoons designed to provide a moderate degree of physical aeration and mixing, such that sludges settle to the lagoon bottom and create anaerobic conditions near these sludge deposits. B. Aerobic Lagoons: ]agoons designed to provide a high degree of physical aeration and mixing, such that sludges and incoming ~ solids remain suspended, and all lagoon waters remain aerobic. 3. Oxidation Ditches: ring-shaped channels using rotating brushes to provide aeration and having the ability to settle and retain sludges. ~ The effluent quality from stabilization ponds and lagoons is marginal, thus discharge to surface water is limited unless tertiary facilities for effluent polishing are provided. Glhere not discharged to surface waters the effluent can be disposed of in sub-surface drainfields. The land require- ments for a combination lagoon-drainfield operation would be very high. For the proposed project approximately 25 acres would be required. Such a system ~ is not economically feasible for small suburban developments while not pro- viding an effluent quality significantly improved over on-site septic tanks. A non-overflow lagoon would minimize or eliminate the potential for ground water contamination. However, land requirements for such a system exceed even those for a spray irrigation land application system. • On-Site Waste Water Treatment On-site waste water treatment refers to individual facilities which treat wastes from single households. This category includes dry, chemical and composting toilets; single household lagoons; drywells; septic tanks and ~ aerobic treatment units. The most common on-site treatment unit is the septic tank. This system is used extensively throughout the Spokane Valley. The primary function of the septic tank is to provide an effluent which will not clog or overload the drainfield. For this purpose they function well with minimal maintenance, provided that they are pumped as required to prevent the wholesale flushing of solids to the drainfield. Typically ~ the collection system, septic tank and drainfield, operate on gravity flow eliminating the necessity of pumps, which additionally decreases maintenance and operation costs. The primary drawback from septic tanks and other on-site systems is their poor effluent quality. The activated sludge extended aeration system proposed • produces an effluent of improved quality over septic tanks. ~ ~ 35 ~ UNAVOIDABLE ADVERSE IMPACTS The material in this section is a brief summary of information developed • in considerably greater detail in Appendix A to this EIS. To facilitate cross-referencing for those reviewers wishing more information about a given subject area, the present section has been structured to parallel the basic categorical analysis of Appendix A. Page references to the relevant portions of Appendix A are provided at the beginning of each section below. • Elements of the Physical Environment (see pages 41-110) . 1. Earth (see pages 41 -47). Some of the soils within the area of the proposed project will be dis- placed, disturbed andfor overcovered by the development activities. Approxi- ~ mately 30 percent of the project site will be built upon or paved. 2. Air (see pages47-56) During the construction phase of the project, dust and particulate emis- sions from the land clearing and building activities is a potential nuisance ~ problem to the extent not eliminated by the use of dust control measures. Emissions from automobile traffic are expected to increase somewhat after completion of the project, particularly on the arterials surrounding the project site. • 3. Water (see pages 56-103) The possibility that some drainfield effiuent or surface water runoff will reach the water table and carry some contaminants to the aquifer cannot be ruled out. The extent or magnitude of this possible contamination is un- known at this time and is the subject of a number of ongoing studies. The ~ project proposes the use of the best availble and reasonable control techno- logy for the treatment of waste water generated on the project site. The pro- posed system provides the flexibility to meet future waste water treatment needs as they arise. The creation of impervious surfaces over the soil will alter the existing ~ surface water runoff and absorption characteristics of the project site. 4. Flora (see page 104) Approximately 160 acres of marginally productive farmland will be taken out of production. • 5. Fauna (see pages 104-105) The development of the project site will result in a permanent removal and disruption of a portion of the wildlife habitat on the project site. This may cause a marginal reduction in the number of species on the site. ~ 36 ` ~ 6. Noise (see pages 105-107) • During the construction phase of the project some increase in ambient noise levels is expected as a result of the operation of construction equip- ment on the site. The completion of the project will result in the indirect increase of ambient noise as a result of the vehicle traffic generated by the proposed project. ~ 7. Light and Glare (see pages 107-108) None. 8. Land Use (see pages 108-109) ~ The proposed project will result in the conversion of about 160 acres of marginally productive agricultural land into a more intensive residen- tial use. 9. Natural Resources (see pages 109-110) ~ The construction and development of the project site will result in the direct and indirect consumption of natural resources in the form of building materials and energy for space heating and cooling and transporta- tion. Approximately 160 acres of marginally productive farmland will be taken out of cultivation. ~ 10. Risk of Explosion or Hazardous Emission (see pages 110) None. Elements of the Human Environment (see pages 111-125) ~ 1. and 2. .Population/Housing-(see pages 111-112) To the extent that population and housing growth increases the demand - for public services and facilities it may be perceived as adverse. 3. Economi cs (see pages 112:~11 3) ~ None. 4. Transportation and Circulation (see pages113=117) The proposed project will result in an increase in the traffic volume ~ on the roadway system in the vicinity of the project site. 5. Public Services (see pages 117-122) Project related population growth will increase the requirements for police and fire protection, educational and recreational facilities and road- way maintenance. ~ ~ 37 ~ The addition of 500 students to the school district enrollment may cause some temporary overcrowding in existing district facilities and would intensify the need for new school facilities within the district. The over- crowding would be most serious in the junior and senior high schools. • 6. Energy (see pages 122-124) The project will result in the direct and indirect increase in consump- tion of energy for space heating and cooling, lighting and transportation. • 7. Uti 1 i ti es (see pages 124-125 ) The proposed project will result in an increase in utility service requirements for the area. 8. Human Health (see page 125) ~ N/A 9. Aestheti cs (.see page 125) N/A ~ 10. .Recreation (see page 125) N/A 11. Archaeological/Historical (.see page 125) ~ N/A • • • ~ 38 • ~ CATEGORI CAL I t•1PACT APJALYS I S ~ LIST OF ELEMENTS OF THC ENVIRONMEfJT The following list of the elements of the environment is presented pursuant to the requirements of UlAC 197-10-444. "N/A" (."not applicable"} appears beside an item when it is obvious that the proposed action ti-lill not significantly affect the area or subarea of the environment in ques- • tion. The analysis in this impact statement does not address the environ- mental categories marked N/A. All ottier categories are addressed system- atically in this appendix and in the 6ody of thi-s EIS. The order of the discussion is the same as the order of the categories in the checklist that follows here. • This appendix contains a detailed analysis of each category which is not marked N/A. The analysis addresses the existi-ng condition of the en- vironment, the impact of the proposai on tfie environnent, measures proposed or available to mitigate the adverse impacts fdentified, and the unavoid- able adverse impacts that will result if the proposed action is taken. • ELEMENTS OF TNE PNYSICAL EPJVIRONMENT 1. Earth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 1.1 Geol ogy . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 1.2 Soi 1 s . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 1.3 Topography . . . . . . . . . . . . . . . . . . . . . . . 44 ~ 1.4 Unique physical features . . . . . . . . . . . . . . . . . . NJA 1.5 Cros ion . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 1.6 Accreti on/avul s i on . . . . . . . . . . . . . . . . . . . . . N/A 2. Ai r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 2.1 Ai r qual i ty . . . . . . . . . . . . . . . . . . . . . . . . . 48 2.2 Odo r . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 ~ 2.3 C1 imate . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 3. Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 3,1 Surface water movement . . . . . . . . . . . . . . . . . . . N/A 3.2 Runoff/absorpti on . . . . . . . . . . . . . . . . . . . . . . 56 3.3 F1 oods . . . . . . . . . . . . . . . . . . . . . . . . . . . N/A 3.4 Surface water quanti ty . . . . . . . . . . . . . . . . . . . N/A ~ 3.5 Surface water qual i ty . . . . . . . . . . . . . . . . . . . . ti/a 3.6 Ground water movement . . . . . . . . . . . . . . . . . . . . 58 3.7 Ground water quantity . . . . . . . . . . . . . . . . . . . . 66 3.8 Ground water qual i ty . . . . . . . . . . . . . . . . . . . . 75 3.9 Publ i c water suppl i es . . . . . . . . . . . . . . . . . . . . 97 4. Fl ora . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 ~ 4.1 Numbers or diversity of species . . . . . . . . . . . . . . • 104 4.2 Uni que speci es . . . . . . . . . . . . . . . . . . . . . . . 104 4.3 Barriers and/or corridors. . . . . . . . . . . . . . . • • • 104 4.4 agri cu 1 tural crops . . . . . . . . . . . . . . . ~ . . . . . 104 5. Fauna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 5.1 Numbers or diversity of species . . . . . . . . . . . . . . . 104 ~ 5.2 Unique species . . . . . . . . . . . . . . . . . . . . . . . 105 5.3 Barriers anc+/or corridors. . . . . . . . . . . . . . . . . . 105 5,4 Fish or wildlife habitat . . . . . . . . . . . . . . . . . . 105 39 • ~ 6. Noi se . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 05 7. Li ght and gl are . . . . . . . . . . . . . . . . . . . . . . . . . . 107 8. Land use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 9. Natural resources . . . . . . . . . . . . . . . . . . . . . . . 109 ~ 9.1 Rate of use. . . . . . . . . . . . . . . . . . . . . . . . . 109 9.2 Nonrenewabl e resources . . . . . . . . . . . . . . . . . . . 109 70. Risk of explosion or hazardous emissions . . . . . . . . . . . . . 110 ELEMENTS OF THE HUMArd ENV I ROPdMEPJT • l. Population . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 2. Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112 3. Economics . . . . . . . . . . . . . . . . . . . . . . . . . . 112 4. Transportation/circulation . . . . . . . . . . . . . . . . . . . . 113 4.1 Vehicular transportati~on generated . . . . . . . . . . . . . 113 4.2 Parki ng faci 1 i ties . . . . . . . . . . . . . . . . . . . . . PJ/A ~ 4.3 Transportation systens . . . . . . . . . . . . . . . . . . . 115 4.4 Movement/circulation of people or goods. . . . . . . . . . . 115 4.5 GJaterborne, rail and air traffTC . . . . . . . . . . . . . .PJ/A 4.6 Traffic hazards . . . . . . . . . . . . . . . . . . . . . . . 117 5. Publ i c servi ces . . . . . . . . . . . . . . . . . . . . . . . . . 117 5.1 Fi re . . . . . . . . . . . . . : . . . . . . . . . . . . . . 117 ~ 5.2 Pol i ce . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 5.3 School s . . . . . . . . . . . . . . . . . . . . . . . . . . 119 5.4 Parks or other recreati%onal facili~ti~es . . . . . . . . . . . 121 5.5 P1ai ntenance . . . . . . . . . . . . . . . . . . . . . . . . . 122 5.6 Other governmental services . . . . . . . . . . . . . . . . . 122 6. Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 . 6.1 Amount required . . . . . . . . . . . . . . . . . . . . . . . 123 6.2 Source/avai 1 abi 1 i ty . . . . . . . . . . . . . . . . . . . . . 123 7. Uti 1 i ti es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 = . 7.1 Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 7.2 Corrpnunications . . . . . . . . . . . . . . . . . . . . . . . 124 7.3 4Jater, . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 7.4 Setiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 r 7.5 Storm water . . . . . . . . . . . . . . . . . . . . . . . . . 125 7.6 Sol i d waste . . . . . . . . . . . . . . . . . . . . . . . . . 125 8. Human health (including mental health) . . . . . . . . . . . . . . 125 9. Aesthetics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 10. Recreation . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 11. Archaeological/historical . . . . . . . . . . . . . . . . . . . . . . 125 • 12. Additional population characteristics. . . . . . . . . . . . . . N/q ~ ~ 40 • I. - ELEMENTS OF THE PHYSICAL ENVIRONMENT ~ l. Earth 1.1 Geology a. Existing Conditions The foundation of the area i-s formed 6y formations of igneous and ~ metamorphic rocks whi-ch i,s,covered 6y glactal and flood deposits along the SpokanP Valley floor. The s-fte of the proposed project is covered pre- dominantly by flood deposit:; ('Qf) from the Great Missoula Flood of prehis- toric times. These deposi-ts consist of 6oulders, cobbles, and gravel mixed wi`h sand in places. They are mostly very coarse, very poorly sorted and open textured. The marginal parts of the Valley floor contain various pro- • portions of flood transported sand and gravel and reworked Kame and lake deposits, with Kame deposi,ts (Qks) underlying the northwest corner of the site. Kame deposits were formed at the ice margin and ice contact deposits of the Bull Lake Age. These deposits consist of Kame sands and Kame delta sands. • There are no apparent geologi-cal hazards within the project area or site. b. The Probable Impact of the Proposed Acti,on The proposed action should not result in unstable earth conditions ar ~ in changes in geologic structures-. c. Measures to Mitigate Adverse Impacts None. ~ d. Unavoidable Advers-e Impacts None. T02 Soils ~ a. Existing Conditions The primary source of information regarding soils in this area is the Soil Conservation Service. The Soil Su rvey for Spokane County may be uti- lized for much of the soi'l capability information and land use management of the area. However, it should be noted that the soils data presented in ~ the Soils Survey represents typical conditions and that detailed engineering studies are required to determine speci-fic conditions at a particular site. As shown on the following soil map, the two major soil series on the project site consist of Springdale (Sx6), approximately 60 percent, and Garrison (GmB) approximately 40 percent. The Springdale series consists ~ of somewhat excessively drained, coarse textured and moderately coarse textured, gravelly, cobbly soils. The soils are formed in glacial outwash • 41 ~ ~ 32iVD A E / , . Existing Portion ~ ~ ~ . , p~ Midilome Addition ~ % % j ~ GmB • o j Garrison very gravelly Ioam, o ~ E 0 0-8 percent slopes ~ ~ l SxB z ~ / Springdale gravelly sandy loam, deep, 0-20 percent slopes ~ ~ . ~ ~ 40TH AVENUE ~ SOURCE: Soil Conservation Service S~IL..'9 MAP • ~ ~ „ ~ NAWnRm c- .,NaERSO.v, r..•c. , [200 Feet i Cons~~ftants nr arm'rrw~merrtsl a~isi;~tis. pf.+nrrnig, ctorruru:: I ♦ . ~ 42 ~ mixed with some volcanic ash, under ponderosa pine and grass. Springdale gravelly sandy loam, deep, 0 to 20 percent slopes (SxB), is a deep sandy ~ loam soil which has a depth of more than 36 inches to gravel and cobbie- stones. The engineering characteristics of this soil present no apparent constraints to constructing roads, foundations, basements, nor are there any subsurface wastewater disposal ltmitations. The Spokane County Soils Capability maps rate the 1imi'tations for 6asement, trafficability (the soil`.s ability to support road beds) and subsurface water disposal as ~ slight. Springdale soils' resistance to erosion range from moderate to low with a potential soil loss of 5 to 25 tons per acre per year. The Garri son soi 1 seri,es is made up of somewhat excessively drai ned, gravelly or strong soils that formed under grass, in glacial outwash mixed in the uoper part of volcanic ash. Garri-son very gravelly loam, 0 to 8 ~ percent slopes, has essenti'ally the same engineering ctiaracteristics as the Springale soil seri-es. As with the Springdale series the limitations for foundations, trafficability, and subsu rface water disposal are slight. The resistance to erosion is moderate with soil losses in the range of 5 to 25 tons per acre per year for unprotected soils: ~ The site does not lie wTthin an area that has been designated as having either potential for flooding or nataral disaster. b. The Probable Impact of the Proposed Action The proposed action should result in di-sruptions, displacements, ~ compaction and/or overcovering of the soils in the area designated for de- velopment. An appreci-ation of the magnitude of the disruption upon the soils nay be derived from the site plan. Generally, these impacts will be in the form of the various construction activities related to the develop- ment of the proposed project. These activities will include grading, trench- ing, and excavation for roads, underground utility lines, and basements. . Approximately 48 to 50 acres of the site's 160 acres will be disrupted by these activities (30 percent). It fs no t expected that these soils will be removed from the site, but will be redistributed on-site as part of individual lot development. Lesser impacts may result from enhancement of natural drainage ways and landscaping. Once the project is totally developed approximately 30 percent of the • soils will be covered by asphalt streets, concrete driveways and homes. The remainder will, most likely, be landscaped in shrubbery and lawns according to the taste of the individual home owners. c. Measures to Pli ti gate Adverse Impacts ~ Impacts to existing soils conditions should be minimized by containing earth movement within the road right-of-way corridors, foundation areas, and other sites requiring reconfiguration of exis±ing soi,ls. 4Jhere soils have been disturbed they should be returned to natural appearance or built upon or landscaped. Compacting and overcovering of soils should be mini- mized to the extent possible by utilizing allowable minimum width roadways ~ and providing off-street parking. Cuts and fills will be minimized by following the natural contours of the land. 6Jithin the project some -roadway grades have been increased to minimize cut and fill requirements. The re- ~ 43 ~ quirement for individual housing plan review by the developer should be used to avoid unnecessary soils disruption by judicious siting of struc- tures. d. Unavoidable Adverse Impacts ~ Some of the soils within the area of the proposed project will be displaced, disturbed, compacted ana/or overcovered by the development ac- tivities. This impact may-6e largely mitigated through envirvnmentally sensitive site planning. The resi,dual impacts should not be considered significant. ~ 1.3 Topography a. Existing Condi'ti,ons The site of the proposed project rs essentially flat with a difference ~ i n el evation from the approximate hi,gli point of 2,034 feet 1 ocated i n the northeast corner of the site to the approximate l,ow point of 2,008 located in the southeast corner of the site. The topography of the project is shown in the following map. Slopes are generally less than five percent with the exception of the southeast portion ofi the site where a 200- to 300- foot bank reaches a slope of approximately 16 to ZO percent, then lessens ~ to a slope of less than 8 percento The slope of the site's terrain gen- erally slants to the southern portion of the site. The slope and drainage of the site runs generally to the southern portion of the property. b. The Probable Impact of the Proposed Action • No significant alterations in the overall topographic character of the site are anti'cipated as a result of the proposed project. Road cuts and minor excavation activity and subsequent contouring of residual soils will create some minor localtzed topograohic changes. Some cuts for the on-site street system will be required,'6ut these will be nominal and localized. The most significant cut will be one that will traverse the relatively ~ steeply sloping bank in the southeast corner of the site. At this point the terrain rises approximately five feet over a distance of 30 feet (16 percent). However, the prevailing slope over this road section from the high point to low point over a distance of 600 feet is approximately one percent. Some short term erosion, which will be fu rther discussed in a following section, may occur as a result of the construction of roads and ~ buildings in this portion of the project site. This is expected to be nominal, however. c. Measures to Mitigate Adverse Impacts Terrain contouring and revegetation of those areas impacted as a resuit ~ of construction activity should mitigate any adverse impacts associated with the development of the site. d. Unavoidable Adverse Impacts None. ~ 44 • i~ • , D AVENUE ~ o . / . ~ ~ ~ Exishng Porhon ~ A/~~~ h/ • ♦ . ♦ i i / . ~ Midilome Addition ~ . ~ ~i2025' / ~ / o % 2p2Sv ~ Z % / v / , ZOZ~ 201 S' ~ . t o~ ~ 2012p20, 201 S ~ ~ 40TH AYENUE ~ SOURCE: Clarence E. Simpson Engineers, Inc. ' TOPOGRAPHY • h ~ • xiwORTH C- A.VDERSON, iNc. ~200,Feet ( . Cansultmus rn o~wrornrirntsl msul~~sii, pl,,»n;,~8, ecaiurnics • ~ 45 ~ 1.4.Unique Physi•cal Features N/A • 1.5 Erosion a. Existing Conditions According to the Criteri-a for Soil Erosion Hazard of Spokane County Soils, ba th Springdale gravelly sandy, loam (SxB) and the Garrison very • gravelly loam (Gm6) are classifled as havi-ng slight erosion hazard. The existing site is presently covered in residual vegetation from past farming activities. This coupled with the fact that the terrain is gently sloping and the soil is characterized by rapid to very rapid permeability, results in an existing situation of li-ttle erosi-on potenti.al or problwn. - • b. The Probable Impact of the Proposed Action The developmental activities such as excavation, grading, and lot contouring will remove the existing vegetative cover from the on-site soils. This will result i•n an i'ncrease in erosion potential from rainfall and wind. This potential wi11 be the greatest du ring the construction ~ phases of the project, and should be almost completely alleviated after the development has been fully developed and occupied. The potential water erosi on probl em wi 11 be most si-gni,fi,cant where cuts are made for streets and where excavations are made on sloping terrain. However, as previously mentioned, the on-site slopes are very slight (1 to 3 percent) and the soils a re highly perneable, thus erosi-on potential is not anticipated to be a ~ significant problem. c. Measures to Mitigate Adverse Impacts During the design phase, consideration was given to slope, soii con- ditions, natural drainage patterns, and natural ground coverings so that ~ their disturbance was minimized. If at all possible, natural vegetation should not be disturbed, as they presently retard.erosion. Road layout and trenching for water and sewer lines should follow natural contours as much . as possible. An adequate storm drainage system will collect excess runoff from impervious surfaces, thus reducing erosion potential. During the con- struction phase, mitigating measures such as mulching can be applied to road ~ cuts and fill to reduce direct erosion hazard. Beyond the construction phase, permanent ground cover should be established on road cut and fill areas and over subterranean water, sewer and utility lines to stabilize exposed slopes. Standard dust control techniques should be used during the construction phase by the contractors to reduce the potential suspended particulate pro- ~ blems caused by earth moving activities. The establishment of landscaping on individual lots should mitigate any long tem problems that would be associated with either wind or water erosion on the project site. The establishment of vegetative cover over those exposed areas not under ownership of individual lot owners should be . provided by the developer in order to mitigate erosion potential. , 46 i ~ d. Unavoidable Adverse Impacts None. ~ 1.6 Accretion/Avulsion N/A 2. Air • 2.1 Air Quality a. Existing Conditions Federal standards have been set for six classes of primary air pollu- tants: sulfur dioxide, carbon-monoxide, nitrogen dioxi-de, photochemical • oxidants, hydrocarbons, and suspended particulates. The following table compares the State ambient ai'r standards to the maximum ambient air concen- tration measures for such pollutant. The ambient concentrations of sus- pended particulates and carbon monoxide exceed both Washington State and Federal standards in certain areas of Spokane County. Because these two types of pollutants have different origins and are, to a certain extent, ♦ effected differently by meteorological and climatological conditions, they will be treated in separate sections below. Suspended Particulates Suspended particulates consist of any finely divided solid or liquid ~ particles which remain suspended in the atmosphere. Ordinarily suspended particulates are considered to have diameters of 10 microns (1 micron is equal to 1/1,000,000 meter) or less which is a size range that does not have an appreciable settling velocity. This category includes smoke and dusts of various origins. Particulate pollutants have been shown to in- crease the incidence of respiratory illness especially in chronic conditions. ~ Certain particulate matter is toxic and a nuriber of substances are carcino- genic. Particulates can also cause reduction of visibility and result in excessive soiling of materials exposed to the atmosphere. . The sources of pa rticulate emissions are numerous and include industrial point sources, residential space heating, internal fuel combustion, agri- ~ cultural operations, and vehicle traffic over unpaved surfaces. The largest source of particulates is dust entrained in the air through vehicular traffic over paved and unpaved surfaces. This accounts for about 40 percent of the total particulate emissions in the metropolitan Spokane area. A summary of suspended particulate concentrations reco rded for the per- ~ iod 1973 through 1977 for each of the Spokane area monitoring stations is provided in the following table. Federal ambient air standards require that the annual geometric mean TSP levels not exceed 75 micrograms per cubic meter of air. The Federal secondary TSP standard is exceeded over much of the Spokane ~ Va11ey floor. A po rtion of the Spokane area has been designated as a TSP non-attainment area, as shown in the following figure. The project site 47 • I4aximum nK)nitored levels of pollutants (Spokane 1911-1916), TOTAL SUSPENDED 3 CARGOh1 1~10NOXIQE SULFUR DIOXIDE PNOTOCHEMICAL NO , particulates ( g/m ) __(ppm~ _ (p~hmOXIDANT (pphm) (~g~1m• Annual Annual Annual 24 hr, max. Geometric P1ean 1 hr. max. 8 hr. max. 1 hr. max, 24 hr. max. Mean 1 hr, max. Mean , , - fed.l Standard 150 60 35 9 40 10 2 8 100 . , , 1911 327a 86C 40c 1E3c 14a 8a 3a 6a 10c 1972 32lb 100d 31c 11c 16a 7a 2a l0a 88c -0. 00 1973 403~ 81b 33d 22e 19a 5a 2a l0a 121~ 1974 324b 89b 54d 36d 23a 6a la 12a 69c 1915 274b 99f 31h 23a 13a 5a la 9a 52c'9 1976 453b 149b 38 i 27i l4 a 4a la 9a 84c . . Source: Spokane County Air Pollution Control Authority a Gonzaga e5prague and Wall h Division and Buckeye b Zellerbach fAluminum Supply Company i Kershaws c City flall 90ata for two quarters only ~ Columbia Cycle d 14bnroe and Indiana a ♦ 9 0 0 • • • • ~ ~ SUSPENDED PARTICULATE SUMMARY • Stati on 1973 1974 1975 1976 1977 Turnbul 1 bJi 1 d1 i fe Refuge 22.01 21.06 19.06 28 27 Rogers 67.04 55.12 58.81 73 73 • City Hall 75.22 75.23 58.80 81 83 Gonzaga University 82.35 75.47 64.06 83 79 Zellerbach 86.12 89.96 79.64 149 131 ~ Cheney City Hall 59.41 47.80 73 62 Millwood City Hall 59.30 59.02 74 77 Aluminum Supply Company 148.19 99.26 143 127 • University City 97 75 . 4Jashington Water Power 82 70 Cooper Elementary 77 70 • Sheridan Elementary 122 89 East Valley High School 63 41 ~ Sou rce: Spokane County Air Pollution Control Authority. • ~ ~ 49 ~ is not located within the non-attainment area. During 1976 and 1977 the State Department of Ecology and the Spokane County Air Pollution Control Authority undertook a joint study to determTne the nature and cause of TSP non-attainment in the Spokane Area. ihe results of this exhaustive ~ study were that the TSP problem for Spokane i's mainly a fugitive dust problem with dust generated by Spokane's many miles of unpaved roads as the primary contributor. Carbon Monoxide Carbon monoxide is the product of i,ncomplete combustion of fossil ~ fuels. More than 90 percent of the carbon monoxide is generated by gaso- line powered riotor vehicles, with the remai'nder from residential, commer- cial, and industrial heating and power generating units. Carbon monoxide is an odorless, colorless gas. It combines with the ~ hemoglobin of the blood and reduces the oxygen-carrying capacity of the blood. Short term exposures to carbon monoxi-de have been shown to cause changes in cardiQvascular functi-oni-ng and impairment of visual and time interval discrimination. Extended exposure to high levels of carbon monoxide can be fatal. Federal ambient air standards require that carbon monoxide levels not ~ exceed 9 ppm for an eight-hour average more than once per year. This stan- dard is consistently exceeded wttiiin the Spokane Central Business District and along North Monroe and North Divi-sion streets below the hill. The Spokane central business district and portions of the Division and Monroe Street corridors have been destgnated at non-attainment areas for carbon monoxide by the Environmental Protection Agency. The carbon monoxide • sampler locations are shown in the map that follows. The following table summarizes the carbon monoxide levels in Spokane during 1976 as recorded by SCAPCA. The carbon monoxide station located in the Spokane Valley Chamber of Commerce buildi-ng is the station closest to the Midilome development. • Carbon monoxide concentrations, in contrast with particulates, tend to " be very localized and dependent to a large extent on local traffic volumes and congestion. The Chamber of Commerce station is representative of the traffic and congestion conditions typical of urban arterials. These con- ditions do not exist in the area surrounding the project site. It is probable that the CO concentrations near the project site are substantially ~ lower than those o6served at the Chamber of Commerce station. A map show- ing the corridors where CO violations are anticipated follows. b. The Probable Impact of the Proposed Action During the construction phase of the proposed project, impacts on air ~ ouality may result from five sources: (1) dust and particulate from clearing and demolition operati,ons; (2) dust from construction operations; (3) hydro- carbon evaporation from paving operations; (4) construction related traffic congestion near the site; and (5) pollutant emissions from the operation of construction equipment. • 50 • ~ 1976 CARBON MOPdOX IDE LEVELS To ta 1 To ta 1 ~ 1-hour 8-hour 8-hour Violation Station Maximum Maximum Violations Days Department of Natural Resources1 22 16 32 21 • Peyton Building2 24 19 43 35 Post Office3 34 22 65 51 Columbia Cycle4 35 27 118 66 Division Street5 21 16 17 13 i Darl Apartments6 39 17 29 26 Boone Street7 16 12 5 6 Valley Chamber of Commerce8 12 9 0 . 0 Boone Street No. 29 31 16 7 7 ~ Kershaw's 38 24 137 99 Monroe and Indi-ana10 25 16 39 27 Trent Avenue>> 22 16 12 9 City Hall 31 . 21 57 45 • 1 Established 7/20/76. ZSpecial CBD study, established 9/13/76. ~ 3Established 7/19/76. 4Established 7/27/76. SDiscontinued 7/9/76. ~ 6Established 7/23/76. 7Discontinued 11J7/76o 8Established 11/22/76. ~ 9Established 11/23/76. lODiscontinued 4/11/76. 11Discontinued 3/25/76. r ~ 51 Peane Pd US 395 Nawtltorne Rd • , i ' Country (io►nes NOf'1 Attainment ~ rTl°r"9"i?7"" , A r e a 1Y.11'.11. , N90N1TORING STATION SITLS - Pleaunt Prairie Rd . i • ; /////L////////. G~~c w,/ ,ii ii~~-i......i..,...., 0~9 Q X; East Va11cy llidi Schaol ;a/ ~i~~~ ~~~n ~ c Ava Trentwood Rogers Higli Schoul ' /77-/, . 1 777 , , • , ° 4 ~ .a~ c~enaX',arb~ w ; -~~,~~iii~~ii/iii: /~~~~~//iiii/i~(~f~' iii//, /~//iiii - ra~ Ntdi1i'OOd ° sn /////.•////~/////i//1/ t~'i/ 'N~A ~ ~ * - ii, !ii/, ; iii, iiii CoaperSchool ~i~iii~ ~ F'i ii ~ t~ f iiii~'i~ ~ i,7~1 i iii~. Flora Road ~,ii; ii iiii, i i; ~ir. ~i 'ri~ i,7~~iii nA~ i ~ , / ~ , , ~ • / .~i i . L OI1Zaka t~.S.C. 1•90 • 6raadv,~ayAve QWi~~~~~ veradale k/.c LIIy' vlllVeCSII)' C111 SCraguc Avr. i - • ~ . . , 'i. 1-,h . ~ , C 62 1°'//////~ Sl~crid<<n Schuul ~ii ,iiiiiii ii1i~;riiiiirf , . . . . ~~~1 ~ > ••r• %~,/,'~/i'/://'i.'i~t!///////!//i;!/~////// i/,~i,'//////¢ ~ i ab~ ~a1~arti~P 1M~~ o~ar ~arrMWMas~AOU~r ~Sus~ar ~ur~/ N ~ ~ ~ SO MW ] ` ^ OpportunitV D 1 e ~ (7 29th Ave Glenrase 32nd Ave r✓ T ~ f'~ , s~~ 37t1~ Ave ~d' N . H~J~ cd . 44th Ave GS i ' fss Maran Pr~irie ~ o\L MILf:: IIAIJUk7'Ff G,iNUERSON, hSC Cunn+hmiH n+ rm,4unmrNal mialytis, ylu>ming, ctouumics ~ ! • • ♦ • ~ i • • 0 ~ ~ ~ ` • • • • • • • ' , , j ~ `4~ f; 1 ; ` 't . j. ~a . . I , ~'J ~ ~ ~eiuki In SIleS I l _ ~ ~ - ~ \ ~,~~i" ;t ~'~1 ~ , ' t ~ l ~ . ~ f'~~t S , Spul~one Clty Ilal) 2. Kcr~UaHS . ►1 . ~ 1; I ! Y .~1 \ 1 ~ 'y~~" , ~ "I ( ~1~~ Tient b Oruwn 4. Spolone 40l ley Chmiiber uf fmunerce 4.I S. Gnniaqe ~ 6. Monruc 6 Indlona ~ xf ( 7Uvf1 uuk ~1, ! t ~ 7. UiV~)lUII Sll'Lt 1 a~partmcnt of Nalural Resuurces , ~ - , ,c ~ . • ~ :"::d~,.~^~, 9, col1011l1la f,ycle ~ ' ► . ~ > .~i' . , ` I.4t+ ~ 10, Post Offlce Il. Peytun OulldlnIJ ~ • ~ C I . 'y~ ~ v ~ ~ . ~ .t:;:~'~ . T _ ~ ,1 ~ : ~ - ~ . r - • ,r ~ ~ ~ 1^ ~ 1 ~ ~t, . i~ ' , 1 ~ ~ • ~;.~1~ ~ ~ ~ ` ~'4 _ _ J ~ - ~v ~ i. I ( . .S ~ ~ F ( ~ ~ i ~ , ' r ~ ~ ► 1 ~ r~. • _ ` ~ ' ~ , ( ~ r.~ ~ ' ~ 1 t~ ` ~ . ''r. I ~ ~ ~I~ I~1 4~ ~ ~ ~f~~ ~ ~ , I\ \ i~r• y~ ' 1 ~ ,'1. / 1 ' • 1 ~ I~ r- . Y' '~y ' ' , rr~:~~k~ ~ ~ ~ - ~ 7 . ' i l ~ II ~ ~ . - , '~~~}~I,~.r 'i~~ I'' '~"l,~ll~` ~ ~ ~ I I , •~,.5 M,,;,l.. i ~ Y. I . , „~y +~'i,,• ~II ~1~~~' n ,I il I , 1i ~ . ~i`--r ,i~ i ~ ~i ~i; ~ ~ ~ ~ ~ p~:~ V r ' t 1~ ~'~J ~ _ n~ ~ ' I I ~ ~ ~ ~ ~ ~ • r r S ' Y i u NIv~ / - - I . , . ~ ,7i '+I~ ►I i~ 1~1,, L , ~ ~ I ~ ~ ~ ~ 1~ 1~ r♦ ~I i ~t . j I 11 L r ' ~ f1r 1 1 ' 1 1 • ~y ' 1~ M. l . , . ~ t ~.~L ~ , . _ . _ ~ I I ~ ;'(j ,xls. J--~ ~ ~ ~ ~s . . ~ o'T~~~~l~ ~ I ~ , ~ {f'}I}I ,.1' + , ~Yty~ 'I F~ ` ~ - ~ . ' ,I U~ ~ t~ ~ ~ 1' Il Itl i ~ ~,II ~r . a. .w ~ 11 ~ I l ~ ~11~ j ~5 / ~ / . "-1I Y~~ i.~y~ ~ Y ! I4~I~ ~IfI~, ~I, .1~ '~If , f y`' I jl,' II~~j:'Y'(~~ 11 ~~:r~--. _t ! N.. ~T .l ~ ~ r1 l~ I I 1 S1C•~ I~ ~ ~ ~ ~ ~ i~ 1~ ~ 1i . ' ~ t I~ i~h ` ~ ~ ;,\I~ 1 1 w"Y~1t~ WIW'IC ~ ~ 1~• ' 'I ~ I ~ ~ ~ ~ jI (r ~ I ~ I ll ` + ' ~ , 0' ~,4 , n ~ ~ ~ 1, •;x~;, ~ ~ ~ ~~u . , . • ~ j 'I ` ~ _ ~ ~ ~ ~ 'L ~ • ~ ~ ~ I~ ~ ~.a ~I~~~ ~ .1 r ' ~ ~ ~llt . • ~~'f I ' ' ~ ' • 1 ~ ' f ~ ' ` r ~ ~ ' ri • •t 'r' ~ J( I' . jI,I',♦ f'~t~ ~ ~ ~ ' 11 I ~ ~ ~,1 11 4 `(11 ~ ~ ~ ~ 1 ~ ' ~ ' • I' ~ ~ •/\1 I / ) f ~f1 1 ..I' ~i~1~l I~~~i~~l~~ , ~ • ~ l~ "1...~ ~I ~.f~ 1 •:11~~4w \ ~ f I / 1 1,1 C'O Ml)NI'1'UItIN(; S`fA'I'ION SI'I'l:S Source: Spokane County Air Pollution Colitrol Authority ~ Dust from land clearing and construction activities is a potential on-site nuisance problem. In situations when dust production is likely, standard dust control measu res such as water spraying would be used to keep particulate emissions to a minimum. These activities are controlled ~ by local air pollution control regulations and will be conducted in accor- dance with such. Emissions from general construction related traffic and paving opera- tions may be expected to increase during the construction phase of the project but would 6e temporary and Ymperceptible. ~ Completion of the developments should not result in any significant. air quality impacts. Except for emi*ssions from space heating, fireplaces and air conditioning systems, the development will not be the direct source of any air pollutants. It is anticipated that the residential heating sys- tems will operate with either natural gas or electricity. All roads within ~ the development will be paved by the developer. This residential devel'opment while not a direct source of air pollu- tants, except as noted above, may 6e an i-ndirect source of pollutants in that it tends to attract vehicular traffic to the area. It is projected that the Midilome development would result in the addition of approximately ~ 2,500 vehicle trips to and from the area. This traffic generation is mini- mal and it is not anticipated that it would result in any perceptible in- crease in ambient pollutant concentrations. c. Measures to Mitigate Adverse ITnpacts During the construction phase of the project, it is anticipated that ~ any dust or particulate emissions will be controlled by the use of water sprays or other techniques as required by Spokane County Air Pollution Control Authority regulations. Automo6ile traffic related emissions may be controlled during the construction phase by appropriate detouring when necessary to prevent construction related traffic congestion or delays. • Implementation of Federal automobile emission control standards will reduce automobile related pollutant emissions after completion of the de- velopment. d. Unavoidable Adverse Impacts • There do not appear to be any unavoidable adverse impacts as a result of this project. 2. 2 Odor a. Existing Conditions ~ As indicated above a package treatment plant was approved for installa- tion on the initial phase of the project development. Because of the siqnif- icant delay in receiving approval of the effluent drainfield the treatment facility has been operated without discharge to the drainfield by storage of the effluent in holding tanks which is frequently pumped and disposed of ~ 54 • + ' • • ~ xw ' " ~ ~ lr,G .W, ',~J ~ G , , ' . ~ • ~ ,,.,4 rj,11_11,( ,f~~ { ~M •AIWP~ '('1 ~ Q Q 'I It 1 S4dw eGs ~ ~ V 1 du Lli`It~ C, , , " ~ o PR.jjAJf LEGEND w ' . . . . . . 50 _ 150 violaNon days per year. . . pp " 49 vlolatlon days per year. ~i`,f~ , s, . . • ~ _ r . s ii,~,r~• F ` ~ ~ ~ , ~l\ ,.,~~~,<<,~ ~ ! `~y'~ • _ ; ~ ~ , . , . less than 20 violatlon days per year. N.' j 1\ . ~ ~ ~ r•~., , r~,,~ 'r~~ 1 1~0/Ill'8 ~I 1 l~~ r~• 1 4 sN ~ r w .i- ~ ` j •a i@ c i~i~~mi Sumw •.~1' ~ "kr ~ ; i ^ _ , ~`N~. i ^ l~ ~ u u I. ~ P FAS ~A ~ ti• ' ` S ~ _ 1 rJ,;I 1J~ y ~ ~ ~ ~ pR ~~1) w NU~'~(Il - • 1. ~I J ~ - ' ~ ; 1 ~-f ' ~ , ~ ~ C i 1 l~ 1 _ _I / ~ dA ' t pi 1~ S~"' M,a ~e ~~t ~ t • • ~ r, ' ~w itM ~P~~ (1 0~,t~ a, 9 a, Pe16 m PmM 6 L' ~ 1 0~ u I u'~ r~cbn I I ~ 141k ItR TP ai: N~v Idnql~ ,N~~01 - , 1• _ Pa e ~ ~ ur. „ L1 ~ ~ ~ gJp~ " ~ ~~M.~ I,. ~ 'i ~ ~ f►N , _ ` ~~~1• ~1 ~^k' , 1 K ~ .J' (Y~ nAf~i +/pN ~ ~ ~ 4nn L ~ . ' ~ ~ A w. ; 'I~i d a "-i• Cnmcie„ .'Yt ' l.~%r ~ - ~ ' ' ~L e C CMNH `T ~Q .r%y la1 1~ t 1 ~ Nr~{~ A.. Inli t ~ J~ ~ ~~';t'~ 1tt, ~t ~~1 ,~?1~1Y{~ IWJrf'` nl r. •S r, ~ ~ e _J- ~ ~ .f/,' ~ i .1 ~ , , i . ~ ~ ~ r ' - : ' • ~ mlr' 71 W,31 ~ I '(~.Ii,.~^ ~ 1k Lm n ~MM ~ Q I~ { 'u~ ' J 1 , jC,%4qV • ~ I ~~4n.~ ~'.~nn 'h~ n I ! I ~ N'~' V.' yV ~ I Cp Ccancentrations Sourc;c: 5pok,rnr. ('ounly Air ('uiluticm ('onlrol 11uU►nriiy at the City of Spokane sewage treatment plant. The sto rage of the effluent ~ in holding tanks has been a source of some obnoxious odor in the past. Ap- proval has since been received to operate the drainfield and the holding system is no longer used. Other than this temporary situation, which is now corrected, there are not any unusual or significant odors generated on the project site. • b. The Probable Impact of the Proposed Action The proposed project is not expected to have any significant effect on odors generated in the area. During the construction phase of the pro- ject some temporary and localized odors may exist due to the construction and paving activity. The project may involve the expansion of the existing • sewage treatment plant on the project site. Such treatment plants may be a source of obnoxious odors when not operated or designed properly. (See the section on waste water treatment facilities below.)- c. Measures to Mitigate Adverse I'mpacts _ • Proper operation and mai-ntenance of the sewage treatment plant will minimize the potential for obnoxTOUS odors. d. Unavoidable Adverse Impacts To the extent that obnoxious odors from interim waste water treatment; ~ facilities can be minimized or elimi,nated through Proper operating and maintenance practices, there are no unavoidable adverse impacts. 2.3 Climate The impact of local climatological conditions on air quaiity is discussed r in the Air Quality section above. 3. Water 3.1 Surface Water Movement • N/A 3.2 Runoff/A6sorption a. Existing Conditions ! The site of the proposed project has no man-made impervious surfaces that would affect the natural runoff/absorption process. The site is characterized by flat terrain with a natu ral terrace along the southern - portion of the site with slopes of 16 to 20 percent. This terrace, however, is not a significant land feature and comprises a very small portion of the site terrain. Eioth the Garrison and Springdale soil series are characterized ~ by rapid to very rapid permeability, thus absorption is rapid. An engineering study was conducted and a su rface water drainage plan developed for the project site. The drainage plan was designed to meet the following criteria: ~ l. A system of catch basins and dry wells will be installed through- out the site to control surface water runoff. 56 • ~ 2. The drainage system is designed to dispose of all surface water runoff, in excess of that which would occur on the site in its natural condition, wi-thin the project si•te. • 3. The drainage system is designed so that the peak rate of flow of surface water runoff wTll not exceed the peak rate of flow from the site as it now exists. The elements of the surface water dralnage plan are currently being developed. The drainage plan for the project is su6ject to review and • approval by the Spokane County Engi,neers' Departm ent. The potential impact of the su6surface disposal of surface water run- off from the project site is discussed below in the section on Ground Water Quality. ~ c. Measures to Mitigate Adverse Impacts The proper design and maintenance of the surface water disposal system will mitigate the impact of any changes in surface water runoff character- istics due to the fomation of impervious surfaces over the soil. ~ d. Unavoidable Adverse Impacts None. 3.3 Fl oods ~ N/A 3.4 Surface Water Quanti-ty N/A ~ 3.5 Surface 4Jater Qual i ty Pd/a • • • ~ 57 ~ 3.6 Ground Water Movement a. Existing Conditions • The Spokane-Rathdrum aquifer extends from near Spirit Lake and Pend Oreille Lake in Bonner and Kootenai Counties, Idaho, southwest across the Rathdrum Prairie and down the Spokane Valley through the City of Spokane, terminating at the confluence of the Spokane River and the Little Spokane River. The aquifer is the primary source of drinking water for approximately ~ 350,000 people in an area which includes the cities of Spirit Lake, Athol, Rathdrum, Hayden Lake, Coeur d'Alene and Post Falls, Idaho and Spokane, Washington. The recharge zone is that area through which water enters or couid enter into the aquifer. For the Spokane-Rathdrum aquifer the recharge zone is the land'area directly overlying and adjacent to the aquifer as shown on the following figure. There is an upstream headwaters area draining into the aquifer 'recharge zone which contributes approximately 90 percent of ~ the recharge flow to the Spokane-Rathdrum aquifer. This streamflow area which feeds the aquifer covers an area of about 350 square miles and is shown in the following figure. Geology 1 • The Spokane Valley-Rathdrum Prairie aquifer is composed predominantly of Quaternary glaciofluvial deposits which extend from Pend Oreille Lake, Idaho to north of Spokane, Washington. The deposits consist primarily of sand and gravel, fine to coarse, and are poorly to moderately sorted, having scattered cobbles and boulders. The sand and gravel is relatively free of fine sand and silt, except in the uppermost three to five feet, where fine ~ grained material fill most voids in the sand and gravel. In the Hillyard trough, near the downstream end of the aquifer, the sediments become pro- gressively finer toward the north, where the aquifer is composed predominantly of stratified sand but includes some gravel and silt and a few boulders. In most areas, the aquifer overlies the semiconsolidated, fine grained S Latah formation of Miocene age. In some areas the aquifer has abrupt lateral contacts with sloping bedrock surfaces, but in other areas, it grades laterally into less permeable, unconsolidated materials which are not readily distin- guishable from the aquifer material. In such places, the selected boundaries of the aquifer recharge area are somewhat arbitrary. ~ The thickness of the aquifer is not well established. The best data exist where two sgismic surveys have supplemented available drilling data. The seismic data indicate a total thickness of about 400 feet of uncon- solidated material near the Idaho-Washington state line. Because the water table is at a depth of about 120 feet, the saturated thickness of the aquifer is about 280 feet. In the3 Hillyard trough, a test hole showed 780 feet of ~ unconsolidated materials. A seismic interpretation for the same area desig- nated about 160 feet of these material as the saturated part of the aquifer with about 150 feet of unsaturated materials above the aquifer. A diagram of the seismic profiles is shown in the following figure. In general the only wells that penetrate the entire thickness of the ! aquifer do so near its extremeties, in the thinner parts of the aquifer. 58 ~ ~ ~ • • • • ]95 ~ / a a ~ 1 . Mi. Sonauro v.iI. D. .r ` ~ • PCaMNO 0 we Mile Pinitie P(C:U:Ifll vr"Jlfle h" • `i 1 ix Po / , • s N,eWe R4 ~ D a-11q H F s ' k ,I O ~ o'4cn~ 5,pw~'h / . ~o ~ ( i o ~ gp k e "Vall of ` ` I ~i 4~~ / I / ~j ( • ii Ave ~ • / ~ T~ant P Sp-pi. Hr 0 I•1 5Mi0u~ Ar. I • p0 ~ w / Opporwnity t ~ ~ • ~ I Li6erty I.akc ze~n a.. Glenrose - ~ SYUKANHIYI'IiNNAl10NAL ti~~~ I AIHPOR7' I jJ9 ~ U~"~ ' , Dloran Prairie C~ N Z' ~ ApUIV"ER RV:CIiARGE ANL"•A a , 0 19~ H 1 oneeIiLeI S(1URCL: U.S.C.S ~ ~ UNITED 3TATES DEPARTMENT OF TME INTERIOR Prepered in cooperartion with tho OPEN-FllE REPORT 77-829 GEOLOCi1CAL SURVEY U.S ENVIRONMENTAL Pt70TEC'nON ACiENCV PLATE 1 • BpI71SH ~ qL8ERT0 LOLUlASIA ~ . A.ea ol mav ( • ~ ' `YJ WASHINGTON MOtJTANO \ 1140 IoaHO 9 I CAnaoe~• 49 uM~iEO stues 1 °:o/ •11 e~ • • • 17 • • • Sa~taee-«a~er v~es Oie~l/C n v ~ ~ on fnis area are River c., arn un Pla:e tQ. 'B ~ oD ~ •06' • ir° 16 ? Pend 10 u ( Oip~/, 1 I• ~ o I U IB • o I ~ s take 04 y T a¢~0 . o c ' i ~ • tr~r ~ pi~~~ ~ o ~ .'•SPOKARE Coeur , Zp 23 15 14 t 28 d ~ ~ LCkC pl~n• 22 21 . o ~2 y 0 0 /2q 27 ` . 26 3' o . l 25 S' ro. •o,- ~ • ' , - 8 5 •7° . ' ~ 6 ' MISSOULG 7 • • ~ Gio.. 4 ~ Q • . l~ 3 . , . EXPIrANAT ION / Drainage divide of Spokane River- 2 ~ I Coeur d'Alene Lake Sasin. / Q o! E~ Drainage divide oE the Pend Oreille ~ ~ ~ • Lake 8asin. BUTTE A22 Surface-water data collection site and number. • J • ~ SQokane Valley-Rathdrum Prairie ~0 • 10 20 30 40 50 60 MfLES aquifer. I 1 ? ~ I Bal• tren U S GwtoQ,[at 4u-y I~rotrnc~enai Jonl Coen.... oa tolan0io 4•~r 9ertin. 1938, 1' 1, 360,Q00 . i PLATE 1.-- A-fap showing the parts of the Spol:ane River basin and the Pend Oreille River basin, Washington. Idaho. sand Vlontana. which are recharge areas for the Spokrane Valley-Rathdrum Prairie aquifer. ~ , 60 ~ ~ • ~ . • ~ % 'THICKNESS AND SEISl7IC PROFILE OF : : . . : . : : : : : . . . . . . . THE SPOKANE-R.A.THDRUM PRAIRIE • ~ • : ■ . ..i • : ~ .Lake:.':~~.:::. . : • ' : : : • + WASHINGTON i IDAHO . : ::Athol:. : ~ • . . ■ . . : . : ■ ~ . : . . • . : ~ . . ~ i ~ . . . . i Cliico • • ■ • : Hauser ' . • ~ . . : . . . Newman Lake ~ Lake Rathdrum . . . • . . . Ha}~den Lak: : ' : : : Hillyard Protite Post . . . . : : . : . . . ~ : . . . . . . Falls . ~ : • . . . . -4=: ~ : . i • Spokane ~ Coeur d'A1ene ~Valley; . . ~ i ; Spokane : ' j State Line Profile . . ~ . ~ . . . . • ~ , . t.... •~~.ti•''~ ~ Liberty • ~ ]4loran Prairie Lake ~ ~ Coeur d' Alene ~ Lake • . STATE LINE SEISMIC PROFILE m j HILLYARD TROUGH c . a;~ r 1 o SEISMIC PROFILE ~ 20001 ~ o Water.~ T p le z l~ ~ 1$00 _ M _ • t, - Z~ J: ' ~:.',r'~' }?4: T ' ~ 1 r t ~ ~ - ~%~,-5;;1 ~.~~,~'~~•y` ~<i%': i•-r: ,r~;:s., h.'Jy.':" Glactal & Gtacial ~ n ` I60- a.A .u:,- h~~ti~A . : ~~c Wa ter Tabl 0` e ~ > Fluvlal Oeposits ~ :;•.~r . , _w \ ' .1;~,;..~. . :•r~. • R `Z • , O _ _ ~ L . ].1~ ~~iry. .:I~K~~4 ~Y~~~~^f i 11:N J~~~y : •i-~7 ~ 1400- ~ta \ rmation ' \ d ~ 1200- _ - . E I000 . Granlte Rock Granite Rock v' 800 ~ r r r r 0 sO Distance in feet from indicated reference 13L SOURCE: Esveit & Saxon, Consulting Engineers ~ H.ilt'(~7'N L• .9.\'UI:XJ(J.~'. " r--. Cvnfnfr,r,rts nr errearu,uneruJ! ,ru,cf~~n:. pla,u4mg, eco,JUmre. ~ Wells drilled away from the margins generally penetrate only 50 feet or less below the tivater table. • The project site is located near the margin of the aquifer in the area south of Opportunity. In the area the ground water is _thi.nner than in the main body of the aquifer to the north. H,ydraulic Characteristics4 _ • The transmissivity of the aquifer (the rate at which water will flow through a unit width of the aquifer under a unit hydraulic gradient) is gen- erally high. Values calculated by the U.S. Geological Survey for designated parts of the aquifer are shown on the following figure. Transmissivities calculated by the U.S.G.S. range from .13 million ft2 per day in the wrestern end of the aquifer to about 3.4 million ft2 per day near the Washington-Idaho ~ state line. The transmissivity of the aquifer at a certain point is a function of the depth or thickness of the aquifer at that point. As discussed in the previous section the project site is located on the southern margin of the aquifer where the aquifer is thinner. This would result generally in a lower • transmissivity of the aquifer in the vicinity of the project site than in the main body of the aquifer to the north. The finer grained soils which under- lay the project site wouTd also tend to reduce the transmissivity of the aquifer at this point. A lower transmissivity of the aquifer in the vicinity of the project site would result in a lower flow rate per unit width of the aquifer and probably less mixing action than occurs in the main body of the ~ aquifer to the north. Calculated values of ground water velocities are relatively high. U.S.G.S. calculations for the aquifer at the state line indicated a velocity of about 64 feet per day. In an earlier study conducted by the U.S. Army Corps of Engineers a different set of estimated aquifer characteristics r5esulted in a ~ calculated velocity of about 90 feet per day at the state line. For the Hillyard trough the U.S.G.S. calculated average velocity is about 47 feet per day. In the Corps of Engineers study, the velocity was caiculated to be 41 feet per day. These values are relatively high `or a ground water system and indicate that the aquifer is a very dynamic system and not a relatively stable . pool of water. ~ The lower transmissivity and fine grained soils which characterize the aquifer near the project site would tend to result in lower ground water velocities than are found in the main body of the aquifer to the north of the project site. The U.S.G.S. has calculated the rate of ground water flow in the aquifer ~ to be 960 and 350 cu Wc feet per second at the state line and in the Hillyard trough, respectively. Similar rates calculated in the U.S. Army Corp~ of Engineers Study were 1,000 and 200 cubic feet per second, respectively. Water Level s • The water table in the aquifer slopes from the Hoodoo Valley and Lake Pend Oreille, Idaho to the Dartford area north of Spokane, Ulashington. The 62 • d \ <~O• l A1C;1lI Peone Au '3k 1os LEGEND WS 395 'i'ruouniativily (U2JJuy) Wwlho Viiiies ~0111111~~ Aruruge rilue fnr designuled pul uf 56'YC11 NtIlC Ihu aquifcr. Calculaled by compuler . Five,lfilePrairie 'f 2S a IUb'►mndelJestyirdbyl.V.'I'r2cy,US. Geologicil 5urvey, bnuJ un wlcul9teJ Ilow ralcs and walcrloblc yrudicnls. o O b~ ~ Pi¢as.+nt Piaufn qG ~ p~ ' r p+~ ~ figantis Ave ul N I I N 0 ix / q U Q ~ ~ ~ O u f f~ Q a 2 ~ ~ W IoUeV Ave 1-1.1- a rf I';L1:I1_(Ctl:t l';Lrk ~ s~aK N n ~ Af~'~~ 11 L,h¢ Ntl V~ p~ //~(•~:4'~ti 1111hv0)d W • !n` / ^1' O~ '~~~~~U►\/ W rery~ \ Pdl'kW:1~0f t' ,r~V~• lo p ~ Treni Ave ~ o ~ ' ,..y~ ' ~2.0 j o ! L - ~ CO I Br OwaY Ave u " 0 T 1)ishm;in Wradale i . SOr1QU0 A Q ( Sw acwC Ave 0 I.no p' C > u SOy I'fl~t\hl\fl'NV,1'ftpNAL no m ~~°~s 11NPOR1' V < <y~ ' Yd 29th Avo 7 nd Ave GleIlfOw ~SIT__._. 371n Ave ' ~ ~ n Avo 'd, 1luran 1'r,iirie ~'~NC ~~lLE~ a , , . , . • AQUIFEItTRANSpfISSIVITY DISTRIBUTION . . . , r , > ( . ~ ~ aquifer is at a maximum elevation of about 2,180 feet in northern Idaho and declines to about 1,540 feet in the area north of Spokane. The water table ~ in the northernmost part of the aquifer slopes about 20 feet per mile of length, while the major portion of the aquifer from northern Idaho to the southern edge of the Hillyard trough slopes relatively gently, from two to 10 feet per mile. The average annual elevation of the water table is shown in the figure above. The water table contoursshown on the above referenced figure reflect S the estimated annual average elevation. The water table at a particular loca- tion will vary seasonally with surface water runoff, precipitation and other climatic factors. 4Jater level fluctuations are generally less than 15 feet during a year in most areas. Generally the greatest annual fluctuations occur in those wells nearest to the Spokane River, in response to changing stages . of the river. LJater level fluctuations from a well located in the vicinity • of the project site are shown on the following hydrograph. The depth to the water table is the greatest in northern Idaho, about 300 to 400 feet below the land surface, and becomes gradually shallower downstream, reaching depths of about 120 feet at the Washington-Idaho state line and about 40 feet near Spokane. Continuing downstream the depth to the ~ water table increases to about 150 feet in the Hillyard trough.8 In the vicinity of the project site the deptO to the water table ranges from about 70 to 90 feet below the land surface. b. The Probable Impact of the Proposed Action . • The project site is located near the margin of the aquifer south of Opportunity, where the transmissivity and flow of the aquifer are lower than in the main body of the aquifer to the north. While it is not anticipated that the proposed project will have any perceptible impact on the geology or hydrology of the aquifer, the existing hydrology of the aquifer near the pro- ject site will have a bearing on the potential for water quality degradation ~ from project related effluents. c. Measures to'Mitigate Adverse Impacts . None. d. Unavoidable Adverse Impacts ~ None. • • 64 • ~ 6•later Level Fluctuations in 1-lell 25/44-23D1 , 1931-71 80 , , ► ~ ~ ' • 85 _ 90 95 - , 100 1931 1932 1933 1934 1935 1936 1937 1938 1939 , a 75 80 - . ' ~ 85 - ' ~ 90 ~ N 95 - - ° 100 Z 1940 1941 1942 1943 1944 1945 1946 1947 1948 a 75 3 , • ° 80 - % - W ' ~ ~ 4 m 85 ►`1 - W 90 ~ U- Z 95 • ~ 100 W 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 ~ a 75 O 80 85 , - a ~ 0 90 - 95 - " 100 , 1959 1960 1961'1962 1963 1964 1965 1966 1967 1968 75 80-i ~ - . ~ ' 85 90 - ` . 95 - ' ' - 100 , 1969 1970 1971 1972 1973 1474 1975 1976 1977 ~ Well number: 25/44-2301; Depth: 97 ft.; ' Water use: Irrigation. ~ 65 ~ 3.7 Ground Water Quantity ~ a. Existing Conditions Water Flow The U.S.G.S. has calculated the rate of ground water flow in the aqui- S fer to be 960 and 350 cubic feet per second at the state line and in the Hillyard trough, respectively. Similar rates calculated in the U.S. Army Corps of Engineers Study were 1,000 and 200 cubic feet per second, respective- ly. Recharqe to and Di scharge from the Aqui fer l 0 ~ The aquifer is recharged by percolation of surface water runoff and underflow from adjacent highlands, by percoiation of precipitation, by seepage from the Spokane River, by seepage from lakes which lie adjacent to the aquifer, and by percolation of irrigation water diverted from sur- face water sources. The following figure and table show the locations and • rate of recharge to and discharge from the aquifer as estiVed by the U.S.G.S. using the results from a number of prior studies. In the highlands and hills which lie adjacent to the aquifer, precipi- tation produces small streams which lose most of their water to infiltration as they flow only short distances across the land area above the aquifer. Some surface recharge probably occurs in the area south of the project site • at the sink area where Plouf Creek disappears. Coeur d'Alene, Pend Oreille, Spirit, Twin, Hayden, Hauser, Newman and Liberty Lakes are all adjacent to the aquifer. Part of the water that flows into these lakes is evapor- transpired, diverted, increases storage or becomes surface outflow, and part percolates into the ground and recharges the aquifer. The average inflow to the aquifer from these adjoining areas totals about 1,010 cubic feet per • second, with about 800 cubic feet per second in Idaho and about 210 cubic feet per second in Washington. Direct recharge from precipitation has been calculated to be 130 cfs for ldaho and 50 cfs for Washington. These amounts represent that part of the precipitation which is not lost as surface runoff or as evapotranspiration and is therefore available for recharge to the aquifer. The aquifer receives an average of about 80 cfs from the ` Spokane River between Post Falls, Idaho and Greenacres, Washington. Addi- tional recharge comes from the Spokane River near Post Falls, Idaho where about 100 cfs is diverted from the river and used for irrigation. It is estimated that about one-half of this amount recharges the aquifer. The above estimates give a total of about 1,320 cfs. s The aquifer loses water to the Spokane and Littl'e Spokane Rivers at an average rate of about 1,090 cfs. An additional ground water outflow of about 55 cfs occurs at the downstream end of the aquifer near Nine Mile Falls, LJashington. Water use accounts for most of the remainder of ground water discharge. Approximately 62 cfs of water in Washington and 2 cfs of water in Idaho are pumped from the aquifer and eventually discharged to the ~ Spokane River through municipal sewer systems. In addition, large quantities 66 ! urol,ni,Yai,r ~ ou1llnw ~ ` 5$ tUq LfcEVn ` - a ~ ,W num6en in cubL• !at yn urund -310 Plriw iatu uyuifei Onm uljKdIUny Mm <1~ ~ 41 , ' M{. SpoN.ne iii4 pi t- Raluipc tu Ihe aqui(ci ~ - Dlscliftgc lam tlw oyui(cr ~ raiwwjr ~ 1111' Ntlll' Ibksdur{c (tom ar ietluiye lo 'i \ i4ane aa IAa aqulla IAia~y t4e tipokww onJ ` F`I~'C MiIC Ptalfic Ultle3pukaxkiren ' ' '-I Plea~ant Prairie . +2 lywl~o~na RO , ,•vcn ~1d~ I f I Totul Pumpiny U,.cti , 1; inWtuhinglon +65 • fA ` -120 -124 o +S . NtorFan I e wdum amif aa I II'N IF - I ~ , D I L Fi.nr'n 0.- \ I I p, i~'_~F 0 ~ ~ ` • \ 29p A .9 ' H I I ~ ';i~a ,~I'* k - 3~~ TrentwooA S OLCi11d rn O +80 OiisOrcharJs e . V °qh I ~ y - ' SQO 4~ I J I t Z , I ~ I s I . ~ - ~ F~~~ i3o SP V 0 _ ' p~• ~ ~nt . p UIauwAvnn 9o t 16 SOOW. Ar1 +31"shman ~ 9D = Y o a Spr~wa Ar~ ~ / a Opportunity • +15 Veradalc + 24 • ~ ° ~ ~ 291h Ara I I'recipitalian y, A~~ 3 Lib~y lake SNOi:ANEI\IkNNn71U\AL l:vapotransphation 9o SITE ~ u • ♦ 50 ~ B,orun Praldc N „ o ~ a . o ~ o AQUIFER DISCIIARCEJRCCIIARGf RA'fES 0 N ~Jy a . ~ uui, mu.t ~ SOUkCIs: U.S.C.S. ~ ESTIMATED AVERAGE RATES OF RECHARGE TO AND DISCHARGE FROM THE AQUIFER ~ Cubic Feet Per Second Subtotal Total RECHARGE Flow into aquifer from adjoining areas +12010 ~ Idaho +800 Washington +210 Precipitation minus evapotranspiration on the land surface above the aquifer + 180 Idaho +130 . Wash i ngton + 50 Seepage from Spokane River between Post Falls, Idaho, and Greenacres, Washington + 80 Inflow from surface-water diversion (recharge by water diverted from Spokane River east of Post Falls, Idaho, and applied to land surface above aquifer) + 50 • TOTAL RECHARGE +19,320 DISCHARGE • Seepage to Spokane River - 780 Greenacres to Trent, Washington -330 Trent to Spokane, 4Jashington -230 Spokane to Seven Mile Bridge, Washington -120 Seven-Mile Bridge to Nine-Mile Bridge, Washi ngton -100 ` Seepage to Little Spokane River between Dartford and about 3 miles above its mouth - 310 Total pumping loss in Washington - 127 . Ground water pumped from aquifer and discharged to Spokane River and Peone Creek - 62 Consumptive use of ground water (water ~ pumped from aquifer and removed by evapotranspiration - 65 Total pumping loss in Idaho - 48 Ground water pumped from aquifer and discharged to Spokane River - 2 Consumptive use of ground water (water pumped e from aquifer and removed by evapotranspiration) - 46 Ground water outflow below Nine-Mile Falls - 55 TOTAL DISCHARGE -1,320 CHANGE IN STORAGE 0 ~ Source: United States Geological Survey (1978). 68 4 ~ of water are pumped from the aquifer and applied as irrigation water on the land surface or are discharged to subsurface d$sposal 'systems, after domestic ~ or industrial use, where potentialTy part of the water returns, by infiltra- tion, to the aquifer. Irrigation use of ground water averages about 31 cfs in Washington and 61 cfs in Idaho. Assuming a consumptive-use factor of 0.67, a total of 21 cfs in Washington and 41 cfs in Idaho are lost from the aquifer. 4Jater ~ pumped from the aquifer and discharged to cesspools or drain fields, or used for domestic irrigation, averages about 74 cfs in Washington and 9 cfs in Idaho. Using a consumptive use factor of 0.59, as calculated by Todd (U.S. Army Corps of Engineers, 1976), total loss from the aquifer is about 44 cfs in Washington and 5 cfs in Idaho. These various pumping losses total 127 cfs in Washington and 48 cfs in Idaho, for a total pumping loss of 175 cfs. ~ The above estimates give an average rate of discharge of about 1,320 cfs. This is equal to the estimated average recharge rate. Because no long-term change in storage within the aquifer has been observed within the past 50 years, based on water table fluctuati-ons,it is assumed that a state of near equilibrium exists in the aquifer. ~ Potential Recharqt from Sewaqe Disposal System Drainfields As discussed above, based on U.S.G.S. estimates 74 cfs in Washington and 9 cfs in Idaho is pumped from the aquifer and used for sewage disposal in drainfields or for domestic irrigation. Using a consumptive use factor of .59 ~ as calculated by Todd in the U.S. Army Corps of Engineers study, a total of 30 cfs in Washington and 4 cfs in Idaho would be available for recharge to the aquifer. Of the 30 cfs in Washington, about two-thirds or 20 cfs is the.result of domestic irrigation, leaving about 10 cfs the result of sewage disposal.12 If all of the above where to in fact recharge the aquifer it would constitute approximately three percent of the total volume of water which recharges the a aqui fer. The literature to date continues to show a conflict over the probability of drainfields as an aquifer recharge source. A test drilling program was conducted by J. W. Crosby of Washington State University from 1967 through 1970, to evaluate ground water and pollutant movement from various sources in , the Spokane Ualley. 13 He found the soil to have a low natural moisture con- tent coupled with apparent high moisture tensions. These results led him to suggest that soil moisture was not moving downward to the ground water table. In the final report of the results of the drilling program, Crosby states as a conclusion of the study: 14 Further study of the moisture conditions in the Spokane outwash S gravels has strengthened the earlier conclusion (Crosby, et al 1968) that these deposits are generally in a highly stressed moisture condition. Ground water recharge cannot be demonstrated as occurring in response to precipitation. Instead, it is sug- gested that recharge is associated primarily with marginal streams that discharge onto the outwash plain maintaining saturated condi- a tions in the gravels for extended periods of time. Precipitation is stored in the upper strata and apparently removed during the growing seasons. Dominant moisture movement is probably in response to capillary and thermal gradients. ~ 69 ~ Further on in his conclustions Crosby states: These writers postulate that drainfield waters may. in the early ~ stages of field use percolate to depth. However, as organic matters are formed as described by McMichael and McKee (1966), Buter, et. al. (1954) and Calwell (1938) further deep perco- lation is arrested and moisture movement is predominantly lateral in response to capillary forces. The initial moisture ~ at depth is rapidly dissipated as equilibrium is reestablished with the surrounding media. The investigations of Crosby,et. al., have been criticized on the basis that the samples from the drilling program were only taken during the summer months when the rate of moisture removal by evapotranspiration would be the ~ highest. In addition the Crosby studies reported no significant salt build- up in the soil beneath drainfields, which could suggest that at some time of the year any salt accumulations are flushed downward.15 Crosby attributes the low soil nitrate levels to denitrification a-t depth. The moisture deficit in the soil with a lack of salt buildup appears to be contradictory regarding the ultimate fate of the drainfield effluent. • In 1976, a report on the water resources of the metropolitan Spokane region was completed by the U.S. Army Corps of Engineers.16 This study in- cluded an analytical investigation by Todd of the drainfield percolation mechanism to determine if this effluent could be reaching the ground water. The purpose of the investigation was to determine from calculations of the evapotranspiration mechanism whether moisture is available for percolation • under suburban development conditions after evapotranspiration needs are satisfied. Todd came to the following conclusion based on the results of the study: An analysis of the evapotranspiration mechanism for urban and suburban land use conditions in the Spokane Valley indicates ~ that a significant proportion of the leachate from septic tank drainfields, is available for percolation to the water table of the ground water. The analysis of soil moisture behavior is - based on a conservative interpretation of data and a conserva- tive application of soil moisture transport technology. Not- withstanding the conservative approach, the analytical results s indicate a net surplus of leachate available for percolation to groundwater. A monthly water balance for the Spokane Ualley under generalized suburban conditions (assuming an overall gross density of three residential units per acre) developed for the above study is included in the following table. ~ This water balance indicates that surplus water over and above potential evapotranspiration is available from November through April. The total average annual surplus was estimated to be 14.22 inches, and constitutes 41 percent of the total precipitation plus drainfield effluent. The preliminary results of the ongoing "208" Water Quality Management ` program for the Spokane-Rathdrum Aquifer, being conducted by Spokane County 70 • MONTHLY WATER BALAPJCE DATA FOR SPOKANE UALLEY UNDER GENERALIZED SUBURBAN CONDITIONS J F M A M J J A S 0 N D YR. Precipitation 3.15 2.04 1.10 1.10 1.83 1.44 ,52 ,65 ,91 1.14 2,40 2.52 20.00 Septic Tank Effluent, in. 1.19 1.19 1.19 1,19 1.19 1.19 1,19 1.19 1.19 1.19 1.19 1.19 14.28 Potential Evapotranspira- tion, in. 0 0 0.61 1,71 3,14 4.38 5.61 4.18 3.15 1,61 0,46 0 25,51 Actual Evapo- transpiration, in. 0 0 0.61 1.71 3.14 4.10 3.55 2.85 2.26 1.67 0.46 0 20.35 Moisture Deficit, in. 0 0 0 0 0 0 0.28 2.06 1,93 0.89 0 0 5.16 ~ J Soil Moisture Storage, in. 5.00 5.00 5.00 5.00 4,88 3.41 1.55 0.85 0,69 1,95 5,00 5,00 - Snow Pack Moi sture Storage, in. 3,15 0 0 0 0 0 0 0 0 0 0 0 3e15 Total Percolation, in. 4.34 3.23 2,28 0.58 0 0 0 0 0 0 0.08 3.11 14.22 Source: U.S. Army Corps of Engineers Study ~ in cooperation with the U.S.G.S., U.S. Environmental Protection Agency and the Washington State Department of Ecology, have not provided any defini- • tive conclusions to date regarding potential recharge of the aquifer by drain- field effluents. Preliminary ground water quality data from the Spokane County "208" Study and the U.S.G.S. are conflicting as to the possibility of sewage treatment systems effluent as a source of ground water recharge, and are discussed in more detail in the section on ground water quality below. Secause of the very small quantity of total sewage system effluent compared ~ to the total aquifer flow rate it is likely that effects on the chemical quality of the ground arater would be difficult to identify. Todd used data indicating an increase in total dissolved solids as the ground water flows westward under the areas served by septic tanks as confirmation of his cal- culations showing recharge as probable. The preliminary data from the Spokane County "208" Study and the U.S.G.S. does show a slight increase in salt con- ~ tent of the ground water as it passes under the Spokane Valley. However, a much larger increase in saTt content appears to occur as the aquifer passes under the City of Spokane and the area to the north. Crosby has suggested . that the increase in nitrate and chloride levels as the aquifer flows westerly is due t~ "natural hydrogeological processes and not to seepage from septic tanks". ` Preliminary data also indicates that some areas near the margin of the aquifer have higher salt concentrations than does the main body of the aquifer. Because of the lower flow rates and lack of mixing near the margin the effect of surface recharge on ground water quality may be more easily identified. The higher salt concentrations near the margin may be the result of surface ~ runoff from the adjoining hills or surface recharge from the area above the aqui fer. Water Use Estimated volumes of arater pumped from the aquifer in 1976 by public ~ water supply for domestic, irrigation and industrial purposes are shown on the following figure. These es1t~imates are derived from the U.S.G.S. sumriary of data from previous studies.. Public water supply systems pumped a total of about 30 billion gallons (128 cfs) of water from the aquifer in 1976 for domestic'use. The major part of the water (about 27.5 billion gallons) was pumped in Washington. All ` publicly supplied water used for domestic purposes by the population over- lying the aquifer was obtained from the aquifer, except for a very small por- tion (less than one percent of the total domestic use) which was obtained from Hayden Lake, Idaho. Wells are presently being constructed which will replace this surface water supply with additional withdrawals from the aquifer. The major public water supply systems are listed in the attached table. ~ An additional 22 billion gallons (92 cfs) of water was pumped from the aquifer in 1976 for irrigation'and almost five billion gallons (19 cfs) for industrial uses. Diverted from the Spokane River in 1976 were about 24 billion gallons (100 cfs) for irrigation (near Post Falls, Idaho) and 10 billion gallons (42 cfs) for industrial use (Kaiser-Trentwood • cooling processes). Virtually all the water diverted by Kaiser-Trentwood is returned directly to the river. 72 ~ f~ Sunwery of public water-eupply 9ysteme obtaining vater from thn aquifer water quality ; Lccation Approx- 7lpprox- Num- 3 Present • oF imate imete bar Chemical atandarde vater Namn oP vatez ayateml vells popu- vates uae of SCendasds tiumber treac- lntion Ln 1976 asmplee exceeded of inent served (millions te9ted2 tiroes in 1976 of exceeded gallone) Cicy oE Spokane 25/42-3 180,000 19,800 35 Zron 1 Chlori- 25/43-4,8.11 nation 26/43-31 i• Siodern Electric wacer Compeny 25/44-8,15,16, 25,300 1.760 51 Iron 6 17,21,22, 27 Kanganese - 1 None Dlseolved eolid• 1 Cicy of Coaur d' Aleno 51/5-1,3,12 21,000 1,400 Chlori- naeion Knitworth xacer Diacricc 02 26/43-7,19,20, 14,000 979 13 iron 1 None 30 Fairchild Air ?orce 8nee 25/42-11 14,000 727 61 Zron 1 Chlozi- nation vera Irrigation Diatrict N15 25/44-13,15,22, 12,000 590 37 Iron 2 23,26 Nitraee 2 None • Weahington ►►ater Power 02 25/44-20,27,26, 7,400 590 20 Izon 3 29 Copper 1 Chlori- Lead 1 nat►on wanhington ltater Powrr #►1 25/43-13,23 4,800 343 50 Iron S Chlori- 25/44-7,18 Phenola 1 nation !bd¢1 ir:•igacion Diacrict alA 25/44-21, 28 4,600 82 5 Izon 1 None ' City of Post Falle 50/5-1 4,500 431 None Washingt:,a sidter Puwer M3A 26/43-I9.20, 30 4,.500 273 9 Iron 1 Chlori- netion Orcha:d Avenue Irrigatioo Diacriet =5/43-12 4,500 102 24 /fanqaneae 2 ~ Mb :',!44-7 phenols 1 None Carnhope Irrigation District 07 25/43-23 4,200 206 1 None 0 None Trentwoad Irrigation Diatr:c: 25/44-2,3 3,600 427 8 Iron 1 None 26/44-35 North 5pckane Izriqation DiatriCt 26/43-27,29 2,800 174 S None 0 None p8 • East Spokana ►tater DistrLct pl 25/43-24 2,800 161 22 Iron 5 None Ccnaoli3ated irriyacion Diacrict 25/45-17 2,700 130 2 None 0 None e19 (G[eenacrea) Fiashinqton Wnter Pover *30 26/43-8,10 2.400 202 6 Iron 1 tianganeao 1 None • Ros• Poir+t 1►eaociation 51/5-35,36 2,200 150 None iducchinson Irzigarion Diytz►ct N16 25/44-18 2,000 181 3 None 0 None Conaolidnted Izrigation Diatzict 25/45-18 2,000 100 19 Sron 1 None 419 (Cornin) Paaadenn Park Isrigation Diatrict 25/:4-5,6 2,000 32 2 None 0 None 417 Zrvin Matar Distzfcl #6 25/44-4,9 1.800 406 S None 0 None Tovn of Mullvood 25/44-5,7,8 1,800 36 4 None 0 None Coneolidat@d Irr:qation Dietrict 20/46-31 1,500 72 16 Izcn 2 *19 (eaet FaraS) , Manqaneee 1 None Coneolidated irriyaticn uid:tiet 25/45-2 1,300 65 2 None 0 None ~ 019 (Otis Orchards) Cicy of Rachdrum 52/4-31 1,000 161 Nftrate 2 Nono Pine Villa Eetatoa 50/4-6 1,000 60 None Di3hman ww cer Company 25/44-19 1,000 24 2 None 0 None Coneoladaced Irsiyacion DsstricL 25/45-7 970 43 2 Iron 1 None Mly (Hadt Purm3) hty oi Spirie Lakr- 53/4-6 700 50 None . taat Cseenacreo 51/5-28 600 38 None FLauaar Laku 51/5-19 600 40 None Coa:.ult3aceil 2rraqation uieLricc 25/43-11 S10 25 2 None 0 None • *15 (Carder) City ot Athol 53/3-9 330 50 None Hoffwn 1►ater • ~ 50/4-1 300 20 - None Heyion Pines 51/4-23 25~ 1S None LLLI-rty Lakhe Utilir-ica Co. 25/45-14,15 240 13 17 Iran 2 None Pine View Eatetea 51/4-12 200 13 None Norn,b Trailer Caurt 51/4-23 150 10 None H,~,nb Irrlgatian District M20 26/45-25 140 7 4 Sron 1 None Fanhandle Mobile ErGatee 52/4-22 125 8 None !lwntain Viev 51/4-14 125 B None Sun Air Mobile 51/4-11 100 7 None • Counery Livfnq 52/4-27 100 7 None Heu:ter 50/4-0 100 7 None Rivilla tratez Corporation 26/43-6 97 6 4 None 0 None Nrn+ard titater 52/4-5 50 2 None Bunco Rnad itater 53/2-17 40 2 None P1eASant Prairie +tater Company 26/44-32 34 5 2 Nitrate 1 None Pinecroft Mobilc Home Park 25/44-9 Chlori- nation Nidden Villaqe Estatee 52/4-22 None Uppcr T+fn Lakes 53/5-36 None r'.nerald Estates 51/4-12 SUbdiviaion not yet completed None . • • Carnvelle Corporation 51/4-21 SUbdiviaion not yet corepleted t1cnc 1 A few additionel small systeme pzobably exint ttiat are not irtcluded in the basic daca• ZData not available for 2daho. 3 Chemical atandeTrda are explained on plate 10. ' ~ 73 ~ b. The Probable Impact of the Proposed Action ~ Assuming an annual use of 35,000 cubic feet per residential unit, the proposed project would result in the withdrawal of about 14.9 million cubic feet (.5 cfs) of water annually from the aquifer for domestic, sewage disposal and irrigation purposes. Of this total approximately 6.2 million cubic feet per year (.2 cfs) would be used for sewaoe disposal and ultimately discharged to a drainfield above the aquifer. The later total was derived assuming 3.2 ~ persons per residential unit at a consumption rate of 300 gallons per day per residential unit for sewage disposal. The anticipated water consumption by this project represents a very small percentage of the total flow from the aquifer and poses no threat to existing supplies. The present ground water flow is capable of serving • more than double the population now being served. A portion of the above water consumption may be available for recharge to the ground water system. Using a consumptive use factor of .59, as developed by Todd, 41 percent of the total water consumed would be available for percolation into the ground water system. This would represent a total ~ of 6.1 million cubic feet per year (.2 cfs), of which 2.5 million cubic feet per year (.08 cfs) would be from sewage disposal systems. If this entire amount of water were to percolate into the ground water it would represent less than one-tenth of one percent of the total flow of the aquifer. It is not anticipated, based on the above, that the proposed project ~ will have any perceptible effect on the quantity of ground water. The pos- sibility of ground water quality degradation as the result of percolation of searage treatment system effluent is discussed in the sections on ground water quality and sewage treatment. c. Measures to Mitigate Adverse Impacts ~ None. d. Unavoidable Adverse Impacts None. ~ • ~ 74 ~ ~ 3.8 Ground Water Qual ity • a. Existing Conditions Pursuant to section 1424(e) of tlie Safe Orinking 4Vater Act 19 the Federal Environmental ProtectTOn Agency (EPA) has designated the Spokane- Rathdrum aquifer as the sole or principal source of drinking water for approximately 338,000 people in a portion of northern Idaho and eastern Washington. The designated "sole source" area includes the aquifer recharge ~ and streamflow areas shown above. The sole source designation.Mr the aquifer was based upon the following determinations by the EPA. 1. The Spokane Val 1 ey-Rathdrum Prai ri e Aqrui fer i s the "sole source" of high qual ity drinking water for over 338,000 people including cities and towns and people r using individual wells. Current water supply treatment practice is limited to minimal disinfection for some systems and no treatment for other systems for drinking purposes, and there is no alternative source of drinking water supply which could economi-cally replace the Spokane Valley-Rathdrum PrairTe AquTfer. • 2. The Aquifer is vulnerable to contamination through its recharge ione primarily because the glaciated soils which are highly permeable. There is evTdence of lo- calized contamination from industrial sources and septic tanks. Since contamination of a ground water aquifer can be difficult or impossible to reverse, contaminatYOn • of the Spokane Valley-Rathdrum Prairie Aquifer could pose a significant hazard to those people dependent on the aquifer for drinking purposes. The sole sou rce designation will require projects which receiv e Federal financial assistance and have a potential for pollutTng the aquifer be ~ subject to a special EPA pre-construction review. The basis for the review is whether or not the risk of contamination of the aquifer created by the proposed2Froject is sufficient to create a"significant hazard to public health". Water Qualit,y Standards • Federal standards for drinking water quality have been established by the EPA. The following table shows the maximum allowable contaminant level (primary stqndard) and the proposed secondary standard for each po- tential water quality contaminant. The primary standard establishes the maximum allowable contaminant level for chemical constituents of drinking ~ water which may affect the health of consumers. The secondary standards are only guidelines and deal with the aesthetic quaiities of drinking water. The inorganic constituent of primary concern in the aquifer is nitrates. Excessive concentrations of nitrate in drinking water produce a bitter taste and may cause physiological distress. The nitrate ion has also been ~ implicated in the occurrence of m~themglobinemia (i.e., "Blu e Baby" syndrome). Heavy metal such as lead, copper, mercury and cadmium can be toxic in excessive concentrations. ~ 75 WATER QUALITY STANDARDS ~ Chemical Standards Maximum Proposed Constituent Contaminant Seconda~y Level' Level Iron 0.3 mg/L ~ Manganese 0.05 mg/L Sulfate 250 mg/L Chloride 250 mg/L Fluoride 2.0 mg/L ~ Nitrate 10. mg/L Total dissolved solids 500 mg/L pH <6.5 or >8.5 Color 15 platinum r cobal t units Turbidity 1 to 5 JTU Foaming Agents (detergents) 0.5 mg/L Arsenic 0.05 mg/L ~ Barium 1. mg/L Cadmium 0.010 mg/L Chromium 0.05 mg/L Copper 1 mg/L ~ Lead 0.05 mg/L Mercury 0.002 mg/L Selenium 0.01 mg/L Silver 0.05 mg/L ~ Zinc 5 mg/L Endrin 0.0002 mg/L Lindane 0.004 mg/L Toxaphene 0.005 mg/L ~ Phenols3 0.001 mg/L 1 National Interim Primary Drinking 4Jater Regulations (U.S. Environmental Pro- tection Agency, 1975). Primary regulations are those which deal with constituents ~ that may affect the health of consumers. ZPlational Proposed Secondary Water Regulations (U.S. Environmental Protection Agency, 1977). Secondary regulations are those which deal with the esthetic qualities of drinking water. These are guidelines only. 3Chemicai standards for phenols are not included in the primary or secondary regulations. Because of the frequent use of phenol by industries situated above ~ the aquifer, the available phenol data is included and referenced to the Public Health Service (1962) recommended limit of 0.001 mg/L. Source: United States Geological Survey. 76 ~ ~ Ph.ysical and Inorqanic Chemical Characteristics . The avai 1 abl e water qual i-ty data i ndi cate that the aqu i fer general 1y yi-elds water of excel 1 ent qual i ty. A surrmary of the chemical qual i ty of the water from the aquifer i•s included i'n the f ollowing table. Only those constituents for which a federal primary or secondary standard have been established are included in the table. This table represents a summary of about 9,600 analyses from 400 ground water sites located throughout the aquifer. • (1) Contaminant Levels i-n Excess of Drfnkinq Water Standards The maximum contaminant level of five of the eleven characteristics for which a primary water quality standard has been established (those that may affect the health of consumers) have 6een exceeded in a small number of • sampl es from the aqui fer. The maximum contami nant 1 evel of barium, cadmi um, mercury, seleniun, chromium and silver were never exceeded. Flouride, nitrate, turbidity, arseni,c and lead maximum contaminant levels were exceeded in a total of 16 analyses, which constitutes less than one-half of one percent of the analyses for these constituents. • The recommended levels of 8 of the 10 characteristics included in the proposed secondary levels, which deal wi'th those characteristics that may affect the aesthetic quality of water, have been exceeded in a small number of samples from the aquifer. The recommended levels of sulfate and foaming agents (detergents) were never exceeded. The recorrenended levels of manganese, chloride, total dissolved solids, pH, color, copper, and zinc were exceeded ~ in less than two percent of the samples. Iron exceeded the recammended level in almost eight percent of the samples tested. Proposed secondary levels were exceeded a total of 87 times (1.4 percent), from a total of more than 6,300 tests. The following table lists the ground water sites where the primary or ~ proposed secondary drinking water standards have been exceeded. Five of the sites where drinking water standards have 6een exceeded are located in the general vicinity of the proposed project site, as shown in the following figure. At site 25/44-26L1 (Vera No. 4), which is located 112 mile north and 1-112 mile east of the project site, the standard for nitrate, flouride and manganese were each exceeded once. At site 25/44-29A1, Washington Water ~ Power Pdo. 2-4, which is located about one mile north and 1-112 miles west of the project site, the standard fo r copper and lead were each exceeded once and the standard for iron was exceeded twice. At three other sites (25/44-27E19 -27L1 and -28L1), located within about 1-1/2 mile of the project site the standard for iron was exceeded a totai of three times. The iron standard is a proposed secondary standard set to deal with those ~ characteristics which may affect the aesthetic quality of water. As dis- cussed above, iron in high concentrations in drinking water has a tendency to discolor the water and cause a staining of porcelain. Occasional vio- lations of the iron standard occur throughout the aquifer and the magnitude and frequency of violation in the vicinity of the project site are not unusual. • ~ 77 ~ Summary of ground-water-quality data • Chemical standards Number Number Maximum Proposed Number Number Maximum 1 of of contam- secondasy of sites of value Constituent sites sample3 inant2 level exceeding samples observed . tested tested level (EPA chemical exceedinq , • (EPA 1977) standard chemical 1975) • standard Iron 212 758 0.3 mq/Y. 40 58 78 mg/Y. • Manganese 200 700 0.05 mg/L 12 12 1.6 mg/L Sulfate 168 596 250 mg/L 0 0 210 mg/L • Chloride 364 11115 250 mg/L 1 4 >1,000 mg/L Fluoride4 210 706 2.0 mg/L 2 2 3.2 mg/L Nitrate 247 940 10. mg/L 6 11 28 mg/L Total dissolved solids 364 1,087 500 mg/L 3 3 539 mg/L pH 229 918 <6.5 or >8.5 3 3 Range ~ 6.2 to 9.4 Color 128 484 15 platinum 5 5 21 units cobalt units Turbiditys 139 462 1 to 5 JTU 1 1 10 JTU Foaming Agents - ~ (deteryents) 25 77 0.5 mg/L 0 0 0.1 mg/L Arsenic 89 185 0.05 mg/L 1 1 0.064 mg/L Barium 3 3 1. mg/Y, 0 0 0.070 mg/L Cadmium 112 336 0.010 mg/L 0 0 0.006 mg/L Chromium 93 186 0.05 mg/L 0 0 0.03 mg/L . Copper 97 210 1 mg/L 1 1 5.2 mg/L Lead 110 235 0.05 mg/L 1 1 0.42 mg/L Mercury 99 196 0.002 mg/Y, 0 0 0.0002 mg/L Selenium 3 3 0.01 mg/L 0 0 <0.010 mg/L Silver 3 3 0.05 mg/~. 0 0 <0.005 mg/L • Zinc 97 395 5 mg/Y, 1 1 7.5 mg/L Endrinb 17 17 0.0002 mg/L 0 0 <0.002 mg/L Lindane 17 17 0.004 mg/L 0 0 <0.001 mg/L Toxaphene6 17 17 0.005 mg/L 1 " 1 0.060 mg/L Phenols7 24 77 0.00 mg/L 16 18 15 mg/L • Source: U.S.G.S. ~ 78 • ~ • liecords of lxations where conatituents in ground-vater eamptea have excoQddd cTemical etandarde Constituen[ Site Date Site Date Site Oate nwnber sampled Value nurnbQr eamplad Value number eampled Value Zzon 25/42-llKl 11-22-65 0.58 mg/L 25/43-15E2 5-12-70 1.1 mg/L 26/45-24P1 4-29-64 1.1 mg/L 25/43-23A1 5-07-70 .43 12-14-71 .32 -24P2 10-27-61 1.2 12-11-71 .32 -171t1 7-02-75 .40 4-29-64 .61 0 1-18-72 .44 -27E1 7-17-72 .48 -25C1 5-07-75 .35 7-24-72 .70 ~-27L1 5-11-70 1.4 -34L1 4•27-71 1.0 9-14•72 .70 -28L1 5-10-71 .34 -36N1 6-28-71 2.0 -24G1 5-13-70 .62 -29A1 2-14-72 .42 9•}6-73 .56 12-31-71 .34 3-31-72 .36 13-18-73 1.5 6-12-72 .36 25/45-7P_3 4-27-71 .90 26/46-31M1 5-14-70 .42 -24L1 2-14-72 .38 -1`01 12•13-71 .34 12-14-71 .00 3-31-72 .46 -15R1 2-14-12 .34 50/4-31U►D1 6-23•76 76 25/04-381 10-09-75 .3B 8-14-72 .32 50/5-43BA1 3-16-76 6.8 -8N1 5-12-70 .48 -16R1 7-24-72 .68 4-29-76 .79 • -9J2 4-16-71 .38 26/42-12L1 5-12•64 .32 6-14-76 16 -11R 4-16-71 2.0 5-15-75 .32 51/5-29G►A1 5- -76 .60 -12A1 5-01-75 .31 26/43-601S 10-1d-72 .46 6- -76 .50 -12D 5-01-75 .32 -603S 10-18-72 .34 -31DDC1 6-23-76 3.6 -13M1 5-15-70 .44 -19A1 7-09-75 .34 -33BCD1 5-25-76 1.3 -15E1 2-16-72 .32 -30P1 9-30-70 .80 53/2-38AC1 10- •76 .70 -31A1 5-28-75 .31 ltiinqnnaee 25/02-13H1 3•20-74 0.14 mq/L 25/00-7C1 5-14-70 u.052 cag/L 26/43-884 5-12-64 0.46 aq/L 25/43-12H1 6-19-72 .30 -15E1 7-02-75 .060 26/06-31M1 5-14-70 .060 25/44-1J1 11-05-75 1.6 •26L1 5-22-72 .060 50/4-3MD1 6-23-76 1.4 • -6A1 10-10-72 .052 26/42-12L1 5-15-75 .060 54/2-34 5-09-74 .21 ChloridQ 26/43-34P1 5-24-55 370 mq/L 5-25-55 470 • 6-13-55 700 6-24-55 >1,000 Pluoride 25/54-26L1 12-13-71 1.7 mq/L 52/4-2CDC 1-07-74 3.2 mg/L Ltitrate 25/44-26L1 11-04-70 16 ag/L 52/4-31CA81 7- -75 26 mq/L 54/2-34CAC1 10- -75 14 mq/L • (a• N) 2-14-72 11 52/5-25DCD1 7- •75 28 3- -76 12 , 26/44-3201 9-27-71 11 54/2-34CAC1 8- -75 23 8- -76 11 51/4-3588J►1 10- -76 11 10- •76 20 ?otal 25/44-201 6-10-74 537 :ng/L 25/44-17A1 G-06-74 539 mg/L 53/4-270AC1 C- -75 508 mq/L diasolvad solida pH 25/43-24(il 5-13-70 8.8 unita 25/45-14Nl 10-22-59 9.4 unite 26/43-20J2 12-26-62 9.0 units Coloci 25/44-4Jl 5-04-71 21 PCL1 25/44-8D1 4-19-71 17 PCV 26144-32R1 S-OS-71 20 PN • SFtl 5•14-71 20 -1BJ1 5-10-71 16 Turbidity2 26/43-601S 1-17-73 10 JTU Arsenic 26/43-7B1S 9-26-73 0.064 mg/T. Copper 25/44-29A1 9-14-72 5.2 mg/L Laad 25/44-24A1 9-14-72 0.42 mg/L Zinc 52/4-17AHC1 B- -75 7.5 mq/L • Toxaphene 26/42-12A1S 9-26-73 0.060 mq/L Phenola t;,'33-14Kl 6-27-73 0.002 mg/t. 25/44-19D1 5-26-73 0.002 rsrq/L 26/42-27N1 6-29-73 0.012 mq/I. 25/44-1J1 11-17-75 15 25/45-4C3 6-06-74 .002 26/43-SL1S 6-29-73 .002 -2Q1 6-27-73 .007 -15G1 •1-25-73 .004 -7813 6-29-73 .004 • 6-10-74 .002 26/02-11.ll;; b-27-73 .005 -16P 6-10-74 .002 -7C1 9-25-73 .002 -12►1S 6-29-73 .003 26/45-35P1 6-28-73 .004 -16D2 6-27-73 .002 9-26-73 .004 -36p1 9-26-73 .002 1 PN = platinum-cobalt unit9 • 2 JTtJ - Jackaon turbidity unitB • Source: U.S.G.S. 0 79 u'I'LI.I51.11 AVl NOg 1 - - -F@`~ i µt,w,ur \M n ~CL~R~~ 49 ~~'~tE~~Twr~ou ~ I NI µ'U1% l.AKl' ItO"D ~ F E w _ 50 , s ~ Rivr: CLR M n ~ _Z ~ 48 TDS PN f 1, p~,D PN ~r i ~ . ~ 51 , PN ~ Rfie Fe Fe , IIPNIVI'it! 52 ' N ' 53 ' e so Fe o ~ y 'IRtNTnvh.,' PN 47 ~ r cc a ~ PN < & + -'o' ~iwAY e~~r. Gj;q I r u ~ ~ SPO AN~ ' p CLR ` Fe Fe $pPAC,II£~VF; 2-NAfITn1'I SPNnf,UCAVt. ~ ~ I O i I F@ UISIINIAt~ OPPOR'I'Uf~ITI' VI:HAflaLli o i ~ Fe ~ O Y t y 'a Fe pN I 1' • r.. ~ % III~I,NI) Ihh A+r 5~ J111(A1'NNJIL'Iy11JIllyllll' y ! C ; L •y Fe O o ynl bKmw,a numGOr 111htivc I c C ~G 1[Kdliniuulmcwnundwalri y ~ F~ qu+lif) turc,indrl,Ecmiial C ~ ~ ~ m re ' ~ W~iula~A~alle~flW1~Y W M4.n N Ve ~ lum i I• ~ u , F . 11m?Iinpn~,~u GLL:NROSL F~ A F ~1.~~~1~,uo,~. ,yihAYC •HWlflde 71qArc Np 3 3 o q IDSIwaIAuHJrcJaululs i GItOUlVD N',4TL'R OUALITY Sl'ANI7ANI)S ///SI'I'G//' t o i'i.kca i ~ VIOLA'I'ION SI'fI:S ; lu•a, rpcf i cia I W ~ ~ ~ PN•V'hen~J~ -.J ~ asinave 440inw~ ~ 1 Flik , . JCALI: SQUnIlr JP 4~:. U.S l~ S. • • • . • . • • ~ / . ` Of the remainTng violations of drinking water standards that have occurred in the vi•ci~nity of the project site, several are suspected to be the result of analyti-cal error or contaminati-on of the sample. Because ~ of the large num6er of analyses and because tlie data were obtained from a wide vari,ety of sources representYng di1ferent sampling techniques, analytical methods and data reportTng practices, the possibility exists that inaccurate data is included i-n the tabulations included above and elsewhere in this report. The USGS has specifically indicated in its recent report on the aquifer that the vTOlation of the flouride standard reported • at site 25/44-26L1 (Vera No. 4) and the high lead and copper concentrations reported at si te 25/44-29A1 (WWP 2-4 ~gay 6e i naccurate due to analyti cal error or contamination of the sanple. While not mentioned by the USGS the reported nitrate level in excess of the standard at site 25/44-26L1 (Vera PJo. 4) also appears suspect. This well was tested for nitrate 17 times between 1970 and 1974. Of these tests, 15 showed vaTues of nitrate • of 2.9 mg/1 or less, one showed 3.7 mg/1 and one showed 11 mg/1 exceeding the maximum contaminant level of 10 mg/l. Qecause it is incompatable with the remaining data, the extreme value may represent analytical error or contamination of the sample. (2) Hi storical Water Qual fty Trends • A tabulation of data from 11 ground water sites located in the general vicinity of the project si'te are i,ncluded in Appendix B to this report. This tabulation includes all availa6le data on the chemical quality of the water from these sites. Sample results from the Spokane County "208" Water Quality Management Program through Fe6ruary of 1978 are included as ~ is data through December 1977 from the on-going USGS sampling program. Detailed comparison of this data from one time to another may be misleading because of changes in sampli,ng and analytical methods over the years have qenerally improved the accuracy of the result. Data reported prior to 1970 is of less value than that reported subsequent. The data considered most reliable are the "208" study results reported by the laboratory at ~ Washington State University and the results of the on-going USGS monitoring program. The "208" study reported "field data" is less reliable because it is generally the result of less accurate and reliable analytical methods. In its interim report the "208" study reports significant deviations betareen nitrate levels in duplicate samples run at 4dashington State University and the field results reported by Spokane County. ~ The available water quality data show that while the concentration of any one chemical constituent may vary from sample to sample at a particular site, no long term trends of changing water quality are apparent. A listing of historical nitrate levels from selected wells near the project site from about 1950 to present are shown in the following table. No trend of changing ~ nitrate levels is apparent from this data. A siNlar conclusion was reached by the USGS in its recent report on the aquife r. (3) Water Qual ity Variations !Ji thin the Aquifer In general there is little chanqe in the quality of the ground water ~ from sampl i ng poi nts near the ti-tashington-Idaho S 24 e 1 ine to the outl et springs north of Spokane except for salt content. The available data indi- cates that there is a moderate increase insalts content in the aquifer as • 81 ~ Historical Nitrate Levels From Sel'ected 6,fells Near Project Site To tal NTtrate, mg/1 Well Site 1938/521 1971-722 19773 ~ WWP 2-4 2.6 2.7 Modern No. 9 1.9 2.5 Uera No. 4 _ 2.8 2.6 WWP 1-4 5.2 ~ riodern No. 1 . 2.4 1.0 .9 Vera PJo. 1 1.5 1.3 1 Weigle and Mundorff 2DSHS ~ 3208 Fiel d data corrected. 6y '.75. . - i t passes from the State 1 i ne through the Spokane area. The fo11 owi ng tabl e shows a generally Tncreasi,ng concentration of salts at selected cross-sections ~ of the aquifer progressing from east to west. Conductivity, nitrate and chloride concentrations for the various cross-sections of the aquifer based on data f rom the on-going USGS study are shown on the following figure. This data shows a very slight increase in salt content as the aquifer passes under the Spokane Valley from State line to about Opportunity. Over this section nitrate levels increased from .9 mg/1 to 1.2 mg/1 while con- ductivity (a general indicator of dissolved solids) increased from 281 to 292 micromhos. From the area near Opportunity to the east city limits of Spokane the quality of the ground water, in terms of salt content, improves somewhat. Over this section conductivity, chloride and sulfate levels all decreased slightly while nitrate levels renlained about constant. The interim ~ report of the "208" l-later Quality Management Progra m indicates that this improvement in ground water quality near the east city limits of Spokane may be due to influence from the Spokane River which di scharges to the ground . water along the Upriver Dam backwater area.25 The most substantial increase in salt content occurs between the cross-section at Pa rkwater and the one . at the north city limits of Spokane. Over this section conductivity, nitrate ~ chloride and sulfate concentrations all shovr an increase. Nitrate concen- trations increase from 1.2 to 2.6 mg/1 and chloride levels go to 4.4 from 2.1 mg/1. The ground water quality data from the on-going USGS study of the aquifer used to show the variation in ground water quality at selected cross-sections of the aquifer is included in detail in Appendix B to this report. A similar ~ analysis which has been made by the "208" Water Quality P9anagement Program using "208" field data results, which generally confirm the observations made above, is also included in Appendix B. The source of the increase in salt concentrations as the aquifer passes through the Spokane area is undetermined at this tim e. Crosby has noted that • some increase in dissolved solids concentrations could be expected due to 82 • Variation in Ground Water Quality at Various Aquifer Cross Sections Contaminant State Line Otis Orchards Opportunity Parkwater North City Limit Conductivity, micromhos 281 255 292 257 360 Hardness, mg/1 as CaC03 148 143 155 141 204 Chloride, mg/1 .92 .99 2.1 1,6 4.4 Nitrate, mg/1 .93 1,04 1.2 1.2 2.6 Sulfate, °o mg/1 11.8 12.2 12.5 12.4 20.9 ' Approximate distance from State line, in miles 0 4.0 8.0 11.0 17.0 Source: U.S.G.S. monitoring data, 5/11 through 12/77. ` ~ ~ • 39! , 1 0 • MI. Strokone p+i w M ~ 4^ ~ Park Way 2}~ 1Nine Milc \1caJ vwne Na / .93 .93 • Fivc Mi1c Prairic ~ Ylewitinl Prniric ~ • i i+m~nme aa / 36{) Scvcn A1ilt I ~ I 4.4 ' 'b ( 2.6 292 2.1 ?55 J + i., i'ua , MOfgi10 ACll'S -`~~J~cflp DIN nl DuMN RO ~ D FanclAve\ L i_ ' A L r~ L. o•~-~ ~'.S7 :70 i' . 1.6 ' H ~ ( I,? Pasadci a P:ul -I'renlwouJ I I . Q. V0 O \ 'rv' O C~c'~Il~ ~ uodw 41is lreharcls \tillwoo O ~C e Va I ~ 5~0 I . p Igo 1\' ~ ~ ° . FkL'ItiFIfI.D .p 1 ~`-I• ~ ~ ~ ~ 0° 8r0a6w~Y Aue 7~en1 c c ~ SarA9u Are o ~)Iti~llll:l~l I I SaARU. Aia ~ n ~Q _ u, Q a 1 a • j I } x Uppnrlunity ti LLI ~ ~ ~,,J o \ ( e Vtrad.Jc • . I a ~ Liberty L~ke in 72na \A.. ~ • L C~ll`11fO5L' ' SMiKn~'F'I~IkNN~TIUNAL :9 I a~ ~ g~pC n , ( AIHYORfI VA111A7'ION IN CROUNU WA'I'EN QUALI`fY AT VARIUUS AQUIFEIi CROSS-SECI'IONS ~o Nluran Priirie N t~ LF:I.I NO c° eo , 145 Comfvcuvuy ~ i 2.2 (:dlwiJe g . r U LI Vltralc AqWfct L'iuss3n:uon h - a „ianlA.i.\IU r ru. ...n..~ .n.r. ~a ~aNr:aiu.el SOURCE: U.S.C.S. I1am, 5177•12J77 ` ~ ~ ~ • • • • • • • • • • ~ • s • • • • • • \ ~ . ~ ]~5 ~ a G►srnn . 1 I.SpoLim Ibvn ut Ninc Milc FAs 2 L IIHtnGle Slaln Nitl ' MI. SpoAano VdrM Or J. f,nffuA SprliVA ~ 9 ~ 4. Whiiuwlh d 3 O S. IILilxnrlA SA • P+iM 6,Ih'ImwntiM1 IcN Nine Mile / 7. w;j►i$J sNtin~ NIl'Jtt ho- Ro H. NM1I'V 33 Fre D1ik Prmrie 4 Ple3sant Proiric 9 Wuodermsm Spri~r ~ • •~i -5 J 10. 208 IJaIw•9'ceni ~+ewino~m i~o 11. Mwh W.D. I ~ . S~wen ~1ile ' iz 208 ia+d~~ ucr~ ' u.rn) in i4.ui5llo r.7u 10 ~ I ;~1 r • is.ciuii Il ~ DiOfgaO Al'fl'S ~~o„" o I~ i~.ciuy 12 ~ ~ Pluf~nt K~1~I~ QO 1 D . ~ , v„~u~A~. j E , _ _ 14 A P;sadrna Pyk TrentwonA ~ a5 H \~7 ok-aint4 I Y J ! uvna`D' ~ t a' C1O,J~1J Q I ~ I O Oiis Qrchards E ~~p~1~ 00 y~14kg hliliwpo SV Ft:Lrsr•u:LO Sp e VaI 16 U a p~ tl~aawlv Aro ~ 70 THOI ` ro , 50r.qur0.w p ~~IShlll:lll I I SW~OUeAr~ I ~ /'r 90 ~ ~ . Q • . ` 4 I r a Opporlunily t ~ ~ ~ ' P' \ I q a VCtadale • o ~ o Liberly laka o , \vo 3 tm SYOKANI, IM'IiftNA I'IUNAI. AIRPoNI'I ~D I ry~0.~~ y ~ i j ~ L'~•~ ~.~.I o Mornn Pnirie ` N Q.9 "208° HicLo D,aT.a ~ ~ ~s~ • AVGRACE"1'U`I:AI., NI'I'I{A'fl?, mb/l jr g ~ (lune I977 - Uecember 1977) ~ natural geologic and hydrologiic mechanisms. This would include the possi- bility that some salts may 6e di,ssolved from the soil materials that the aquifer passes through. This explanation is supported 6y the lack of any ~ long term trends in water quality noted a6ove. Surface recharge from the hills adjoining the aquifer or from the area above the aquifer is another possible explanation. A review of the data Tncluded in ttiis repo rt indicates that a variation in water quality exists in the area south of Opportuni-ty and in the general vicinity of the project site in compari'son to tlie main body of the aquifer • to the north. This area ts located on the south margin of the aquifer where, as indicated above, the transmissivTty and flow of the aquifer is apparently lower than fn the maYn 6ody of the aquifer. Data from three ground water sites 1n thts area (*25/44-261.1 (Vera No. 4), 25/44-27E1 (Modern PJoo 9), and 25/44-29A1 (WWP 2-4)} which provide the most complete and long term water quality records in t}ie area show higher chloride and ~ nitrate salt concentrations than the main body of the aquifer. These ground water sites also show IiTgher conductYVfties (an indicator of salt concen- tration) than do sites to the north. The following two figunes show the somewhat higher nitrate levels found in the general area of the project site conpared to the area to the north. This observation is noted in the Spokane County "208" Program interim report 26 and is confirm~ by the • preliminary data from the on-going USGS study of the aquifer. There is insufficient information at this time to establish the reason for this variation. Similar areas of high salt concentratI~ns have been noted in other areas 1 ocated on the margi n of the aqu i fer. It i s suggested i n the "208" Frogram interim report that this variation may be due to a combination of ground water recharge from sources above or adjacent to the ~ aquifer in these areas and the lack of mixing due to lower aquifer flow rates near the aquifer margin. The USGS and the Spokane County "208" lJaste Water P9anagement Program in their on-going monitoring program have collected and analyzed a large number of ground water sampl es from depth sel ecti ve wel 1 s. These arel l s ~ allow the collection of ground water samples at various levels below the surface and provi-de data on the variability of ground water quality with depth. USGS data from 13 depth selective wells are included in Appendix B dnd includes the results of samples collected from May through December of 1977. Results of the Spokane County "208" depth selective data are in- cluded in its Interim report and are not reported here. The "208" field ~ data covers the same ground water sites and time period as the U9GS sampl i ng but i s considered 1 ess rel i abl e as i t i s the resul t of 1 ess accurate and reliable analytical techniques. The location of the depth selective ground water monitoring sites are shown on the following figure. The resul ts of the depth sel ective sampl i ng over thi s time period ~ indicate that the ground water generally is of unifom. quality over depth. Of the 13 monitoring sites only ttivo showed any indication of stratifica- tion of contaminants. The most clear cut exception occurred at site 25/44- 17R1 (Qalfour Park). At this site depth selective samplings were made by the USGS on four separate occasions. The results are shown on the following tabl e. The sampl es col l ected on October 1 0, 1977 indicated defini te strati- ~ fication of salt content. Chloride concentrations were found to vary f rom 86 • ~ • • • ~ • ~ • s • ~ `5.. ~ ~'.Ili~ ~ I ` ,`n• H1111~I11 ~\I ~ %kI vuiwuuIM i TItI:nTll'OOU _ I ~I ~1t1~~ 1 ~KI NO.aI~ ' I= I I: L ItlVlilt i I~ J:] - - s ~ l'ily 1111,1.1V'UOI) ^ ~ IwIiJArr < ` I i ~ 1V1 C J , J I'I'Hlll It i 'I HI N'I VI z s 44 c,t~ ~ J .y t z I a j IlNI1,lIIN'A1' A5'1 Spo AN' ~ 1.6 O.~~ o 1.3 c 1.1 ~ bI'Nm.II r\11 I 51'I41 AGI'f AVI ~ SVNdCX1 AL'1- co nisnMAn oPPaKruNiri' . VEkADAI.k I ' ~ z I : 'c ~ i I ~ C 2.7 j 0 2.5 ? ~ I1tnA,e I r oc s . I L s ~ ^ O e o ~ = IE ~ c a z LEGENp s V N'dl Silm - ~ 2911, Aru GLGNRUSL J:nJ ,\re O 2•6 n•wWNta U•M.dmnNu9 I lls ero "2U6"fll'•LUpAT:1 l'•1'etA Na.a iiiir i~~/ • ' uw Pu\ i AVGRACI: TOTAL NITRATE, mgJl •ii; ••~~ii D 10t1 U2If n ~ii.SITE•ii k•hlmlernNn,I I ~ (Junc 1977 • Decembcr 1977) r•YacNuI ~ ; G•VeraNo.2 I ~ / \ -j If • I08 VIOCY MuSWG PYA I ~ v I• I:tn~l 14rMn a4tndu,~ N , 3dlivanRd. -'-•-v--'J \ ~ II ISidc ~Jih~~r 1•N'N'PI-I NOTE: FIELD Dd I'A CURRf.CI f D Bl' .1S fACfOR JI:nLF. ~ a ....nw.,,,..,~n.n. ~i....< SOURCIi: Spolnne Caunly "206" Program - ' M1nFt r WII.LI:SI.11'Al'E I V'JJICy 5~ ~ ~ . ~ ,Vµ%Vfµ UPNIVFN DHIVI: .I,RGN"fN'Upl1 N . 29 ~ I'E NI.Y711AhLAF:k:R(lAP , It1VFR 5 City Euc6il Are At11.1,1v00u o i ~ ROA» 0 I I LP~4 ~ J- P`y ~tiH~1P~ a i 3 D UPHIVI'P ^ o ~ ruevravfle ~M~~ 0 s ~ U r w a G 94 I.0(III W ~ j BNUAUWAY AYF; u SPOJCAN~ qo ` Oj isiii SPkACUL AVE ~ S7NAGl:EA VF. 5PNAGIlk: AVE ~ ~ c0 00 oistiNInn , i UPPOIt'I'UN1TY VGRADALE < I O y ~ x z • } a 1?IAA%e ; 2.511) ~ 2.6(13) ~ ~ o 7 i.rci;r+n limnle ~ w L9114i rc wcnsii~ y m O ~ ~t•h'WPN ° 5 u.Mt.~d No,i W IE ~ m/-N 3.4 (I I ~ c•M,.M M..l ~ I'3 yl U- Mwkl Na 2 < a, \J 2.8(14) e•~n~~~~ t 2 w V 3.3111 4.311) } ~ Q F-1lidcinN4.9 ol I ` cLcNkasE • 2vm~~~ r,•v.~~No. a 4 (9 32nd Aw II • plidcra N'~. I I lic~n~ D58SDATA i•vau No.i ~ •iiiiiiiii. I a AVEItAGETOTALNITRATE,mgJl SIT'EI„ s o Numhe ulti;unpfu I 0 (August 1971 •Seplember 1972) w AvrnbYTolilNtlnle,~u q z ~ E (Augmi 1471 •M:piembei 1972) . I L~ > ~ J ~ W ~ \ y SOURCE: U.S.H.S. 441h Ave ^ I ~Itk Nih Are ~ h . SCALF: ~ QI . i..Y . • . • • • • • ~ • • • 1 ~95 ~.II~PNU I / a IIh1111PIHIN'I' . b Mt.SpoMnaPxhOr C l'A,111'dl,ll•I•111'I.IU f` d l',1~t1Y111.1 •A111ti111N g v,u.i.r v aueunn vAkK ~ P,1rMWiY ` f ItAI.1-li1tNl',IIIF Ninc alilc h1eaJ n.on. Ho I 9 ikwn 1 h ,w WnuKO i, ~vo2 • , Fiv_11i1e Proirie Plei.cant Yrairie ~ Mn i K,u rki •uix . . I ,,.wUa~~. Hn 1 uC kAkIAM,[ION ~ Seven Mile I Lnuuru,i. mWI I I'l %Y0 wI I I F,I • ' o~. . A1o m Acets ~a o ~ wuum vuiim eo . D ~ Frand10.r~ A I ~ ~ I i 290 , Pasadcn,rPark Trcnlwuod ~ H / J ~ "J Qtisbrchards ^ ; Op J • .11111µ'OUd ~ ~0 Z 5~ I ! O O ( 1 a I t.0 ✓J `e~---i-~~~ FFI.ISIICLD ~ g SP k @ Veil • / T PA n Oiaaw~Y Are~ ~ 90 , I a ~ • SPr~U~~ A~~ o I Ill.lil I Su,.9ue Ave '1477 I D • a 0pp0flllllltY 0 J y c . I o v«aaale , , 7 I ~ 11 ~ I.ibert l.ake ~ ~ 29mn~ I flcntOSC ~'q unan.. 4 y • 5YDKpNl. IY'f1:NVA71UNA1. ~ AIflP11N1'I 4' ' ~9o SI~,~ ~ ~ti~ LOCA'I'IpN OF DI:PTII SL•'I.IECI'IVE ~ N1oron Prairie ~ N ~ GNOUNpWAT[12 TCSTSITIS 9 I a Qe a : ~ a GrounAwater Sampliug Sile s h , soukct:us,c.s. I llNk a11Ll~ ~ _ ~ tJaTER QUALI7Y FROM DEPTN SELECTIVE GROUND WATER SITES Ground 4later ldentifier Sampling Sampling Conductivity Dissolved Dissolved ~ Site Number Date Depth (micromhos) Chloride Nitrate (mg/L) (mq/L) 208 Baifour 25/44-17R1 77-05-18 77. - 1.6 1.2 Fark 76 - 1.6 1.2 • 79 - 2.6 1.4 83 - 2.4 1.4 98 - 4.7 1.5 118 . - 1.5 1.3 . • 77-08-03 70 309 1.7 .67 74 312 1.6 .94 88 310 1.7 1.1 114 360 1.8 1.2 ~ 77-08-05 70 258 2.2 1.2 74 249 1.8 1.2 88 254 1.8 1.3 114 - 256 1.6 1.3 77-10-13 77 375 6.4 ~ - 82 350 . 5.8 - 87 300 3.1 - 92 275 1.9 - 713 250 1.7 - . • • . • • 90 • 6.4 mg/1 near the top to 1.7 mg/1 at depth. Three prior samplings at this site, however, failed to give any Tndicati-on of stratification. Thi s coul d i ndicate that strati-fication i s a seasonal phenomena but sub- ~ stanti al ly more i nformati-on i s necessary before any def i ni tive conci usi ons can be drawn. Sampl es from si te 26/43-7G1 (Whi tworth Test wel 1) i ndicate a small chloride concentration gradient with depth. Only one sampling by USGS has been made at this site, wi•th chloride concentrations varying from 3.6 mg/1 near the surface to 3.2 mg/1 at depth. The data from this site is insufficient to draw any conclasi-ons regarding stratification. None • of the other monitoring si'tes gave any i-ndication of stratification. Coliform Bacteria A large number of bacterTOlogital tests have been run on ground water samples from the aqui,fer and the results are included in the files of the • Washington State Depa rtment of Soctal and Health Services and the Spokane County Health District. Plo summary of these data is oresently available. No attempt was made to ta6ulate these data as part of this report because the vast majority of analyses reflect the sanitary conditions of the wells and distribution systems and generally are not i,ndicative of the bacterio- logical quality of the aquifer. ~ Coliform bacteria have been identified in water samples from the aquifer at a number of sites. In the past at least.four cases of coliform bacteria problems have reportedly occurred. In these above cases, it is not known if the observed coliform bacteria were present because of contamination of the ground water or because of poor well construction. A large number of coliform 6acteria analyses have been run as part of the Spokane County "208" lktaste 14ater Management Program. The resul ts of these col iform bacteria analyses have 6een consistently negative from all sampling sites. ♦ b. The Probabl e Impact of the Proposed Acti on The development of the proposed r-esidentTal development project impacts on ground water quality may resalt from the following sources: (1) waste water collection, treatment and dTSposal facilities; (2) storm water drainage; • (3) solid waste disposal methods; (_4) chemical transport storage and use; and (5) disruption and covering of soil aue to construction activities. Percolate Dilution ~ As noted above the Spokane-Rathdrum aquifer is a very dynamic ground water systeni. It has an estimated average flow rate of 1320 CFS and moves at an average velocity of a6out 100 feet per day. The potential recharge of the aquifer that would occur from waste water disposal drainfields and precipitation over the aquifer is a very small percentage of the total aquifer flow as noted in the previous section. Any contaminants that are ~ carried to the ground water by percolation of these waters tivould be subject to substantial dilution. First, drainfield effluent waters would be diluted ~ 91 ~ by the relatively pure water appl ied to the surface area above the aquifer by precipitation and domestic Trr-Tgation. Todd in his study of the aquifer has estimated that drainfi-eld effluents constitute approximately 12 percent ~ of the total water appl teWo the surface area a6ove the aquifer in fully developed suburban areas. Taken over the entire Spokane Valley the per- centage would be much less. The followi-ng ta61e, adapted from Todd,30 pro- vides a summary of annual water balance and percolate water quality values for the Spokane Valley under su6ur6an develo ament conditions for the year 1975 and for the year 2020, assumi-ng a population increase of 54 percent during that period. ThTS analysis indicates the substantial dillution ~ of drainfield effluent that takes place, as the estimated total dissolved solids content of the percolate i's 302 mg/1, a value substantially below the spring water standard of 500 mg/l. A similar analysis fo r the year . 2020, assuming a 54 percent increase in population (and drainfield effluent) indicated that the quality of the percolate water will remain almost un- changed. Todd, in his analysis of the aquifer comes to the following • conclusion: The analytical resul ts of the forecast impact at year 2020 when compared with the present impact, both measured in terms of volume of leachate and dissolved solids con- centration, indicate tfiat the present impact on ground • water quality is already a signiflcant proportion of the_ ultimate level. In addition to this dillution that occurs as the result of percolation of precipitation and irrtgati,on water, the entire percolate will be diluted as it reaches the ground water and is mTxed witfi the main flow of the aquifer. ~ The amount of mi-xi ng that occurs,i n the 6ody of the aqui fer i s unknown. As noted in the previ-ous section, this percolate represents a very small po rtion of the total flow of the aquifer. The.somewhat higher contaminant levels repo rt in areas near the aquifer margin indicate that less mixing may occur in these areas than in the main body of the aquifer. • UJaste Water Col l ecti on, Treatment and Di sposal The following section on Sewage Treatment discusses the probable en- vironmental impacts from project related vraste water collection, treatment and disposal facilities. This includes a discussion of the probable impact on ground water quality. ~ S torm bJater Dra i naqe As discussed in other parts of the EIS the surface water runoff f rom the project site will be disposed of on-site through the use of a system of catch basins and dry wells. No provisions are made for the treatment ~ of surface water drainage. I't can 6e expected that surface water runoff from the project site will contain minor amounts of some ground water contaminants. These would include suspended solids, petroleum based hydro- carbons, dissolved inorganic salts (for example lawn and garden fertilizers) and herbicides and pesticides u5ed for domestic purposes. The majority of the contaminant are subject to substantial removal as the storm water • percolates through the soil column above the ground water. Soil systems do not generally retain anions including nitrate, chloride, sulfate and 92 ~ ~ ~ Summary of Annual Water- Balance and Percolation Quality Values for Spokane Ual l ey SuGurban Condi tions • 1975 2020 Mean Annual Precipitation, i-n. 19.5 19.5 ! Septic Tank Effluent, in. 3.95 6.24 Lawn Irrigation, in. 8.05 10.09 Agricultural Irrigation, in. 0.72 0.21 • Total Applied l-later, in. 32.22 26.14 Percolation, in./yr. 11.11 15.39 TDS of Percolation, mg/1 302 304 • Source: Todd, U.S. Army Corps of Engineers. • • • • . ~ 93 ~ bicarbonate. These dissolved inorganic material will move with the percolate waters and may pose potential for groand water contamination. • Sol id t,Jaste Di sposal As noted in the section on soli,d waste disposal below, it is estimated that the proposed project wi1l generate approximately 1,100 tons of solid waste per year. DTSposal of thi's soli-d waste would occur at existing County managed sani-tary landfills. The majority would be disposed of at ~ the County landfill at Mica, Glashington. It is not anticipated that the solicl waste generated by the proposed project would generate any significant or unusual amount of toxi c waste. The F1i ca 1 andfi 11 s i te i s shown on the following map. It i's not located over the aquifer-recharge area but is located in the designated streamflow area. This landfil] takes place in an abandoned clay open pit mine site. This clay surface around the land- ~ fill forms an impervious surface which provides a barrier to leaching of polluted water from the landfill site. Leachates from this landfill site does not pose any threat of ground water contamination. Chemical Storage, Transport and Use As indicated elsewhere i-n the EI'S space heating within the proposed ~ project site will 6e exclusi'vely 6y natural gas or electricity. It is not anticipated that any on-site storage of fuel oil or petro7eum products will occur on the project site. Thus a threat to ground water quality from the accidental spi*l 1 age or 1 ealcage of tFiese material s does not exi st. It is anticipated that by its very nature the proposed project would ~ result in the use of fertilizers, pesticides and herbicides for domestic yard and garden use. These materTals whi'le potential ground water pollutants, would not be used intensively enough to pose a threat to ground water quality.- Proximity to Water Supply'Wells, . The location of water supply wells in the vicinity of the project site are shown on the following map. Tlie water table gradient in this area results in a groundwater flow to the northwest as showm in this map. The closest well down the flowline from the proposed drainfield location is approximately two miles away. There is a well located within about 1/4 mile of the proposed drainfield site but it is not in the projected ground water ~ flowline from the drainfield. If the proposed project were to have any perceptible impact on ground water quality it probably would occur at well site 25/44-29A1 (.WWP 2-4). The distance of this well site from the project site is suffici*ent to preclude any significant localized impact. c. Measures to Mitigate Adverse Impacts ~ The potential impact of this project could be mitigated by reducing the density of the proposed project. This would have the effect of reducing proportionately the level of contaminant that must be controlled, treated and/or disposed of on the surface above the aquifer. Lowering the density of the project, however, may work against an ultimate solution to the pro- • blem of ground water contamination from drainfield effluents. Low density developments will be substantially more expensive to sewer if it is deter- • 94 ` ~ ~ ` • • ~'.r'~'\► ( µur~ . ~ • 1 ~ ~ NIIII~li1 l11 lilk~ ~ 1 I ~111~~11 INN1111~Itl111{ :90 ~ ~I11'~I1~ I '1:1 wo, - I~ - 'a. Q I tMIHI ,\Y. l v 1 I ~ ~~~`}1 < J n \ vo _ ' 25 33 liCl / yo = U r ~ • ` , • ~ ~ 92Q / IAI, l\' ~ Vr I ~ • ~ li1t111 / SPO N~ y + ~ , 11'HU~II 1\I .._T _ ~I'NU.II 1l1 M'H l 1 1'I ~ I)iSII~IA\ OPI'OR"fU\1'fl' ~3()1 VLRAI]AI-1: an ~ lD ~ _ Ul I - - 0,► ~ ru~ ~ ;yAI ; - - ~ /44 1 .~1L1 ~ m ?5J41 -'S14 _ 2S/dd ?71:1 19A2 - ?l(~I • ~ ~ • • s I J 25/4a % 15144 25144 26U I • isO;RtI ?~SRI ~ lA.l \RU$I N'J ICr-0erii i,u%Umt Irhilluk Ad wAICr ~1920~"'~Ic~clAanrac+jiuah~vclbl'unuwr i inlcrYal u ~ ~~~~,Nlircud~iw~i~inof~~~vnu•u+u+ _ 11'IiLLL(Il'A"PIONSIlf11YN$'I'RkA\I FHOJI PNO1fC('SITL•' zn\.\ lla.l:u~4ve~VSwveyxnler a~ih\~r ~ 6~~.~I~dixn~t~noucllandnumEn. - ~I I M.I. mme ~ Walei JupIdy N'A1 I 50UItl'li: U.S.G.S. h a . . ~ mined at the completion of on-going studies that a central sewage treatment facility is needed for the Spokane Valley.. The potential of proj ect related drafnfTeld or surface water efflu ent ~ contaminating the ground water could be mi-tTgated or prevented by the operation of monitoring we11s between the contaminant source and drinking water supply wells. These wells could be used to identify water quality trends or problems at the earlTest posst6le time. d. Unavoidable Adverse Im pacts ~ The possi bT] i,ty that some drai nfiel d or surface water effl uent wi 11 reach the water table and carry some contami,nants to the groundwater cannot be ruled out. The extent or magni'tude of this contamination is unknown at this time and is the su 6ject of several on-going studies. The proposed project provides the flexibilTty to meet future waste water treatment needs ~ as they arise. ~ ~ ~ • • ~ ~ 96 ~ ~ 3.9 Public Water Supplies a. Existing Conditions Sewage Collection, Treatment, and Disposal Facilities + In 1976 water was pumped from the aquifer at a rate of about 146 cfs for domestic and industrial uses. After being used, about 64 cfs (44 per- cent) of this water was treated in municipal or industrial sewage treatment plants and then discharged to surface water bodies. Of the remaining 83 cfs,_ about 49 cfs (33 percent of the pumpage) was lost to evapotranspira- tion. (See section on recharge to and discharge from the aquifer.) This ~ leaves about 34 cfs (23 percent of the pumpage) which returns to the aquifer through an assortment of waste water disposal facilities. Interim sewage treatment facilities processed about five of the 34 cfs - of waste water. These interim facilities are generally small systems which collect, treat, and dispose of waste water generated at apartment complexes, shopping areas, mobile home parks, housing developments, educational institu- ~ tions, recreational areas, military installations, motels, and hotels. These systems are not considered to be permanent and may be replaced in the future by extensions of existing sewer systems or by more elaborate small systems. The treatment processes utilized at these interim facilities are activated sludge, both extended aeration and conventional, and stabilization lagoons, some of which are provided with supplemental mechanical aeration (U.S. Army ~ Corps of Engineers, 1976). The effluent from these systems is ultimately discharged to drainfields, lagoons, or seepage ditches. Individual household systems disposed of the remaining 29 cfs - of waste water. The three basic methods of-individual treatment and disposal employed in the area overlying the aquifer include cesspools, septic tanks with drain- • fields, and aerobic treatment units with drainfields. The vast majority of individual systems consist of septic tanks arith drainfields (U.S. Army Corps of Engineers, 1976). The following figure shows the distribution of the various types of waste water treatment systems located above the aquifer in the vicinity of the project site. ~ A total of 76 residential units have been approved and are under con- struction in the initial phase of the proposed project. Of these 24 units are using septic tanks as on-site sewage disposal systems and the remaining 52 units are connected to an interim package sewage treatment facility. This existing plant has a capacity to handle a total of 119 units and employs an activated sludge-extended aeration process. The effluent from the interim ~ se4,►age treatment facility, as well as the on-site systems, is disposed of in a subsurface drainfield. The drainfield for the interim sewage treatment facility is located near the southwest corner of the project site as shown , on the project site map. b, The Probable Impact of the Proposed Action S As discussed in the section on ground tivater above, no definitive con- clusions can be reached regarding the possibility of waste water percolation ~ 97 ro9 WIiLI.CSLL'Y AVE I V°Rcy Sp ~ I ir ivex oervr. TREN 1 jj v •1 ~ e u v D11LLW0 c ' o ~ t cc ~ . J UPHIVFA Op y ~ w , y i TREN'CAYF.,~.C' ui x r• v v 0 0 4', Y Y/ LI CI:N D S POICAN p D / / 1PNAGI'I'AV. ~ C I: Uiiundary i)f itca umd Gy scwer ryHCm ~ VP ADAI.F. co ~ laicrim+oaigciicuinum pl2nt ~ NLwlcnlil area vncd by inliridual xplir IinAs, 0 cen~uKd~~u~~au~4ic1i"lineniunil. N 1„d~id r,-AJxiiinl itea kvrerf by IaAinJwl wpiic A ka,cn%p.Mft,ur ucn-hic Irulnunl unils i .ippiu%imaidy 50 hn murce p-ple ~ . • I.or.d'uc,I mJuwiul uma krveJ by wylu Vul'e, « 0 j . ~,eanp4wdticM undiic lualnxnl wJls E G ~ . ~ luJkwiid ueA -rvd Iry wplie ianA4 irnpxdv. Or :3 ~ ( ~ mruLk Itcilmcnl wiiie " ~ NIIUIIJd4VCIlAfgCIi15U1(O[CUO(lllifelllcenibum I CLl:NROSE 4'N'Jge fiealllkql IlCdllY ~ JIsIArc 6 I.C.wmd'Alcue NIY'I'ImGrr Indrtltan i p1STN11iUTI0A' OF 1YA51'L4VATL"R ~ ° sl fE,; f, cc c` s.waho~~~«riImtulida cc TRGATMENTFACIl.1TII:S °L •r. d.IliAyard PinLcawigl'lanl I r 5.5p~.a~c IiulnHcial YjtA I ~ > 6. 9JL1l'1 - I li'l1IqIhMI ~ j I ~ y 1. InianJ I-mpisr Y~pxi Cu I N.Alillwi.A J ` 4411iArc 1 IiihAu 9 tip~la~uQ I h!'Jc 10. K24-rNeuJ Id6ciimgtf IAmvt1i Ik-,dnund SCAI.Ii CiftA lu Lilik SIp,Afne Ri%n 1 ~ $I-IiJ-aalcvyli,pun;dyile SOURI;L; U.S.I~ S. ~ ~ • ~ ~ ~ ~ ~ ~ ~ ~ • . ~ ~ ~ to the ground water. The available data does give some indication of per- colation reaching the ground water thus in assessing the probable impact of the proposed waste water disposal system the conservative assumption that waste water percolate does reach the aquifer will be made. Effl uent Qual i t.y + The proposed project wi11 result in the disposal of a treated waste water effluent to a subsurface drainfield located above the aquifer. 4Jhen the project is fully developed it will result in the generation of approxi- mately 6.2 million cubic feet (.2 cfs) of waste water per year. Using a consumptive use factor as developed by Todd, 41 percent of this volume would ~ be available for percolation into the ground water system. Thus, it is possible that 2.5 million cubic feet per year (.08 cfs) of waste water per- colates into the aquifer. The chemical constituents of the treated waste water are potential contaminants of the ground water. A summary of the ef- fluent quality of the proposed extended aeration-activated sludge system compared to the typical effluent quality from individual septic tanks is ~ shown on the following table. In general the effluent quality from the activated sludge systems is improved over the septic tank system. While neither system is effective in removing nutrients (nitrates, phosphates, and other dissolved salts) the activated sludge system is much more effective than septic tanks in removing total suspended solids, biological oxygen demand and coliform bacteria. Even without disinfecting the effluent, acti- vated sludge systems are more effective in coliform bacteria removal be- , ~ cause of the better control of organic solids. Effluent Treatment in Soil Bios,ystems The quality of the potential effluent reaching the aquifer from a sub- surface drainfield will be improved over the quality of the effluent dis- • charged to the drainfield because of biochemical treatment mechanisms that occur as the effluent passes through the soil column above the ground water level. The mechanisms by which pollutants are removed from effluents applie~~ to soil systems are numerous and interdependent. As Spyridakis and 6~Jelch a note: . ...the overall process...is very complex because of the large number of variables involved. ...The fate of wastewater materials in soils is determined by a large number of processes, including physical retention, absorbtion on solid surfaces, plant and a microbial uptake, microbial degradation, volatilization, leaching, chemical breakdown, and precipitation. Most suspended solids are removed from treated effluents before they are applied to subsurface drainfields. This is necessary to reduce or eliminate clogging of the soil. Suspended solids which are passed to drain- ~ fields are primarily fine, organic solids arhich are removed in the top ~ 99 ~ ESTIMATED EFFLUENT QUALITY~ ~ Incoming Effluent from Treatment Process, mg/L IrJaste Water Activated Sludge- Septic Tanks Constituent (mg/L) Extended Aeration ` Total 225 20 50 Suspended Solids BODS 220 15 100 ~ NH3 as N 25 2 25 Nitrate as N - 28 Organic N 15 - 5 • Total PJitrogen 40 30 30 Phosphate 10 8 8 Fecal Coliform (#/ML) 1500-5500 2102 1500-5500 ~ 1 Adapted from references 6, 7,and 8 of Appendi-x B. page . • 2Assumes effluent is disinfected. i s s ~ 100 ~ ~ several inches of soil by physical filtration or absorption. After removal they are degraded by soil micro-organisms in much the same manner as soluable organics. Under conditions of proper hydraulic and organic loading, soluable organics (BOD) are taken up by soil Micro-organisms and converted to carbon dioxide, water, new cell material and a complex, relatively stable array of ~ organic compounds known as soil humus. Soil systems are also very effective in removing trace metal cations. Trace metals which are of concern include zinc, copper, nickel, cadTium and lead. Mechanisms which have been proposed for the removal include: • (1) Absorption by silicates at soil particle surfaces through surface absorption, surface complex ion formation, lattice penetration, and ion exchange. (2) Metal fixation and absorption by organic matter. (3) Surface absorption or surface precipitation on carbonates and/or silicates. • (4) Precipitation as a discrete oxide or hydroxide. (5) Biological uptake and immobilization. In general, removal efficiency of trace metals may range from 9h percent to 99 percent depending on the nature and depth of the soil column. ~ As previously noted, traditional secondary treatment systems do not efficiently remove the primary nutrients: phosphorous and nitrogen. Drain- field disposal of treated effluents may provide partial removal of these nutrients and therefore decrease the potential for ground water contamination, or if the percolate eventually reaches surface waters, eutrophication. , Phosphate removal is accomplished by physical/chemical retention by soil constituents; as well as uptake by cover crops, and removal from the site by crop harvest. As organic materials are degraded, complex phosphates are ultimately changed to simple (ortho-) ohosphates. Orthophosphates react with the iron, aluminum, and calcium present in nearly all soils to form very insoluable phosphate salts. These reactions may involve cations free a in the soil water which results in precipitation or the reaction may occur at the surface of soil particles which is termed adsoprtion. Physical-chemical removal of phosphates increases as the depth of the soil column increases and as the clay content of the soil increases. Clays are very fine mineral soil particles with very high surface area/volume ratios. They are thu14very reactive. Expected phosphate removal will range from 85 to 99 percent. ~ Nitrogen removal is somewhat more complex than phosphorous removal and the least understood. Most of the nitrogen in the traditional septic tank effluents is present as ammonium. Activated sludge-extend aeration system effluents, on the other hand, contain primarily nitrate. Nitrate (an anion) is very mobiie in percolation waters, while ammonium (a cation) is S retained strongly by soil particles. The ammonium ion (NH may be held temporarily by physical/chemical mechanisms similar to thole which retain orthophosphate. In alkaline soils a small portion of the ammonium ion will be converted to ammmonia (NH3) which may, in turn, escape as a gas. The re- maining ammonium is readily oxidized to nitrite (N02+) and nitrate (N03+) • 101 ~ ions by a group of aerobic soil bacteria., These anions, as well as the • nitrite and nitrate originally present in the irrigated effluent, are not well retained by the soil and move, in solution, with the irrigation waters. They may, however, be removed, in transit, by several mechanisms. Nitrite may be chemically denitrified to gaseous nitrogen (N2) and oxides of nitro- gen (NO ) which subsequently escape to the atmosphere. Secondly, nitrate and nitNte anions may be biologica]ly converted to gaseous nitrogen (Pl2) E, by denitrifying bacteria. These bacteria are anaerobic. Although little information appears to be available on the efficiency of these mechanisms, it is probable that they are only partially effective in reducing drainfield nitrogen. This is apparent for a couple of reasons. First, drainfield effluents are injected 14" to 36" below the soil surface. ~ This places them out of the most biologically active soil horizan, the top soil. Secondly, and probably most importantly, drainfield applications are not carefully controlled and optimal conditions for denitrification are not maintained. Soil systems do not generalTy retain anions including, in addition to ~ nitrate, chiorides, sulfates and bicarbonates. These dissolved inorganic materials move with the drainage water and may pose a potential for ground water contamination. Bacteria and viruses are removed from the treated effluent as it per- colates through the soil. Natural filtration is the primary mechanism of ~ removal. Crosby, in his studies of the aquifer also concludes that the low moisture content of the outvrash alluvium provides an environment which is not conducive to the survival of bacterial organisms. Crosby reports that the deepest level of bacterial organism observed aras at the 11 foot level below the surface 35 Because of their size, viruses are generally trans- ported to a greater depth than bacteria. Because the depth to the water ~ table is greater than 100 feet in most of the aquifer, and in excess of 50 feet in the area of the project site, penetration of bacteria and viruses to the water table is unlikely. In summary, effluent disposal in a subsurface drainfield can be viewed as a method of tertiary treatment (i.e, polishing of secondary effluents i by decreasing the concentration of organic contaminants, nutrients, pathogens and heavy metals). Anions, such as nitrate, chlorides, sulfates and bicarbonates are generally not removed in secondary treated effluents and are only partially removed as the waste water passes through the soil column above the ground water table. As such they pose the most significant poten- tial for ground water contamination from tne proposed waste water treatment system. ~ Sludge Disposal Sludge from the proposed waste water treatment system must be pumped and disposed of periodical'ly.' This sludge is raw and if not property s 102 ~ ~ handled could pose a public health problem. It is proposed that the waste water sludge be disposed of at the City of Spokane municipal sewage treat- ment facility. This would preclude any potential ground water contamination or public health problem that could result from disposal at a landfill-. Odor ~ An activated sludge-extended aeration system may result in obnoxious odors when not properly operated and maintained. However, when such systems are designed properly and attention given to important operating and mainte- nance characteristics such systems will operate odor free. Any sewage treat- ment system can experience odor problems during upset conditions. Odors . • from package treatment systems are not an unavoidable adverse impact. c. Measures to Mitigate Adverse Impacts Nitrates are the pollutant of greatest concern from the disposal of waste water effluent in subsurface drainfields located over the aquifer. While other anions would be carried with drainfield percolate and may reach ~ the aquifer they effect primarily the aesthetic quality of drinking water . and do not pose a public health problem. Other pollutants are very effective- ly removed by soil biosystems. The potential impact of nitrate contamination of the ground water could be mitigated by the addition of nitrification and denitrification unit operations to the proposed waste water treatment facility. These operations are extremely expensive when applied to small treatment • facilities. In addition they add significantly to the complexity of opera- tion of the plant, increasing the possibility of system malfunction and up- set. At the present time nitrification-denitrification unit operations are not employed on any sewage treatment facility in Spokane County, including the City of Spokane treatment plant. • The selection of an interim package treatment facility for the proposed project is a factor that will mitigate tne long-term impact that the project may Fave. Such ;nterim facilities are not designed to be permanent installa- tions but have the flexibility to be modified to provide a greater level of control or be replaced in the future by central treatment facilities or by more elaborate small systems. The collection and distribution system is al- , ready provided and the cost of connection to a central treatment facility would be minimized if it is determined that such a facility is necessary. Proper drainfield site selection wi11 also mitigate the potential for ground water contamination from percolation of drainfield effluent. The drainfield should be located to avoid areas where the water table is shallow, , slopes are steep or soil permeability is excessively high or low. d. Unavoidable Adverse Impacts The possibility that some waste water treatment system effluent will percolate to the water table and carry contaminants to the ground water ~ cannot be precluded. The proposed waste water treatment system, however, provides the flexibility to meet future waste water treatment needs as they d6"1$e. Y , 103 ~ 4. Flora a. Existing Conditions ~ The project site contains approximately 160 acres of cleared land which at one time was cultivated with agricultural crops. In the past the project site was used for the production of cereal grains and alfalfa. At the present time about 60 acres of the project site is in cultivation with alfalfa. The Spokane County Land Capability Study does not include the ~ project site within those areas designated as "prime agricultural crop land". Past crop yields from the project site have not been exceptional and con- tinued farming of the land is not.considered economical. The portion of the project site not presently in cultivation now sup- ports a continuous cover of herbs and forage grasses, mostly weeds which i consist of the following species: cheatgrass, bluegrass, fescue and alfalfa persiting from prior cultivation. There are no apparent unique, rare or endangered species of flora on the project site. • b. The Probable Impact of the Proposed Action The proposed action with its subsequent development would result in the permanent disruption of the current agricultural use of the project site. Approximately 160 acres of marginal farmland will be taken out of production. e Most of the herbs and grasses that exist on the uncultivated portion of the project site will be removed for the construction of roads and resi- dential structures. The existing flora will be replaced with domestic lawns, shrubbery and foliage. In most areas this domestic landscaping arill result in an enhancement of the existing situation. ~ c. Measures to Mitigate Adverse Impacts The disturbance or removal of existing natural vegetation may be miti- gated and in many areas enhanced by the use of domestic landscaping. d. Unavoidable Adverse Impacts ~ Approximately 160 acres of marginal farmland will be permanently taken out of production. 5. Fauna ~ a. Existing Conditions The Spokane River Valley and foothills provide a desirable habitat for a variety of wildlife species. The project site itself offers a similar potential wildlife habitat, but this is tempered by the intensity of human i development in the area. 104 e , The 4Jashington State Department of Game has indicated that a variety of wildlife species can be found on the project site. The wildlife popula- tion may be characterized as being comprised of resident and migrating species. Migratory that may occasionally be found on the site include north- western whitetail deer, cougar, and bobcat. Coyotes feral dogs, ground squirrels, striped skunks, yellow bellied marmots, whitetailed jack rabbits, and snowshoe hare are more numerous. Rodents include abundant field mice and moles. Important upland game brids include Hungarian (gray) partridge, ~ California valley quail, ring-necked pheasant, and ruffed grouse. The local Game Department biologist indicates that there are no known rare or endangered species inhabiting the project area. The project site does not appear to function as either a source of new animal species or as - a barrier or corridor to the movement or migration of fauna. ~ b. The Probable Impact of the Proposed Action . It is anticipated that the proposed project would result in some de- crease in the number and/or diversity of wildlife that inhabit the area. The construction of the residential development would result in a permanent ~ disruption of habitat for the large game animals. The smaller game animals may be forced to relocate but should generally remain in the project area. The development of the project site may cause minor disruptions of established movement patterns of terrestrial fauna. ~ c. Measures to Mitigate Adverse Impacts The retention of as much natural vegetation as possible will preserve some habitat for the smaller game animals and birds. Landscaping and planting of various shrubs, trees and foliage will encourage certain fauna species to co-exist with humans in an urban environment. i d. Unavoidable Adverse Impacts Disturbances to the ecological system may cause marginal reductions or relocations of existing species on the site. Some existing habitats may be disturbed by the proposed residential development. , 6. Noise a. Existing Conditions Noise is a physical phenomenon created primarily from the mechanical vibration of solid surfaces. Man's response to noise is determined by the a sound level emanating from the source of noise and the frequency spectrum of the sound. Noise intensity represents the level of sound which is weighted in accordance to the apparent loudness perceived by an average human observer. This number is expressed in "A"-weighted decibels and is written as dBA. The Washington State Department of Ecology has specified regulations ~ relating to maximum environmental noise levels. They have classified various areas or zones and established maximum permissable noise levels. These "EDNAs" (Environmental Designation for Noise Abatement) are classified as: ~ 105 ~ (a) Residential areas - Class A EDNA (b) Commercial areas - C1ass B EDIUA (c) Industrial areas - Class C EDNA ~ The maximum permissible noise levels for these zones are shown in the following table. NOISE LIMITATIONS • EDNA OF NOISE SOURCE EDNA OF RECEIVING PROPERTY CLASS A CLASS 6 CLASS C CLASS A 55 d6A 57 dBA 60 dBA CLASS B 57 60 65 ~ CLASS C 60 65 70 Bettiveen the hours of 10:00 p.m. and 7:00 a.m. the noise limitations of ` the foregoing table shall be reduced by 10 dBA for receiving property within Class A EDNAs. These noise levels may be exceeded on the receiving property by 15 dBA for 1.5 minutes, 10 dBA for 5 minutes, 5 dBA for 15 minutes for any one hour, day or night. Since the majority of arterials and highways regularly exceed the stan- ~ dards promulgated in Noise Limitations Table an additional set of standards has been established for motor vehicles and is shown in the table below. MOTOR VEHICLE NOISE PERFORMANCE STANDARDS Vehicle Category 35 MPH or Less Over 35 MPH , a P1otor vehi cl es over 10,000 ]bs. 86 dBA 90 dBA GRWR or GCWR Motorcycles 80 84 ` All other motor 76 80 vehicles Additionally, circular 1390.2 establishes standards for noise abatement ~ and control for all HUD projects. HUD policies discourage construction of new dwelling units in areas which have, or are projected to have, unacceptable noise exposures. Noise readings were taken at the four sites on or adjacent to the proper- ty. Values obtained are shown in the following table. These noise readings were taken on May 24, 1978 bettiveen 3:00 p.m. and 4:00 p.m, with a General ! Radio GR 1565-B sound 1eve1 meter. Weather was partially cloudy, warm, temp- erature about 70 degrees F. with moderate winds. 106 ~ ~ EXISTING NOISE LEVELS (dBA) a Site 1 Site 2 Site 3 Ambient Level 48 45 44 (minimum dBA) ~ Peak Level 61 57 48 (maximum dBA) Average Level 50-51 48-49 45-47 ~ b. The Probable Impact of the Proposed Action . The primary source of noise occurring as a result of the project is the noise increase due to increased traffic volumes. All areas within the project will shoai some increased noise levels. There will be a temporary increase in noise levels due to construction activity. Land clearing by bulldozers and building construction will temporarily increase noise levels. ~ However, these activities will be confined to daylight hours. It is anti- cipated that the greatest impact during the construction phase of the pro- ject will be upon the existing homes in Midilome development. c. Measures to Mitigate Adverse Impacts O The noise levels for normal residential activities and increased traf- fic cannot be reduced. Selective berming along heavily travelled rights-of- way or design features such as the absence of windows facing the noise source could attenuate noise levels for adjacent residents. Those dwelling units subject to higher noise levels could be sound insulated with heavier walls and double paned windows, and oriented to minimize intrusion of noise ~l into,.the more sensitive living areas. The use of properly maintained equipment with accepted noise attenuating apparatus will help to reduce certain noise levels related to on-site con- struction. d. Unavoidable Adverse Impacts An increase in ambient noise levels during the construction phase of the project is adverse and unavoidable. After construction of the project noise levels due to automobile traffic and suburban residential activities will be somewhat highe r than e xisting levels. ~ 7. Light and Glare a. Existing Conditions There are no sources of light or glare in the interior of the site. ~ Around the boundaries there are street lights on the existing roadways. ~ 107 ~ b. The Probable Impact of the Proposed Project The proposed development will replace natural land cover with human ` settlement features which will add new sources of light. This change will include new artificial street light on the site itself to satisfy safety and lighting requirements and allow for safe circulation within the site. This light will have little effect on the area surrounding the site as it will be of street light intensity and close to ground level. • Dwelling units will be provided with adequate artificial light for household act.ivity. c. Measures to Mitigate Adverse Impacts • Street lights will be designed to County requirements and to create an ~ aesthetically pleasing image in the neighborhood. Retention of as much existing vegetation as possible would help to reduce the impacts of light and glare. . d. Unavoidable Adverse Impacts None. ~ 8. Land Use a. Existing Conditions The project site is located generally south of the Opportunity subur- ~ ban area. At the present time about 60 acres of the project is cultivated with alfalfa which is marginally productive. The first phase of the proposed residential development, which was previously approved, is under construction in the northwest corner of the project site. The remainder of the project site is presently cleared and vacant land. ` The immediately surrounding land uses are primarily of a residential or agricultural nature, with much of the land being vacant. The land generally to the east and south of the project site is mostly vacant at the present time with a portion of the land being used for various agricultural purposes. An elementary school is located adjacent to the east boundary of the project ~ site. The area to the north and west of the project site is primarily resi- dential with densities ranging from medium to high. Scattered and small commercial uses also exist in this area. The projec± site is currently Zoned Agricultural. The existing zone classificationsin the vicinity of the project site are Single Family Residen- ~ tial, Agricultural-Suburban or Agricultural. b. The Probable Impact of the Proposed Action The proposed project would result in a change in the land use of the site from vacant and cultivated agricultural land to a single family resi- dential use. The proposed project provides for the construction of a totai ~ of 425 residential units on about 160 acres of land at a gross density of about2.6 units per acre. Typical lots wiil have about 85 feet of frontage 108 ` ~ and contain about 10,500 square feet of area. Actual density will vary • somewhat throughout the development due to roadway layout and topographi- cal constraints. Phase one of the proposed project, which includes 72 resi- dential units located in the northwest portion of the site, has previously been approved and is now under construction. The density of the proposed project is compatible with the surrounding residential uses. In addition the proposed high density residential use is r necessary to economically support the development of the utility and service infrastructure which wi11 serve the development. The installation of a sewage collection system would not be economically possible for a l'ower density alternative. The high density of the development also makes it pos- sible to provide housing opportunities for persons of moderate income. It is anticipated that the housing units in the development will range in price ~ from $40,000 to $60,000. A lower density alternative would require a higher unit selling price and a reduced housing opportunity for persons with moderate income. c. Measures to Mitigate Adverse Impacts • The impacts resulting from the increase in the intensity of the land use of the site could be mitigated by the development of a lower density project. This, however, would have the effect of increasing the price of the housing units and limiting partially the housing opportunities for mod- erate income families. In addition it could effect the economic feasibility of providing a utility infrastructure for the project. ~ d. Unavoidable Adverse Impacts The proposed project will result in an increase in the intensity of land use of the project site. ~ 9. Natural Resources a. Existing Conditions Approximately-60 acres of the project site is currently used in the production and cultivation of alfalfa hay. In the past the project site ~ has been used for the cultivation of both wheat and alfalfa hay. The pro- ject site is considered relatively poor farm land and crop yields have not been exceptional. b. The Probable Impact of the Proposed Action ~ The devel opment of the h1i di 1 ome resi denti al subdi vi si on wi 11 resul t i n the use of lumber, concrete, and othe r building materials in the construc- tion of homes and the corresponding infrastructure of utilities and streets. In addition to this consumption of natural resources, the development will also decrease the land area now supporting the production of agricultural crops, although only a portion of the project site is currentiy in cultiva- . tion. The land itself will be committed to the proposed suburban residen- tial use for the foreseeable future, and the investment in improvements will reduce the options for alternative future uses of the site. . 1 09 ~ c. Measures to Mitigate Adverse Impacts None. • d. Unavoidable Adverse Impacts Approximately 160 acres of agricultural land will be permanently taken out of production. • 10. Risk of Explosion or Hazardous Emission a. Existing Conditions None. ~ b. The Probable Impact of the Proposed Action The risk of explosion or release of hazardous substances will be a temporary one during construction phases of development. It will be limited to construction equipment accidents and improbable natural gas releases during installation of the utility infrastructure needed to serve the ~ residences. Once the development is completed, all safety requirements will have been met and no upsets would be probable. c. Measures to Mitigate Adverse Impacts All reasonable safety precautions should be observed during the con- ~ struction and habitation of the project site. d. Unavoidable Adverse Impacts None. • • • • 110 ~ i~ ELEMENTS OF THE HUMAN ENVIRONMENT 1. Population a. Existing Conditions The proposed project site is located in the Spokane Valley, which is ~ designated as the east area of the metropolitan area of Spokane County. Since 1950 this area has shown the most significant growth in the county. The population of the east rea has shown the following growth from a 1950 population of 28,383:3g Population Percent Increase Over 1950 ~ 1960 47,373 67 percent 1970 579896 104 percent 1976 759015 164 percent During the same period the distribution of population in the valley as opposed to the total county has increased from 12.81 percent in 1950 to ~ 19.65 percent in 1970. Meanwhile, the city of Spokane's share 3~as shown a decline from 72.99 percent in 1950 to 59.31 percent in 1970. This parallels the general national trend of population shift to the suburban areas. The census figures for 1970 show total county poY lation at 287,487; city of Spokane at 170,516; and the east area at 57,896. The county . populibion is expected to reach 318,000 by 1980 and 386,000 by the year • 2000. Population'projections are not available for the Spokane Valley but it is probable that recent historical trends will prevail. According to Valley Chamber of Comnerce data, more than 1,000 families per year moved into the Valley from 1970 through 1973. Approximately one-third of these • families per year moved from the city of Spokane, one-third from the re- mai nder4bf Washi ngton, and most of the rest from Cal i forni a, Montana and Oregon. b. The Probable Impact of the Proposed Action ~ The proposed Midilome residential development would provide a total of 425 units over a three year period. Assuming an average population of 3.2 persons per dwelling unit, this project when fully developed would house a total population of 1,350 persons. c. Measures to Mitigate Adverse Impacts • None. d. Unavoidable Adverse Impacts To the extent that population growth increases the demand for public ~ services and institutions, it may be perceived by some persons as an adverse impact. In this instance it would be considered both unavoidable and adverse. ~ 111 ~ 2. Housing a. Existing Conditions ~ The 1970 Census of Housing and Population shows that there were 99,869 housing units in Spokane County in 1970. Of these, 64,338 were located in the City of Spokane and approximately 16,266 were located in census tracts that include the Spokane Valley. Spokane County Building Department offi- cials indicate that the total number of housing units in Spokane County in- ~ creased to about 122,000 units in 1977. The Spokane Valley is the portion of the County experiencing the greatest ra-te of growth in housing units. The southern portion of the Valley has experienced considerable growth in housing units in the past several years due primarily to the abundance of undeveloped land in this area. ~ According to figures pub]ished by the Spokane Board of Realtors the average sale price of homes sold through the Multiple Listing Service during 1977 was $35,500. b. The Probable Impact of the Proposed Action The Midilome subdivision will provide a total of 425 single family ~ housing units when completed. It is anticipated that complete development of the project will occur in phases over a three year period. It is anticipated that building lots within the project site wi1T sell for between $8,000 and $10,000. The cost of the completed housing units ~ are expected to range between $40,000 and $60,000. This lies within the moderate price range for new construction. It is anticipated that the pro- ject will provide housing opportunities for younger families with moderate income levels. c. Measures to Mitigate Adverse Impacts ~ Restrictive covenants requiring approval of construction plans will help guarantee that the design of the units integrate with the other housing in the area and the environmental characteristics of the project site. d. Unavoidable Adverse Impacts • None. 3. Economics a. Existing Conditions • The project site is presently undeveloped except for the first phase of the proposed project which is under construction in the northwest portion of the project site. Prior to development in 1977 the property had an assessed value of $114,800 and the 1977 real estate taxes were $2,688 at a millage rate of 23.416. ~ 112 • I~ b. The Probable Impact of the Proposed Action ~ Construction costs for the proposed development are estimated at about $11,000,000. An undetermined number of jobs would be created during the three year construction period of the project. An increase in personal in- come and tax revenues in the local economy would result during the construc- ti on phase of the project. • - The project site has a current assessed value of about $114,000. As- suming an average per unit value of $45,000, the total anticipated assessed value of the development would be $18,850,000 when completed. This would result in total real estate taxes from the development of about $442,000 per year. • The property millage rate for the project site is $23.416 per $1,000 of assessed valuation. A breakdown of the property tax by recipient follows: Recipient Millage Rate Tax Revenue $/yr. State 4.821 919000 ~ County 1.963 372000 County Road Fund 2.167 412000 County Library Fund .487 9,000 School District #356 11.344 2141,000 Fire District No. 1 2.634 509000 ~ Total 25.416 $ 4423,000 , c. Measures to hlitigate Adverse Impacts None. • d. Unavoidable Adverse Impacts None. 4. Transportation and Circulation ~ 4.1 Vehicular Transportation Generated a. Existing Condition The project site is served by a network of state and county roads. ~ Pines Road, Bowdish and University Streets are the primary north-south traf- fic carriers in the area connecting the area south of Opportunity with Sprague Avenue and Interstate 90. Pines Road and the Dishman Mica Highway both pro- vide direct access to Interstate 90, approximately 2.5 miles north of the project site. Thirty-second Avenue is the primary east-west traffic carrier in the vicinity of the project site. The annual average daily traffic counts ~ for the major arterial serving the project site are shown on the following figure. 113 • N'III.LSLt1',\vC I V2Ilrp SQ ~ ~ I TR f NT1YOOll v Pµ%,qvK VPR11'fR I)H11'I. ~ . F I'~ Nf.W11AN LAKt POAI) F ~ -j - 5Pp~AA " I ~ ~E E RIVF.R ~ I rJ City cucia~ve M1LI.W001) , o . < ~ I ~s~~ctP~~ 2q ~~wMP > I ~ ~ J Z UNRIYF.R u~i ~r_. 90 ui cn 0 5 Q > TRENTAVE 0 t u`./ °C ~ ~ ~ u z ° y BROADN'AY AV£ SPOICAN~ a 5PRAfUI: .iVk ' SPRAGUf AVE J I SYRAGUE AVL' DISHMAN OpPORTUNITY i ~ VERADALE I o 0 i o " , I cr z } a I:th Are 3400 cc L I y~ ~ ~ l7tn nve I , I n N C o 100 ~ ~ I a 7° 3680- - N < I~ } W 4 79lhArc I CLENROSE 1990 1770 __270 i 32nd Ave n,le.o aeo a . i ANNUAL AYERAGE DAILY, S1TE e o ( cc TRAF,FIC COUN7'S (1977) _ m z / ! ~ < ~ L 2460 1420 N ~ N ~ IIIhAre ~ L Q I ~~e <IIA Avc u ~ newma.iKxrv.i~ „...,SCAI.E . ' `""i0ae...'.""~"''."''""'`"""' SOURCE: Spokane County Engineer's Dcpartment ~ ~ The major traffic generators in the vicinity of the project site are the existing residential developments. b. The Probable Impact of the Proposed Action Construction related traffic generated by the proposed project should not be significant as it will be distributed over the anticipated three ~ year development of the project. At the end of the development period the construction related traffic would diminish. ' The most significant transportation impact would be the result of the traffic generated by the residential development. This impact would gradually increase over the development period and peak when the project is completed. r An estimate of the probable impact due to the residential traffic generation may be derived from the peak daily traffic volumes forecast from the proposed project site. Assuming a worst case situation, that each dwelling unit will generate eight vehicle trTps per day, and given 425 residential units, the estimated traffic gene rated by the project would be 3,300 vehicle trips per day. This traffic increase would be distributed over the existing roadway • network. An extensive roadway system within the development is proposed. A map of the proposed roadway system is shown on the following page. Al1 roads within the proposed development will be curbed and paved to maximum Spokane County standards. At the present time the roadway system does not provide ~ for sidewalks. The proposed roadway system integrates exceptionally well with the existing roadway network. Numerous access points to the four secondary arterials that surround the project site are provided. This wi1T allow excellent distribution of the traffic over the existing roadway system. c. Measures to Mitigate Adverse Impacts ♦ None. d. Unavoidable Adverse Impacts The proposed project will result in an increase in the traffic volume ~ on the roadway system in the vicinity of the project site. 4.2 Parking N/A ~ 4.3 Transportation Systems Please refer to the above section on vehicular traffic generated. 4.4 Movement/Circulation ~ Please refer to the above section on vehicular traffic generated. 4.5 Waterborne, Rail, and Air Traffic N/A ~ . 115 ~ 32ND AYENUE ~ Existing Porhon ~ ~f ~ ~ iMidilome Addition ~ ~ ~ . ; i ~ °a y f~, . Z l n , • jjjjol ; . . . t ~ ~ 40TH AVEN(7E ~ pROPOSED ROACa V!/AY ~ SYSTE M N ~ 200 Feet ~ I . 116 ~ 4.6 Traffic Hazards • Issues of traffic safety are discussed in the sections on vehicular traffic generated and public services (schools). 5. Public Services ~ 5.1 Fire a. Existing Conditions The project site is located within the boundaries of Fire District No. 1, which serves an area of approximately 74 square miles in the Spokane ~ Va71ey. The Fire District operates six stations in its service area at the present time. The closest station to the project site is Station No. 1 located at East 10319 Sprague Avenue. This station is located about two miles from the project site with an estimated response time to the site of three to four minutes. Stations No. 2, 5 and 6 are all located within four miles of the project site. The location of the stations are shown on the ~ following public service facilities map. b. The Probable Impact of the Proposed Action The proposed action will result in approximately 425 new residential units becoming the responsibility of Fire District No. l. It is not anti- ~ cipated by Fire District officials that this development alone will neces- sitate the hiring of any additional staff by the Fire District. It is probable, however, that the cumulative impact of residential growth with the Fire District boundaries will require the addition of both staff and facili- ties by the District. • The project does not pose any unique or unusual fire hazards and it is not anticipated that the proposed project would result in the need for any special fire fighting equipment. c. Measures to Mitigate Adverse Impacts Potential fire hazard within the project site could be reduced by the ~ use of noncombustible material in construction and a project design that facilitates fire vehicle access to the project site. Access to the project would be enhanced by the naming of streets within the project site to cor- respond with the naming used in the existing street system surrounding the site. The extension of water mains and fire hydrants onto the site will also provide additional mitigation of fire hazard. • Any increase in Fire District services necessitated by the proposed development would be mitigated by the addition of new tax revenues in the amount of approximately $50,000 per year, d. Unavoidable Adverse Impacts ~ The proposed project would result in an increase in Fire District No. 1 service requirements. ~ 117 . 41'I:L41.tiI.I:Y AVI: I Vdky SQ , `vi14nµ~vFitrkiVFkuaIVi Ta[NTWOQU z9 ~ I N • NfW\IAN LAFf, R041) I E Cd I ~ j'% Sp~~qNE ltIVCR Y I ~~lv AIILLIV00D ° I:uchb Avc ~ ! Cire StaUon No. l y ` I N~y~DSP > • 2g0 J ~ \S ~ ~ t N UPMV4R I 0~ y c < N ~ ° a ❑ ~ W TNEN7 AVC/ ~,ly ~t'~1~ ~ < ^ VAlley Afission ~ Park & Puul V 0 z a I LL Z BROADWAY AYI: Police 9ubslatiDn ~ C►QK~N~ O ` O F~S~alion No.l F'ire Stulion No. 5 SPRAGU! AVE I SPRAGVIiA1'k _ SPkAGUI:AVk DISIIDIAN' OPPORTUNITY VERADALE ~ / FireSintion No.6 Q m ~ UIUYCTJIIy H1BJ1 ~ Centrnl Valley ~ School x z High Schonl l2in nve NyS o h1cDmiald Elemenlnry 0 r ~ liihArc \ Terrace View K ~ 9o University Acmentary pdrk & Poo! p~ ~ I p ''a m ❑ 5 EvergreenluniorNigh ~ E LA . lkwdisli Pnrk Site lwiior Hi ~ 1 ~ . ~ ).nd Ave 291D avc GLl:NROSE 1 31c1A~~t ~ LOCA7'IONOF PUBLIC SERVICE FACILITIES ; M,/~Chester ElemenUuy 0 ~ • \ m 6 ~ v Pnnderusa Dementaryl > (new) ~ M I L~N j v ~ ~ I/lh Arc ^ 4411% Avc ~ h „ ~ r1~RWIMb IVUe~L~V,1~4 xAI•! ~ GuJ~in 1. miwron/.2w ~Iw.n~u.wn { + s ~ ~ ~ . . ~ • • . • ~ ~ 5.2 Police ~ a. Existing Condition~ Law enforcement services are provided by the Spokane County Sheriff's Department. The project site is located in patrol district No. 3 which covers about 50 square miles in the Spokane Valley. The Sheriff's Depart- ment operates a substation at the Fire District No. 1 station located at • East 10319 Sprague Avenue. The location of the substation is shown on the public service facilities map. The substation is located about two miles from the project site with an estimated response time of between three to four minutes. According to Department officials, the Sheriff's staff is under manned at .75 officers per 1,000 population. 0 The Washington State Patrol provides traffic enforcement and backup services in the area. b. The Probable Impact of the Proposed Action The proposed project wi11 result in some increase in the service re- • quirements of law enforcement agencies. c. Measures to Mitigate Adverse Impacts Impacts on law enforcement agencies may be mitigated to some extent through crime prevention techniques integrated into the design of the 0 structures, lighting and landscaping. Any increase in law enforcement services necessitated by the project would be mitigated by the addition of new tax revenues to Spokane County in the amount of $37,000 per year. ~ d. Unavoidable Adverse Impacts The proposed action will result in an increase in law enforcement service requirements. 5.3 Schools • a. Existing Conditions The project site is located within the Central Valley School District No. 356. The District operates 18 school facilities from grades kindergarten through high school. These facilities include eleven elementary schools, 0 four junior high schools and two high schools. The location of schools within the vicinity of the project site are shown on the public service facilities map above. Elementary: The project site is within the attendance area of the Chester Elementary School which is located on Pines Road adjacent to the eastern ~ boundary of the project site. Nearly all of the elementary schools in the area are operating at or above their design capacity. The district plans to have a new elementary school constructed and ready for use in the Ponderosa area west of the project site by September 1, 1979. ~ 119 . ~ Junior High School: The project site is within the attendance area of the Evergreen Junior High School which is located about 1-1/2 mile from the • project site. The 1978 enrollment at Evergreen was 650 students, near its design capacity of 700 students. Long range plans for the district provide for the construction of a new junior high school by 1982. The site for this proposed facility has not been determined. High School: The project site is located within the attendance area of ~ University High School which is located about tVro miles to the north and west. University had a 1978 enrollment of about 1,315 compared to a design capacity of about 1,250 students. Long range plans for the district provide for the construction of a new high school by 1982. b. The Probable Impact of the Proposed Action ~ The impact of the proposed project will probably be felt by the school district during the period from 1980 to 1982. Using an attendance factor of 1.2 students per residential unit it is anticipated that 500 students will enroll in the district schools due to the Midilome development. A breakdown of these students by grade level is shown in the following table. ~ SCHOOL ENROLLMENT EXPECTED FROM MIDILOME Number of Percentage of Grade Level Students Students . K through 6 250 50 ~ Junior High School 125 25 High School 125 25 Total 500 100 Source: Centrai Valley School Oistrict ~ The overcrowding that now exists in district elementary schools will be a problem during the 1978-79 school year. This pressure will be relieved by the opening of the new Greenacres Elementary School in September 1978 and ~ the Ponderosa School in September of 1979. School district officials have indicated that with the opening of these new schools, the Chester Elementary would then be able to accommodate the students from this subdivision. The impacts on the junior and senior high school from the project are expected to be more severe. These schools are now operating near or over capacity and the district plans for new facilities probably cannot be im- ~ plemented by the time that the students from the subdivision enroll. This could cause some temporary overcrowding in these facilities until a new junior and senior high school are opened. The proposed project would rein- force the need for new junior and senior high school facilities within the district. ~ 120 ~ ~ c. Measures to Mitigate Adverse Impacts The impact on the elementary schools will be mitigated by the expansion ~ of facilities planned by the district over the next 18 months. The peak impact from the proposed subdivision would not occur until after the new facilities were opened. Because the elementary school lies adjacent to the proposed project the safety of children walking to school could be enhanced by a provision for sidewalks, on at least one side of the street, in the area near the school. • The impact on the junior and senior high schools would be only temporary until the district were capable of opening new facilities to accommodate the growth in housing within the district. The temporary impact could be mitigated by the realignment of school attendance boundaries and busing students to less crowded facilities in the district. ! The increase in school district services necessitated by the project would be mitigated by the addition of new tax revenues to the Central Va11ey School District in the amount of approximately $214,000 per year based on the 1978 levy rate. ~ d. Unavoidable Adverse Impacts The proposed project will result in an increase in the service re- quirement of the school district from the addition of about 500 new students. This may cause some temporary overcrowding in existing district facilities and would intensify the need for new school facilities within the district. + The overcrowding would be most severe in the junior and senior high schools. 5.4 Parks a. Existing Conditions ~ The proposed project would be served primarily by the parks and recrea- tional programs of the Spokane County Parks and Recreation Department. The County utilizes a regional park system. The County is at the present time developing a park site located adjacent to the project site at the intersection of Pines Road and 32nd Avenue. Terrace View Park and swimming pool operated by the County is located about three-quarter mile north and ~ east of the project site. The Chester Elementary facilities are also used for recreational purposes. The location of parks and recreational facili- ties in the area are shown on the public services facilities map above. b. The Probable Impact of the Proposed Action ~ It is expected that the proposed project vrould result in an increased utilization of existing park and recreational facilities. Pdo additional parks or recreati onal faci 1 i ti es a re i ncl uded i n the proposed proj ect . The surface above the sewage treatment plant drainfield will be planted with grass but will not be used as a park. c. Measures to Mitigate Adverse Impacts ~ Any increase in costs incUrred as a result of the increased utiliza- . tion of existing parks and recreational faci-l iti,es would be mitigated by the addition of new tax revenues. ~ 121 ~ d. Unavoidable Adverse Impacts . None. 5.5 Maintenance a. Existing Conditions • Maintenance in the area of the proposed project is presently provided by Spokane County and by private property owners. This involves primarily the repair and improvement of the County road system. The existing package sewage treatment plant serving the first phase of the project has not re- ceived all necessary approvals and is maintained by the developer. . ! As the proposed project site is undeveloped at this time, no mainte- nance activities occur on the project site at the present time. b. The Probable Impact of the Proposed Action The proposed project wi]1 result in the dedication of a road system ~ of approximately five miles of paved roadway, requiring a corresponding increase in maintenance by Spokane County. The water system serving the development would be maintained by the Model Irrigation District. The existing package sewage treatment facility will be expanded to serve the entire development. It is anticipated that when the system re- ` ceives all necessary approvals that a maintenance and operation agreement will be executed with Spokane County giving the County responsibility for the maintenance of the system. The County in turn will collect user fees to offset the maintenance and operating costs of the system. c. Measures to Mitigate Adverse Impacts ~ Any increase in maintenance costs necessitated by the proposed project would be mitigated by the addition of new tax revenues and the imposition . of user fees. d. Unavoidable Adverse Impacts ~ The proposed project will result in an increase in the maintenance of utility and transportation systems serving the development. 5.6 Other Governmental Services No significant impact on other governmental services is anticipated. ~ 6. EnergL a. Existing Conditions At the present time the area of the proposed project is serviced with ~ electricity and natural gas by the 4Jashington Water Power Company. 122 ~ ~ b. The Probable Impact of the Proposed Action ~ Construction of the proposal would consume energy, mainly in the form of fuel for construction equipment. As tracts are developed, energy com- mitments would include the use of electrical energy for heating, lighting, cooking and other domestic activities; use of natural gas mainly for home heating; and motor fuel for commuting and other transportation of residents and customers. ~ It is estimated that the fully developed proposal would consume ap- proximately 250,000 therms of natural gas and 1.5 to 2.0 million kilowatt hours of electrical energy per year. These estimates are based on current averages for new construction as indicated by the Washington Water Power Company which would serve the project. Insulation standards set by HUD would be adhered to, but since they are no more rigorous than local prac- ~ tices, no incremental energy saving is expected. The Washington tiJater Power Company indicates that current energy sources are adequate to serve this proposal and other anticipated growth in Spokane County. Traffic generated by the proposed project would also represent a signi- ficant increase in the amounts of fuel consumed as a result of the project. • The rate of use of motor fuel for private transportation is in large part dependent on commuting distances from residential areas primarily to work locations but also to shopping, recreational, cultural and other facilities. Full regional shopping facilities are located within 2.5 miles of the pro- ject site. Numerous entertainment, recreational, cultural and educational facilities are located'in the Spokane-Spokane Valley area. • c. Measures to Mitigate Adverse Impacts The proposed development could employ innovative conservation measures which would result in reductions in potential energy consumption. The requirement for plan review by the developer will result in the opportunity ~ to incorporate construction design features to obtain greater efficiencies in the utilization of energy resources. The following measures are recom- mended: (1) Adequate insulation in roof, walls, and ceilings to reduce heat transmission. ~ (2) Use of high performance furnaces that can recover waste heat from flue gas or those with a flue shut-off. (3) Use of heat retaining fireplaces or wood stoves. (4) Use of high-performance air conditioning units (if absolutely necessary for climate control) with open air cycles. (5) Provision of storm windows and storm doors. ~ (6) Provision of windows that can be opened and closed. (7) Use of tinted glass in windows. (8) Double glass vrindows. (9) Use of landscaping on the south and west sides of the buildings. (10) Provisions for screens, shades, and curtains. (11) Well-ventilated attics. (12) Use of dark colored roofs. (13) Use of flourescent rather than incandescent lights. ~ 123 ~ In addition to the above measares, orrentatfon of housing units can save heat costs by collectTng the maximum amount of solar heat through the day. The utilTZation of these m easu res Ts pri-marily at the discretion + of the individual home 6ui-lders or buyers. d. Unavoidable Adverse Impacts The proposed pro j ect w111 resul t Tn new-demands for energy consumpti on in the area. ~ 7. Util ities 7.1 Energy See Section 6 above on Energy. • 7.2 Communication Telephone services wTll 6e provi,ded to the ar-ea 6y Pacific Northwest Bell Telephone Company via underground-atTlTtTes. 7.3 Water • a. Existing Conditions The project site is not presently served with water. There are private wells near the project site that are used for irrigation of nearby agricul- tural fields. It is proposed that the project site be annexed to the Model • Irrigation District. Model has indicated its intent to annex the project site subject to certain improvements to be made by the developer. b. The Probable Impact of the Proposed Action The proposed project Yrould result in an increase in the consumption of ~ water to serve the residential development. The estimated quantities of water consumption from the project for domestic and irrigation purposes are discussed above in the section on Ground Water. The District has indi- cated that it plans to install a new well within the proposed project si te. ! c. Measures to Mitigate Adverse Impacts The location of any new wells on the project site should take into careful consideration the proximity and location of the proposed sewage treatment drainfield. See'the section on Ground Water above for a more tho- rough discussion. ~ d. Unavoidable Adverse Impacts None. • 124 ~ ~ 7.4 Sewer ~ The impact of the proposed sewage treatment system proposed for the project is discussed in detail in the section on sewage treatment facilities above. 7.5 Storm 4Jater ~ The method of handling storm water and its probable impacts are dis- cussed above in the section on Surface Water Runoff and Absorption. 7.6 Solid Waste • a. Existing Conditions Valley garbage service provides solid waste disposal services for the Spokane Ualley area. The waste is disposed.of at the Spokane County operated sanitary landfill at Mica, Washington. b. The Probable Impact of the Proposed Action • It is estimated that the proposed project will generate approximately 1,100 tons of solid araste per year when fully developed. It is anticipated that this solid waste would be disposed of at the Spokane County managed sanitary landfill at Mica. According to the Spokane County Engineers Department the Mica Landfill has an estimated life of 10 to 12 years at the • present time. c. Measures to Mitigate Adverse Impacts None. d. Unavoidable Adverse Impacts The proposed project will result in the need to dispose of about 1,100 tons of solid waste per year. 8. Human Health ~ Issues of human health are addressed in the sections on ground water quality and public services (schools). The project site itself does not pose any specific hazards to human heal th. 9. Aesthetics ~ N/A 10. Recreational Please refer to the section on pu6lic services (parks). + 11. Archaeological/Histori,cal The project site is not identified as havTng any unique or specific archaeological or historical significanceo ~ 125 ~ C ITAT IOP! S l. Drost, D.bt., Spokane Valley-Rathdrum PraTrYe Aquifer, Washington and Idaho, U.S. Department of tlie InterTOr, Geological Survey, Open File ~ Report Number 77-829, 19780 2. IUewcomb, R.C., Seismic Cross Sections-Across the Spokane River Valley and the Hillyard Trough, Idaho 'and Waslitngton; U.S. Geological Survey, Open File Report, 1953, 16 pages. 3. Ibid. ~ 4. Drost, D.W., o, cit. 5. Ibid. 6. Ibid. ~ 7. U.S. Army Corps of Engineer-s; 'Metropol Ttan Spokane Region Water Resources Study: Sumnar,y Report, 1976. 8. Drost, D.W., o, ci t. ~ 9. Ibid. 10. Ibid. 11. Ibid. • 12. U.S. Army Corps of Engineers, o, cft. 13. Crosby, J.W,, IlI', Johnstone, D.L., and Fenton, R.L., Migration of Pollu- tants in Gl acial Outwash Environment, Parts I-III; Water Resources Re- search Volume III, 1970. • 14. Crosby, J.W. III, Johnstone, D.L., and Fenton, R.L., Migration of Pollu- tants in Glacial Outwash Environm ent, Part III, Water Resources Research Volume III, No, l, pages 204-208, 1970. 15. Crosby, J.W. III, Johnstone, D.L., and Fenton, R.L., o. cit., Parts I-III. 1 16. U.S. Army Corps of Engineers, op. cit. 17. Crosby, J.W. III, Johnstone, D.L., and Fenton, R.L., o, cit., Part I pages 204-208. • 18. Drost, D.W., op. ci t. 19. Safe Drinking Water Act, Public Law 93-523. 20. 43-FederaT Register 28, pages 55-56; February 9, 1978. * 21. 40 Code of Federal Regulations 149; September 29, 1977. 126 ~ ~ 22. Drost, DoW., op_._ cit. 23. Ibid. ~ . 24. Esvel t, L.A., Interim Water Qual i ty-Moni-tori ng 'Report, Spokane County 208 Program, Spokane County Englneers OfifTCe, February 1978. 25. Ibid. ~ 26. Esvelt, L.A., o, clt. 27. Drost, D.W., op. cTt. 28. Esvelt, L.A., o, cit. ~ 29. U.S. Army Corps of EngTneers,'o , cTt. 30. Ibid. 31. Spyri daki s, P. E. and GJeI ch, E. B. ,"Treatment Processes and Envi ronmental Impacts of Waste Effluent DTSposa-l. on Land", Land Treatment and Disposal ~ of Municipal and Industrfal Wastervater, 'R,L. Sanks and T. Hsano, editors; Ann Arbor Science, Ann Ar-bor, MichTgan; 1976; pag es 45-83. 32. Ibid. 33. Sopper, W.E., "Use of the Soi1 Vegetative Biosystem for Waste Water Re- ~ cycl'ing", Land Treatment and Disposal of Municipal 'and Industrial Waste- water, R.L. Sanks and T. Asano, ealtors; Ann Arbor Scfence, Ann Arbor, Michigan; 1976; pages 17-43., 34. Ibid. ~ 35. Crosby, J.4J., III, op. cit. 36. Spokane Area Development Council, Percentaqe Change in Population, Spokane County 1940-1976, 1976. 37. City Plan Commission, Cit,y of Spokane Population 1880-1990, 1976. ~ 38. Ibid. 39. Ibid. 40. Ibid. • ~ ~ 127 ~ APPEtIDI'X B ~ SECTIOPJ 1 CHEMI'CAL QUALI-TY OF GRObPJD WATER FROM G-JELLS IN THE VI'CI'NI-TY' 0F THE P~ROJECT SI'TE • Table Notes: 1. National I-nterim Pr-Tmary Or-inkTng Water Regulations (U.S. Environmental Protection Agency, 1975). ~ 2. National Proposed Secondary Water- Regulattons (U.S. En-vironmental Pro- tection Agency, 1977). 3. Spokane County "208" 6-Jaste Water Management Program Prel iminary Field Data Results. 4. Spokane County "208" Vlaste Water Management Program, Prel imi nary Washi ngton 40 State University Analyti-cal Resulits. 5. Department of Social and Health ServTCes. 6. Environmental ProtectTOn Agency. ~ 7. Washington State Department of Health. 8. United States Geological Survey/Bureau of Reclamation. 9. Pacific Laboratory of San Francisco, Cal ifornia. • 10. Pittsburgh Testing Laboratory. ~ ~ 0 128 . ~ • a ~ • • • • • • • CWEh11CAL QUAL f TY OF f,ROUPIDIJATER SAMPLE SITE NUhiSER: 25/44-29A1 . SITE LOCATION: Plll Corner, 20th & Dalfour (4141P 2-4) Ilata Date Denth Water Specific pW iurbidity Threshold Dissolved Oissolved Dissolved Hardness Dissolved Aissolved Dissolved Total Total Total "ctai Source Sampletl (ft.) Temp- Conduct- (units) (JTU) Odor Silica Iron tdanganese (Ca,mg) Chloride Fluoride Sulfate fditrate flitrite Phos DisSCi;ed eraturc ance Number (S10p ) (Fe) (Mn) (-ng1L) (CL) (F) (SOy } (PJ) (f~) (F3 p ) SoliC; (°C) (units) (inglL) (ni9/L} (nig/L7 (n~y/L) (ing/L) (ing/~) (ing/L) (in9/L) .onglL) ~~9l0 Standard Primaryi- 5 2.0 10.0 Secondary2 (6.5 or 3.0 0.3 .05 250.0 250.0 )8.5 ; 208F3 12J07/77 9.0 350 a fl 158 1.3 3 4t; 208F 10/26/17 9.0 380 6.6 , 181) 6.1 ~ 4.4 208F 10/03/77 10.0 360 6.9 214 6 4 ' 4.5 2n8F 7/05/11 9.0 385 7.0 118 6.1 3.6 208F 6/14I17 9.0 315 6.5 179 5.9 4.0 r~ 208W 4 6106/77 281 172 7.4 R 0 1.1 .020 211.4 ~ DSIIS5 9114172 350 8.0 .7 0 6 5 ,16 .015 168 7.5 .11 14.5 1.9 . 0l 1 06 180 .DS11S 9123/72 340 1.7 .6 f► 10.0 .16 012 232 5.5 ,40 21.5 2.5 .014 .05 261 DSNS 7/11/72 368 B.fl .7 fl 0 .26 .003 1RR 11.5 14 9.0 2.4 .043 .14 192 DShIS 6/16/72 320 7.9 .5 0 2,60 .18 003 176 6 5 .113 18.7 2.1 .013 0 192 DSNS 5/11/72 10.0 310 8.1 .35 0 23,60 .06 .003 118 6.0 .18 19.2 3.1 ,018 .07 235 DSHS 4/18/12 300 8.0 .7 A 1,5r1 ,()A 0 172 3 25 .13 12.2 1,52 .r)22 .12 155 DSHS 3/31/12 300 7,8 1.3 0 7.0 .36 .003 112 3.5 .136 18.6 1.62 .312 ,12 193 DSIIS 2/14/12 340 8.2 .6 0 4.50 .42 .006 200 5.n .138 12.0 4.2 .012 ,02 197 DSHS 1/18/72 330 8,3 .4 0 2.50 .18 0 188 5.5 .145 13.0 2.9 .036 .41 192 DSNS 12/13/71 330 1.8 .6 0 ,5 .14 036 232 8,5 .12 9.3 3.0 .057 .23 238 DSHS 11/15/71 350 1.6 .8 Q 1.50 .04 n03 24n 4.5 .098 7.8 3.3 n58 o 220 QSHS 10/13/71 340 7.9 .7 0 fl .12 0 192 6.5 .117 21.2 3.0 .027 .11 202 DSIIS 9/14/71 384 1.9 .52 0 4.5Q 0 .009 196 6.5 .105 16.8 2.8 .OrIA .05 220 DSIIS 9/23/70 10.0 125 8.0 1.0 0 8,8 .14 .006 142 3.0 •10 5•5 3'2 ,034 .15 199 CHENICAL QUALITY OF GROUPdOblATER SAPIPLE SITE NUM[iER: 25144-11R1 ~ ; SITE LQCATION: 20II 13alfour Park DaCa Uate Depth 4Jater Specific pN Turbidity Threshold Oissolved Dissolved Dissolved H.3rdness Dissolved Dissolved Dissolved Total Total Total Totai ~ Source Sampled (ft.) Temp- Conduct- (units) (JtU) Odor Silica Iron 14anganese (Ca,mg) Chloride Fluoride Sulfate Nitrate Nitrite Phos Dissol;ed ; erature anCe Number (S Q ) (Fe) (Mn) (,ng/L) (CL) (F) (SO ) (N) (rI) (POp ) Solics I (°C) (units) (mj/~.2) (mg/L) (m9/l.) (mg/~) (mg/l) 1m9~~) (m9/L) (mg/L) (m9/~' (m9lL; , Standard Prioiaryl - - 5 2.0 10.0 - - Secondary2 <6.5 or 3.0 0.3 .05 250.0 250:0 500.: )a.5 20$F 11/29/77 0 11,5 400 6.3 130 1.0 3.5 208F 11/29/17 6 11.5 365 6.3 164 6.4 2.9 ~ ~ 208F 11/29/71 12 11.5 255 6.5 146 3.0 2.6 ~ 208F 11/29/77 22 11.5 250 6.5 142 1.9 2.5 208F 11/29/77 49 11.5 265 6,5 122 l.) 2.1 ~w 20814 10/13/11 0 12.0 375 6.9 196 6.1 2.5 191.3 p 210'~!.' 10/13/17 0 2.4 2081d 10/13/77 0 12.0 375 198 6,1 13.5 2.6 186.3 208W 10/13/17 0 2.4 20841 10/13/17 10 12.0 300 6.9 116 3.1 13.0 1.8 20814 10/13/71 25 1.56 208F 10/13/17 25 12.0 275 6.9 152 2.0 1.60 208F 9/14J17 3 2.03 2081d 9/14/77 3 11.5 335 6.9 126 2.0 13.0 1.6 206F 9/14/17 12 146 2.0 2.0 2086J 9/14/17 22 1.54 208F 9/14/71 22 2.0 20814 9/14/17 22 1.60 2081d 9/14/77 30 140 2.2 l.$ 208F 9/14J77 12 11.5 285 6.8 144 2,2 2.0 208f 9/14/77 22 11.0 210 6.7 142 1.8 2,0 209F 9/14/71 30 11.0 265 6.9 138 1,7 2.4 2Q8F 9/14/71 45 9.5 250 6.8 128 1.4 2,6 ~ ~ i r ~ ! • • • • • • CHFh11ClIL QU{ILITY pF GROUPJD4JATER SAFIPLE S[TC NUMDLl2: 25/44-17R1 ~ S1TE LOCATIOhI: 208 Qalfour Park (con't.) - Data Oate Depth Water Specific pH Turbidity Threshold Aissolvecl Dissolved Dissolved Ih rdness Uissolved Oissolved Dissolvetl Total Total Total Tota' Source SamUled (ft.) Temp- Conduct- (units) (JTII) Odor Silica Iron hlanyanese (Ca,mg) Chloride Fluoride Sulfate Nitrate Nitrile I'hos IJisso- :ec erature ance riumner (s o ) (Fe) (r1„) (-n9/L) (a) (F (so ) P04) so~;_: (°C) (units) (in~/lz) l.) (m /L) (mc/~) (m IL) ~ 9 J 9 ~ing~ ) (niy/L ) (mg/L ) (nig/L ) (mg/_ ~ Standa rd Primar•y' 5 2.0 10.0 Seconda ry 2 <6.5 or 3.0 - 0 3 . n5 - • - 250.0 . . . 250 0 - . . . _ _ _ 501", - )0.5 208W 8/04/71 0 12.0 250 6.8 128 1.9 11.0 1.1 105.0 20841 8J04/77 0 1.32 208f 8/04/77 1 271 144 7.4 2.78 208F 8/04/71 5 220 132 6.3 1.60 208lJ 8/04/77 6 1.46 208F 8/04/77 6 12.0 295 6.7 ' 154 2.1 1.80 208F 8/04/77 12 11.5 265 6.6 136 1,7 1.80 W 209W 8/04/17 20 1.29 208F 8/04/77 20 11.0 250 6.2 124 1.8 1.80 ' 20Qf 8/04/71 25 230 136 5.3 1.45 2081J 8/04/77 45 • 1.23 208F 8104/17 45 11.0 250 6.5 128 1.5 1.60 20AF 8/04/71 50 216 124 3.2 1.29 2084J 1/01J77 0 1.90 20811 1101177 0 12,0 300 6.4 146 3.2 11.0 3.0 119.0 zoaW 7/07i77 o 2.27 2081J 7/01171 6 11.0 260 6.6 208F 7/07177 12 11.0 252 6.7 136 1.8 1.9 208W 1/01/77 1.42 208F 7/01/77 22 11.0 260 6.7 13$ 2.4 1.90 208F 7/07/17 22 11.0 1.40 208F 7/07/77 42 11.0 250 6.8 126 1.9 1.80 208W 5/26/17 22 232 132 2.2 12.0 1.41 105.0 20841 5/18/71 3 232 120 2.2 11.0 1.18 105.0 CNEMICAL QUALITY OF GROUNDWATER SAMPLE S(TE NUMQER; 25/44-26L1 S[TE LOCATION: Corner Adams and 24th (Uera no. 4) Data Qate Depth Water Specific pN Turbidity Threshold Dissolued Dissolved 6issolved Hardness Dissolved Dissolved Dissolved Total Total Total Tntal ` Source Sampled (fi.) Temp- Conduct- (units) (JTU) Odor Silica Iron 14anyanese (Ca,mg) Chloride Fluoride Sulfate Nitrate Nitrite Phos Dissolvee. erature ance Number (S~0z ) (Fe) (~dn) (-ng/L) (CL) (F) (50 ) (N) (POq) Solids ' (°C} (units) (ing/L) (m9/L) (mg/L) (in9/L) Iin9/L) (olg/l.) (m9/I.) (ing/L) ;niy/L) S ta nda rd . Primaryl 5 2.0 10.0 - Secontlary2 <6.5 or 3.0 0,3 .05 250.0 250;0 50r',! , >8.5 206F 11/01/77 PI/A 10.0 425.0 6.5 208.0 3.3 3.4 2Q8F 10l05/1I rUn 9.5 420.0 6.8 216.0 3 S 3.5 208F 6/25/77 N/A 9.5 410.0 6.1 206.0 3 1 3.3 208F 1I13/17 IV/A 10.0 400.0 6.8 186.0 3.5 3.2 208F 6/14/77 II/A 10.0 360.n 6.4 186.0 2.8 3.2 W 20841 6/03/77 Il/n 302.n .Ol 188.4 3.2 12.0 2.44 .ol 219.3 . q_ , .06 208 N DSHS 9/30/74 438.0 1.1 Q 19 fl 01 180 6.4 1 32.0 2.0 EPA6 9/14172 350 1.1 0 ,1(1 Q(12 183 2 Q 0 13.0 2.3 .012 .010 223 I OSHS 9/14/72 326 6.8 0 5 5 .06 Onb 182 4.0 .2 28.0 2.1 .046 .02 180 ( .Olh .Ql 215 DSHS 8/23/72 332 7.9 1 11.n .06 .003 232 3.0 6 28.0 1.7 ~ USHS 7/17/72 380 7.9 Q 1.7 ,14 009 180 10 Q 1 14.0 1.9 .004 .17 195 OSHS 6/19112 326 8.0 0 5.5 ,20 009 192 4.0 .1 25,0 2.0 211 OSHS 5/22/72 11.0 200 8.0 0 11,0 .02 .Q6) 136 3.0 .l 17.0 1.7 02 134 DSNS 4/18/72 324 7.9 Q 4.8 .Ol 0 208 . 2 5 .l 23 1.4 .10 2118 DSIIS 3/31/72 310 1.9 1 0 10 .003 172 2 0 ,1 23 1.4 .pll 181 DSHS 2/14/12 340 8.2 0 7.5 lf, .fIOG 264 5 .2 22 11.0 .Oll 0 254 ~ QSHS 1111172 310 8.3 1 7.5 .06 .015 200 5.0 .1 14 2,4 .032 .26 207 DSNS 12/13/71 326 7.1 0 6.0 .30 009 164 .52 .7 11 2.8 .049 .16 171 DSHS 11l16171 , 346 7.7 1 2.5 .22 .006 118 3 0 .l lA 2.9 .042 1.0 186 DSHS 10/13/11 340 7.8 D 0 .02 .029 112 6.0 .l 3n 2.6 .007 ,09 196 ~ DSHS 9/14/11 310 7.3 ~ 2,5 .1714 .003 244 10.n .l 20 2.1 ,015 .04 260 DSNS 8/09/11 340 7.6 0 5 n .2a 0 156 7 5 .l 19 2.3 .033 .17 188 . DSIIS 11/04/70 10.0 340 7.6 1 7.5 n .006 174 3.0 .l 18 3.7 p p 212 ~ • • ~ ~ i i • ~ • • • CNEMICAL QUALITY Of GROUND4!{1TCR SAMPLE SiTC NUh113ER: 25/44-2611 SIlE I.OCIITION: Corner Aclams and 24th (Uera no. Q) , Data Date Depth l4ater Specific pll Turbidity Thresholtl Dissolved pissolved Dissolved liardness Dissolved Dissolved Dissolved Total Total Total Tota Source Sauipled (ft.) Temp- ConducC- (units) (JTU) Odor Silica lron Manganese (Ca,ing) Chloride Fluoride Sulfate Nitrate Nitrite Phos Oisso:vec~ eratinre ance Number (S 0 ) (Fe) (Mn) (,i~g/L) (CL) (F) (SO ) (Pd) (~i) (PO ) Solics ' (°C) (units) (mj/?) (m9/L) Iin9/LI (iji9/I.} (m9JL) (nlg/~) (ing/L) (m91L) ;ing/f ) (m9/-) ~ Standard . Primai•y~ 5 2.0 10.0 ' SecondaryZ <6.5 or 3.0 0.3 .05 250.0 250;0 5nn,~ ~ >8.5 , 4lSntt7 1 n; o7/h4 11 320 8.3 4 18 ri . nq nn5 192 2.2 .2 12 2.2 .003 .17 ' W9DII 3/02/64 ln 320 7.6 n 20.0 .nn nr)2 156 3,4 .2 12 5.1 .005 .62 188 ' GSaft8 0/-/51 261 159 , 3.4 ; I i' r W a W ~ ~ ; ~ 1 CIIEh91CAL QUALITY OF GROUNDWATER SArdPLE SITE h1U14(3ER: SITE LOCATIOt{il•I Corner, 16th & Pierce (Model no. 1) Data Date Depth Water Specific pH Turbidity Threshold Qissolved Dissolved Oisso1ved Hirdness Dissolved Dissolved Dissolved Total 'Coral Totlal Tot:Source Sampled (ft.) Temp- Conduct- (units) (JTU) Odor Silica lron I•ianyanese (Ca,mg) Chloride Fluoride Sulfate Nitrate (Jitrite Piios Oi ssc'vec erature ance Number (S~02 ) (I~e) (P~In) (-ng/L) (CL) (F) (50 } (~I) (i') (rC~) `ol;:; (°C) (units) tn~9J`I (wg/L) ~~iig /L) (ing/L) fm9/L7 (1119J1) (niy/L) (OIgIL) (IIICJIL) Standard Primaryr 5 2.0 10.0 . t6.5 or 3.0 0.3 .05 . 250.0 250.0 Secondary2 )8.5 i if LSF 6/10/14 12.0 259 7.8 .01 0 132 2.0 ,l 8,0 2.2 .028 119 i 65HS 5/10/11 260 8.I1 .3 0 6.25 .08 0 132 3.5 •087 18.8 2.55 .014 flfi 161 I . ~ .p 1 . ~ ~ • ~ ~ ~ • ~ ~ . • • • • a CIIEh11CAl QUALITV OF GROUNDlJATER SAMPLE SITE NUMHCR: 25/44-28L1 ' •S[TE LOCATION: _UII f.nrner, 25th RRo-idish (MOdel No. 2) Data Date Depth Water Specific pH Turbidity Thresholtl Dissolved Dissolved Dissolved Hirdness Dissolved Dissolved Dissolved Total Tatal To`al :ota' Source Sampled (ft.) Temp- Conduct- (units) (JTU) Odor Silica iron Manganese (Ca,mg) Chloride Fluoride Sulfatz PJitrate Nitrite Pho; Cissoived erature ance Number (S'0? ) (Fe) (14n) (,og/L) (CL) (F) (SOa) (h) (L') (D:,,;) 5olic+s (°C) (units) (m9/L) (n~9/L) (i~g/L) (in9/L) (~~9/L) {mg/~) (mg/L) (m9/1.) (inq/L) (nig/! } Standard I'rimaiy r . 5 2.0 10.0 Secondar)2 (6.5 or 3.0 0.3 .05 250.0 250;0 >8.5 DSHS 5/10/71 275 8,0 .4 0 3.0 .34 0 194 6.25 .08 19.6 3.43 .035 .09 219.0 J W Ln } CHEh11CAL QUALITY OF GROUNDbJATER SAh1f'LE SITE PIUMBER; 25/44 - 22N1 51TE LOCATION: 14th & Ilouk Streets (Ilodern no. 7) Data Date Depth Water Specific pli Turbidity Threshold Dissolved Dissolved Dissolved Hardness Dissolved Dissolved Dissolved Total Total Total Totai Source Sampled (ft'.) Temp- Conduct- (units) (JTU) Odor Silica Iron I•langanese (Ca,mg) Chloride Fluoride Sulfate Plitrate Nitrite Phos Dissolved erature ance Number (S 0 ) (Fe) (tM ) (.ng/[.) (CL) (F) (50 (N) (I;) (POq ) Soli~s (°C) (wlits) {m~j/~) (~n9/l) (m9/L) (mg/L} (my/l) ((mg/L) (mg/L) (mg/C) lin9/!I Standa rd Primary~ 5 2.0 10.0 - _ Secondary2 <6.5 or 3.0 , 0.3 .05 250.0 250.0 5f)r,. >S,5 DSNS 7/G2/7 5 tJ/A 211.0 1.9 ,2 9J) .24 Ol 160.0 2.0 .4 13.2 1.7 ,24 .Ol DSfIS 5/12/10 tl/ll 232.0 0.1 ,28 n 20 84.0 4.0 .636 6.1 1.44 126 PTIf'10 ? - 220.0 7.8 - 10.0 .10 llb C 1.8 4.1 2.0 154 J W ~ . • • • ~ • • • ~ . . ~ i • • r • ~ • • • • CIIEMICAL QUALITY OF GROUNDWATER SAMPLE SITE NUh1QER: 25/44-27L1 SITE LOCATfON: Corner 22nd & Vercler (41l•!P 2-5) Oata Date Qepth Water Specific pH iurbidity Threshold Dissolved Dissolved Dissolved Hardness Dissolved Dissolved Dissolved Total Total Tctal 'otal Source Sampled (ft.,) Temp- Conduct- (units) (JTU) Odor Silica Iron Manganese (Ca,ing) Chloride fluoride Sulfate Nitrate Nitrite p!-,os :issolved ~ erature ance Number (Sl02 ) (Fe) (Mn) (-ng/L) (CL) (F) (SO ) (1-1) (1.1 (F7 ) Solids (°C) (units) Im9(mg/L) (my/1.) 'm9/L) (mg/L) (mg~t) (mg/L) (m9/L),mg/L) iin9lL) . Standard Primary' 5 2.0 10.0 Secondary2 < 6.5 or 3.0 0.3 .05 250.0 250;0 5r)n,(I , )8,5 DSIIS 5/30/75 350 8.1 .4 16.8 .25 a 196 5.0 .3 15.0 1.4 ,010 0 OSI9S 5/11l10 8.9 323 8.2 .23 0 20.fl 1.35 fl 138 4.0 , .10 7.2 2.15 .024 .15 189 , w V CMEI4ICAL QUALITY OF fROUCIDblATCR SAMPLE SITE f4U14liER: 25/44-28P1 S1TE LOCATION: PJId Carner 30th R Prerce (4odel No, 3) Qata Date Depth Water Specific pli Turbidity Threshold Oissolved Dissolved Dissolved Hirdness Dissolved Dissolved Dissolved Total Total Total Total Source Sampled (ft.) Temp- Condutt- (units) (JTU) Otlor Silica lron I•langanese (Ca,mg) Chloride Fluoride Sulfate Nitrate PJitr9te Phos Dissolved erature ance Number (S 0 ) (Fe) (Iin) (,ng/L) (CL) (F) (SO ) (N) (I~) (p0q ) Solids (°C) (unitS) (m9/L) Ifl)9/L) (in911) (~p9/L) (~~9/L) (m9/~) (uiy/L) (n~y/~-) (uty/L) 6rag/L) SCandard . Primary'~ 5 2.0 10.0 Secondary2 <6.5 or 3.0 0.3 .05 250.0 250;0 500.0 )8.5 DSHS 5110/11 368 A.n .3 0 5,0 ,16 n 194 3.0 .15 17.7 3.3 .034 .15 20S•0 w 00 ~ ~ i r • ~ • • • ~ • • CHEPIICAL QUALITY OF GROUND4lATER , SAh1Pl.E SITE NUMQER; 25/44-29A2 ; SITE LOCAT[ON: tII-I Cnrner. 20th I)alfour (!,Jl•1P 2-1) , Uata Date Depth Water Specific pH Turbidity Threshold Dissolved Dissolved Dissolved Hardness Dissolved Dissolved Dissolved Total Total Total Total Source Sampled (ft.) Temp- Conduct- (units) (JTU) Odor Silica lron 1-langanese (Ca,mg) Chloride Fluoride Sulfate NitraCe Nitrite Phos Oissolved erature ance Number (S1 OZ) (Fe) (14n) (,ng/L) ; (CL) (F) (SOq ) (N) (k) (PO ) Solids (°C) (units) (mg/L) (m9/l) (m~l/~-) (mg/L} Im9/L) (ing/L) (nig/L) (ing/L) 'mg/L) Iing/L) Standard Primaryi- 5 - - 2.0 10.0 SecondaryZ C6,5 or 3,0 0.3 .05 250.0 250.0 5(r).0 )8.5 ' I)SHS 9/23/70 10.0 125 8.0 J 0 8.75 .14 .006 142 3.0 .103 5.5 3.1 .021 .36 199, DSHS 9/21/70 10.0 400 7.5- .9 0 1 5 fl .009 206 21.0 .135 28.8 6.9 .04 .38 309 ~ W ~ ~ CHEPi1CAl QUAI.[TY OF GROUttDWATER SAMPLE S1TE NUM6ER; 25/4-9-2$Rl S[TE LOCATION: PI4J Corner, 32nd & Pines (IfflP 2-2) Oata Date Depth 4later Specific pH Turbidity Threshold Dissolved Dissolved Dissolved Hardness Dissolved Dissolved Dissolved Total Total Total ?cta- Source Sampled (ft.) Temp- Conduct- (units) (JTU) Odor Silica lron Manganese (Ca,mg) Chloride Fluoride Sulfate Nitrate IVitrite Phos Disse:ved ' erature ance Nuinber (S 0p ) (Fe) (14n) (~og/L) (CL) (F) (SOg ) (N) (I~) (p0g ) Soli:s (°C) (units) (n19/~) (mg/L) (mg/L) (mg(iug/L) (mg/L) (mg/L) I~~9/C) Im9/_} Sta nda rd u Primary' 5 - - 2.0 10.0 _ SecondaryZ <6.5 or 3.0 0.3 .05 250.0 250,0 _ 50C.>8.5 OSNS 9/15/15 317 7.8 ,1 0 15.8 • .20 0 260 7.8 0 15.4 5.3 .07 .18 DSHS 9/14/71 380 8,2 .44 0 4.0 .04 .009 324 16.0 .074 19.5 4.3 ,017 .30 335 J ~ C) • ~ • • ~ • . • • • • CFIErlICAL qUAL1TY OF fROUNDWATER SAMPLE SITE NUf4BER: 25/44-27E1 SITC LOCATIQPJ: SE Corner, 22nd Ext. S. Pines (1lndern no. 9) ` Data Date Qepth Water Specific pH Turbidity Threshold Dissolved Aissolved Qissolved Hardness Dissolved Dissolved Dissolved Total Total Total Total Source Sampled (ft.) Temp- Conduct- (units) (JTU) Odor Silica (ron Manganese (Ca,mg) Chloride Fluoride Sulfate hlitrate IJitrite Piios Dissolved erature ance Nuiiiber (S~02 ) (fe) (Mn) (,ng/L) (CL) (F) (SO ) (hl) (t~) (FO ) Solids (°C) (units) (iug~.) (my/L) (ma/t.) .in9/0) (mgll) ' Stantlard ' Primary~ 5 2.0 10.0 , Secondary2 <6.5 or 3.0 0.3 .05 250.0 250 0 50r' 1 >8.5 208F 11/1/77 IJ/A 11.0 34(l.0 6.7 162.0 4.1 3.5 208F 10/4/17 N/A 11.4 350.0 6.9 1)a.f) 4.2 2.9 ZOIIW 10/4177 II/A 11.0 279.n 6.9 <10 rl 168 n 10.2 13.0 2.6 (.Ql 178.3 208F 8/25l77 al/A 11,0 345.0 6.2 17(l.r) 4,2 3.4 208F 7/06/17 II/A 11.0 348.0 1.2 166 0 3.9 3.6 J 4~:b 208F 6/14/71 II/A 11.0 330.0 6.9 1 ti3 n 3.81 3.3 ~ DSNS 5/11/75 M/A 312.0 1.9 .4 12.0 .16 --172.f) 6.5 .l 16.7 2.8 .03 .Ol 116 0 pSNS 9/14/72 II/A 300.0 7.5 .3 fl Fi 5 lfl 006 152.0 5.0 .111 19.8 1.92 .Ol 161.0 DSIIS 8/23/12 11/A 216.) 1.8 .53 n 9,8 ,04 nn9 172.0 5.0 .32 21.5 1.6 .013 .02 172 0 DSNS 7/17/72 II/A 304.0 1.3 .6 0 22.n .38 006 Inn p 11,5 .14 13.8 1.9 .036 .10 185.0 DSHS 6/19/72 fI/A 26n.0 8.0 .4 n 11.1 n1 lflf3.1) 5.0 .135 19.1 1.62 .016 173.0 uSHS 5/11172 N/A 12.6 284.0 6.15 .5 0 14.1 14 . M9 170.n 4.75 .088 14.3 2.55 .016 .08 169,0 DSHS 4/19/12 II/A 268.0 1.2 l 0 5.0 .12 .003 2n8.0 .092 18.3 .35 .026 .32 223 DSNS 3/28/72 il/f4 250.0 7.8 .7 0 1 .0 .22 .003 152.n 1.5 .096 27.2 1.0 .012 .06 156 I1SHS 2/16/72 II/A 234.4 7.9 1.2 n 4.n .10 nn3 144.0 2 25 .055 14.5 1.68 .054 .35 138 DSHS 1/17172 N/A 300.0 8.2 .7 0 .1n .006 152.0 1Q.5 .145 15.0 2.5 .028 .17 182 DSHS 12/14l71 N/A 300.0 8.0 .41 n • 2.0 .018 144.0 27.5 .092 13.1 2.7 .05 .13 118 OSNS 11/16/71 PJ/A 276.0 6.5 .B 0 5.0 .30 .()09 148.0 4.n .n62 13.0 3.1 .044 147 DSIIS 10/14/71 rt/A 284.0 7.8 .97 fl 9.8 .12 .f109 158.r) , 8 25 .064 16.8 3,13 .002 194 DSHS 9/14/71 PI/A 384.0 7.8 .3 fl 5.n .2r1 .006 248.0 9.0 .011 16.8 .14 .004 .16 244 ' DSNS 9/29/10 14/A 10.0 260.0 7.6 .4 0 12,50 .003 1W0 3.25 .1174 14.8 2.27 .012 .14 140 ~ ~ s APPENDIX B . • . SECTION 2 GROUPID WATER QUALITY DATA FROM VARIOUS AQUIFER CROSS SECTIONS • ~ r • e 142 ~ ~ ~ ~ • ~ • i • i • • WATER QUALITY AT VARIOUS AQUIFER CROSS SECTIONS N. City Outlet Springs State Line Poortunity Parkwater Limits and 4Jells Conductivity, mho/cm , Mean 278 302 260 294 336 Std, Deviation 21 32 26 46 155 No. Samples 61 70 103 31 42 Hardness, mg/1 as CaC03 Mean 154 155 141 151 198 Std, Deviation 16 19 19 28 39 PJo. Samples 61 71 90 32 40 Chlorides, mg/1 Mean 0.81 1.82 1.49 2.54 7.82 Std. Deviation 0.30 1.22 0.44 1.15 4.11 W No. Samples 61 71 90 36 40 Nitrate-Nitrogen, mg/1 Mean 1.27 1.60 1.65 2.08 3.33 Std. Deviation 0.37 0.51 0.32 0,56 1.48 No. Samples 61 71 91 30 39 Alkalinity, mg/1 as CaC03 Mean 121 130 111 156 Std. Deviation 7 16 13 18 No. Samples 14 16 26 3 Sulfate, mg/1 Mean 12.6 12.4 12,4 17.1 28.4 Std. Deviation 2.2 2.6 2.8 6.6 18.3 No. Samples 16 19 32 4 12 .Sodium, mg/1 Mean 3.10 4.58 3.35 4.23 Std. Deviation 0.33 1,64 0.41 0.06 No. Samples 15 16 26 3 Source: "208" Field Data Aquifer Cross-section Conductivity Hardness Chloride Nitrate Sulfate (micromhos) (mg/L CaC03) (mg/L) (mg/L) (mg/L) STATE LINE Idaho-Trent 263 148 ,82 .92 9.6 Idaho-C.I.D. 298 149 1.08 1.26 11.7 Idaho-Qeck 283 148 .85 ,62 14,2 ~ _Ph ~ Average: 281 148 .92 .93 11.8 1 U.S.G.S. 2"208" Field Data • ~ ! • • • • • ~ • • • ` i ~ ~ ~ ~ ~ ~ • • , Aquifer Cross-section Conductivity Hardness Chloride Nitrate Sulfate (micromhos) (mg/L CaC03) (mg/L) (mg/L) (mg/L) OTIS ORCHARDS Campbell-Euclid 310 186 1,12 1,24 14,5 Campbell-Mission 200 101 .86 ,84 10.0 Ln Average: 255 143 .99 . 1.04 12.2 Aquifer Cross-section Conductivity Hardness Chloride Nitrate Sulfate (micromhos) (mg/L CaC03) (mg/L) (mg/L) (mg/L) OPPORTUNITY Balfour Park 290 146 3.0 1.50 12.1 Valley Mission Park 303 167 1.5 ,92 15,1 ~ Irvin 284 151 1.7 1.10 10.4 ~ rn Average: 292 155 2.1 1.2 12,5 • • • • • ~ • • • • • ~ . ~ ~ ~ ~ • • • • • • Aquifer Cross-section Conductivity Hardness Chloride Nitrate Sulfate (micromhos) (mg/L CaC03) (mg/L) (mg/L) (mg/L) EAST CITY LIMIT (Parkwater) WbJP Substation 264 151 1,2 ,92 14.0 SCC 275 151 1,9 1.40 12.7 ~ Central Pre-Mix 240 128 1.6 1.20 11,5 ~ Milwaukee No. 2 249 136 1,9 1,40 11.2 Average: 257 141 1.6 1.2 12.4 Aquifer Cross-section Conductivity Hardness Chloride Nitrate Sulfate (micromhos) (mg/L CaC03) (mg/L) (mg/L) (mg/L) NORTH CITY LIMIT Arlington 306 147 2.7 1,4 17.0 Landfill 381 257 7,1 3,9 25.3 ' Whitworth Test 386 207 3,3 2,4 20.5 ~ ~ Average: 360 204 4,4 2.6 20.9 I • • * • N • ~ ! • • • ~ ~ ~ APPENUX B ~ SECT ION 3 WATER QUALITY, DATA F-ROM . DEPTH-SELECTIVE GROl1ND VJATER SI'TES • • • • ~ • 149 • ~ WATER QUALITY FROM DEPTH SELECTIVE GROUND WATER SITES • Ground blater ldentifier Sampiing Sampling Conductivity Dissolved Dissolved Site Number Date Oepth (micromhos) Chloride Nitrate (mq/L) (mg/L) Idaho-Trent 26/46-30D1 77-05-17 134 - •8 •9 138 - .9 .9 • 145 - .9 •9 141 - •9 }60 - 1.0 .9 185 ^ •8 •9 . • 77-10-17 138 300 .7 - 143 275 .7 - 148 270 .7 - 173 275 1.0 - 198 270 .7 - . • Idaho-CID (1) 26/46-31M6 77-10-18 129 310 1.2 - 134 310 1.1 - 139 305 1.0 - 154 285 1.0 - ~ 179 280 1.1 - ~ • • - • 150 ~ ~ WATER QUALITY FROM DEPTH SELECTIVE GROUND WATER SITES ~ Ground Glater ldentifier Sampling Sampling Conductivity Dissolved Dissolved Site Number Date Depth (micromhos) Chloride Nitrate (mq/L) (mg/L) 208 Valley 25/44-9P1 77-05-18 65 - 1.3 .88 0 Mission 68 - 1.7 1.0 Park 71 - 1.6 1.0 75 - 1.5 .88 90 - 1.4 1.0 0 77-10-13 65 310 1.0 - 70 320 5.1 - 75 325 1.1 - 100 300 1.1 - 125 310 1.2 - • Campbell- 25/45-5R1 77-10-13 78 350 1.0 - Euclid 83 375 1.1 - 88 - - - 103 275 1.4 - 0 128 250 1.0 - Campbeli- 25/45-8R1 77-10-77 103 200 .8 - Mission 108 200 .8 - , 113 195 .9 - 128 200 .8 - 153 205 1.0 - • a ~ 151 a ~ WATER QUALITY FROM DEPTH SELECTIUE GROUND WATER SITES • Ground Glater ldentifier Sampling Sampling Conductivity Dissolved Dissolved Site Number Date Depth (micromhos) Chloride Nitrate (mg/L) (mq/L) 208 Balfour 25/44-17R1 77-05-18 77 - 1.6 1.2 ~ Park 76 - 1.6 1.2 79 - 2.6 1.4 83 - 2.4 1.4 98 - 4.7 1.5 118 - 1.5 1.3 • 77-08-03 70 309 1.7 .67 74 312 1.6 .94 88 310 1.7 1.1 114 360 1.8 1.2 • 77-08-05 70 258 2.2 1.2 74 249 1.8 1.2 88 254 1.8 1.3 114 256 1.6 1.3 • 77-10-13 77 375 6.4 - 82 350 5.8 - 87 300 3.1 - 92 275 1.9 - 113 250 1.7 - i • • - ~ 152 ~ ~ WATER QUALITY FROM DEPTH SELECTIVE GROUND IrlATER SITES ~ Ground Water ldentifier Sampling Sampling Conductivity Dissolved Dissolved Site Number Date Depth (micromhos) Chloride Nitrate (mg/L) (mg/L) Milwaukee 25/43-14L1 77-05-31 54 - 2.1 1.4 A No. 2 64 - 2.0 1.4 79 - 1.9 1.4 104 - 2.0 T.4 77-10-12 56 260 1.8 - ~ 61 260 1.8 - 66 260 1.9 - 81 265 1.8 - 101 265 1.7 - + 208 Irvin 25/44-09C2 77-05-19 93 - 1.7 1.2 98 - 2.1 1.1 99 - 1.8 1.1 104 - 1.8 1.1 119 - 1.6 1.1 ~ 144 - 1.6 1.1 77-10-13 97 310 2.2 - 102 300 1.8 - 107 298 1.3 - i 122 300 1.2 _ 147 298 1.3 • • • 153 , ~ WATER QUALITY FROM DEPTN SELECTIVE GROUND WATER SITES • Ground Water ldentifier Sampling Sampling Conductivity Dissolved Dissolved Site Number Date Depth (micramhos) Chloride Nitrate (mg/L) (mq/L) Spokane 25/43,,1OP2 77-05--24 39 - 2.2 1.5 ~ Community 42 - 1.9 1.4 College 45 - 1.8 1.5 49 - 1.8 1.5 64 - 1.9 1.6 92 - 2.2 1.5 • 77-10-12 40 260 1.9 - 45 260 1.8 - 50 - 2.1 ~ 65 260 - - 95 265 1.7 - Central 25/43-14E1 77-05-26 66 - 1.6 1.2 Pre-Mix (4) 69 - 1.7 1.2 72 - 1.6 1.2 76 - 1.6 1.2 • 91 - 1.7 1.2 116 - 1.8 1.3 77-10-11 71 211 1.4 - 76 211 1.4 - f 81 211 1.5 - 96 211 1.4 - 121 211 1.4 - • • . ~ 154 ~ ~ I4ATER QUALITY FROM DEPTH SELECTIVE GROUND WATER SITES • Ground Water ldentifier Sampling Sampling Conductivity Dissolved Dissolved Site Number Date Depth (micromhos) Chloride Nitrate (mq/L) (mg/L) Land Fill 26/42-27F1 77-05-25 70 - 7.6 3.5 • 76 - 7.5 4.0 79 - 7.5 4.0 83 - 7.3 4.0 97 - 7.0 4.0 128 - 6.2 3.5 ~ 77-10-10 75 530 7.6 - 78 510 7.4 - 81 510 7.2 - 85 520 7.4 - . 100 510 7.0 - • 116 480 6.1 - Whitworth 26/43/7G1 77-10-11 111 420 3.6 - Test 116 390 3.3 - ~ 121 - 3.2 - 123 - 365 3.2 Arlington 26/43/28Q1 77-10-18 205 350 3.3 - ~ 210 310 2.6 - 215 305 2.6 - 225 285 2.3 - 235 280 2.7 - • • • ~ 155 ~ ~ APPENDIX C WASTE UTATER TREATMENT OPTIONS ~ • • . ~ • • • • 156 ~ ~ WASTE WATER TREATMEPJT OPTIONS • INTRODUCTION The choice of the most environmentally and economically sound waste water treatment system can be a difftcult decisi•on. A number of variables must be considered: a quali,ty and fate of the final effluent, capital and • operati ng costs (i ncl udi ng power consumpti on and -mai-ntenance requi rements areal requirements, quanti-ty and characteris0cs of sludges generated, as well as state and local regulatory rest-ricti-ons. This paper will dTSCUSs the available options with respect to these vari'a6les. Specifically, the following options will be explored: on-site treatment and disposal; and small (less than 1 million gallons per day, MGD) i'nterim treatment facili- • ties. Exhaustive description of these options is not feasible here, but the information presented should allow one to understand the theory, strengths and limitations of each of the systems discussed. GENERAL THEORY ~ The point of traditional waste water treatment i's to reduce the concen- tration of certain common pollutants and to disinfect the resulting effluent if human contact with the di-scharge could result in di-sease transmission. Pollutant concentrations in the i,nfluent sewage are removed by two basic mechanisms: physical separati-on and bi'ological conversion of remaining constituents. Physical separati,on most commonly involves retaining waste ~ water in a large basin and provi-ding for the removal of both settlable and floating solids. It can also involve the filteri-ng of waste water through porous media such as sand or soil. The primary aim of biological conversion is to convert organic matter to less detrimental forms. Oxygen in receivfng-waters is depleted by the ~ biological degradation of excessi-ve concentrattons of organic matter. For this reason the concentration of organic matter i,n waste waters and treated discharges is usually measured i-n terms of five day biochemical oxygen demand (BODS). Organic matter i-s primarily composed of car6on, hydrogen . and oxygen; with lesser amounts of nitrogen and phosphorus, and trace amounts of other elements. ~ Biological conversion of constituents which remain suspended in the waste water is commonly mediated by microflora and microfauna. This process can proceed in the presence of oxygen (aerobic treatment). Alternatively, oxygen may be absent (anaerobic treatment). ~ The anaerobic conversion of the major constituents is shown below in general terms: Eq. 1 Organic matter Organic acids + biomass (sludge) Y Methane (CH4) + Vrater (H20) + Biomass (sludge) ~ Eq. 2 Organic Nitrogen Y Ammonia (NH3) + Biomass (sludge) ~ 157 ~ Eq. 3 Organic Phosphates ),-Orthophosphate (P04 + Biomass (sludge) The aerobic conversion proceeds as follows: ~ Eq. 4 Organic matter + Oxyqen (0 ) )o- Ca rbon Dioxide (C02) + Water (H 20) + Biomass (slu~ge) Eq. 5 Organic Nitrogen ,o- Ammoni-a (NHKygen ) + Oxygen (OZ) s- Ni tri te (P~02 ) + Bi-omass (sl udge ) + (_02 ) V- ~ Nitrate (N03T) + Bi,omass (sludge) . Eq. 6 Organic Phosphates )0- Orthophosphates (P04+) + Biomass (sludge) . • Note that the organic carbon is converted to either methane or carbon dioxide, both of which are gasses with relatTVely low solubility in water. They are, therefore, released to the atmosphere. Although ammonia is a gas it is more soluble and remains i-n the vrater at high concentrations either as a dissolved gas or as arimonium (PJFi ions. Plitrate, nitrite and phos- phates are also soluble. Therefore, ander normal operating schemes, the • only significant nutrient (nitrogen and phosphorus forms) removal is that associated with sedimentation (primary settling) or biomass removal (sludge wasting). There are biological and physical-chemical methods for more com- plete nutrient removal (nitrification-denitrification, ammonia stripping, coagulation-flocculation, etc.), but these tertiary treatment methods are outside the scope of this paper. ~ Generally, aerobic treatment proceeds much more quickly than anaerobic treatment, therefore, aerobic treatment facilities require less reactor volume. If the process is aerobic, the essential oxygen may be provided by mechanical aeration or by algae photosynthests. Mechani-cal aeration necessi- tates increased capital costs, maintenance, and potiver consumption. ~ To retain the necessary concentration of active mic roflora and micro- fauna in the biological reactor, this active sludge may be settled from the effluent and returned to the aeration basin. Alternatively, the sludge ma.y settle to the bottom of large ponds (stabilization ponds, lagoons) and under- go slow anaerobic digestion. The required biological populations may be ~ maintained on fixed filters or rotating biological filters. The process may even be carried out in the soils of agricultu ral or forest lands irrigated with waste water. After waste water treatment, it is necessa ry to dispose of (or use) both the treated effluent as well as the resultant orqanic and inorganic ~ sludges. The organic portion of the sludge is biodegradable, and can be reduced in volume by further biological treatment. In large installations it is usually economically feasible to "digest" the sludge in separate units (anaerobic or aerobic digesters). Separate digestion facilities are seldom included in smaller treatment systems. Because disposal of undigested (raw) sludge poses both aesthetic and human health concerns, the problem of sludge ~ 158 ~ ~ production is handled differently. Often the sludge is held in the treatment facility for much longer pertods of time. Extended sludge detention times allow the sludge to undergo endogenous respi-ration (_i.e., the 6iomass con- ~ sumes itself). Thus, greatly decreased sludge volum es are experienced. This reduction in sludge volume is gained at the cost of reduced nutrient removal. Both nitrogen and phosphorus forms are released to the effluent. It should be recalled that i-n the absence of speci,al tertiary nutrient removal systems, the amount of nutrTent removal is roughly proportional to the amount of sludge created and removed (wasted) from the system.. • Sludges are generated in various quanti-ties by all treatment facili- ties. Extended aeration facilitTes, designed to minimize sludge production wi 11 eventual ly begi n to di scharge sludge i,n the effluent i f i t i s not removed in some other way. Sludges are normally conveyed to landfills or applied to croplands. Care should be taken to characterize t.he chemical • and pathogenic character of the sludge before deciding how best to dispose of it. European practices have i-ncluded composting sludge with leaves, crop residue, and organic solid waste. Sludge uses i-n the United States have included heat treatment, packaging and marketTng sludges as soil builders . and using sludges to reclaim open pTt mining operations. • Treated effluents may be handled in several ways. The effluent may 5e allowed to evaporate, discharged to surface waters or subsurface drain- fields, or applied to suita6le croplands, pastures or forested areas. A c.om- bination of these disposal methods is also feasi6le. Each method has potential environmental, health, and economic implications which should be evaluated on a case by case basis to determine the wisest choice. • ON-SITE WASTE WATER TREATMENT On-site waste water treatment refers to individual facilities which treat wastes from single households. This category includes dry, chemical; ~ and composting toilets; single household lagoons; drywells; septic tanks; and aerobic treatment units. The use of dry, chemical, and i omposting toilets, is often limited to dwellings without running water. This regulatory approach is necessi- tated by the potential occurrence of pathogens in grey water. Grey water ~ is waste water generated from baths, showers, sinks, clothes washinq, etc. Because dwel l i ngs wi th runni ng water generate substantial grey water fl ows, the installation of a system to handle these waste waters is required. Installation of a separate,dr;y system for black (toilet) wastes is seldom economically desirable. Because the use of dry systems is presently limited, they are not discussed further. ~ Use of dry wells for gr~y water disposal is a1loa~ed in Spokane County under certain circumstances. A dry well is a n excavated column constructed in a manner to prevent soil from filling the excavation, vihile still aliow- ing dispersal of the water into the surrounding soil. The drywell is not, strictly speaking, a treatment facility. It is rather an inexpensive method ~ for dispersing low strength wastes. 159 • i ~ The most common on-site treatment faci-lity is the septic tank. The septic tank consists of a container with one or sever.al compartments de- signed to provide anaerobic treatment of waste water. It should retain ~ both fl oatabl e and settl a61 e sol Tds, and provide for the di gesti on of these sludges so that pumping is required only once every two to five years. Minimum septic tank volume is 600 gallons, while average volume is about 1,000 gallons. A typical design Ts shown in Figure 1. • Fi gure 1 Typical Septi,c Tank4 I s ~:;CTI t)': P'JIiTS ! - • rf~~: . . . ; ~ • INLFT " t~ ! ' ' . . . • • • ~ _ ~ , . OVI'I.ET F SCUm GIQUID L . DIGESTIXG Sll•PGF. • Within the septic tank the suspended organic matter is converted to ~ organic acids. This "produces a somewhat offegsi've anaerobic effluent well suited to aerobic treatment by soil bacteria".6 After extensive field and laboratory testing of septic tanks, Ot►is et al note "septic tanks can be characterized as producing an effluent very high in BOD and total susoended solids. The survival rate of fecal coliforms is also h~gh. Median values of the field units vary between approximately 90 mg/1 and 290 mg/1 for BOD5 ~ and 35 mq/1 and 135 mg/1 for total suspended solids." Although individual septic tanks vary widely in efficiency and efflfuent quality, Table 1 sum- marizes available data characterizing anaerobic septic tank effluent. Table 1 Septic Tank Effluent Characteristics • Effluent Characteristics Percent Removal BODS (mg/1) 10.5-150 30-50 TSS (mg!/1 ) 50-135 50-70 ~ NH -N (mg/1) 25-35 N02-N (mg/1) 0.2-0.5 NO -N (mg/1 ) 0.01-0.5 Orianic - D (mgJl) 5.6-10 Total N (mg/1 ) '30-50 0-35 PO -P (mg/1) 20-35 ~ Tdal P (mg/1) 8-40 0-25 Fecal Coliforms (#/ml) 1300-5500 - Adapted from references 6, 7, and 8. 160 • ~ Nitrogen in septic tank effluent Ts about 80 percent amrnonium and ZO percent organic nitrogen. Although ammonia is effTCi-ently retained by ~ soil particles, much of the ammonium i's nttrifi-ed to nitrate (NO ) by soil bacteria. Nitrate is highly mobiie in drainfields and poses a pirticular threat to ground waters. The conversion and flux of nitrogen forms is di;scussed below. The primary function of a septic tank is to provide an effluent which • will not clog or overload the drai,nage field. For this purpose they function well with minimal maintenance, provided tliey are pumped as required to pre.-• v ent the wholesale flushing of solids to the drainfield. Typically, the collection system, septic tank and draTnfi•eld operate on gravity flow elimi- nating the necessity of oumps, which additionally decreases maintenance and operation costs. • Recently the use of aerobic units to replace septic tank functions has gained some credence. There are two basic types of aerobic units: batch- aeration systems and continuous flow systems. A typical batch-aeration system consists of a single tank which acts 6oth as an aeration chamber and settling chamber. A centrifugal 6lower injects air into the tank for 18 hours and then shuts off early Yn the morning to allow the tank solids to • settle. A submerged centrifugal pump discharges the supernatant from the tank after a 5-hour settling time and the cycle repeats. The continuous flow units typically contain a trash trap for primary solids which acts as a small septic tank. This is followed by an aeration chamber with a mechani- cal aerator and a final settlinq chamber with a gravity sludge return. These units operate in a manner si'milar to extended aeration package plants. ~ A typical continuous flow unit is shown in Figure 2. Figure 2 4 Typical Continuous-Flow Aerobic Unit ~ rr,s IIecTiurr PORTS 4. • ~ • • - . . . , . INLET T T OUTLET • : SC l11 : r t0 OI5INFECT10N I • ~ Td `K SETTLf4C PRE • AERATIOY . , SE1'TL[YG . ' SLImGE ' RE'CURY . , . . - • . . • . - `-AIA DIFEUSOH ~ Problems have been experienced with aerobic units. Otis, et al6 note, "Aerobic units are capable of much higher degrees of treatment than ~ septic tanks, but periodi4 upsets cause greater va riabTlity in effluent quality". Bennett, et al suggest that aerobic systems which are typically ~ 161 ~ . designed to retain waste waters for one to two days may be underdesigned in that they fail to handle waste water surges. Another reason for disappoint- ing performance is homeowner neglect. Both pumps- and aeration uni,ts must be ~ serviced and solids must be removed more frequently than is necessary with septic tanks. The increased servicing costs, power costs and higher capital costs makes the aerobic units even less attracti've. Rower consumptVn for most units ranges from 3 to 7 kilowatt hours. per day. Otis, et al make the ~ following cost comparison. Table 2 Cost Comparison: Septic Tanks, and--Aerobi•c Units* Septi c*Tank . Aerobi c Uni t • Equipment Costs Tank, control panel, etc. (25 yr, life) $200 $750 Aeration equipment (10 yr, life) 150 Installation ~ Operation Costs (Power) 275 350 h1aintenance Costs (including purnping) 36/y r. Total Annual Cost -54 . 203 *Amortized at 8 percent, 1973 dollars. • As these authors note6, "The computation of total annual costs show that aerobic units become competitive with septic tanks, only i,f surface discharge is allowed." Effluent quality is improved over septic tank ef- fluent. It is doubtfui, however, that suffi,cient effluent quality is maintained to prompt regulatory agenci-es to allow su rface discharge. State law (WAC 248-96-050) spectfically prohibits the di,scfiarge of effluent from ~ on-site treatment facilities to sugface waters or upon the surface of the ground. Effluent BOD is reported ranging from 25 mg/1 to 55 mg/1 with a mean of 30 mg/l. Tot~l suspended solids removal is no better than that achieved with septic tanks. Effluent fecal coliform concentrations are much lower, but still above levels typically allowed in discharges to sur- face waters. ~ Because the option of discharge to surface waters is closed to septic tank effluents, use of a satisfactory drainfield is essential. The drain- field distributes the effiuent to the soil where aerobic soil bacteria de- grade the organic matter in the effluent. The presence of very porous oils, poorly drained soils or shallow ground waters can limit or exclude ~ the use of drainfields and therefore septic tanks. Highly porous soils (sands and gravels) allow waste water to pass . quicl:ly through the biologically active soil fractions and percolate to ground waters with relatively little renovation. Poorly drained soils, particularly those with substanti'al clay fractions, pass waste water slowly . • and can clog quickly. Soils with interm edi'ate permpability (sandy loams and silt loams) provide both adequate retention and adequate permeability 162 , ~ to both percolate and treat waste waters. Historically, the percolation test has been used to determine the adequacy of soils for drainfield place5 10 11,12 ~ ment. But reliance solely on thi~s criteri'a Has 6een seriously questioned. Generally, however, it is posst6le to construct adequate drainfields in medium porosity soils of suffici-ent depth arhich lie on relatively level terrain. Sizing and construction techniques are of great importance if a drain,`ield is not to clog and ultimately fail. Scarring and compressing trench walls can drastically lower inTtTal perm eabilTty. In addition, or- • ganic overloads (usually caused by Tnadequate si-zing) create anaerobic con- ditions in the percolation bed. ThTS quickly leans to bacterial build up r! whi ch further 1 owers permeabi 1 i ty. I'n addi ti on, anaerobi d conversi ons re- sult in the precipitation of sulfides of tract metals (particularly FeS) which further clogs the drainfield. Substantial treatment of septic tank effluents occurs in the soil •column as the waste water percolates through the soil. Aerobic soil bac- teria efficiently degrade organic matter. I'f anaerobic conditions develop, organic degradation i's retarded and leads to the clogging problems discussed above. The soil particles efficTently filter suspended solids, and the organi c fracti on of these sol ids i s al so degraded 6y soi l bacteri a. • Nutrients are present in ioni,c form in septic tank effluent. They are also degraded from organic to ionic form by the 6reakdown of organic matter. Phosphates are retained in soi-ls 6y a combination of adsorption, ion ex- change, and precipitation reactions. SoTI-phosphate movement can, however, take place in old or overloa8ed systems. • Nitrogen forms are involved in a rather more complicated systen of bio- logical and chemical reactions. As noted previ°ously, most of the nitrogen in traditional septic tank effluents i's present as ammonium. Aerobic septic tank effluents, on the other hand, contain primartly nitri'te. Nitrate (an anion) is very mobile in percolation waters, while ammonium (a cation) is retained strongly by soil partTCles. A group of aerobic soil bacteria (the ~ nitrifiers including Nitrosomonas, Nitrobacter;'Nitrococeus, etc.) can efficiently oxidize arrmonium to nitrate freeing it to move with the perco- lation waters. This biological conversion proceeds much more quickly when soils are warm and biological growth rates are high. Theoretically there are two routes by which nitrogen may be at least temporarily removed from the drainage system waterso (1) If local anaerobic microhabitats exist in the drainfield, nitrogen may be denitrified to nitrogen gas or gaseous nitrous oxides. (2) If the root zone of overlaying vegetation penetrates the drain- field, nitrogen in both nitrate and ammonium form may be taken up by the vegetation and recycled in the topsoil. Although jittle information appears to be available on the efficiency ~ of these mechanisms, it is probable that they are much less effective in reducing drainfield nitrogen than they are in reducing the nitrogen content of waste waters applied to spray irrigation projects. This is apparent for several reasons. First, drainfield effluents are injected 14 to 36 inches below the soil surface. This places them out of the most biologically active soil horizon, the topsoil. In addition, the root zone for many cover ~ crops (i.e., grass) does not extend to these depths, thus vegetative uptake is diminished. Finally, and probably most importantly, drainfield applica- tions are not careful ly control l ed and typical ly cover crops are not har- a 163 ~ ~ vested. Thus, neither are opti'mal conditi,ons for denitrification main- tained, nor are the nitrogen forms taken up by ttie cover crop ultimately removed from the system. • Soil systems do not generally retain ani~ons includTng, in addition to nitrage, chlorides, sulfates and 6lcarbonates. These anions move with the d rainage waters and pose a potentlal for ground water contamination. If drainfields are designed and operated correctly there is virtually ~ no odor. If, however, drainfi,el ds are overl oaded, anaerobi c effl uent can surface and create substantial odor pro6lems. There are three major types of drainfi%elds: the traditional narrow trench systems, mound systems, and evapotranspiration (ET) systems. The mound systems are used when ground water exists close to the soil ~ surface. The absorption field Ts raiNsed a6ove the natural soil level by using clean, medium sand. This renoves the seepage trench from wet, slowly permeable subsoil and spreads the application of effluent to a greater area. Mound systems may be designed to Tnduce evapotranspiration. They gin there- fore be considered a special type of ET system. Studies in Oregon found mound disposal systems acceptable ff a public agency at the county level or ~ below had responsibility for all operation and maintenance of the systems and if area was reserved for the construction of a replacement bed. A modification of the narrow trench system is specified2 for use in Spokane County. Dispersion pipes are laTd Tn trenches 18 to 36 inches wide filled with crushed rock. The di-stance between the top of the pipe and • the finished grade ranges from 14 to 36 i*nches. Construction of drainfields on lands with greater than 15 percent grade are not allowed except on a case by case basis. Location of piping below the frost line in northern climates can place seepage below the biologically active soil mantle and minimize evapotranspir- • ation. Failure of drainfiel.ds is usually 1 inked excessive loading due to insufficient sizing of the drainfield, failure to consider specific soil conditions or compaction of trench walls. Overapplication leads to anaerobic conditions. Anaerobic slimes, ferrous sulfide precipitation and sedimenta- tion further degrade drainfield conditions. These problems can be overcome by operating techniques including drainfield systems which allow alternate ~ loading and resting of the soil. INTERIM SEWAGE TREATMENT FACILITIES Aerobic, secondary treatment plants have two major advantages over ~ on-site sewage disposal systens. GJaste water is centrally collected and treated and effluent quality is improved making surface or subsu rface water discharge less objectionable. These advantages are counter-6alanced by disadvantages which include increased complexity and pourer consumption. It is important that small treatment plants be both dependable and relatively simple. P1ost problems encountered in small treatment plants a re related to ~ the lack of skilled and knowledgeable maintenance and supervision. In addition, small plants a re served by shorter sewerage lines in homogeneous 164 ~ , ~ developments. These plants are therefore subject to 6oth hydraulic surges and waste load shocks. • Jones15 notes four important characteri'sti,cs of a smal 1 setiyage treatment plant: 1. P1 ant operati on shoul d be rel i-a61 e wi-thout conti*nuous ski 11 ed supervision, 2. Plant must operate effTCiently under a vari*ety of flow conditions, • including organic and hydraulic shock, 3. Plant should not generate large volum es of solids for subsequent disposal, and 4. Plant should not generate excessi,ve odors. ACTIVATED SLUDGE SYSTEh9S • Early in this century, Briti-sh researchers noted that a sludge de- vel oped i n aerated, cl ari fi ed raw sewage. Adcii'ti-onal 1y, they noted that if substantial amounts of thi-s sludge were added to waste water, the organic content of the waste water decreased rapidly. Later, i't was confirmed that this sludge consisted of a complex communi,ty of bacteria and other micro- ~ organisms which formed a flocculant sludge whi-ch actively consumed the organic constituents of sewage. Treatment systems which make use of this "active sludge", which is mixed with i,ncoming waste waters in an aeration basin, are referred to as activated sludge systems. In all activated sludge systens, thi-s biological sludge is settled ~ from the aeration basin effluent and returned to tiie aeration basin to ' treat additional incoming waste water. A portion of this settled sludge is "wasted" from the system. The ratio of incoming organi-c waste to ttie amount of activated sludge in the aeration basin influences the rate of organic degradation. This ~ ratio is often referred to as the food-to-mi,croorganism rati-o and is ex- pressed in lb, of incoming BOD per day per pound mi-xed liquor volatile suspended solids (MLVSS) fn th~ aeration tank. ThYS ratio is strongly related to a second operational parameter: h1ean cell residence time (A„). A is the number of days which an average microbial cell is retained in' tfie systems prior to wasting. It is determined by di-viding the mass of , MLVSS in the system by the mass of s3:udge volatfle soli-ds wasted daily. These parameters must be regulated by the operator to maintain good control of the process. The primary means of regulating the process is by careful control of sludge wasting rates. Perhaps the most common symptom of process upset is sludge bulking. ~ In its most general sense, sludge bulking refers to the failure of acti- vated sludge to settle properiy in the secondary clarifier. This can, in turn, lead to excess suspended solids concentrations in the effluent which may exceed permit limitations if the plant discharges to surface waters or plug drainfields if subsurface discharge is employed. I'n addition, h1LVSS concentrations in the aeration basin may decrease, further aggravating the • situation. Sludge bulking can occur for a number of reasons including in- , 165 ~ appropri ate food-to-mi croorganfsm rattos, shock 1 oadi,ng, i nsuffi ci ent nutrients in the raw waste waters, anaero6ic condttions in the secondary clarifier, or excessive mean-cell resiaence ti-mes. . Table 3, adapted from Tehobanoglous' work16, gives typical ranges for the operational parameters discussed above. Additional parameters are included. Among these are volumetri-c loading and hydraulic detention time which allow one to estimate the size (volume) of aer.ation basin required for a given appl ication. ~ Table 4 provides compa rison of effluent qvalfty from activated sludge and septic tank options di-scussed her-e. I't is clear that properly operated interim waste water treatment plants provi-de an effluent quality much im- proved over septic tank effluents. Consi'derable cau ti,on should be exercised in reviewing the treatment efficTency tables as Tndividual applications show wide variations in effluent quality dependi-ng on-design, operation, incoming ~ waste water cha racteristics, and other varia6les.. CONVENTIONAL ACTIVATED SLUDGE Although the conventional actfvated sludge process is not commonly employed for small plants, several modi,ficati-ons of this process a re often ~ used. These modifications lend themselves to being housed in what are often termed "package treatment plants", although the term "fact6ry-fabricated plants" might be more appropriate, since the process and detention times should be selected specifically for the process, flow conditions, and sew- age strength in any given location. s • A simplified flow-chart of the conventional and modified activated . sludge processes is presented in FYgure 3. In addition to the unit processes noted in Figure 3, incoming sewage is communuted and passed through a grit chamber where heavy, abrasive solids are removed. Secondary settled sludge Ts often routed to a sludge thickened ~ to decrease the si,ze of sludge pumping and handling appurtenances. Digested sludge is often dried using vacuum filters, centifuges screen presses or sludge drying beds to decrease the volume of disposed sludges. Effluents are chlorinated prior to surface water discliarge. The number of unit pro- cesses, the care required to mafntain process stability, and the necessity of digesting and disposing of large volumes of sludge make conventional ~ activated sludge an unattractive option for small plants. EXTENDED AERATION The extended aeration modification eliminates the primary settling requirements and reduces considerably the production of excess (wasted) ~ solids which makes it a desirabie small plant option. Waste water is screened, communuted and then passed to a relatively large aeration basin where it is heid and aerated for approximately 24 hours (compare to a typical detention time of two to six hours in conventional activated sludg e). The active sludge is then settled from the aeration basin effluent and returned to the aeration basin. P9ean cell residence times are greater than in other acti- ~ vated sludge options. This leads to the self-digestion of sludges within 166 ~ Ir 1r i ~ ~ ~ ~ • • • • Table 3 TYPICAL DESIGN DATA FOR ACTIVATED SLUDGE PROCESSESa PROCESS I TEM CONUENT IONAL CONTACT EXTENQED HERR1'ED OX I DAT I ON COM PLETE-MIX STABILIZATION AERATION LAGOONS DITCH Mean cell residence time, 6-12 6-12 20-30 10-30 20-30 9, days . Food-to-microorganism ratio,FjM 0,2-0,4 (0,2-0,5)b 0,05-0,15 0,05-0,2 0.03-0,10 Ib. BODfIb, MLUSS/day Volumetric loading 50-100 30-80 10-25 60-70 10-20 ~ Ib. QOD/1000 cu. ft.fday ~ Temperature coefficient, 9 1.0-1,02 1,0-1.02 1.06-1.09 1.06-1,09 1.06-1.09 Mixed liquor suspended solids 2000-5000 1000-3000b 3000-6000 2000-3000 3000-8000 MLVSS, mg/l (4000-10000)c Volatile fraction of MLUSS 0,7-0,9 0,6-0,9 0,6-0,8 0,6-0.8 0.6-0.8 Hydraulic detention time 2-6 0,3-0,5 b 18-36 0.5-6 0,5-4 9, hr. (3-6)c (days) (days) Recycle ration 0,25-1.0 0.25-1.0 0,5-1.5 0.25-0.75 0,25-0.75 a) From Tchobanoglous, 1975. b} Contact unit. c) Solids stabilization unit (sludge aeration tank) Tabl e 4 Estimated Performance Data for Alternative UJaste lJater Treatment Processes~ Constituent SS -BODS COD N N1i 3 P Incoming Waste Water . 225 200 450 40 25 10 Eff1uent From Treatment Process -A Activated Sludge ~ Conventional 20 15 90 25 20 7 Extended Aeration 20 15 90 30 2 8 Contact Stabilization 20 15 90 25 20 1 Septic Tanks 50 145 30 25 $ lAdapted from Tchobanoglous (1915)16; under ideal conditions; values expressed in mg/1. r ~ ~ s ~ ~ • • • • ~ ~ ~ : ~glLrt 3. SIVd6e QpLloIIS Converrtional hczivaied' S1-adga TaflVirnt i: fluen~ Aera~{;,n ~~ccndar,~ Settling, ~:as!'-i Sett? ing A • . v g~ T Ext 8 Z'I121 . . Sludge ~ Waste Acti-rated Slcdbe Dig8stion , - . . . . ~ • Diizested Sludm ~ , . . . . - E.~cter.dad Ae."ation ~nfl•nt . . . . . . . . ~ - . Effl~~nt s Seco~ar~,~ _ ~ Aeration Settlir.g Basir. . ~ T~ c' y'1 ` 2 73 2 aILl d ~ o J N ~1 ► ~ I 1 ~ , • ~ ?"-ar~WCi..i va A.-.r S.lvated ~ . ~ - . . Cer,~ac~ St _ Ln Contac" ~ec onda: v ~ Tan!c e - tl~^- . ' . A S- stc- -A c-r,.~~^ 031 ~ J..11C63 tn _r JC b " ~ 169 ~ the aeration basin (e.g., "endoc-~enous respi,ration"), usually eliminating the need for external sludge di,gestion faci-l Tties. Thi-s 1 eads to a ful ly ni trif i ed effl uent wi th vi,rtual ly no nutri-ents removed. Extended aerati on ~ sl udges possess mediocre settl i-ng characteristTCS. Bul king and sol ids loss in the effluent are potential problems. Solids are typTCally pumped from the final clarifier daily or every other day. These sludges are raw and ~ thus pose a public health concern. They are often handled like septic tank sludges. Based on theory of operati,on, extended aeration is very similar to the ! aerobic septic tank process which was earlTer descrTbed. Extended aeration faci-lTties are relatively immune to shock loading as long aeration basin detention times tend to provi-de hydraul ic and or- ganic load equalization. Power requirements are somewhat greater than for conventional activated sludge due to the extended aeration times required. ~ The plant itself has little odor potentTal ht]t the disposal of sludges may pose potential odor problems. The terms "extended aeratTOn" and "package treatment plant" are essentially synonymous in Spokane County; and extended aeration facilities are vridely used for subdTVisi-ons, apartment compl.exes, condominiums and-i ! small, rural towns. Effluents can be dTSCharged to either surface waters or subsurface drainfields, and both options are employed in Spokane County. The presence of a fully nitrified effluent (e.g., all, o r nearly all, of the nitrogen in the effluent is present as nitrate) may cause concern when subsurface discharges may pose a threat to ground tivaters. f CONTACT STABILIZATION Contact stabilization is a modification of tfie activated sludge pro- cess which attempts to minimize the tim e which sewage is retained in the treatment process. The theory responsT6le for this modification holds that the stabilization of organic wastes Ts accomplished in two essentlally discrete steps. First the suspended and dissolved organic matter in the waste water are absorbed by the sludge floc. Su bsequently, these absorbed organics are oxidized by the organisms a nd converted to both energy and cellular material. In the aeration basin of conventional activated sludge systems both processes occur organic material is a6sorbed, oxidized and new cells are formed. Contact stabilization isolates these processes. Du ring ~ the "absorption phase" comminuted colloidal, finely suspended, and dissolved organics are absorbed to the activated sludge. This takes place in a contact tank (see Figure 3). The sludge and absorbed organics a re then settled from the effluent flow and routed to a"sludge _.aeration tank". Nere the thickened sludge is aerated for three to six hours. Accumulated o rganic matter is oxidized and metabolicaily assimilated. Sludge cells multiply. The sludge ~ is then returned to the contact tank to abso rb mo re organics. The treated sewage is retained for only 2.5 to 3.0 hours in the system. This compares to an overall detention time of ten to eleven hours in con- ventional activated sludge, and 24-26 hours in the extended aeration pro- cess. Because the length of time the flow must be detained dictates the e size of the units involved in the treatment process contact stabilization 170 ~ ~ minimizes overall installation costs (i.e., capital costs). This makes the system attractive to the developer, but the use of contact stabili- zation has been resisted by regulatory agencies in the Spokane area. ~ Reasons for this resistance include the lack of operators famil iar with the process, substantial sludge production, the number and complexity of unit processes involved, and an inclination that contact stabilization is a sen- sitive process which requires constant skTlled attention. A properly designed and operated contact stabilization unit would ~ have the advantage of somewhat improved nutri,ent renoval s, due to i ncreased sludge production. However, the difficulties posed in the long-term operation of this process make chances of early acceptance of this option minimal. SUMMARY , The use of interim treatment plants provi•de for central collection and treatment of waste water. These systems are not consi-dered to be perm anent and may be replaced in the future by municipal sewage treatment systems or more elaborate small systems. In addition effluent qual ity is improved over septic tank systems. These posTtive attri6utes are counterbalanced ~ by increased complexity and energy consumption. Slu dge disposal may involve additional facil ities and costs. If effluents are discharged to subsurface drainfields lvadings are limited, by a Department of Ecology directive, to four gallons per linear foot of draTnage pipe. Nutrient removals are modest. Although tertiary nutrient removal systems (activated carbon, chemical flocculation, ammonia strippi,ng, nitrogen-denitrification sch enes, ~ etc.) may be added to minimize effluent impact on the receivirg waters (whether surface water or ground water); their increased costs and complexity makes their application to msall systems unfeasible at this time. 1 . . ~ ~ ~ 171 ~ FOOTPJOTES l. Troyan, J.J., "Alternative Systems The -Oregon Experi,ence", in Proceedings of Northwest On-Site'Waste Water'Disposal'Short Course ~ D.A. Lenning, Editor, IrJashi,ngton State Department of Social and Health Services (1975) pp 33-37. 2. Spokane County Health District; Rules and Regulations for Sewace Disposal Systems, amended Title l, Chapter 4, (1975)0 i 3. Pickett, E.M., "Evapotranspir-ati-on and-Individual Lagoons", in Pro- ceed i ngs of Northwest On-Si te 6-Jaste -Water Di sposal *Stiort Course, D.A. Lenning, Editor, Washington State Department of Social and Heal th Services (1975) pp 108-118. 4. Bennett, E.R., Linstedt, K.D., and J. Fulton, "Comparison of Septic • Tank and Aerobic Treatment Units: The Impact of Waste Water Variations on These Systems", in Plater Pollutton Control in 'Low Density Areas W:J. Jewell and R.- Swan, Editors, UnTVersity of 'Vermont, University Press of New England; fianover, New Hampshire ('1975) pp 95-108. 5. McGauhey, P.H., "Septic Tanks and Their Effects on the Environment", ~ in Water Pollution Control in Low Density Areas, W.J. Jewe11 and R. Swan, Editors, University of Vermont, University Press of New England; Hanover, New Hampshire (1975) pp 43-53,., 6. Otis, R.J., Hutzler, N.J. and W.C. Boyle, "On-Site Householid Waste Water Treatment Alternatives - Laboratory and Field Studies", in Water Pollu- t tion Control in Low-Density Areas, W.J. Jewell and R. Swan, Editors University of Vermont, Uni-versity Press of New England; Hanover, New Hampshire (1975) pp240-265. 7. Ha11, P1.W., 1975. "A Conceptual MModel of Nutrient Transport in Subsur- face Soil Systems", in Water Pollution Coritrol in Low Density Areas, ~ W.J. Jewell and R. Swan, Editors, University of Vermont, University Press of New England; Hanover, New Hampshire (1975) pp 55-64. 8. Laak, R., 1974 "Nitrogen and Phospho rous Removal in a Septic Tank and a Lagoon, Experimental Investigation of Nitrogen and Phosphorus Re- moval at the University of Cdnnecticut Research Station." ` 9. Otis, R.J., W.C. Boyle, J.C. Converse, and E.J. Tyler, 1977. On-Site Disposal of Wastewater Flows. U.S.E.P.,4., Technology Transfer. 10. Bouma, J. 1975. "Improved Field Techniques for P1easurem ents of Hydraulic Properties of Soils", in Water Pollution Control in Low Density Areas ~ W.J. Jewell and R. Swan, Editors, University of Vermont, University Press of New England; Hanover, New Nampshire (1975) pp 181-189. " 11. B. Zulauf, A., 1976. Soils Characteristics, Su rveys and Maps", in Proceedings of Northwest On-Site Waste lJater Disposal Short Course, D.A. Lenning, Editor, Washington State Department of Social and Heal th ~ Services (1975) pp 38-46. 172 ~ ~ 12. Laursen, A. 1976. "A Critical Analysis of the Percolation Test", in Proceedin9s of Northwest On-Site Waste Water Disposal Short Course, D.A. Lenning, Editor, 6Jashtngton State Department of Social and Health ~ Services (1976) pp 49-52. 13. Hal l, P1.W., "A Conceptual Model of Nutri,ent.Transport in Subsurface Soil Systems", in Water Pollution Control in Low Densit.y Areas, W.J. Jewell, and R. Swan, Edi-tors, University Press of New England, Hanover, New Hampshire, (1975) pp 55-64. ~ 14. Troyan, J.J., "Alternative Systens - The Oregon Experience",- in Water Pol 1 uti on Control i n Low Densi ty Areas, W.J. ,Jewel 1 and R. Svran, Editors, University of Vermont, University Press of New England; Hanover, New Hampshire (1975) pp 371-388. ~ 15. Jones o P. N. ,"Low Cost lJaste ItJater Treatment for Smal 1 Corrmuni ti es" , in l•later Pollution Control in Low Density Areas, W.J. Jewell and R. Swan, Editors, University of Vermont, University Press of Netiv England; Hanover, New Hampshire (1975) pp 389-427. ~ ~ ~ ~ • • ~ 173 9 EXTENSION OF TIME REQUESt SPOKANE COUNTY PLANNING DEPARTMENT SUgDIVISION ADMINISTRATOR ' FINDINGS OF FACT File No: PE-1168-78 Name: MIDILOME ADDITION l. That the pre]iminary plat was originally approved by the Hearing Examiner Cornmittee in a public hearing on April 7, 1977. 2. That the zoning has been reclassified from Agricultural to R-1. 3. That the Comprehensive Plan is designated as Urban and is within the PSSA area. 4. That since the original approval, the applicant has finalized five additions of the original preliminary plat, the most recent being Midi lome 4th Addition containing 65 lots, on April 16, 1986. 5. That no additional conditions have been recommended by other County departments and agencies. 6. Public notice was given as required by the Spokane County Subdivision Ordinance and no comments were received from the public. • DECISION Based on the foregoing findings, the Subdivision Administrator APPROVES an Extension of Time for 3 years to April 1, 1989, subject to the conditions based upon Extension of Time guidelines Subsection 1 of Chapter 3, Section "Gp, Spokane County Subdivision Ordinance. ► DOUGLAS . ADAMS Subdivision Administrator P 55? 560 197 RECEIPT CERTIFIED MAIL r,o iNwh....,;E covEwGL PaovInEo NOT fOR IfiiEHNAiIONAI MAII (See Reverse) to ~ ~ ~ S 8t ~ n Z P oc3e . , yK~, ~ ~ti5~dl.~f' S l.t'm}Ied FBe Speaal Del,very Fee ~.•;urrt=~c~~:e•~~~~ SnuWcn:~ to wrwn, and nate Defwere.j ~ Retum Receipt showing to wh„r,• ~ Oate. and Adckess ot [)elivery ~ TOTAL Poslage an4 Fees _ I ~ • / C ~ u°. cn - a _._.r P 55? 560 176 . . RECEIPT FOR CE, IED MAIL NO INSURANCf CO'VERAGE PROYIQED N01 ipq IMTERNA710NA1 YAII (Ses Reverse) o . di ~ ~ ~ • m ~rqe! n No / j'(~ c..~l d P t and ZIP Cod : `.E'~' 1rPC FFC 5peual Dehvery Fee Neturr c4cLt-101 StWwin4 wru;m and Gate Deaivereij 4co Retum ReCept Showrng to whqm. ~ Oate, and Address of Oelivery m j TOTAI Poslage and Fees _ ~ g PoStmark or Oate r~ E ~ 0 ~ ~ a , P. 557 560 175 RECEIPT FOR CEF ED MAIL w WSUPAKF cwAw►cL rRavIUn qITT FUA INIERNAiN]NAl 1AAlt (See Reverse) nt 10 ' ,.r Whewiv F . rt a~~ Ko/l, `p ~ ~y[~1 ~ 1L=1 d P te nd ZIP t6 / . ao zi P0. 5 Cetiiied Fee Sf:n~ri.tl pe=livory Fee Rastntted Oeuvery Ft-e Retum ReCeipt shOwinq ro whom and Qate Deiivered ~ Retum Recent sfiowm9 to v- Date, and Address ot De6very m ~ Tp-A: r~„~,~:;.a~~ ,z,-,~~ E:•c~ - ~ ~ ,•f ' . E 0 ~ I N d • 5; ~_c,r-,;>i~:e ~t~~r, ~:,~~d 2 when additional aervices ere der--•d, end complete Il@Tb 3,. a Put yuur adiirtss in ' RETURN 10' Space art the reverse side. Failure to i. s will prevent this cerd fram being retumec iu. The return recei t fee will provide vou thes ryp(~$ of Ine erson delivered to and thv date of deliver .,.,r additional fees the followin setvice9 are avuifable. onsu t postmnster la(Tees an c ec ox er or addrtianal servics(s) tequeste~. i. i--i Show to whom delivered, date, and addresaee's address. 2. ~ Restricted Oelivery • (&ara rhurge) (E.rtrct churgt) 3. Articie Addressed to: 4. icle Number 7 :46 / -~s- T e of Service: ~ p ~ Rcg{stered ❑ IRSUred CertifieC ❑ COD ExPmse Mep ❑ RetumRn fo Me{cha.-se Alweys obtain slgneture of addrafsee or egent ar►d qATE DELIVERED. 5. Signeture - Addressee 8. Addressee's Address (ONLY !f x reyuCated unrl fic paid) 6. Si La - A9 v ~ 7. Date o Oo ivery d~ - PS Form 3811, Apr. 1989 DOMESTIC RETURN RECEIPT F , • h- \ . 9-88 HEC Findings PE-1168E-78 Page 1 SPOKANE COUNTY HEARING EXAMINER COMMITTEE FINDINGS & ORDER DATE: September 22, 1988 ~ RE: MIDILOME 5TH ADDITION - Change of Conditions P E - 1 1 68 E - 7 8 ZE-13-78 R-1 zoning 1. The proposal is to realign the southerty road serving the preliminary plat to avoid creating double fronting lots and the potentiai future creation of an arterial on 40th Avenue. No zone change or general lot size change is proposed. The redesign has two fewer lots than the original proposal. 2. Located on the west side of Pines Road and the east side of Bowdish Road and approximately 930' feet northeast of the intersection of the Dishman Mica Road and Bowdish Road in Section 33. Township 25 North, Range 44 E.W.M., Spokane County, Washington. 3. We find that the item has been properly advertised in accordance with state and local regulations. 4. We have considered and evaluated the information and conditions contained in the Planning Report for this proposal. 5. The Comprehensive Plan designates this area as Urban which is in keeping with the redesign and original proposal. 6. That we believe the proposal is oompatible with existing uses in the area described in the Planning Report and explained by the sponsor during the hearing. 7. We note that area-property owners did not speak to the project. There were concems of the public which were explained satisfactorily during the course of the hearing. 8. We find the provisions of the State Environmental Policy Act have been oomplied with. 9. We approve the recommended changes of conditions of approval relating to Engineering Conditions #4 and #11 in the Planning Report. The National Flood Insurance Program does not apply to this project and one lot will utilize Pines Road as aooess. 10. The committes finds the requested change of the conditions to be a better design for the neighborhood. DEGlS10N AND ORDER . VOTE: 2•0 to epprove. , s r . ~ 9-88 HEC Findings PE-1168E-78 Page 2 tN REFERENCE TO THE ATTACHED FINDINGS & ORDER. THE HEARING E AMINER COMMITTEE ADOPTS THE FOLLOWING CONDITIONS OF APPROVAL ATTACHED HERETO: PLANNING DEPARTMENT C4NDITION5: 1. That the below listed conditions of ali Departments and Agencies are binding upon the applicant, owner(s) of the property, heirs, successors or assigns. 2. The preliminary plat of record approval is for the property legally described in the application for this proposal. 3. That the Final Plat be designed substantiaily in conformance with the changed preliminary design as legally descxibed and advertised. No increase of density or - lot number shall oocur without a new application submittal and approval. 4. The Spokane County Subdivision Administrator shall review any proposed Final Plat to insure oompliance with the Findings and Conditions of Approval. 5. That the preliminary plat be given conditional approval for three (3) years to October 1 st, 1991. The applicant may request an Extension of Time by submitting a written request forty-five (45) days prior to the above expiration date. . 6. Upon filing the Final Plai the zone change of the Final Plat area shall be finalized and the existing Agricuttural zone classification shall be changed to R-1. 7. That a Final Plat name be indicated before the final plat is filed; such name to be approved by the County Planning DirectodDesignee. 8. That appropriate road names be indicated on the plat. 9. That appropriate utility easements be indicated on oopies of the proposed final plat. Written approval of said utility easements by said utility companies must be received with the submittal of the final plat. 10. That 3 current certificates of title be furnished the County Planning Department prior to filing the final plat. 11. That the following statement be placed in the final plat dedication: "No more than one dwelling structure be plaoed on any Lot nor shall any !ot be further subdivided for the purpose of creating additional lots, ownerships, or building sites without first filing a replat." 12. The final plat map shall indicate by a clear dashed line, the required setbacks from all private, tract x or publlc roads. the dedication shall contain a statement that: "Side yard and rear yard setbadcs shall be determined at the time building permits are requested. 7he setbacks indicated on this subdivision may be varied from if proper zoning approvals are obtained." 9-88 HEC Findings PE-1168E-78 Page 3 13. That a plan for water facilities adequate for domestic service and fire protection be approved by the water supplier, fire protection district, Spokane County Building 8 Safety Department and County health authorities. The agencies will certify on the WATER PLAN, prior to the filing of the final plat or any phase of the preliminary plat that the plan is in conformance with their respective needs and regulations. The WATER PLAN and certification will be drafted on a transparency suitable for reproduction and be signed by the plat sponsor. 14. The purveyor will also certify on the Water Plan that appropriate contractual arrangements and schedule of improvements have been made with the plat sponsor for construction of the water system in aocordance with the approved WATER PLAN. The time schedule for improvements will provide for completion of the water system and inspection by the appropriate health authorities prior to application for building permits within the final plat. The arrangements or agreements will include a provision holding Spokane County and the purveyor harmless from claims by any lot purchaser refused a building permit due to the failure of the plat sponsor to satisfactorily oomplete the approved water system. 15. The final plat dedication will oontain the following statement: "The public water system, pursuant the WATER PIAN approved by County and State Health authorities, the local fire district, County Building & Safety Department, and water purveyor, will be installed within this plat, and the subdivideNsponsor will provide for individual domestic water service as well as fire protection to each lot prior to sale of each Lot and prior to issuance of a building permit for each Lot." 16. That no building permit will be issued for any lot within the Final Plat until certified by a Washington State licensed engineer "that the water system has been installed pursuant the approved WATER PU4N for the Final Plat", signed and stamped by said engineer. The certification may be in the form of a letter but is preferred to be certified on a copy of the WATER PLAN as a schematic map showing the "As Built" water system. 17. That a survey is required prior to the filing of a final plat. CONTY ENPINEER'S CQNDITIQN2 1. That conditional approval of the plat is given subject to dedication of Right-of-Way and approval of the road system as indicated in the preliminary plat of record. 2. That plans, profiles, and cross-sections as designed to County standards showing proposed street centerline and curb grades be submitted to the County Engineer for approval prior to construction and/or the filing of each final plat; road plans to be prepared under the direction of a licensed Professional Civil Engineer. 3. That drainage plans and design calculations showing the alignment of drainage facilities be submitted to the County Engineer for approval prior to construction and/or the filing of each final plat. Drainage plans to be prepared under the direction of a licensed Professional Civil Engineer. 4. Construction within the proposed public streets and easements shall be performed under the direct supervision of a licensed engineer/surveyor, who shall furnish . 9-88 HEC Findings PE-1168E-78 Page 4 the County Engineer with "As 6uilt" plans and a certificate in writing that all improvements were installed to the lines and grades shown on the approved construction plans and that all disturbed monuments have been replaced. 5. No construction work is to be performed within the existing or proposed public right of way until a pemnit has been issued by the County Engineer. All work is subject to inspection and approval by the County Engineer. 6. All construction within the existing or proposed public Right-of-Way is to be completed prior to filing each final plat or a bond in the amount estimated by the County Engineer to oover the oost of construction of improvements, construction certification, "As Built" plans, and monumenting the street centerlines shall be filed with the County Engineer. 7. That appropriate provisions be made that the following described property be held in trust until the continuation of the streets be dedicated or deeded: A I-ft. strip at the ends or edges of all streets that terminate or border the final plat boundary. (Temporary cul de sacs are required when streets terminate at the plat boundaries.) 8. The applicant should be advised that individual driveway access permits are required prior to issuance of a building permit for drrveway approaches to the County road system." . 9. Dedication of sufficient righ! of way along Pines Road so as to provide 30' feet of right of way west of the centerline of Pines Road. 10. A statement shall be placed in ptat dedication that no direct access be allowed from lots to Pines Road except lot 10 which is the lot located in the northeast oorner of the preliminary plat. 11 . Existing County roads providing direct access to the plat shall be paved and curbed to Spokane County standards. 12. That all public roads within the plat be designed and constructed to Spokane County standards. 13. That sidewalks are required alortig the west side of Pines Road and on one side of the northerly through street which provides a connection between 37th Avenue and Pines Road. Sidewalks shall be extended to 37th Avenue. 14. The County Engineer has designated typical roadway section number two, aocess street standard for the improvement of interior roadways to be constructed within the proposed development. This will require the installation of 36' feet of asphalt. The construction of curbing is also required. 15. The proposed plat shall be improved to the standards set forth in Spokane County Board of Commissioners Resolution No. 80-1592, as amended, which establishes regulations for roads, approaches, drainage, and fees in new construction. 9-88 HEC Fjndings PE-1168E-78 Page 5 16. The County Engineer has examined this development proposal and has determined that the impact of this proposal upon the existing County Road System warrants the dedication of additional right-of-way and the roadway improvements herein specified. 17. This plat or development proposal is located within a drainage basin which has been identified by the Spokane Counry Engineer's Office as having stormwater runoff problems. Since this plat or development proposal is affected by or is a contributor to stoRnwater flows, property owners should participate in the planning and implementation of a future basinwide stormwater management system. The following statement shall be placed in the plat dedication: "That the owner(s) or successor(s) in interest agree to join in any County approved Stormwater Management Program and to pay such rates and charges as may be fixed through public hearings for service or benefit obtained by the planning, design, oonstructing, maintaining or operation of stormwater oontrol facilities". 18. The County Arterial Road Plan identifies Pines Road as a minor arterial. The . existing right of way width of 50' to 60' feet is not oonsistent with that specified in the plan. In order to implement the Arterial Road Plan it is recommended that a strip of property 10' feet in width along the Pines Road frontage be set aside in reserve. This property may be acquired by Spokane County at the time when arterial improvements are made to Pines Road. COUNTY HEALTH DISTRICT GONDITIONS 1. Those oonditions adopted by the Board of County Commissioners on December 1 st, •y 1977, 6oard Resolution 77-1394, which requires that individual residences be connected to a public sewer system rather than have individual on-site septic systems. COUNTY UTILITIES DEPARTMENT GQNDITIONS 1. Any water service for this project shall be provided in aacordance with the Coordinated Water System Plan for Spokane County, as amended. . , - - , r 9-88 HEC Findings PE-1168E-78 Page 6 2. Project will make aonnection with public sewer. County Utilities must review and approve plans and specs. Approved on 22nd day of September, 1988. THE HEARING EXAMINER COMMITTEE HEREBY ATTESTS TO THE ABOVE FINDINGS AND CONCLUSION AND VOTE. . ~ Chairperson A DATE: September 22nd, 1988 . ~ OUGLAS S. ADAMS - Spokane County Subdivtsion Administrator w .r~ • ~ , . ~ •.~ll ( G , c ' - - 5-1 PLANNING DEPARTMENT BROADWAY CENTRE BUILDING N. 721 JEfFERSON STREET PHONE 456-2205 7 • _ „ , - ~J;•-. SPOKANE, WASHINGTON 99260 SPOKANC COUNiY GOURT NOUSE TO: Bob McCann, County Engineers Department , _ FROM: Douglas S. Adams, Planning Department, Planner II - RE: Road modification to Midilome 5th Addition DATE: April 5, 1989 Attached is a plat map of Midilome 5th Addition. The road system outlined in red is a modified change from the road proposed in the preliminary plat. We have been requested to make an Administrative decision regarding this requested change. If you have any questions or concerns with the modification of the road system outlined in red please contact Tom Mosher or myself at 456-2205. Please respond within five days of the date of this memo so that we can prepare our decision. ~ ~ I i i ~ y' ~ ~ ~ ~ ~ ~ ` ~ ~ , ~ ~ - / • ! ~ ' ~ 1 I .1 `dp ► ~ ' ~ ~ ~ 0 ` ~ ~ ~ ~ / ' • ~ 1 ~ ~ ~ I_ _ _ ~ ~ _ _ • . ~ I 1 1 I 1 ~ i~~~ Y i~ • . I I I~1 T I I ' ~r. + ` ~ V / ~ ~ ~ ~ I ~ ~ ( ~ ~ ~ ( . • I 1 ~ I ~ \ / ~ ~ ~ ~ ~ ~ ~ ~ ' ♦ ~ ~ 1 ~ 1 ~ __~J~I ~ 1 , ~ . . ~ i I ~ . .i ~~teN~~~1~4w~rtoa ~ •i~ ~ ' ~ •'`..L. J $ ~ ~ ~ ~ : • % J. % . ► j/ % ~ ' f ~ i ' ~ G~' _'_-~i•"..•; . ...~..a•N 'r,S. 1 ~a~'/ ~ ~ ~ I. ~ ~ ~ i ' '1-7 1~ .\1 I ~ I 41 ~C1 ~ ~ \ ,y~ ~,i~ ~ ~l ~ i 1 ~ ~ ~ i ~ I i ~ r__' __'•1 i.'; ~1'~ • ~ ~~~~,l,n~',`•.~~.,~, ~ ~ ~ ~ ~ ~ , " • ` ~ I f . I } ---t ` ~ I ; '~'~~~~~i` ' 1 ~~i ~~~~~~'~♦'i~~l'D~j • • ~ ~~1 1 I 1 ' 1,~ \ \ ~ 'M \ ',K ~ ti ~ ~ ~ f ~ T 1'/ 1 1 ~ r • ~ ~ ~ 3 ~L ' t~ ~ ~ ~ ~ ~ • f L~ ` ; • ~ • ~ ; L 1 1 ~ 1~~• ~..,+f~~~~~"~~ IJL , % ` ( % , ~ ~ I 1 ~ ( ~ 1 ~ . ~ 1. ~ ~ ~ f~~• r~ • ~ ~ ` ~ ~1 ~ I' ' ' ' . ~ . . . 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DDITION Cu ~ ' . r b61' N. , . ~ r.> I HEAR1NG EXAMINER COMMITTEE PUBLIC FIEARING APPL ICAT ION NO : (Check one) I would like to be on record in ~FAVOR OPPOSITION / r NEUTRAL Do you wish to TESTIFY a t this Hearing? YES NO ~ YOUR NAME : (please print Address : ?q l HEARING EXAMINER CON1MITTEE PUBLIC tIEARING APPL I CAT ION NO : (Check one) I would like to be on record in _ FAVOR ' l r OPPOSITION NEUTRAL Do you wish to TESTIFY a t this Hearing? YES NO ~ YOUR NAfIE : /Or'l'lL, (please print) Addres s : _;uc' / S-- 2- ~ . Z HEARING EXAMINER COMMITTEE PUBLIC fiEARING AP PL I CAT I QN NO : (Check one) ~ I would like i:o be on record in FAVOF: ~ OPPO`.~ITION / r NEUTF;AL Do you wi sh to TESTIFY at thi s Heari ng? YES rro YOUR NA(IE : ( pl ease pri nt,) j~ Addres s : _ ~ N 4 r , t IUBD W,SION PLANJVING REPORT TO: SPOKANE COUNTY HEARING EXAMINER COMMITTEE FROM: SPOKANE COUNTY PLANNING DEPARTMENT MIDILOME 5TH ADDITION CHANGE OF CONDITIONS P E - 1 1 68 E - 7 8 ZE-13-78 R-1 zoning 1. GENERAL INFORMATION JEnaineer:_ 926-1322 5j2qnsqr1 535-1264 BprveSQr Midilome Inc. Mike Phillips 3001 E. 29th Ave. N. 909 Argonne Road Spokane, WA 99203 Spokane, WA 99212 L i n: Located on the west side of Pines Road and the east side of Bowdish Road and approximately 930' feet northeast of the intersection of the Dishman Mica Road and Bowdish Road in Section 33, Township 25 North, Range 44 E.W.M., Spokane County, Washington. Proaosal: To realign the southerly road serving the preliminary plat to avoid creating double fronting lots and the potential future creation of an arterial on 40th Avenue. No zone change or general lot size change is proposed. The redesign has two fewer lots than the original proposal. II. SITE PLAN INFORMATION A. Site Size: approx. 60 acres; Overall Density,: approx. 2.8 units per acre. B. Land Use Plan: The Comprehensive Plan designates this area as Urban and is within the Priority Sewer Service Area (PSSA) boundary. C. Arterial Road Plan: The Midilome proposal was approved by Spokane County prior to the adoption of the Arterial Road Plan. The proposed change does not affect proposed arterials. Note: Pines Road is a State Highway. D. aile Characteris.Jics,: The area is developing as a single family residential area which is relatively flat. Pines Road adjoins the property on the east. E. N i h rhoo Characteristics: The area is single family residential south of 32nd Avenue. Some multi family and commercial uses occur north and east of 32nd. A grade school and junior high of the Central Valley Schoo) District are on the east side of Pines across from the Midilome project. F. Zoninq: Prooosa-l: Unplatted land presently Agricultural, approved to R-1. North: LB, R-2 and Multi Family Suburban. East: Agricultural. South: Agricultural. West: R -1 . 9-88 Planning Report PE-1168E-78 Page 2 6 . ~ ~ : • . ~ i ' `i~ .C~ ~ ; --'-t ' 3y s ►.iw.,c ~ i . 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't ~ ~ , r ~ i' ~ + ~ ~ ih i N w w ~ \ y ' i ~ ~ , I ~ r M ~S ~ ~ ~1 r =Q ~ ~ 1y' ~ N ~ ~ '1 I ~ e ~ ~ ~ • r ~o ` ~ y n ; t, m 0. .0 6. t o ~ ' ~ ` ~ • + i n ~ ~ n ~ ~u! i J r T ~ ~ ` r' 1 , ~ i tr ♦ * ~ « v~ q . ~ , h1t1 t4.4 ~ ~ • . s i ~ . ~ ~ , 1 ~ t ,~y f , h • u ' ~ ; n. , ~ F U . 14 ~ ~ MI 11 ~ 1 ~ •~a ~r, . ~ a. y ~ ~ 1 W 1 1 ~ d~Tt ppTp ~ ¢LWRIL> UhVLLSiFp ~ MUMOGQ OF IDI`!p I IV8 ~ N ~ M1601. W7ylTfr INlal)S ~ tVItLAL lOf FY*wt-,&& I~ I 'fb1DL OGQ.&M, cilLdf I 40bC ~ PRELIMINARY PLAT OF . si~,r.e I Pyn►GD MuM~N~~Y OHwN ~ hv MIDILOME 5TH ADDITION Mr. V4° CIF W-,S. f s4, C r.WK CLARENCE E. SIMPSON ENGINEERS, INC. N. 909 ARGONNE ROAD PH: 926-1322 SPOKANE, WASHINGTON 99212 . E on - DRAwN BY: 7iIILLIP"J I.!'iD'dD IVAotcf ra I 011Aw40 w ~ . ~ I I . . ' r • . ~ a ~ - c •a N . • ~ \ . - ~ P E 90 ` • . s ~ . , , . 66 7. . ~ . - . N + ~ i v tJ . _ t j ~NtILCY A K G. r tl , .l ~ - ~ ~ • Q i ~ ~ 1 C ~ ~ ~ a• ► ! S~ ro 97 • ..c~s.. ny ~ ~ ~ . • ° ~ J ~ ~ ♦ ~ . t Y#'3*sin.~~,~. ♦ .11 ~ I l..rws E1.30. d- 5 t + 5 T . ; . . . • * _ ~ ~ - ~ x o 4A 1 1~ ~ ~ 6, ~ j~ . s 1 • • 6 ` { y -rj~ ~ • ~ ~ , ` - ~ ~ n`~ • ' • ~ ` Sf~ 27 -t L Nr ~ - 3 . ~ ♦ ♦ • •/t'~ + _tiack"^ e , ' ~ Q ~L. • ' . ~ + ~+'r I 7 ~ 1~ pr, va"' 41,' 4W i • ~ . 3 + ~ - ~ T L { ' 3666 > D , ~ . t , 8q 449 ~ b 14 V ~ ' . ~ • . ~ . . t ~ ~ 131~~~ c' V ♦ Q►r, r'~ ' r7 ~~'~`ti ~ r~ie..~, ` , • ~ ~ 1 ~s fa1T,4 t y~0~ ~ ~ • ~~)y ` ~ p~• ~ ~ Q 9 ~ ~ ♦ j Q r . y a ~ r r Y z 1 ~J t~ ~'y Rn~ k 4q J ~ ~ 9 ~ !G • 't ~ KIi ' ° - • ~ ~ ' f ~ ~ . ~ - ,bU. ' ; ~ ~ • 1 E 1,~c., _ U ' . ( - , a I ~ J~ 1 ~ f . - - Page 25 i G. JAMd Use,: Site: Unplatted land is currently vacant. North: Developing single family residences. East: Horizon Junior High and Chester Elementary Schools. So uth : Vacant West: Single family residences. H. 5 p&i_al Inf-ormation: ir ula i n: Pines Road and Bowdish are the arterials which will be major access routes to this development. The redesign has been reviewed by the Spokane County Engineer's Department and is supported by them. Water u ,ply: Model Irrigation District will provide water. An approved water Plan will be required prior to finalizing this preliminary plat. Sewaae Disaosal: A public sewage system maintained by Spokane County would serve the lots yet to be developed. Schoal : The proposal is in the Central Valley School District #356. Fire Pro#ection - The proposal is located within Fire District #1. The Fire District and County Building and Safety Department (Fire Marshall) are required to approve fire protection provisions prior to finalizing the preliminary plat. III. HISTORY/ANALYSIS This project was originally approved in 1978. Since that time five plats have been filed consistent with the original approval. The lots which currently abut Pines and the proposed 40th Avenue are not as attractive for single family residential use because of potential for high traffic adjacent to these lots. IV. ENVIRONMENTAL REVIEW An Environmental Checklist was submitted by the sponsor and was reviewed by the County Planning Department staff. The review considered the specifics of the proposal, other available information, County ordinances, other regulations and laws and the standard Conditions of Approval. County Planning Department has determined that "No probable significant adverse impacts" would result from the proposal being developed and has issued a Determinktion of Non-Significance, ("DNS"). The "DNS" was circulated to 10 other agencies of jurisdiction and other agencies/departments affected by the future development for review and comment. Ihe "DNS" commeniLperiod Qnds Sqg,tember 21. 1988. and was advertised 15 Qalend3r davs before %,id date io the newsWer,by letter to adiacent-prooerty- owners 400 feeJ of the oronosal. bv notice on a si n~posted on~prooosal site and ~y letter tQ the general mailinQ list Hearing Examiner Committee may consider additional environmental related testimony and the "DNS" at the public hearing. 9-88 Planning Report PE-1168E-78 Page 27 ~ V. LEAD AGENCY SUMMARY The current proposal does not affect already approved zoning or lot sizes for this area. By establishing a modified traffic flow the area should be able to establish a sound residential atmosphere without noise and other problems associated with arterials. The Spokane County Planning Department recommends approval unless unresolved issues arise during the course of the public hearing. VI. CONDITIONS OF APPROVAL _ If approval is granted, the following conditions are recommended. PLANNING_pEPARTMENT CONDITIONS: 1. That the below listed conditions of all Departments and Agencies are binding upon the applicant, owner(s) of the property, heirs, successors or assigns. 2. The preliminary plat of record approval is for the property legally described in the application for this proposal. 3. That the Final Plat be designed substantially in conformance with the changed preliminary design as legally described and advertised. No increase of density or lot number shall occur without a new application submittal and approval. 4. The Spokane County Subdivision Administrator shall review any proposed Final Plat to insure compliance with the Findings and Conditions of Approval. 5. That the preliminary plat be given conditional approval for three (3) years to October 1 st, 1991. The applicant may request an Extension of Time by submitting a written request forty-five (45) days prior to the above expiration date. 6. Upon filing the Final Plat the zone change of the Final Plat area shall be finalized and the existing Agricultural zone classification shall be changed to R-1. 7. That a Final Plat name be indicated before the final plat is filed; such name to be approved by the County Planning Director/Designee. 8. That appropriate road names be indicated on the plat. 9. That appropriate utility easements be indicated on copies of the proposed final plat. Written approval of said utility easements by said utility companies must be received with the submittal of the final plat. 10. That 3 current certificates of title be furnished the County Planning Department prior to filing the final plat. 11. That the following statement be placed in the final plat dedication: "No more than one dwelling structure be placed on any Lot nor shall any lot be further subdivided for the purpose of creating additional lots, ownerships, or building sites without first filing a replat." , 9-88 Planning Report PE-1168E-78 Page 28 12. The final plat map shall indicate by a clear dashed line, the required setbacks from all private, tract x or public roads. the dedication shall cantain a statement that: "Side yard and rear yard setbacks shall be determined at the time building permits are requested. The setbacks indicated on this subdivision may be varied from if proper zoning approvals are obtained." 13. That a plan for water facilities adequate for domestic service and fire protection be approved by the water supplier, fire protection district, Spokane County Building & Safety Department and County health authorities. The agencies will certify on the WATER PLAN, prior to the filing of the final plat or any phase of the preliminary plat that the plan is in conformance with their respective needs and regulations. The WATER PLAN and certification will be drafted on a transparency suitable for reproduction and be signed by the plat sponsor. 14. The purveyor will also certify on the Water Plan that appropriate contractual arrangements and schedule of improvements have been made with the plat sponsor for construction of the water system in accordance with the approved WATER PLAN. The time schedule for improvements will provide for completion of the water system and inspection by the appropriate health authorities prior to application for building permits within the final plat. The arrangements or agreements will include a provision holding Spokane County and the purveyor harmless from claims by any lot purchaser refused a building permit due to the failure of the plat sponsor to satisfactorily complete the approved water system. 15. The final plat dedication will contain the following statement: "The public water system, pursuant the WATER PLAN approved by County and State Health authorities, the local fire district, County Building & Safety Department, and water purveyor, will be installed within this plat, and the subdivider/sponsor will provide for individual domestic water service as well as fire protection to each lot prior to sale of each Lot and prior to issuance of a building permit for each Lot." 16. That no building permit will be issued for any lot within the Final Plat until certified by a Washington State licensed engineer "that the water system has been installed pursuant the approved WATER PLAN for the Final Plat", signed and stamped by said engineer. The certification may be in the form of a letter but is preferred to be certified on a copy of the WATER PLAN as a schematic map showing the "As Built" water system. 17. That a survey is required prior to the filing of a final plat. COUNTY ENGINEER'S CONDITIONS 1. That conditional approval of the plat is given subject to dedication of Right-of-Way and approval of the road system as indicated in the preliminary plat of record. 2. That plans, profiles, and cross-sections as designed to County standards showing proposed street centerline and curb grades be submitted to the County Engineer for approval prior to construction and/or the filing of each final plat; road plans to be prepared under the direction of a licensed Professional Civil Engineer. 3. That drainage plans and design calculations showing the alignment of drainage facilities be submitted to the County Engineer for approval prior to construction 9-88 Planning Report PE-1168E-78 Page 29 and/or the filing of each final plat. Drainage plans to be prepared under the direction of a ticensed Professional Civil Engineer. 4. That the regulations of the National Flood Insurance Program be observed since the proposed plat is affected by a Flood Hazard Zone.A development permit shall be obtained from the County Engineer before construction or development begins within any area of special flood hazard (reference Spokane County Ordinance 81- 0726). 5. Construction within the proposed public streets and easements shall be performed under the direct supervision of a licensed engineer/surveyor, who shall furnish the County Engineer with "As Built" plans and a certificate in writing that all improvements were installed to the lines and grades shown on the approved construction plans and that all disturbed monuments have been replaced. 6. No construction work is to be performed within the existing or proposed public right of way until a permit has been issued by the County Engineer. All work is subject to inspection and approval by the County Engineer. 7. All construction within the existing or proposed public Right-of-Way is to be completed prior to filing each final plat or a bond in the amount estimated by the County Engineer to cover the cost of construction of improvements, construction certification, "As Built" plans, and monumenting the street centerlines shall be filed with the County Engineer. 8. That appropriate provisions be made that the following described property be held in trust until the continuation of the streets be dedicated or deeded: A I-ft. strip at the ends or edges of all streets that terminate or border the final plat boundary. (Temporary cul de sacs are required when streets terminate at the plat boundaries.) 9. The applicant should be advised that individual driveway access permits are required prior to issuance of a building permit for driveway approaches to the County road system." 10. Dedication of sufficient right of way along Pines Road so as to provide 30' feet of right of way west of the centerline of Pines Road. 11. A statement shall be placed in plat dedication that no direct access be allowed from lots to Pines Road. 12. Existing County roads providing direct access to the plat shall be paved and curbed to Spokane County standards. 13. That all public roads within the plat be designed and constructed to Spokane County standards. 14. That sidewalks are required along Pines Road and the northerly through street which provides a connection between 37th Avenue and Pines Road. Sidewalks shall be extended to 37th Avenue. 15. The County Engineer has designated typical roadway section number two, access street standard for the improvement of interior roadways to be constructed within 9-88 Planning Report PE-1168E-78 Page 30 • ~ r ~ the proposed development. This will require the installation of 36' feet of asphalt. The construction of curbing is also required. 16. The proposed plat shall be improved to the standards set forth in Spokane County Board of Commissioners Resolution No. 80-1592, as amended, which establishes regulations for roads, approaches, drainage, and fees in new construction. 17. The County Engineer has examined this development proposal and has determined that the impact of this proposal upon the existing County Road System warrants the dedication of additional right-of-way and the roadway improvements herein specified. 18. This plat or development proposal is located within a drainage basin which has been identified by the Spokane County Engineer's Office as having stormwater runoff problems. Since this plat or development proposal is affected by or is a contributor to stormwater flows, property owners should participate in the planning and implementation of a future basinwide stormwater management system. The following statement shall be placed in the plat dedication: "That the owner(s) or successor(s) in interest agree to join in any County approved Stormwater Management Program and to pay such rates and charges as may be fixed through public hearings for service or benefit obtained by the planning, design, constructing, maintaining or operation of stormwater control facilities". 19. The County Arterial Road Plan identifies Pines Road as a minor arterial. The existing right of way widih of 50' to 60' feet is not consistent with that specified in the plan. In order to implement the Arterial Road Plan it is recommended that a strip of property 10' feet in width along the Pines Road frontage be set aside in reserve. This property may be acquired by Spokane County at the time when arterial improvements are made to Pines Road. COUNTY HEpLTH DLSTRICT CUNDITIONS 1. Those conditions adopted by the Board of County Commissioners on December 1 st, 1977, Board Resolution 77-1394, which requires that individual residences be connected to a public sewer system rather than have individual on-site septic systems. COUNTY UTILITIES QFPARTMENT CQNDITIQNE 1. Any water service for this project shall be provided in accordance with the Coordinated Water System Plan for Spokane County, as amended. 2. Project will make connection with public sewer. County Utilities must review and approve plans and specs. 9-88 Planning Report PE-1168E-78 Page 31 i i ~ ~ ~ ~ , , ~ i \ . ` ~ f_"' i j' ~y~= WWNG. ~ ~ ~ ~ ` ~ ~ , ~ ' _7"'i 1. ~ ~ ~ ~ ~ ~ • 1\.•,~,~r pJa " T__' ~ I ~ ~ ~ ~ ~ , ~ ~ '1 1 ~ ,I I ~ 1 1 ~ ' 1 ~ 1 1 ( ~ \ 1• ~ I ~ ~ i-~"-~' i ~ ~ ~ ~ i ~ ~ ~ ~i ~ , ~ ~ i ~ ._.l.•" 1 1 ~ ~ ~ ~ ♦ ~ ♦ , e~. • ~ ~ 1 ~ ~ I i~7 I I l__ i i ~ , • i • ~ %"7 i ~ i ~ I ~ ' , i `l ~ ' ~ ~ • p' , ~ it • i "'I I ~ , ~ r•-- , ; , r ~ . i i ` - - 14. ~IN` ~ L~•'.~"' l""'y 1,~"'.1..~ ~ i ~ ~~I I """I ~ •i IN, . •'1~ . ' I I ' I ~ ~ i ~ ~ 1 r'_ 1 ""'I 1'.• ` ~ • \ •""-1 1'M~7iWN~G 9m " ~i9oJ^ i ~ : • ~ • ~ ~ I I . ♦ n!` . . i \ ~ / ~ . 1 I I I I f"-"'~ ~ \t ( ~ i ♦ ~ i• i . ...i i ~ I .t~ . l ~ ~ ~ 1 n • p~~ ~ ~ .f ~ . ~ ~ i ~ , ~ i `J. 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" I VIG~NITf MDP ~ . , , 11' , . ~a. ~t ~ ` ~s sc'~ ~a~ aa~ •~c• I . • ~ , ~ i ~7 1 ' • YaII. 1~• 7j~00~ •'n » i . • _ . ~-"r ""~t I~ 1 , ~1 ~ • 1 ~ i' • ' o p a~ . t~ t~ ~ i7 ~ t6 i1 ~ . , ~ i ~ ~ ~ ~ ~ ~ 1~ `~~p ~,u ' ~ M 1~t ♦ Y~ K $ v ~ ~ ~ i ~•t!~ "d n• • ~4. Y< •s e e• a 1 1 ~ i , 1 1 ~ ~ 'x ~ ~ ~V ! ~ / ~ A ~ I i ' ac e~ a. • 6 ~ ~ 4.d' ~ ~ L 1 ~c . /~i: n ~ti i. •t ~s i 3 I: V - ~ d 1i •ti~ M ~ ~ ac ~ 1~ . t C. F~.i ' d• ti d ) ,),Y~` ~ j ~ 0 rJ ~ 1 , ~ y r Z ~e ~ p ~ ~ .1. ~ ~ o~ u~yy>'~~A ~ i.• Iy ~ r g /~r~ e' A, • ' 1Q',u '1e ' F 6~ 1, L N ' ~ L ~ ~ . : ~ ; ~L ~ 'fi- ~ N o~ ' ~ ~ 1 ~ w v ► 1i~ r t t~ ti ~ • ~a MJ- j ~ , ;rL, n: , o- ~ ' ~ i $ t ! F r po ~ w ~ ~ ~ ♦ 1' i ~ ~ ~q i ~ fL ~ ~ . , S 1' ~ U Ir rl 't~ 4,~~iGl:•~~o ~ ! fa i~Ir ~f 'S I~- 9: as e< I , P . ✓ . ~~a ~ ~A 'S * ~L , .i ' 2~ " ~c ac oc I ~ d N ~ n ~ 0. . , * • 1v ~ t$ 42 ~ s p 9 6 ~1 ~ ~ i t 1 9 ~~i • et ~ 4. 1 n; ' t~ ' b F 91 . iQ ~ 1'S~ bt b ~ ~ tc ~c• a~ ws as ~m ~ •ta c~ I^ +~a. w 1 6~ e. .e., S3 M 1 , ~ ~ bi1G ppTA ~ QLND~RKy Uhp6CtLED ~ NUMOCC OG ILTIS I 1l~8 I ' -rvyIum. LO151ik. I371 ~ TY/IGpL Wf F'VONfbiti ~ a,, I rOTaL D-c.ec-o, orm-or ~ I ~ PRELIMINARY PLAT OF pl.+leb I PsxibGO Raun~~s¢Y Oa~cc.N ~ Ncv !o/leled I FyN-,eD fkaUMIK12Y 9OO:-G►l MIDILOME 5TH ADDITION ur. Yy a I,-.C 3tO,T25N,Z'Ytr-WM . CLARENCE E. SIMPSON ENGINEERS, INC. N.909 ARGONNE ROAD PN: 926-1322 ~ SPOKANE, WASHINGTON 99212 ~ ORAWN BY: ~ILLIPh j•b•esb ~ reo+[eT n I ae.n-c w , ' ~ ~ ~ ~ ~ ~ E ~ SPOKANE ENYIRONMENTAL ORDlNANCE (WAC 197-1 1-970) Section 1 1.10.230 (3) Determination ot Nonsignificance (DNS) DETERMINATION OF NONSIGNIFICANCE DESCRIPTlON OF PROPOSAL: To redesian 40th Avenue and the 1 ots affected by that chanae t_n av,Q,ad double frontage lots and estahligh a mmrP markPtahlP development, consistent with existinq phases of that development arhich have already been plattecl. FILE N0: PE-1168E-78 and ZE-13-78 I'9IDIL0[1~ 5TH ADDITION AUrF OF COiJDITIOFIS PROPONENT: Mi di 1 ome I nc . LOGATION OF PROPOSAL, INCLUDING STREET ADDRESS, IF ANY: on the west side of Pi nes P,oad and the east side of Bowdish P.oad and approximately 930' feet northeast of the intersection of the Dishman f-lica Road and Qowdish Road in Section 33, Townshin 25 NQrth. F:ang,P 44 E.Ir!_E1_ . Snnkane Cnunfiv~, L•1achinatnn LEAD AGENCY: SPOKANE COUNTY The lead agency for this proposal has determined that it does not have a probable significant adverse impact on the environment. An Environmental Impact State (EIS) is not required under RCW 43.21 C.030 (2) (c). This decision was made after review of a completed environmental checklist and other information ori file with the lead agency. This information is available to the public on request. This DNS is issued under WAC 197-1 1-340 (2); the lead agency will not act on this proposal for at least 15 days from the date issued (below). Comments regarding this DNS must be submitted no later than 4:00 p.m., September 21st 1988 , if they are intended to alter the DNS. Resaonsible Official: WALLIS D. HUBBARD by Douglas S. Adams Position/Title: Spokane County Subdivision Administrator Phone: (509) 456-2205 Address: N. 721 Jefferson St., Spokane, WA 99260 Comments regarding environmental concerns ar we me at the h ring. Date Issued: .9-2-88 Signature: , ~ . APPEAL of this determination may be made to the Spokane County Planning Department, N. 721 Jefferson St., Spokane, WA 99260. The appeal deadline is the same as the above proposal appeai deadline, being 10 calendar days after the signing of the Findings and Order. This appeal must be wrltten and must be prepared pursuant specific criteria on official appeal forms. Contact the above Resoonsible Official to assistance with the specifics of a SEPA appeal. A copy of the DNS was mai led to: 1- Washington State Department of Ecoloqy (Spokane) . . 2- YVashington State Department of Social & Health Ser. . 3- Spokane County Utllities 4- Spokane Counly Health District S- School District - Central Val 1 ey 6- FireDistrict - 111 7- Water District ~odel I rr . Di st . 8- Washington State Dept. of Transportation(Spokane) 9- County Engineer 10 - County Quilding and Safety ` 173,14 CJ- ~ BOARD OF COUNTY COMMISSIONERS OF SPOKANE COUNTY, 14ASHINGTOr1 FINDINGS AND ORDER REGI3RDING A CHANGE IN CONDITIONS IN PE-1002-76, MIDILONIE ADDITION : WHEREAS, the Board of County Commissioners did, after public hearing on April 7, 1977, approve the`final plat of PE- ; 1002-65, Midilome Addition; and , WHEREAS, a condition of approval regarding this plat authorized th.e use of individual on-site sewage dis- . , . posal systerris; and 6^7HEREAS, the plat sponsor , Robert ~ fiomlinson, did , by letter request that the Roard of County Commissioners con- duct a hearing to consider the request of the plat sponsor to install a public sewage system to serve the subdivision; and WHEREAS, the Board of County Commissioners did hold a public hearing on September 8, 1977, to consider the request of the applicant, objectors, and other interested parties, and ~ WHEREAS, at said hearing opportunity was afforded those favoring and those opposing the above described change in conditions, the Board of County Commissioners of Spokane County having fully considered the documents, reports and'testi- mony given, the environmental review, and all other evidence presented and having personally acquainted themselves with the site and vicinity in questi.on; r10UJ, THEREFORE, the Board of County Commissioners ~ does hereby conclude that the change in condition to a public sewer system would be an upgrading from the individual systems previously approved; that the public sewer system will not have more than a moderate effect on'the environ- ment above that of the, use of individual on-site sewage disposal systerris; that a declaration of non-significance should be issued; that th.e change'of condition allowing . , • t -i . v • !Lry344 a public sewer system should be and is hereby approved subject to the following conditions: : l. That the plat sponsor obtain all necessary approvals from the Department of Ecology, the Department of Social and Health Services, the Spokane County Health District, the Spokane County Engineer's and all other agencies and/or departments of jurisdiction. ` 2. That the developer file with the County Auditor an amerided plat dedication that shall include the following statement: A public sewer system acceptable to County and State Health.Authorities will be made available for thi.s plat, and individual sewer service will be provided prior to occupancy. ' 3. The'plat dedication shall specifica.lly exclude those lots not sewered. The Chairman is hereby authorized 'to sign a final declaration of Non-Signifi.cance. DATED this'J day of 1977. BOARD OF COUNTY COMMISSIONERS OF SPOKANE COUNTY, WASHINGTON . ~ ~ . . . . ~ . . L4~ X* ATTESt: VERNON GV,: " HLAND'` Clerk ; of e. oard r B ~ . . . Deputy . ; _2_ ~ : : - - - . F . ~ , . . . . . ~ ~ A AFFiDAVIT UF PUSTING STATE UF WtiSNINLi70N ) ) SS. FiLE (<<o g CL• COUNTY UF SPOKANE ) ( Pri nt Name -14 t G C. P4 Bei ng fi rst duly sworn, deposes and says : That at times mentioned herein he was, and now is, a citizen of the United States, a resident of Spokane County, Washington, and over the age of twenty-one years. That on 19 he personal ly Posted a si9n( s) as requi red i n ChaPter I I I General Rul es and ~ Regulatons, Section C, Paragraph 3 of the Spokane County Subvidision Ordi nance, (except 15 days ) at the fol 1 owi ng 1 ocati on i n Spokane County, to -wi t : I W--~ Cct~ftAt-_ Si gnature: App i cant or gent Date: ~ l NUTARY PUBLIC Sub sc ri bed a nd swo rn to me ~ 1998 . NUTARY NUdLII: IN ~;ND FUR SPUKAWE ~~~~l,t1TY ,A i;~,~ i t_:ti Resi di ng at 5pokwne, Washi ngton , - , ; , s PLANNING DEPARTMENT ~ ~ ; ~ BROAOWAY CENTRE BUILDINO N. 721 JEFFERSON 3TAEET PNONE 468-2206 -:;~~;^"•.`K $POKANE, WI►SHINGTON99260 ~ s i~ 1,• :=,,,,~t"r. ~ j ~ f. ~ c:»,•. F• ..~.J:,e ~ . FILE N0: FILE NAME: t~L~Lf6..Lr • L.~on PLAT F 1Lt h1EMU I P ICKED UP THE PUBL IC INFUR14aT ION NACKET FOk THE ABOVE NA•1EU PREI.Itii INARY SUBU IY IS IUN. UATE : ~ SIGNA7URE: ~ 3 AFFiDAViT OF MAiLiNG STATE OF WASH I NGTON ) - ) SS. FILE COUNTY OF SPOKANE i (Print Name: ) Being first duly sworn on oath, deposes and says: That I. the below signed, am a citizen of the Unitea Statcs o'r Ameri,-:. ~;1-1 a resident of the State of Washington, and over the age of eighteen years. ;That on the day of 19 I persona li deposited in the lTntited States Mai at -wi th suff i ci ent postage prepa i d, a true and correct copy oi- the W= 0 HEARING, a copy of which is attached hereto and incorporated herein L reference, to the recorded real property owners and taxpayers, as sho,, Spo,kane Gounty Treasurer's records as of the - day 19 ~ - , who have been tound to own property lir 6undred 00 periphery of the Subdivider's owned, controiled or under -ion property. The notices were addressed to those individuals and sent to ~ise addresses as indicated on the attachment attached hereto and "'r'r*lf-F'7tt~,l haY'A1n hv rPf?rp+tCp. ~ ;~A.~c~ . ` a , , _ - ! " ; ~f ~ ~ ~ ' . ~ M E Flpq ~b~ u~sti; ~ •:J • t~ ' O: AR P aL IN AND 0 OKAN C U T , WASRINGT Residing at Spokane, Washington S. 1,.• . S fE8• NOTE - Attach sampTe copy of items mai led, r'~RY ~ti ~►v,s~. :ERTiFiCATON OF TiTLE COMPANY: I do hereby certify that the following list of names and addresses of and taxpayers within 400 feet of the proposal consisting of the sitached pages has been prepared from the latest available records and is to che best of my knowledge correct, and that this information is current within h2aring date. . ; ' Date: ~ I• . ' ~it e Comn a r': ~ . . . , . . , . ' . i i . . / . . . . . Liched tit]e company ownership and taxpayer list with the attached assessor iap(s) and find that al l tax parcel numbers within issessor map(s) have been listed by the titie compat~;. al so that al l property ad jacent the proposu i; i r}c iC~ i►'ly ...:,;-iediately acr(5~s a street or road from the proposal ) has beAn m,_ ' -,-rtif ied" rnai1 inc; . . , , . ` PE g F, ---79 - ~ Y jir-4 A ~ T ID L0,AfE SPOKANE ENVIRONMENTAL ORDINANCE SECTION 11,10,230 -1- 4 SPOKANE ENVIRONHENTAL OROINAHCE . (MIIC 197-11-960) Section 11.10.230(1) Envircnmental Checklist File No. Purpose of Checklist: The State Environmental Poiicy Act (SEPA) chapter 43.21C RCW, requires all goverranental agencies to consider the enviromnental iiapacts of a proposal before making decisions. An Environaental Impact Statement (EIS) must be prepared for all proposals with probable slgnificant adverse irspacts on tAe Quality of the environment. The purpose of this checklist is to provide infonmwtion to help yov and the agency identify lmpacts fram your D*oDosal (and to reduce or avoid impacts from the proposal, if it can be done) and to hetp the agency decide whether an EtS is required. Instructions for Applicants: This environcoental checklist asks you to descrlbe some basic infornation aba t yaur proposal. Governnental agencies use this checklist to determine whether the enviranr,ental impacts of your proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most precise infortaation known, or gSve the best description yau can. You must answer each Question accurately and carefuily. to the best of your knowledge. In most cases, you should be able to answer the questions froe your own observations or proJect plans without the need to hire ezperts. If you really do not know the ansvrer, or if a question does not apply to your proposal. write •do not knaw• or 'does not apply,' Complete answers to the questions no►v may avoid unnecessary delays later. Sone questions ask about governmental re9ulations, such as zoning, shoreline. and landmark designations. Answer these questions if you can. [f you have problems. the governmental agencies can assist you. TAe chetklist questions apply to all parts of your proposal, even if you plan to do thein over a period of time or on different parcels of land. Attach any additiona) information that will describe your proposal or tts environrtentai effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional infonnation reasonably related to deternining if there may be significant adverse impact. Use of cAeckllst for nonprosect prcposals: c Camplete thts checklist for nonproject proposals. even though questions may be answered "does not apply•. IN AODITION, cowplete the SUPPlE11Et1TAL SHEET FOR NONDROJECT ACTIONS(Part 0). For rronproject actions, the references 1n the thetkllst to the words 'project.' 'applicant,' and 'praperty or site' should be read as 'proposal," 'proposer.' and 'affected geographic area.' respectively. A. BACKGROUND t. yame of proposed project. if applicaDle: MIDILOME 2. Naae of Applicant: Midilome, IT1C. • 3. Address and phone nunber of applicant or concacc oerson: Robert H. Tomlinson E. 3001 - 29th Avenue Spokane, Washington 99223-4816 (509) 535-1264 4. oate checklist prepared: August 23, 1988 S. Agency requesting checklist: SpO1CSIIE County Planning Department 6. Proposed timing or schedule (including phasing, if applicable): BaSed 021 25 ZOtS per year SVP_rr1ge absorbtion, ADDXOX1II18telV S1X (6) years t0 s211. Ollt. 7. a. Oo you have any plans for future additions, expanston, or further activity related to or corm ected with this proposal? If yes, explatn. NO b. Uo you own or have options on land nearby or adjacent to this proposal? If yes, explain. NO 8. List any environrtental information you know abaut that has been prepared, or will be prepared, directly related to this proposal. A„ Pnvironmental-imvact statement was prepared at the time of original approval, approxmiately 1976 Rev.2/1/88 ~ SPOlU21E ENVIROtiMNfAL ORDINAtiCE (VAC 197-11-960) Section 11.10.230(1) , A. BACICCBOIILID (continued) • 9. Do you im ov vhethtr npplications are peediog for govetnmental approvals of other proponala directly affecting the propecty eovered by your propoaal' 2f yee, ezplaln. NO 10. List any governmeat approvala or permita that vi ll be needed for your propoeal, 1f latovn. NO 11. Clve a btief. complete deacription of yw r proposal, including the proposed uaes and the eize of the project and site. :'herQ are sevecal quea[iona Later in thie checkllaC that ask you to deecribe certain aepecte of your proposal. You do not need [o repeat those ansvers on this page. Residential use 12. Locatlon of the pcopoaal. Give eufficieet information for s person [o undecetand the preelee lowtioe of qour propoeed project, including a sc net address. if aaq, and eection, tovnship and range, if knovn. If e propo w 1 vould oeeur ovec a range.of area, provtde the range or bouadarlea of the elte(s). Provide a legal description, eita plan, vicinity msp. and topographic map, if reaeonably available. tJhile you shw ld subait any plaas required br the uganey, you are not required to duplicace mapa or detailed plane submi[ted wlth any permlt application related to [hle checklisc. Northeast 1/4 of Section 33, Tocanship 25 North, Range 44 EWM 13. Dces the proposed accion !Se vichin the Aqulfer Senaicive Area (ASA)? :'he Generul Sever Service Area? :he Priority Sewer Service Area? The Cicy of Spokane' (See: Spoicane County'e ASA Overlay Zone Atlae for boundariee). YES "0 BE CO]!F[.E'LD BT APPLICAN[ B. EFVIROP`tER'..AL EI.EMEYfS Evuluation Foc Agency Use Only 1. EAR:iI a. Ceneral deecription of the elte (cirele one): flat, rollirtg, hilly, sceep slopes, mountainous. ~ other: FLAT ~ l , b. 'fiat !s the ateepeat slope on the eite (apptoximate percent alope)? 5/O ~ c. 11hat geaeral types of soile are found on the site (for example, clay, sand, gravel, pea[, muck)? Lf you knov the claeaificatloa of agricultural eoils, epecify them artd note any prlme farmland. GRAVEL d. 4re chere surface ladicatlona or history of unstable aolle in the immediate viclnizy? If so, describe. ~ NO ~ V ! u 0 . . 2 SP0ICANE ENYIRONNENTAL OROINANCE (wAC197-i1-96U) Section 11.10.230(1) B. ENVIRONMENTAL ELEMENTS(cantinued) • Evaluation For Agency Use Only e. Oescribe the purpose, type, anC approximate quantities of any filling or grading proposed. Indicate source of f111. Normal road grading. No fill to be imported except road surfacing f. Could eroston o a ur as a result of clearing, construction, or use? If so, generally descrlbe. NO . ~ g. About what percent of the site will be covered with irrtpervious surfaces after project construc- tion (for example, asphalt or buildings)? 30% ✓ h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: _No erosiqn exDected ~ 2. AIR a. What type of emissions to the air would result from the proposal (i.e., dust, automobile. oEors industrial, wood smoke) during constructlon and when the profect is completed? If any, generally describe and give appraximate quantites if known. ~ Automobile travel in residential area b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. NONE ~ c. Proposed measures to reduce or control emissions or other impacts to air, if any: NONE ~ 3. NATER a. Surface: (i) Is there any surface water bady on or in the irrmedlate vicinity of the site incl:::inS yc:r round and seasonal streams, saltwater, lakes. ponds, wetlands)? If yes. describe type and provide names. If appropriate, state what stream or river it flows into. NO ~ 1 l (Z) Will the project require any work over. In, or adfacent tu (within 200 feet) the descriDed waters? If yes, please describe and attach available plans. / NO 0 ~ 3 - SPOICAH6 HNVIROplSEtrLAL ORDINA2JCE (!JAC197-11-960) Section 11.10.230(1) 8. Ht7ViRON!{ENTAL ELElE:7:'S (continued) . EvaluaClon For Agency Use Only (3) Estimace the amount of fill and dredge material that would be placcd in or removed from the aurface vater or vetlands and indicate the area of the ei[e that vould be affected. Indicate che eource of fill macerial. ~ NONE ~ r (b) Vill the propoaal reQuire surface water vithdravale or diversione? Cive a general descrip- tion, putpoae, and approxima[e Quantl[les. if knovn. NO v_~ ' (5) Doee che propoeal ie vlthln a 100-qear flood plain? If ao, note location on the aite plan. Nn (5) Doea the proposal involve any diechsrges of vasce materiule to aurface vacerat If so, describe the type of vaste and anticipated volume of diacharge. • NO ~ b. Cround: (1) UL11 groundva[tr be vlthdravn, or vlll vater be dlseharged to groundvater? Clve general description, purpose, and approximate quantitie . tf lnovn. NO • ,dZf ~ Describe vaste material that vill be diacharged Snto the ground from septic tanke or other eauitacy vaete trea[nent facility. Deacrlbe che generel eize of the eyecem, the number of houses to be aerved (if applicable) or the number of pereons the ayatem(s) ace e:pected to serve. NONE f (J) Deaeribe any eyatema, other than those deslgned for the diapoeal of sanicary vaece, inatalled for the purpose of discharging fluide belov the gtound autface (includee syatems such as those for the dispoeal of atorm vster or drainage fros floor draine). Describe the cype of syscem, the omount of material to be diapooed af through the syecem and the typea of macerials likely to be disposed of (including aaterials vhich may enter the eyscem inadvercen[ly through spills or as a reault of firefighting activitiee). NONE ~i (4) u111 any cheeiicals (especially organlc solvents or petroleum fuele) be stored la above- ground or uederground etorage tanks? Lf so, vhat typea aad quantitiee of materials vill be stored? NO O ~ 4 (WAC:197-11-960) Section 11.10.230(1) $POICANE EttVIflOIMEti'fAL ORDI11ANCE ' B. ENVIRONHEN'fAL ELEM7TS (contirtued) . Evuluation Por Agency Oee Only (5) tfiat protec[ive neaeuree vill De taken to ineure [het leaks oc apille of any cheedcals stored or used on site vill not be alloved to pereolate to groundvater (Chia includea oeasures to keep checiicals out oF dispoeal systeme deecribed in 3b(2) anA 3b(3)1 ~ No chemicals / c. uetec Runoff (lncluding sto m vater): (1) Deacribe the eouree of runoff (including atorm vater) nnd met'tod of collection and diapoeal SE any (lnclude Quantitlea, if knovn). Where vill thie water flov? W111 thla water flov into other vacera? If so, deacribe. 208 drainage swales and dry wells wilZ be installed ~ (2) :7111 any chemicals be atored, handled oc ueed on the site 1n a locatioe vhere a apill or leak vill drain to aurface or groundveter or to a etorm water disposal eyatem dieeharging to surface or groundwacer? NO v (7) Could vaete muterial• encer ground or eur nee ycers? If so, generally deecribe. NO ~ d. Proposed meaeures to reduce or control eurface, grourtd, and runofE water impacte, lf any (if t che propoeed action lies vithin the Aquifer Seneitlve Are■ be especlally clear on euplanstions r relating to facili[lea cortcerning Sectione 3b(4). 3b(5), and 3c(2) of chia checklist): 208 drainage swales and dry wells 14. PI.A.`JT S a. ':heck or circle type of vegetatioo found on the aite: deciduoua cree: alder, maple, aepen, other. ;v green tre • fir, ceder, ptne. other. shruDe. grasa. cure. / c op oc graln. ~ vet soil planta, cattail, buttercup, bullruah, akunk cabbage. other. water plancs: water lilly, eelgraee, milfoil, other. other typee oC veqecatlon. b. tdhac kind and amounc of vegetation vlll be removed or altered? alf alf a ~ c. Llsc threatened or endangered specles lmovn to 5e on or near the site. ~ NONE d. Proposed landseaping, use of oetive plante, or other measures Co preaerve oc enhance vegecatio ~ on the eite, if any: ~ ~ NONE 5 ~ SPd1CANE ENYIRONHENTAL OROINANCE (wAC 197-11-960) Section 11.10.230(1) B. ENVIRONMENTAL EIEMENTS (continued) Evaluation For Agency Use Only 5. ANIMALS a. Circle any birds and animals whith have been observed on or near the site or are kna+n to be on or near the site: birds: hawk, heron, eagl <bea birds other: NON E , mamnals: deer. Dear, elk, othe r: fish: bass, salmon, trout, herring, shellfish, other: other: b. List any threatened or endangered species kna►+n to De on or near the site. NONE c. Is the site part of a nSgratton route? If so, explain. , NO d. Proposed neasures to preserve or enhance wildtlfe. 1f any: . NONE 5. ENERGY AND 4ATURAL RESOURtES a. uhat kinds of energy (electric, naturai gas, wood stove, solar) will be used to meet the the completed project's energy needs? Describe whether tt will be used for heating, manufac- turing, etc. Electric, natural gas b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. NO c. What kinds of energy conservation features are incluEed in the plans of thls proposal? List other proposed measures to reduce or control energy impacts, if any: NONE 7. ENVIRONMENTAL HEALTH " a. Are there any environmentai heaith hazards. including exposure to toxic chemicals, risk of fire and exolosion, spill, or hazardous waste, that could occur as a result of this proposal? if so, describe. NO , V (1) Uescribe special emergency services that might be required. NONE ~ - ~ 6 • SPORANS ENVIRONlEtiTAL ORDINAt7CE ' (WAC 197=11-960) Section 11.10.230(1) B. E!1VIRONNEtTIA1. Et.EKEN'I'S (continued) Evaluaclon For Agcney Uae Only EIiVIROtil~2T:AL HEAL':N (eontinued) (2) Propoeed meaeuree to reduce or control •~.lrocrmental health hazards, if enq: ~ NONE b. Nolae: (1) What [ypes of nolae exlat ln [he area vhlch maq affect your projeec (for e:amplc: [raffic, equipment, operation, other? Home construction ~ ~ (2) What [ypea and levels of noiee vould be created Dy or aeaociated vith the pro)ect on a ahor[-[erm or a long-terei baeis (for example: traffic, conetruetion. operation. other)? Indieute vhat houre nolae vould come from the eite. Short term road and utilities construction (3) Proposed measure to rcduce or control noiae impacte, i[ any: 8. LA:1D AAID SltORELINE USE a. What le the current uae of cfie ite a d adjacent propertlee? Not in use - ~r4Q~. . ~ b. lias the site been uaed for agriculture? If so, deacrlDe. Yes, alfalfa, hay c. Deacribe any structuree on the site. N ON E d. Will any struccures be demoliehed? If eo, vhich? NONE e. What le the current soning claeeifieation of tAo eite? R- 1 f. What is the current cmprehenelve plan deaignatioa of che site? U r b an g. If applicable, vhat !e the current ahorellne mas[er program designation of the eite?EIA h. Rae any pact of the site been claeaified ae an 'enviroaaeatelly senei[!ve' area? If so, epecify. NONE i. Approzinatelq hov many people vould reelde or vork io the completed projeet4 1 D D r O X- imatelv 350 7 SPO1CAttE ENMIBONMEMPAL OBDINANCE ~ (wAC 197-11-960) Section 11.10.210(1) ' B. ENVIROtiKMAL ELEMEtri5 (eontiaued) °valuation For Agency Uee Ortly J. Approximatelq hov aany people vould the completed project displace4 NON E k. Propoeed meaeures to avoid or reduee dieplacement impaets, if aey: ~ NONE 1. Propoeed eeanurea to eneure the propoeal is coIDpatible vith e:ieting and projected land usea and plans, if anq: NONE 9. tiOUSING a. Approximacelq hov many units vould De provided, if any? Indicate vhether high-, oiddle-, or lorincome housing. Middle income homes b. Approxicately hov many unita, !f any, vould Ae elininetedi Indlcate vhethec high-, siddle-, or 1 lowlncome houeing. 1 NONE c. Propaeed measures to reduce or control housing impacts, !f any: NONE 10. AESTIIETICS a. uhat Is the tallest height of any proposed atruccure(e), not lncluding ancecmae? Whst le the prinelpal exterlor building meterial(s) proposed'. Two story Wood, brick, stone b. +rhat vieve ln the lomedlate viclnicy vould be altered oT obattvcted? Onen field replaced by streets and homes c. Propoeed measures to reduee or control aeathetic lapacte, if any: Architectural control committee 11. I.ICti'.' AND CL1RE • n. '7hac type of light or glate vlll the proposal produce? 'fiac tlan of day vould it oainly occur? Street liQhting during hours of darkness b. Could light or glare from the finiahed project be s aafety hazard or ln[erfere vith vleve2 NO c. lrhat e:iecing off-eite eourcee of light or glare may affect your propoaal? NONE d. Proposed meaeurea to reduce or control light and glare impacte. 1f any: / a NONE / ~ 8 SPOlUNE @iVIRONMEN'fAL ORDINANCE (WAG% 197-11-960) Sec[lon 11.10.230(1) • B. BNVIRONMENTAL ELF.MNTS (continued) Evaluation For Agencq Use Only 12. RECREA?I011 a. tfiat deeignated and informal recreational opportunities are in the immediote vicioity? Golf course to the south of the property 4.-_~ ► b. u'ould the propoaed project dieplace eny ealeting recreational ueee? If so, deacribe. NO C. Propoeed meneures to reduce oc control impacts on recreation, ineluding reereational opportuni- [lea to be provided by the pcoject or applican[, 1E any: NONE : 13. NIS"'ORIC ACJD CULTiJRAL PRESERVATION a. Are there any placee oc oDjecte lleced on or propoeed for mtiocw 1, atate or local preserva- tion registere knovn to be on or next to the olte? I: sa, generall7 deacrlbn. NO 14~ b. Cenerally describe any landnarks or evidence of hiscocic archueological, aciencific or cultural loporcnnce knovn co De on or ne:t to the site. NONE c. Propoeed meaauree co reduce or control iapacte, LE any: NONE vF ia. -&AtISPOR'ATIO.~ a. Identify public etreets and highvaye serving the eite and describe proposed accese to the eaiscing eCree[ eystem. Shoron stte plans, if any. ~ 32nd Avenue to the north b. Ia site currently served by publlc cranai[? If not, vhat is the approxiaate dietance to the nenreat craneit stop? 1200 feet c. (lov many parlcing epaee• vauld the completed projeec hnve? Flov many vould che projeet eliffinate' On and off street parking in a typical residential area d. 11111 the proposel require nny nev roade or streece, or toprovemeaca to exiating roade or streets not including drivevayg? .c ao. generally describe (indicate vhecher vuDlic or private). Public roads will be built e. Nill the project use (or occur in the Smmedia[e vicinity of) vater, rail, oc air trartsportation? If so, generally descriDe. NO ~ 9 . . . SPORANE ENVIRON!SEN?AL ORDINANCE ~(SihC 197-I1-960) Sectlon 11.10.230(1) B. E2TVIROHMEN"AL ELElENTS (eontinued) Evaluation For Agency Uae Only f Hov many vehlcular cripe per day vould be generated by the coopleted project? If knovn, ' indicate vhen peak vould occur. Not known ~ J ~ g. Proposed meaeures [o reduce or control tranaportation impac[s, if any: r NONE ~ 15. PUBLIC SERVICES a. :lould the projec[ resulc in an increaeed need for public aervicee (for exsmple, fire protection, police protection. health care, echools, other)? If so, generally descrlbe. Aizradual increase of these services is anticipated as ~ the community grows D. Proposed measures to reduce or control direct impacta on public servicea. i` any: / NONE ~ 16. U"ILI:'IES o. Ctrcle utiliciee currencly evailnble at the sice: electricity, natuzal gae, vater, refuse eervice, telephone, san![ary eevec, eeptic syatem, other. Al1 utilities are available next to the site All utilities will be available on the site b. Deacribe the utillties the[ are proposed for the project, the utility providing the aervice and the oeneral conatruction activlties on the eite or in the iemediate vicinity vhich eight be needed. ~ C. SICNATl1RE I, the undersigned, avear under the penalty of perjury that the above reaportaea are mede truthfully and to the beat of my knovledge. I also underatand that, there be any vlllful mlerepreeentatlon or v111fu1 lack of full diaeloeure on my part. the a enc aay vlthdrav any decerminacion o nonai ificance thec it might iseue in reliance upon thie cheekliet. Date~ Proponenc Robert H. Tomlinson AS( (Please Print or Type) Proponent: ~)A A .4 A Addreae: E. 3001 - 29th Avenue gnature p►,one: (509) 535-1264 Spokane, Washington 99223-4816 Person completing form: Date: Phone: (509) 535-1264 POR STAPY USE ONLY Staff inembez(s) revieving checkliat: Based o c a acaff reviev of the environmental checklist and other pertinent information, the ecaff: A. Concludes chat there are no probable significanc adveree impacts and recammende a determiaation of noneignlficance. / B. Concludes [het probable aignificant adveree environcental impacte do exiet for the current propoeal and recommende a nitigated de[er- mina[lon of nonaignificance vith coaditions. C. Concludea that there are proDaDle eignificant adverae envlronmen[al impacts and recommeods a determlm [!oe of eignificanee. PILING PEE - $75.00 10 ~ b PiECE ~ I W Date- Receiwed From ; ~ . Address ~ 31W ~2-9'~ DoIlars $ o2Oc' ~ For C+~~ SEP~ ~gg. 4'4Zp accauNT HowPAIQ ~ COtfN'~X ~C D~~~ Ah1.i. QF ~ ~H I ACtCtINZ AM3. FAED rW_4* < fChE 'F 6ALANrCF ~Ot~f1' ~ ' . _ GUE C7~AD~A B - • ~ ~ BI($1]6 rCDW43M . ~~~~TKENT ~ , APPLICATION FCIR Cl~~~ OF CONDITIONS FOR AN APPROVED SUB1~IVISION Date : 4t(n ~2- q ~ t ~►~j ~ffli.catioa Nv : Name vf Applicaat . S treet Address : r-- `2~ Ci t y: ~►'~t~~ S t ate : WN- Z ip G o d e T e 1. N o Exi~ting Zone; Frvpc►sed Zonfng r Approved # of Lots: ilate Preliminary Apprvva; Egpires: ~k~-- J E SIA Legal Description of Prcrperty: ~ T c c~- `r--- '~►~-i~~ cp S,3 . A►TA a 5 MO VS -13T q) 5 o T T+ - ra ~ t L.~..~ ~ ~,~4-~►~r hob ~ 5'1,51?- 70'r7 5ection: •s~ Township ~ a,5 Range ` -tY Tax P arcel No. : 4~G,41 Source of Legal; ti CA~ + . ~t.~ ~ PR(DP~SLD CHMGE OF CON13ITItJNS : Reference specific Conditions of original approval, (Cite the appl.icable cvndition from the F'ind3ng;s &Order v~ the Hearing Exam.iner Committee' s public hearin,g). 0. ~ t~~ ,~`V`+~ ~ Give detailed explanatiaa of request far change in thir status vf the proposal: L: ~ ~ V-k11 16~ la~~ T-T~~, IF ~EVELDPMEN"r OF THE SITE WII.L B~ CHANGED S1J~~TANTIALLY BY T'HIS REQUEST, vR TtIE PROPER'~Y HAS BOUNDARIES DIFF~.~ '~II 0 'I~iIALL~' FROFOS~.D, A~ ~VISE3 AR DEVELUPMM PLAtd KUST BE SUBMITTED ANA SlGk~ED Y T~ ~~OKANE COUNTY PIANNMG, ENGINEERING AXD UT3CLITIES DEPARTMMS AiNiD ~ 'IsPj E COLTNTY HEALTH DIS'TRICT. J' S.ZGNATURE 'QF APPLICANT OR AGENT;, . _ . ~I ~ !~•~~~~1,~ Adc3tess - (if different than Applicant' s) ~ - - . . , • .~~x 6 8 . ALL SIGNATURE BLOCKS MUST BE PILLED IN, IF APPROPRIATE, BEFORE RETURNING TO THE SUBDIVISION ADMINISTRATOR ACXNOSJLEDGE.MENTS ~ ; i, the undereigned, have completed the inf ormation requested, ~ and t~ 'u , ~ Preliminary Plat hae been prepared by me under my supervieion in accordance with the nte of the Spokane County Planning Department aad the lawe of th ngtoa. . V+ A 5<~'O Sipned: 1~ Date: 112& Addresa. ~ ~ - Phone: `~~Cv •l ~22 17C~-•~~ 78 ~ a- Zip: L:1 S Uic Y{3fN T; ,E 7 ~t v~(•~~,. ~ t. .Y f I, ther , svear uader the penalty of perjury that the above responaes are made truthf ully and tu the beet of my knowledge. I f urther 8wear that I AM THE OWNER OF B.ECORD of the site proposed as the preliminary plat, or if n,ot the oWner, attached herewith ia a xritten permiseion f rom said oWnrer authorizing ay actione on his or her behalf. I also underetand, ehould there by any wi11fu1 mierepresen -#on or Willful lack or full di8cloare on my part, Spokan,e County maq vrithdr apy Declaration of Non-Signif icance that it might iseue in reliance upon t s. eckli t. Sign,ed: 7`Date: Address: Phon,e: Zip : NOTARY: . Date: NOTARY SEAL PART II - TO BE COIriPLETED BY WATIIt PURVEYOR A. Thie subdivision (i(is aot) eituated xithin our service area. B. We are (able) (no a~le) & xillin,g to eupply this subdiviaion With adequate water for (AQWsUc) (tjje) (induetrial) (comm.ercial) uaes. C. Satisfactorq arrangement (have) (have not) been made to aerve thie p ropo sal. D. Signature (only when ite.me A, B& C are true and completed) E. Private (vells) (vater eyetem) ie (approved) (denied) as an interi.m water BoLLt CL' . ~ ' - ' - Purveyor`e Name Signature-'& Title Date vOatl 'PART Iu - TO BE COMPLETED HY SPOKANE COUNTY HFALTH DISTRICT A. Health Diatrict staff ha8 (has nrot) completed a field investigation of the aite. B. Hea t District requirelaents for prellminary plate have (have aot) been 7T;.4~at" Tit e Wu~~ Dat3O ~ at~ , ,iPAR~~ - TO BE COMPLETED BY C~~ ENGINEER' rF CE A. County Engineer' e Of f ice requirementa f or preliminary plate have (have not) been satisfied eubject to eubmieeion b approval of drainage calculatioas and draiaage plan. ~ Signature ~ Title Date ~T V - TO BE COMPELTED BY COUNTY UTILITIES DEPARTMF.NT A. Count Utillties Dep r t requirements for preliminary plat have (be-rr mo n sat " ; ~ ~ in-a t eA' tle D te PART VI - TO BE COMPLETED BY COUNTY BUILDING & SAFETY t~ c- 2 t= , .2E t L:~ 1 t 2G M`f c-L.~T C~ A. Fire flov of gallona per minute required for propoeal. ~-Signature~ Title Date ~ - t ~ • ~ _ • PRELIMINARY SUBDIVISION CONFERENCE: For: Phone: 7 4 Address: ~ ~ City State Zip Location of Property: ~ The foliowing information must be submitted prior to acceptance of your application by the Pianning Department. SUBDIVISION APPLICATIOI+L_(all signature blocks completed). LEGAL DESCR(PTION of original parcel to be subdNided. 3 COUNTY ENGINEER SECTION MAPS (property outlined in red) - 3 copies ~ ~ CQUNTY ASSESSOR'S SECTION MAPS (property outlined in red) - 4 copies a. Four (4) copies of maps are required. Only one map or set of maps is necessary for the adjacent parcels within 440' of applicant's ownership. pRELIMINARY PLAT MAPS: Submit eight (8) copies of the preliminary plat map prepared by a licensed Land Surveyor. Scale 1" to 50', 1" to 100' (or location of all existing structures, existing septic systems, existing and abandoned well sites, natural features such as wooded areas, streams, drainageways, ridgetines and hilltops. Topography information should be included if any slopes on site exceed 10%. Also, the map should show the Iocation of any easements (existing or proposed) and utility lines along with the location of the nearest fire hydrant (if applicable). The design of the preliminary map must conform to approved plat format standards. c4 e ENVIRONMENTAL CHECKLIST: Fee required - $75.00 ~ COLOR SLIDES: of propeny and adjacent lands. _ BLACKIWHITE REDUCTION OF PRELIMINARY Pt~AT: (One) 1 copy 8 1/2" x 11" or 11" x 17" in siie. , r PRELIMINARY P! AT FEF.,: (7* CL"ll d ' 4;~'~ Environmental Checklist • $75.00 Planning Department- "`reliminary Plat review $330 +$10 per lot - F;nal Plat fee $7 per lot (subject to change) County Engineer- Preliminary Plat review $200 +$5 per lot - Final Plat review $200 +$10 per lot Health District- $75 + $8 per lot. 1 0. LAND USE PLAN: ARTERIAL RQAD PLAN: UN I NQ: Present - Proposed - PROPOSED USE(,s): 11. COMMENTS: THIS DOCUMENT MUST BE RETURNED WHEN APPLICATION IS SUBMITTED. Date SUBDIVISION ADMINISTRAT4R . U , . ~ ~ / _ ~ . ~ ~ eie NE Midilome, Inc. E. 3144 - 29th Avenue ~ ; O n M ~ ~ "`~SA Spokane, Washington 99223 N (.0 W _ 25 MAR Is NIL - 'y ='~•Y ~-..n.~'~~4„p,~ ~ R ECEI Mr. Doug Adams ~1AR ~ ~ Plat Administrator (3 1988 N. 721 Jefferson Spokane, Washington ~F~~A~E ~~UN~r NING DEPqh'TMEN T 456_2274 014E 1,10 ~ . - , $ , p A.~= 140 9 : ~ ~ ~ = - . ~ ISS~QN 301, 19? ' .dttac~um. R°°m 19?8, G COM' epa~~en ~~T t Au QY ?rlealth D e c Cou ti.~01 Golle9 Vi es . ►e: Cp,Ti.O~ ~ . ce; ~ C'S~I~ ► SIQ• ZOVE ~ ~ A~ Su~►~~ ~~~~t~ ~e~ enti ~ ~,dl.lort'e F~rst~ gtn3~e Fa.rn~l ( ~ ~ 13 l ~0 1t ~ ~ ..7 $ ~ ~,-ta"" ~7g p, r~`cu l oo .L,l ~►,P~ ~ '•-~r,1y.. r+nr~ ~ . . . : ~ ~s. Sr ~ • •~,~i,' • _ ~t c ~ : s ~u+ r r ~ ♦ ~ t. ~ ~ _ . ~ ~ ' : ~ ` .n~ v '~r,. ~ r.• . i t' ; , ! a •a' . • ~ ` ` •:r; 1' • • ~ 4 't ~ ~ ~ -,r . il~ ~ 9~ f s ~ ~ ~ J . s ~ ~ • . 3 ~ ' , s w . ♦ • i ' E . . ~ • ~ . . . ~ . ~ . . ~ ~ ryti, ~ ~h . • , a ' Qv ; 2~, ~ •4 , • • . ' ► ~ • . . • , • , ` . . d rN~ a ~ ~ . ~ ~i; ; '~~k f~ t • ~ ~ " : , ~ rr • ' r . ~ ~ '1 t~ ` • T • , , , O ' 4~ , ~ ~U ,~.4,~ • ~ . _ ~ Q ~ ~ 'r • , i ,n • ` . ' ~ ~ i 4pp i / . - • ~ ~ ~ , . . • ' ' . r ; ~ '~tM . , ~ • AO 1 ~ • w M ~ • • - ~ ~ - . AGEENDA,. .MW-41i. 30, 1978, ,--TELEPHONE' NO.: 456-2274 SP4XALNE q-OUNTY PLANNING COMMISSION Tlme: . Thursday,• March 30, 1.9789 9:30 A:M. P,Lace: • Count.y. Health Department Auditorium, Room 140 We'st* 1.101 College • PRELIMINARY SUBDIWSION ,AND ZONE RECLASSIFICATION9 , CONTINUED ITE-4 3. PE-1168- 78, Midflame Ff.rst Ad3ftion . ZE- 13-78r Aarfcultural to Slnqle Famtly Residential , a o Iocation: Section 3 3, Town ship 25 N.a, Range 44, E.W. M. That portion of the NE 1/4- lying NEly of the 'following described Itne: Begin at the N I/4 corner of saLd Sectlon 33;. thence S 890 470*E along the centerline of 32nd Avenue, a distance of 820 feet to the NE coraer of Midtlome. Ad3itlon; , thence S 00 06' 10" E aYong the E ltne of sai'd Mldilome Addition, a distance of -477 feet; :thence N 890 47'W a distance of 30 feet; thence S 0006.' I"0 "E a distance of 195 feet; thence S 86045'20"E a distance of 76 e 15 feet; thence S 6810 -50' 1-2" E a dtstance of 137 0 51 feet; thence S 4013 24' 4'0'" E a, distance of 50.4I feet; thence •S 470 47' E a dtstance of 650 feet; thence S 50° 361,27" E a d'l.stance of 97.41 -feet to the, beginntng of a curve concave to the LNE with a radius . of 1131.82 feet and a central angle -of 37022"18 thence SEly along the arc, a _ distance of 738.24 feet to the end. of curve-; thence N 890 341E a distance.of 389,17 feet to the E line of said NE 1/4,o except the right of 'way for Ptnes Roada Also except the riqht of way for 32nd avenue e b o Sponsor. Midilome, Inc o ' West 606 Third Avenue Spokane, WA 99201 c o Eng tneer: Clarence E e S Impson Engineer, Inc. North,90-9 Argonne Spokane-, WA 99206' d-, Site Size: 49 e 8 acres e o Number of lots: 138 fo L-and use ptoposed by sponso . Single Family Dwell'inqs g. Exlsting Zonlrig.: Agr•icultural,. established April 11, 196 9 ha Advertised, Zone Reclassl-flcation: Slrigle Fanally Residential I o Water -Source: Model j. School Dlstrict: Ceatral Valley School, District ke- Method of sewage disposal: Individual on-slte disposal systems lo Environmental Impact: A'topic of discusslon at this hearinq may be whether or not thls .proposal taitll ha.ve a signlficant adverse envirorlmental inipact. ('VICIrIITY MAP O1V FOLLOV1tING PAGE) . . . ~ 5 _ • ~ 1 ~ 00CUMEW LpC~_ ~ - File Q ppp~ i cant f Date -'tartQd - - Rece'~'40 ? Q~tg . - ID# - j7 . . 1 ?L . , ~ - ~ '-wo~ (1 - 1 ~ ~ - 12_ -9 _ , 1~ - tf L-- roo" - - - ~ ~ , ~'-~Saa - -yu) . -?4 70 p. . . . . . ► f ZONTNG AND LAND USE FEES ~ _ RECEIPT IYFORMATION Date: ~ File Number. ~ tiarne: Phone Number: ~ r Coml)~ny Nam (if applicable): Adciress: City/State/"I_ip: c% F'EE 1NFORMATION Item ltem (multiplied by (equals) # Description Amount # of Items) Tota! v . / s ~ ~ ~ ~ / . ' , .I 1 ~ ' ~ ~~i . "l ~i J~ ~ TUTAL AMOUNT DUE Transaction T99 - f3y: Receipt ~ , . - ' • ' . ' " ~ \ ~ - . ~ . •f ,`r . . ~ • ~ 1 I N0. 79 1077 . _ , Li M- OR-E_-TME BOARD OF COUNTY CaMMISSIONERS aF SP,QKANE C,OUNTY, WASHIIV(3TON. _ _~..~p68~=7$ PE- ~ . ) I'N THE- MATTER OF F I L-I NG THE- FJNAL PL-AT ~ OF MI-DILOME FIRST ADD'ITION LOGATED IN ~ SECTION 33, TOWNSHIP 25N, RANGE 44, ~ R E S 0 L-'0 T I 0 N E.W.M. ) SPOKA(UE COUNTY,, WASH,INGTON ) ) ) ) BE~ IT RESOLUED BY THE BQARD QF' COUNTY CQMIIMiSSIONERS OF'SPOKANE COUNTY, I49SHINGTON, thdt th'e -final plat 'of , • MIDILOME iFIRST ADDITION (former.ly Chester. Addi.tion) . _ - . Portion of the NE *l/4 of Secti,on 33, To,wnship 25N, Range 44, E.W.M,. Spokane County, Wa s,h i ng to n. -rnor~ pre;cisely described in -the plat dedication; on the "recommeriiiation of the Spokane Coun-ty Planning Commissioll, be, and the same hereby is -approved, with the exception, th'at the public ,r-ights of way dedicated in tYiis plat will not be established for inaiiltenance purpose.s until the County Engiri`eer h'as certified that the r.oads have been impY•oved to, County standards and.approved by aseparate resolution a.f the Board of Co.uli:ty Commisbioners. PAS,SED BY THE BOARD T,HIS .3~ DAY OF 19_ 7Z r/ BOARD OF COUNTY C014MISS-I4WERS ~ OF SPOKANE COUNTY, WASN-INGTON . - . . RAY W. CHRISTENSEN, CHM. • HARRY M. LARNED -ATTEST : VERNON W. OHLAND C 1 e f t he 'a d 8y•. _ I I i . . .J«..~"/O!~•+~. iw^f,"j.ylt~' ! . ~ ~ - Af A1. FLAT CI$CC:K LgST ~ - Co e ~ iq t 2. Suudivimun itdiiiu - . 3. 5e-i:tion, 4. Spo~igior(s) l b) ~ ~ - ,S . ICIAgdndCr ur sutvdYot 6. 'S~ew saxd 2AWX .36" 7. North point, acalu (100• - V or 200' ~ . Bounda~y L,n~ 69h 9. Locataon 6 w,idths of propoised ateeots, ,alley.s, rights . ,of wdy,, oasdonbnts, posDca, open spaces, & p~oper labelany og xpac,ns to be dedicated to -etae, publac _ lU. l.ayout & adaees of adJoirelng subdflvisdons Ok _ a.. RoNl;itis -Ldyout 8 ldam'd Of tho nplat sha1l te uilow'n by dashad le'etoa ~ K l 1 . -Sureet t.idenu-s - cunstbtent vdith exasting, sireeta i-n city 4nd,cuuniy. - Check aqginst naRtes on rvund nnme wt~ee'l. - - 12 g.ot eiaes - e .e. , d0°X 125' wlth 10, UUO sq. It. tOr 8llag1s tdmily lpt Cui Do 3~~s 804 at bual'diaiiy lane . 1 .1. Layout, numbar.%,and dlllidnslo11.8- of lOtB 6. IpArcdfl s OK 14. Neces8ary rnymeeiriny tldtA _ 15. Uoes daciiu'dtio~~ stdtu ii lr►vtvivual watdt, ancl/or pubiic- s-ewcrs 'w,l> W Nrovtddd in a►ccor,,dance - wieh prellntlotdry plilc of approval. ~ m . HoLdl/iev cumlic;atiun by a prog6sbeuncal land -lusvey'or. 1?. t's~vdtn re btr tc;tlons a~~Y 1 b. NLtinte't dnd typp ui un~ts ~ . 1 y. D*ciAcatiun r,t ytrdrits to the Nublic ~ 'lU . Edsb"m vrj-1-!-1c#jtgon ~ ~'l~uytr~taon - . power . 1K. 'll G~tiu - ck eesnmullt:j, ciouc1s on property, dti; . _ fruin Titlm It`:Noit ~ - _ . . , - • - . 1NLAND POWER & LIGHT COMPANY July 25, 1979 Spokane County Planning Commissi-on K. 721 Jefferson Spokcne, Washington 99201 Gentlemen.: This is to advise fihat' adequate,- easements have been secured for the installotion of electrical servi'ce fio Midilome First Addition in S'ection 33, Townsh i p 25 North., Range 44 E, W. M. If you have any- further questions, please feel free to coninct me. Very truly yours, INLAND POWER 8 LIGHT COMPANY Irene A. Dunsmore Field Engineer IAD :ds Et+S7 320 SECONO AVENUE- SAOKANE.W:ISHINGTON 8-9202 PHONE 1509I;747-7151 I . L.AW OFFIGES DLLLNVU, I:UI)OLF,'& SCkI.12UEDLR, Y S. ROBERT D. DElLWO 1018 Ol'D NATIONAL BANK- HUILOING KERM17 M. RUDOLF SPOKANE.-WASHINGTON 99201 RlCHARD J. SCHROEOER- TERRY W. MARTIN (5091 624•4291 TERRY T. GRANT HEDIEY W. GREENE ROBERT J. ROBERTS July 25, 1979 Spokane -Co,unty PIanning Commission ' Spokane County. Co,urthouse Spokane, Was,hington 99201 Re: Midilome First Addition Gent,i emen: This is to advis,e that the lands in the above-referenced addition are. wi thi n the exte.rnal boundaries- 'of and wi 1.1 be provi ded wi th water se)rv.i ce f rom Madel I rri gati on Di s tri ct No. 18. Pl ease refer to the a•ttached 'copy of our l etter- to you dated Augus.t 22-, 1978 and rel ati ng to ttii~s s-ame matter., Thank you. Simerely ~ - RJR j-b Robert J. oberts Secretar,y Model Irri gat' n Di s tri ct #18 Enc. - - . ' • • Y' • __1 79 02G4 BOARD OF C:OUNTY C0MM I SS I ONERS OF SPOKANE C.OUNTY, IdASH I NGTON F I ND i NGS AND. OftDER REGARD I PJG PREL I M 1 NARY PL-AT PROPOSAL- AND ZONE RECLASS I F I CAT I,ON , PE-1168-78, MIOILOME FIRST'ADDIT'ION; ZE-13,-78, .A'GRICULT.URAL-. TO SINGLE=FAMILY' RES,1 DENT 1 AL . WHEREAS, The Spokane Coun t.y P 1 ann i ng .Comm i s.s i on d i d, a f te r pub 1 i c hea r i`ng on Septe,mber 21, 1978 (cont i nued to S,eptember 28,19)8) 'fo,rward to the Boar,-d of Coun.ty Comm i ss i one,rs a recommenda t i on t,hat the P re 1 i m i na ry p 1 a t to,be known as, M1d i l,ome F i,rst Add i t i•on (PE-1 1,68-78) be app-r.oved,-and, ,WHEREAS, Joan Honican, S 3904 Bowdish Road, did request;a-special hearing bef,ore the Board of 'Count-y Commis*sioners to pr'esen't evi,,dence and te'stimony agai;nst the recommendat i.on of `the P 1 ann,i ng Comm i ss,i on to approve the above-descr i bed p:re- liminary Plat and zone r,eclassification; and, WHEREAS, The Board of County Comm.i s's i,oners d i d'hal;d -a publ i c hear i'ng on December 11, 1978, to "c.ons i der the recommendat i ons,of the Pl ann i n.g,Commi:s,s i.on and testimony and request of the plat sponsor, pbjector.s, and other interested part,i'es; and, IJHEREAS, at aa i d hea r i ng oppo'etun i ty was a-f forded tho,se fav.or i ng and those oppos i ng, the -above-descr i bed prel i mi nary pl at proposa 1 and zone rec-1 a'ss i: f i cat ton, the Board of Count.y Commi ss i oners of' Spokane County,, hav i ng ful l y cons i der6d 'the test i mony g i ven , the records and m i nu'tes of "tFie P 1 ann i ng Conim`i'ss i on', the. Env i ronmen:ta 1 I mpact S ta temen t and a 1 1 o:the r ev i dence p resen ted ,'and f'u r t he r hav i.ng, pe r-sona 1 1 y acqua i n ted themse l'.ves 'w i th. - the _s i te -and v i c i n i ty i n ques't i on, does- 'hereby 'f-i n-d- that the -con- cl.us'i ons of the P1 ann;i,.n9 Comm i ss i on were gene~ra l ly ~va-l i d an,d suffi c i en t, and, NOW,, THEREFORE, The Boa'r.d of` County. .Commi,ssioners does, conc;l'ude tha't -the p're 1 i.m i na ry p 1 a t to be known as M i.d i lome Hr s-t Add i t i on and zone rec 1 a s s i f i.,ca t i"on upg,rad i'ng to S-i ng,l e--F,am i 1 y Res i den t i a l. shou 1 d, be and hereby i s approved, sub j ect to -ttie 5_taf f F i nd i,ngs and tond i-t i ons i'n -the P 1 ann i-,ng Comm,i ss i on; .M;i,n,utes and PROV I DED, tha,t tKi s approval shal 1 be° subjecf to the.approval of al 1 other state, fede,ral and, 1 oca 1 agenc,i-es w i th j,u,rtsd i ct ion.. DATED TH I S f.3 DWOF ` ~ 9~• ~ BOARD OF CO~J~JT:?~•::EO~M~h! 96 1 OIdERS OF SPOKANE C4UNTY, WASHI,NGTON aAY- W r.UR1STENSEN. eHl~~ 1ERRY C. KOPET , . - - ~ ATTEST : VERNON W. `OHLAND ~ C l,e r k o'f Boa rd . . 'By : ~ ~ . . . , ~ . • J . f y ~ ~ . ~ ?gp9 ` 19:v ' - ~ - u\ ~ ~ IlarS,~' -~1 - - I . ReceiV~e~ From ~j 1~ v~- ° -c~~ ~ ~ ~ ~ r ~ ~ ~ F'or` Ht?W~pA1D- -SPOg~ ~^i A~COUN1 ~ii; CHECK . gjI . . ' Qe~~► . CE eaauE - . - - ~ . ~ . ~ . ' , ' • . r _ F ~g~ 79 ► ~1a 114 THE BoARD OF CouurY coMMIssIoNERs oF sPvKANE cavNTY, wAsIUNGToN zE-1 3-7s ~ ~ I1V THE MATTER OF CHANGING THE ZONING ~ MAP FROM AGRICULTURAL TO SINGLE FAMTLY ~ R E 5 O L U T I O N RESIDEN'TIAL ON PRQFERTY Lf)CATF.U IN ~ SEC'PION 33+ TOWNSHIP 25 1V o, RANGE 44, j E .W. M. , SPaKA11TE COUNTY. WASHINGTON. ~ ~ The above--entitlsd matter carning on re+gularly for heaxi.ng hefoae the Soard of County Comrnissioners of Spokane County, 11Vashington, an this day, and it appearing to the Baard tPaat the Spakane Gounty Planning Cornmfssfon has given due natice of the hear- ing on the rnatter in the manrier and for the Ume provided by law; that said Planning Commission has held a public hearing as required# and that the said Flanning Cam- mfssion concurs in the plan ta zone the foilowing desc.riberi praperty as: SINGLE FAMII.Y RESII]ENTIAL: All that area platted as Midilorhe First Addit-im, located in Sectian 33, TownshiP 25 N., Range 44, E.W.IV!.,Spokane County, Washington q N4W, THEREF'ORE , BE IT RESOLVED, that the above-described property be, anci the same hereby is zoned under the classification of SIi"kTGLE FANiILY RESIU£11dTIAL as de#ine3 in the Zoning Ordinance of Spokane Caunty, , adopted Augus t 25, 1953, a s arnended. AftD IHIS A9 T3AY OF ~ a 19 79. PASSED. BY THE BO ATTEST: BQARI] OF COiTNTY CQMMISSIOIVERS aF SPOKANE C OU NTY, WASHINGION {I L RlY OiY Y1► i OHL/`7.ND Glerk of the Bodrd By: r V~~~Deputy RAY W. CHRISTENSENi UHM. This is tvi certffy that this is a true and ~~~~Y corre~ct capy of Resolutivn N0. 1.2 -7'7 pdssed by the B o r~l thi s day of By: I De pvty I ~ ~ , - ~ U.S. ENVIRONMENTAL PROTECT JN AGEPlCY ~t~ sX4r R E-G 10 N X • 12'00 SIXTN AVENUE us SEATTLE, WASHINGTON 98'101 . Z ` ~tif4t PAo,EG1 AiTN o° 'M/S 409 . u U i 1 Mr. R. C. Br'inck Act ing Service Of f ice Supervi sor Department of Housing F Urban Devel-op2nent tiVest 920 Riverside Averiue Spokane, washington 99201 Dear W. Brinck: ° This confirms telephone conversations (Septanber 25 and October 13) be:tween Harold .Scott., a member of my staff i and Mr. Robert Giesa regarding. housing proj ects in 'the Spokane Valley-Rathdrm Praiiie Aquifer ar-ea. Those proj ects : considered acceptable should not contaminate the ground water to a level which would cause a significant= hazard to putilic,health for those people us'ing the Aquifer as a drinking water source. The status of the projects is as follows: Acceptable: . 1. Crick's Subdivision, S.P. #382 2. Simpson's Addition to Greenacres, S.F. #377 In accordance with our Menoy andi,nn of Understanding, we are requesting addi- tional review time for th&!Midlome First Addition, S.P,. -#-373, and Homestead Addition., S.P. #380 projects.. . I hope this infor-mation is, helpful. Your concei-n and inteYest in protecting the.Aquifer are appreciated. Sincerely, ~ L~ y/ • , William A. Nbllen, Ch=ief - Drinking k'ater Programs Branch cc: LoJose Urcia, Spokane Regional Planning Conference, A-95-Clearinghouse Ralph Mi-ller, VA, Seattle lti'arren Ness, FmHA, jti'enatchee E C E I V E ~ QCT"I; 31',978 - SP4KANE COUNTY PLANNIIRG DEPARTMENT 140. 470 BEFQRE- THE BOARD QF COIJNTY-CaNMI5SIONERS OF SPOKAYdE COIINTY9 MMIAT(3TON. IN THE MAL~1ER QF THE RECO `~M@~NDATIONS ~ FROM TEEE 3P'OKANE COUNTY PLANNING C0MISSION ~ CO►1CERNING T~ C(~NII~+lISSI~i' S AGENLIA, IaATED ~ ~L~I~ MARcg 30, 1978 ) . ) W~BEAS 9 the Board of County Commi ssionere of Spokane Couaty, pursu'ant to the ° provisious of the Revised Code of Washington, Section 36.70.620, ehell upon recei:pt of any, recommended official control or amendinent thereto, at its -aext , regulsr public,meetiug set the date for a pub'1_ic meeting ibere it msy,, by ordi.naace, adopt or rej~qct the,offic.ial control or amendment; and WI~AB, the Board of County Commi,ssionere of Spoks,ne County, did by 8eaolution No. 78 433 acknowledge receipt of the recommendations frot tbe Spokane-County Planning, Commieeion concerni:ng i.ts Agenda, d"ated, March 30, 1978, and, , the Board of County Commis6ioners of 3pokane County., did by eaid resolutionset this 13th day o,f April to consider tlie recomtnendatione of the Planning Comtniss;Lon concerning its March 30, 1978 agenda, a copy of eaid recominendations are attaohed hereto and incorporate'd herein by reference. ° NOW9 THEREFORE, HE IT RESOLVED by tfie Board of C,ounty Commissioners of Spokaae County, bdashington, that baeed upon the information available to the Board aad* the tee,timony at- this meeting the following action Was taken: 1. PE=1 OS?=7? - SidAN ACRES REPLAT # 1: , SWAN ZE- 47-77 - AGRICULTQRAL SUBURSAN T0SIN(iLE FAMILY RESID~IIJT~IAL The Board concurred with the PlaYining Comtnission's reconnmendation to approve the extension of time. 2. PE-1 Q90-77 - FOREST GREEN SUBDIVISION RFPIAT #1: irtARD ZE- 50-77 - UNCLASSIF'IED' TO AGrRICUL'14RAL SUHUHBAN The Board concurred with the Planning Commission•e recommendation to approve the exteneion oP time. 3. PE-115~=77 - NQRTHWOOD 2ND ADDITI ON': ANDERSON _~ZE= 1 tS3,=?? -.A(iRICULTORA,L TO SINGZE FAMILY RESIDENTIAL Having received a communicat'ion in disagr.eement with-the P,lannin Commigsion's recommendation for aPP " roval, the Board_ set a date of at /:4p o;~W of said day ta furth r consider the matter. 4. PE=11 ~5-77 - NORTHWOOD ~RD. ADDITION : GUNNING ZE= 19~-77 - AGRICQLTUBAL TO SINGLE FAMnY RESIDENTIAL Having received a communi cation in di Bagreement_ -wi th t e Plenn~i}~ g Comm ' esion' s recorgraendation for approval, the Board set a date o f at BG' of said day to furt .er consider the raatter. ~ 5. PE-1 `168-78 - MIDILOME, FIRST ADllI--TI ON : NCtDILOME! INC. ZE- 1~-7tS - AGRICULTQRAL TO SINGL`E FAMILY RFSIDIR?AL. The Board concurred with-the Planning Commission's recommendation to continue this pr.eliminary plat to a later date. 6. PE-1172-78 --NtICA PARK : C. FRITZ, NELSON ZE- 17-78 - AGRICIILTDRAL TO SINGLE FAMII;Y RESIDENTIAL AND/OR MULTIP2.E FAMILY SDBURBAN HE►ving received a co~rununication- in di-6agreement wi th t e Plarm.ing Commission's ► .recommeridation for 'approval, the Board' set a date of a t _ dD Arl~ of sa:id day to furt r- con_sider 'the dsatter. ~ - ~ . ' ,A ~ J I ' ^ i. iv - PE--1161-77. - SUNSET NEADOWS SUBDNISION : SWAANSON CI0 G8NWOOD RFALTY ZE- 20~-77 - AGRICiTLTURAL TO• SINGLE FAMZLY ]RESIDIINTIAL The Board concurred wi th the Planning,Cocanission' s recommendation to de"ny tbe pr-eliminary plat witY►out prejudice. - 8. PE-11 ?0~78 - COLUMBIA PARK 1 ST ADDITION : BONI7CCELLI -ZE- 15-76 - AGRICULTURAL TO SINGLE FANiILY. RESIDENTIA,L Baving received a communication in dieagreement with tfie 2la.nning Cammiesi;oa's recommendation for cont-inuance, the Board set a date of ~ y/1~~ -to `furt%~ h E~~consi der the at d DD . ' J~~,• of said daY ~ matter. y. PE-1 'I 8=q8 - FONDRA PINES 1 ST ADDITION : 1~OI~'•LAND. INC. ZE~ ~3-7tS - AGRICIILTURAL TO AGRICULTURAL SUBIIRBAN AND/QRSIIdGLE FAKILY RESIDEN T?AL The Board concurred with the Planning Commission's reco4unendation to coatinue this preliminary plat to a later date. . 10. PE-117 -?8 - NaR-T-HCREST ADDITION : WQLFLAND! INC-: ZE- 78 AGRICULTURAL TO SINGLE FAMILY RESIDENTTAL The Board concurred with the Planning Commissi:on's recommendation to continue this, preliroinary plat to a later 'date. 11. PE-1180-78 - ANCHUR SECI]RITIES -NO. 5, REPIAT #1: PIOXEEB HCHES~ _INC. ZE- 45-7$ - AGRICULTURAL TO AGRICULTURAL SUB[JRBAN The, Board concurred with the Planni_ng Commi6eion's recommendation to appr-ove the preliminary plat, subject to the conditions as contained in the minutee of the Pl.arining Commission's hearing writh considera'tion of the euvironmental review. The Zoard,also concurred with the Planning Commission's recotacnendati.on to zone the prperty to the Agricultural Suburban 'zone :upon the .filing oY the finel plat. The Hoard took no action on the r.eeolutioa and tnap pending the filin;g of the final plat. 12. PE-1181-78 - VERA VIEW ESTATES :MC MILLAN ZE- 4E'i-7~S - AGRICOLTURAL ~TO AGRICULTURAL SIIBURBAN AATD/OR ~SII~GI;~E FA~9ILY RF~SIDENTIAI~ Having received a communi.cati.on in,disagreement with the Planning Commission's, recommendation for denial, the Board se"t a-date of ~ /-r at , of said da~r to fur~t~r consider the' matter. 13. PE-1182-?8 CASCADE HEIGHTS ADDITION : MC,CLOSKEY ZE- 47-~8 - SINGLE FAMILY RESIDENTIAL T0 MQLTIPI.E FAMILY SUBIIRHAN, The 8oard -concurred wit-h the Planning ComtiisBion':s re'commendation to continue this preliminary plat to a later date. BE. IT FURIM RESOLVED that the Hoard hereby suthorizee its chairman to siga I'inal. Declaration of-Non-Signifi cance -for each item approved above, subject to. compliarice witti' the 3p6ka.ne County Environmental Ordinance, Subsection 11 .1,5.344. . BY THE ORDER OF TiE' BQARD THIS DAY QF G • 1978• BQARD OF"CUUNTY CCMMZSSIONERS , OF -SPOKANE COUNTY 9 41A3H INaTON IMRRY M. II , . ~~RISTENS~ aTrE.sT : .ET VERNON W P[LAND • ' Clerk , he Boar . BY • . Dep ty , _ . r . , -ZONE RECIASSIFICATION OR PRELIIVIINARY SU_BDIVISION P6- - ;e; 7 ` - - ~ , - - j ACTIO'IV TAKEN (FP7ROVE ~ 3a, 19 7~ r~~ - ~ DEW , r'COINTINU,E LEVGTH OF CONTINUANCE . REASONS 1. . 2,. 3. 4.. CONDTIONS Subject to the .Conditions• as contained in the. Plan-ning -Staff'-s Findings, Dated , and subiect.-to -the ai3ditional conditions that 1. 2. 3. VOTE Motion by . Seconded b.y VOTE YES N.O AP 4 1~.. ~ ` • ~ ~ • ' / C ...~i~ 1't t ~ • 3113178 A CA W rC~ ~ ,f- Qh C ~1^~ j~ C/r J, ' C~d7 r' C:,t7 r~~►~`~`'4~( q(~~~/ S~j.- J~ L~ Al~~ °2-~~- ~ d,b r"r-7~ ~~`l~.►~-.,~5 ~/r36~hr vt l~~ - S 6 4 -S 4:► - ~92-Ao Ov- As. ~ 7-L-7 'r ~'j ~ ~ 0 Lo/ e-7 tr to, ~ ✓ ~ ~ f ~ ~ ~ ~ A*.O 4-0 Y _ I I Qrc WA ~ YWWU4 (;V. ;C W k4 , . . a5 V.7,o,2 ~17 ~ -21 C'.u~'r • . o,& . 31~ 1 ~ W-oodS w #0.000-0 ro-4IIIII& AO? ~00*r . ' ~f►~r~G~ ~ /n o~ ~ ~ CH=: LAND FILE f PO L L- CARDS 0 ZOB 050201 IAND FILF uCRKSKW FCR R.I.D. RBQ[ES?SD BZ Q JOn 053202 PETITION FCR IACJIL IWROVFiIENT , PHONb 0 JOH 030203 ObiHMHIP & IECJIL DESCR. LIST DATS Q JaB 0502^4 COIINfY RIGHr-GF-WAY ACXsNT IS LI3T Pa+OJ= x coGE SEC. ;r R. p, aLK,-LoT K q ~ Z 4 S~~ 7 3 io 13 11 i~~~ 9 i m-t-2 l 7-,-~ . - , - ~ , . ~ G Ka h • ~ v_ a rucon~ ._G~ ~~CA _j col. 1 iquota merk ( numerir. I~J `7 M A. l 1 I I col. 1 ie a quote mark (nume,-tc cols. 2- 4 ia conetant "69 cola. 5- 13 ie numeric vith Jblanke ac:swptable. • 'I?) Do not zero fill. col. 14 is a quote me►rk (numeric ~ Nots: Plinch the 99990,9999 enrd as the vnry 6 9 1 UF lnst card oP ajob, i.e., do not punch one for avery pngs. if there are multi ple pages. : , s69 1 , 1 I-j- d~5 w3 1 3~ 9 t 31315 ;4.1 0 -jk 2 ~ib , ' G9 l~iJ~c"~ ' Cod...i.rig enm2 e " " 5EC, r, R. Q. e1.1k.=LOr ~ 5 6 1 2~ 10 13 ~ i`1`1 r`~ 3.2=41i-J 0 1 Parcel number 32541-0801 only ~v ~'fp 9 113 3,5, PnrceT rnunbere 32541-0800 thru 32541-0809 G 9 1 13. i~,`~li•`1,b ~S . 4-OPnrcel numbers 32541-0800 thru. 32541-089g ~ ~O X& 1/4 ot aec. 32., twp• 25, rg+s. Z,~,~,~.~ - l1~✓ All of eec. 32, trrp. 25, rge• !«4 1 ~ ~ A lT of txp. 25, rge. ~ 44 _ 1 ~ ~ . _ ' , _ , ~L~~,~.~~ - ► , ~ All of rge. 44 • ~ Sectfona vithin Toanehi e 06 051 p 02 01 07 ~3 09 10 Il 12 1 1811"11~b1151 1 2012I!22 2 0 291281 6 2 { ~ • ~ t'~',, ~ _..31 6 . . 691' - ~ . b ~ 11 : ►i ~ ~ QiSrter eeotions rrithin rsection 6 9 1 3 4 ► . , _ f99 t , - ~o, i ,":D LL ; ~ • ~ i ~ /ooff 5POKANE VALLtq FIRE DEPARTMENT EAST 10319 SPRAGUE AVE. • SPOKANE, WASHINGTON 99Z06 • TEIEPHONE C509) 928-1700 March 21, 1978 Mr. Fred Dayharsh, Pl anni ng Di rector • $pokane Caunty.Planni ng Comi ss i:on North 8] 1 Jefferson Spokane, Washington 99201 Dear Mr. Dayharsh: The fol lowing prel iminary u i i ions and zone classification for upgrading has been revie d f r i e protection: . . PRELIMINARY SUBDLVISIO EXTBNSIO F TIME . PE-1087-77 Swan Acr s eplat #1 . ZE-47 -77 Mains a d ydrants need to b installed in this area. PRELIMINARY SUBD I I. S REC I ICATIONS: PE-1168-78 i 1 s 'tio ~ M , ZE-13 -78 M i and~y a ee tq- lled in this area. , ~ PE-1172-78 M'c P rk ZE-17 -7 i d hyd ` to ~ins 1 d in this area. ~ PE-1161 7 un ~e ead ZE-203 -7 s nd h al ,e i this area. P E-1 8- -78 cho r N o 1. - a t# ZE-45 ~ I~ ° s ~fed in ~ is area. ,3~~ ns PA-,j 181- 78 e ra 46 -78, Mains install in thi rea. ~ y t ~ . j • ~ .~p _ _ a L:--ef-4-ns,pee-t~ors- ECEIVE AC : sn MAR 2 2 1978 . SPOKANE COUNTY PLANNING DEPARTMENT yM 1 PRE YENT FIRES SA VE LI VES - l OFFICE OF COUNTY ENGINEER SPOKANE COUNTY, WASHINGTON Dato Mm2C4 19~ anter-offite Communication To PLANNI NG COMMI S S I ON • GAAY KENNALY, PLANNING & TRAFFIC DIVISION ENGINEER/~((_. jrom ^ . SYb~wt AoAD GQNIIITIOn * FDR • *C,C}NAITIONS CIRCJ..Ell qPPLY TU PLAT UNDER CONSIDERATION . 50 that conditional approval of{ the plat fs given eub3ect to dedication oF R3.ght of Way to the puSlic and approval of the Yoad systea in the plat by the County Eagiaear; . ehat plans, profile9, and cross 9ections showi.ng propo9ed street centerLine aad curb grades be submitted to the County Engineer for approval prior to constructioa aad the filing of a final p1at; • . . . . ~~-that drainage plan9 aad de9lgn calculations showing the grade9 aad aligament of drain- age facili[ies be submitted to the County Engineer for approval prfox to coastxuCtion a:►3 the filing of a fiaal plat; . ~construction within the proposed public stYeets and easements ahall be parfomed under tha df.rect aupervision of a licensed land surveyor, who shall be reaponsible $or perpetuating all evidence of the location of survey monuaaents which "y be dis turbed during construction and who shall futnish the Coun[y Eqgineer with "As .Built" plaas and a certificate in Writing Chat all improvemeats were installeci to the lines and grades shosm on the approved construction plans attid that al], divturbed montraants have been replaced; ~ no cunstruction work is to be performed within the Public Right of Way uatil a permit h=s oezn issued by the County Engineer. All work is subject to inspectioa and approval by the County En3ineer; D-6all construction within the Public Right of Way is to be comple[ed prior to filing the f inal plat or a boad in the atnount es tis.ated by the County Engineer to cover the. eost oi coustruction of improv2ments, construcCioa certification, "As Built" plans, and ^-.on:on9nting the street centerlines shall be filed with the County En,gi..aer. a 7-no direct acceas from lots to 1/2 right of ways until such time as additional right of ways are dedicated and roads are established ae County Rnade. ~ F- o direct access from lots to Stub Road connections until euch roads are conatructed ` to County Standards and established as County Roa ds. n---9oad dQSign, MOM ~ construction, and drainage control for 1/2 rights of waye and Stub Roed connections are the reaponaibility of the Developer. ~ kO-that the Sponsor shall prepare end aubmit to the County Engineer a design proposel eccept- eble to the Sta[e Higtiway Department of the proposed Stete Highway-County Roe d inter- section. State Highway DepertmenC epproval of the propoaed design must be received prior - to the filing of the final plat. Improvements to the State Highway are [o be the respon- sibility of the Sponsor and mey either he conetructed or e bond to cover the cost of such improvements furniehed to the County Engineer in the amount ae determined by the County Engineer and the State Highway Department. o that a11 roads within the plat be curbed and/or pbved to the specifiche1Oi8toshall be~ty Engineer. F~cisting County roac~s providing direct access to lots of t p paved and/or curbed to the standards ol the County Engineer. 13 2~ AvC ~'~'n iND1v~V v~C l_O ~ E 2~ hlo ~ rrt~c.~- ~cc.~ss To I O' 0, OD l-,t cor.~4 •~G 32 n'~ ~iEiJvF . -<<i9 ~o../ (01 W j~E . C,f S PE-1168-78 and ZE-13- 78 In the matter of a hearing to consider the application of MidiJ.bme, Inc. Spokane, Washington to file a plat to be knwon as Midilome First Addition on property described below. Also to - consider thanging the Zoning Map from Agricultural to Single Famtly Residential on the property described below, such zone change to become effective only upon the filing of a final plat or plats of such property. The property being platted fs described as the NE 1/4 of Section 33, Township 25 N., Range 44, E.W. M., Spokane County, Washington, except Midilome Addition, also except fihe r/w for 32nd Avenue also except the r/w for Bowdish Road. (South of 32nd Avenue approximately 800 feet east of Bowdish Road.) AFrIDAVIT OF POSTING STATE OF WASHINGTON ) ss COUNTY OF SPOKANE ) ,Ltco v 1 c , being first duly sworn on oath, deposes and says: That I am a citizen of the Untted States of Amerlca, and a resfdent of the State of Washtngton over the age of IQ years. That on the ~G day of 1/yia/~~ , 19 7 c, I personaily posted one (1) or more true and correct copies of the hereto attached and [ncorporated herein by reference N4TICE OF PUBLIC HEARING in a conspicuous manner at each of the following locattons, to-wtt: . ~ ~ t ~c-e•-~,~,~ n~ L, ~ . ' 2 ~ ~~"~.•-r2:~iv~. 1 l c'1 ~ ~ A-, :3 3 ~ DATED THIS DAY OF 19-7/ . SIGCE Subscribed and Sworn to before me this day of 19 ' 17 Notary Publfc in and for the State of Washtngton, resid!-ng at Spokane, Washingtoi ~ ~ ~ ~ ~ A~~NI~~4~ ~A~i~H 30, ~ELEPHQ~i~ NC~.; ~S~i-2274 ~PC~~SAN~ C(~[T1~TY ~'LANNIN~ ~C~MIv'IISS~~N ` ~'lme, ~ T}tu~'~day, M~rrt'i ~~i ~1~3~ A.~~. Flac~; Cc~unty Heal~~ l~e~~ment Aud~~c~rlumr Ro~m 140 ` W~st ~ I ~ 1 ~o1T~ge ~ I ~ Pft~~~I~33~RY S~16DI1JI~IC~~i AND ~[~I~E ~CLA~STF~CA~I~N~ Ct~1mINU~D IT~ . PE~11~8-78, ~~d~I~~n~ Flrst ~c~lltt~n ~E~ ~.3-7~, ,~~ric~ltural t~ Sinc~le F~m~ly R~s~d~~r~ia.l - ~~c~~c~n Tvwri~hlp 2S N.r ~ng~ 44, E,W.11~[, ~ Tha~ p~rtfan c~f ~h~ N~ ~/Q lying N~ly c~f the , f~~~~~r~ng d~scri~~d l~r~e: B~~in at th~ 1/4 ~~rner of s~~~ S~~ti4n 3~; ~~et~c~ S ~9° 47'~ ~lc~n,c~ th~ c~r~t~ri~r~~ of 3~nd Avenue, a d~stance af 82~ feet the NE - ~vrner of h~I~diX~rrn~e A~d~~tion; t~~r~c~ S Q° Q~6' ~0" E al~nq t~~ ~ l~n~ c~f s~~~ 1~~~~l~me Add~t~on, I~ d[sfianc~ af ~47~' f~~t; th~r~ce N 8~° ~7`W ~ dl~tance o~ 3~ t~~t; thence _ S~0 a~ 1~Q E a~dist~nc~ of 19~ f~~t; ~h~nc~ ~ 86°~5'2Q°E a dlstanc~ c~f 76.15 f~e~; ~~enc~ S~8° 5~'1~" E a~istara~~ of 1~7. ~1 feet; th~n~~ S 90° ~4"4~l°" E a dtst~r~c~ of 5+~,~1 f~~e~; th~~~~ S~74~7' ~ a~~~t~nc~ ~f 65+D fe~t; t~i~n~~ S S0°3f'Z7" d~stan~~ ~f ~7,91 f~~t ~a ~P~e beglnnir~y of a curu~ cvnc~v~ t~ ~h~ NE v~i~h ~ radl~s ~f ~ 131.82 f~~t ~nd a central a~gl~ 37° t~~~~e S~~y along t~~ arc, a _ d[stanc~ ~f ~'~8. ~4 f~~~ ~o th~ ~nd of cur~e; t~~~c~ N 894 ~4'~ a dista~~~ of 38~,1? f~~t t~ t~h~ ~ ll~e ~f said NE I/4,. ex~e~t the rt~~t ~f way f~r ~~n~~ Road. ~l~o ~~c~p~ the ~tght of ~ay f~r ~Zn~d aVe~ue, T b. ~Sp~ns~r: I~Idil~r~e, I~c. - W~st fi46 `~h1rd Avenu~ SFC3~Ct3C1~i ~"A 992~I c. En~~~~~r: ~iar~r~~~ E. S~mps~n ~ng~ r~~~~~ Irt~, _ l~~rth 9~ 9 Arg~r~ne Sp~kane, '4~A 9~~~fi - ~~te Si~~e: ~9.$ ~.cr~s ~ N~umb~r ~f ~nt s: ~ ~ g f. Za~d us~ pr~~~a~ed ~y ~pon~~r: ~fn~~~ Family Dwell~ngs - g. E~clsting ~~n~ng: Agrtcultura~, est~bl~sh~d ~prfl ~1, 1~~~ _ ~~ve~tls~~ Zon~ I~e~~asslfic~~tnn; ~ingle ~amily Res~c~entlal ~ l. 1~ater ~our~~: Mo~el ~ . ~chc~~a! L~istr~ct: ~~r~tral ~~~l~y Sch~oc~l Dlstrict ~Vi~thc~d of s~w~~~e ~tspo~ai: In~tw~du~l on-site disp~osa~ ~yst~m~ ~ l+ EnvLr~nrryenkal Impa~ct: l~ tapl~ of d~~cussl~n at this h~ac~tr~g m~y v~~r~ti~~r ar r~r~t thi~ ps~p~s~! wili h~v~ a~~gntficant adverse envtrc~nmental ~mp~ct. p~ I ~n ~ ~I~r~r~r r~~,~ on~ ~o~~,~wY~~ 4 ~ J~i~x~,iY~i~ 1"11~l~~'~ ~ 7f V 1LLL~1~V~~ LV~..; Q~~-~~i I~ ~~o~~r~ c~a~~~c P~r~rn~r~ ~c~~r~z~sa~~ _ TE~ne; '~hu~sd~y, NC~rch 1'~~~, ~:30 A.M. ~l~c~: ~ouc~ty H~alt~ I~ep~rtm~nt Aud~t~r~um, Rc~ar~ ~~#0 ~N~~~ ~ ~ 1 C~~l~g~ . ~~r~~~~r~~ ~~r~~r~~sl~rr ~r~~ zarr~ ~~c~ss~~t~c~~~n~ ~~-11~~-~8, ~Ildtlvm~ F~rst ~dt~tti~n ~3~78, ~~r~~ultur~l to S~~,ql~ F~mlly Resl~~~ti~~ ~IICII~TITY Iu~P~ ,,A~,j, ~ ~ a ~ a ` „r• A ~ r : ~►i ~e T ~ + [ ~ ~p • ' ► ~ r • I `Ak CLARENCE E. SIMPSON RICHARD L. SIMPSON CHARLES E. SIMPSON < l.larercce e. Sbn1-*)jon engineeri, Ac. CIVIL ENGINEERS AtVD LAND SURVEYORS Registercd in WQIIJUlgton at:d Idabo TELEPHONE 926_1322 OFFICE N. 909 ARGONNE RD., SPOKANE, WASH. 99206 February 2, 1978 PRELIlMINARY PLAT MIDIIaE 1 ST ADDITION LEGAL DESCRIPTION That portion of the NE ~ of Section 33, T. 25 N., R. 44 E.W.M. in Spokane County, Washington lying Northeasterly of the following described line: Begin at the N~ Corner of said Section 33; thence S 85F471E along the Center- line of 32nd Avenue, a distance of 820 feet to the NE corner of Midilome Addition; thence S CP 06"10"E along the East line of said Midilome Addition, a distance of 477 feet; thence N 8Sr47'W a dista.nce of 30 feet; thence S CP 06' 10"E a distance of 195 feet; thence S 86° 45' 20"E a distance of 76.15 ft; thence S 6& 50' 12"E a distance of 137. 51 feet; thence S 4CP24' 40"E a distance of 50.41 feet; thence S 47°47'E a distance of 650 feet; thence S 50,36'27"E a distance of 97.41 feet to the beginning of a curve concave to the Northeast with a radius of 1131. 82 feet a.nd a central angle of 37° 22'18"; thence Southeasterly along the are, a distance of 738.24 feet to the end of curve; thence N 89P 34'E a distance of 389.17 feet to the East line of said NE ~ Except the right of way for Pines Roa.d. Also Except the right of wa.y for 32nd Avenue. ~ ~ E . Charles E. Simpson Q/4Q •_i ~ ` ' ~ ~9967 - 0 04% L lo ` ,~~~l1r FebrUai'y 23, 1978 Alexan+der Smith; EPA ]'ohn Armqrafst; DOE Tom Justus: VSHS Ger►e Prather; Sp, Co. H . D. Anthony Andersan; ~aworth and Anderson, Inc. Bob Turnear, Spakane Coun.ty Engineer Ray Card# 208 Study Jers~y Neal, Prosecuting At#ocrYey Gentleme~d We I~ave before us a major hausin~ proposal as an extensivn o# an existing/under constructfo►n prvpvs$Z known ~s Midelome AdgliQn. In au.r~ ~~~orts ~o better direct the preparatton of m+~aningful a,nd adeauate environmental analysis t wi#h regard to disposal of wa.ste water, I request the presencs +vf yvu vn your representative at a meeting to dfscuss the details of trre issues at hand. I have sCheduled a meeting in ouur office at 1:30 on Monday, March_l~ , 1978. Please advise Bob Bethards,, 456-2274 as to your arrailabilfty. Sirtcerely yaurrs, Fred L. Dayharsh Flanning Director M/~ ~r C/c Sob Bethards , ....c FINDINGS - March 30, 1978 PRELIMINARY SUBDIVISION AND ZONE RECLASSIF'ICATIONa COIVTINUED ITEM P'E-1168-78 - Midilome First Addition: Midilome, Inc. ZE-13-78 - Agricultural to Single Famil,y Residential Staff Findings regarding PE-1168-78 - Midilome First Addition: I. As the Commission may recall, this item was continued to todays hearing fram the February 24, 1978 Planning Commission docket. -The applicant requested that . continuation so as to allow him additional ti.me to assess the plat proposal in regards to sewage disposal methods available and the possible recommendation by the Planning Staff for an environmental impact statement on this proposal. II. The applica.nt has agreed to the T'l.anning Staif's request for the need, for an environmental impact statement for this proposal a.nd one is currently being prepared. III. The Planning Staff recommends that this item be continued until such time as the final environmental impact statement is prepared. _ 5_ ~ f ^ 1 ~ ` • FINDINGS , PE-1168-78 - Midilome First Addition: Midilome, Ine. ZE- 13-78 - Agricultural to Single Famil.y Residential PRELIMINARY SIIBDNISION AND ZONE RECLASSIFICATION Staff findings regarding PE-1168-78, Midilome First Addition: The plat sponsor has notified the Planning Department that he wishes to continue this item to the March 1978 Planning Commission Agenda so as to a11ow the applicant additional time to assess the plat proposal in regards to sewage disposal methods available and the possible recommendation by the Planning Department Staff-for an Environcnental Impact Statement on this proposal. -18- ~ - ~ r 51)0KANE VALLEq FIRE DEPARTIAENT ~ ~ 4;&XZ&& &&&4 ve-;w 619 / EAST 10319 SPRAGUE AVE. • SPOKANE, WASHINGTON 99206 • TELEPHONE (509) 928-1700 February 21, 1978 Mr. Fred Dayharsh, Planning Director ~ Spokane County Planning Commission North 811 Jefferson Spokane, Washington 99201 Dear Mr. Dayharsh: The following Preliminary subdivisions and zone classification fo r upgrading has been reviewed for fire protection: PE-1080-77 ZE- 27-77 Barden- Mains and hydrants need to be installed in this area PE-1161-77 ZE- 203-77 Swanson c/o Greenwood Realty- Mains and hydrants need to be installed ip this area PE-1167-78 zE- 12-78 Sargent - MainS and h,ydrants need to be installed in th i s a rea PE-1169-78 ' ZE- 14- 78 Bye rs - Ma i ns an d hydrants need to be i ns ta l l ed i n this area _ a PE-1171-78 , ZE- 16-78 Bonucelli-Mains and hydrants need to be installed in this area. PE-1172-78 , ZE- 17-78 "C" Fritz Nelsen, Inc.- Mains and hydrants nepd to be installed in this area R EeE'l V E ~F`3 2 SPOKANE COUiiiY PLANNING DEPARTMENT ! ~PRE VE1vT FIRES SAVE LI VES ~ Page 2 PE-1173-78 ZE- 18-78 Phillips- Mains and hydrants need to be installed in this area PE-1174-78 ZE- 19-78 Wyatt- Mains and hydrants need to be installed in this area PE-1175-78 ZE- 20-78 Waggoner- Mains and hydrants need to be installed in this area PE-1176-78 ZE- 21-78 Van Hees- Mains and hydrants need to be installed in this area PE-1177-78 ZE- 22-78 Winner- Mains and hydrants need to be installed in this area PE-1168-78 ZE- 13-78 Mililome, Inc.- Mains and hydrants need to be installed in this area. / Al Cook Lt. of Inspectors AC:sn R E C E I V D ; t~ ~ ~ I~i u F SPOKANC COUidiY PLANNING DEPARTMENT nl~ ~ ti ZONE RECLASSIFICATION OR PRELIMINARY SUBDIVISION ACTION TAKEN APPROVE DENY - ; C ONTINUE LIENGTH OF CONTINUANCE REASONS 1. J 2. 3. 4. CONDTIONS Subject to the Conditions as contained in the Planning Staff's Findings, Dated , and subject to the additional conditions that 1. 2. 3. VOTE Motion by Seconded by , VOTE YES NO I . ~ , l3 ~ r♦ _ ~_1 E X H I B I T A PRELIMINARY PLAT APPLICATION FORM AREA AND DISTANCE ■ooooo0oooooO000oo000000000000000000000000000ooo[]DOOO0000oOOOOo Tota.l amount of land in this Subdivision: 4-9, Acres Proposed density of the Plat: V3 g f 4 9.$ Lots/Gross Acre '1'otal amount of adjoining land controlled by this owner o sponsor• Acres Proposed use of controlled ad joining land : % ~Ujez: QdZr ~ What is the driving distance in miles to the nearest fire station? Shopping facilities? JOO Municipal Boundary: Paved street or highway? ~ LAND USE •OOOOOOOOOOOOOOOOO00oooooooaoo00oDDDOOaooooo000ooo0oOOOOOOOOOOOOOOOOOo Indicate the pr.oposed land use of the plat: Single Family Dwellings Duplexes ( Indicate lots for duplexes: Multi-family dwelling units ( Indicate which lots: MoUile Homes ( Other ( Describe other uses: Describe any non-residential use proposed in the Plat: What is the present use of the property proposed to be platted? 4=ctrr,r. List type of uses: Cvltivated land: ¢ 9,B acres. Pasture:. acres. Timber: acres. Vacant: acres. Other: Acres I s keeping of animals desired? No Yes ( Type : IMPROVEMENTS ■ooooooooaaooooooooaooooaoooooooooaaoooooOooooo0000000000oooooaoooo Do you.plan to f'ile the P1at in its entirety as proposed, or will it be a mu7.ti-phase dev- el opm ent? -~..~.a . ~ To what level of improvement will streets be constr•ucted? Gravel Minimumo Curb ancI Gravel ( Curb and Paved . Describe any combinations of above: What is the time pe.riod expected for complete development of the Plat: 7- Street ::mprovements completed? rs . Substanti.al number of lots occupi de s _7- oeA ~ Is dedi,;ation of any land for public use contempleted? (Parks, schools, etc.) No. ( Yes ( Describe: Indicate the size of units proposed to be constructed: 12-gp Square feet Number of bedrooms 3 - Will buildings be built on the lots before they are sold: No Yes ( Will any special deed restrictions be included in tne sale of lots? No Yes ( If "yes", explain: UTILITIES ■oooooooaooooooaoDOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOaooooDooooooooaooK3oo Indicate the proposed method of sewage disposal: Septic tank Lagoon ( Treatment plant ( Other, or -combinations (Describe) Indicate the proposed source of water supply: Individual wells ( Public system Private community system ( Indicate method of extending service to the lots (Dwellings): Underground utility ease ents Overhead utility easements ( Utilities in streets No easements ( -Indicate the-distance from this proposal to the nearest existing water main: O ~ Indicate size of nearest main: Inches. . List utility companies or districts expected to provide service to this Plat: Electricity: (n~u^d PQL,~,E,=. Gas: V~. p_ Water: ~ A.c--A Phone: ~ N,W. L3 , ~ I ~ ~ - - - EX HTBIT A Page 2 PRELIMINARY PLA7.' APPLICATIOIV FORM (Canti-nued) ACxNOwLEDGMENTs ■0ooC30vQO0afloaa00000o0ooa000nao0aOaaaa000DoCIDQOOaDClo❑0aooaQOO0o0o PRoPOSED Pz.AT NAME: L~~0 )~,,A 1=- i S 7 T y the undersigned, have campleted the informat-ion requested, and the Prelirnin.ary Plat has heen prepared by me under rny supervision in accordance with the requirements o#" the Spok,ane County Planning Department a,nd the laws af the State of Washington. (SigIled) E d Date : ~/Z-/ 7 6 ` Q~ : ~ ,6,, ° . - - ~r' (Addre ss ) ~ 9 0 -9 'Ra el. cL Phone : ~ z C- - 13 2. 'L ~ ~ or r~ ~.67 jJ~'f],. ~ . ~r 9 -z- C) ~ 1r ' ~k~- ' ~ Azi' - s , please print ' I, / iL egfv~f the sponsor of this gropased subdivision, am the (awner builder agent { aption holder contract holder of the property praposed to be platted and nave completed the infornation requested of ine and do hereby testify that a.t is correct and accurate. _ - - _ { Signed Date : - . (Ac~dress ~ Phc~ne ; q ' . - - , - - - . , ~ zip., • - - - - - - ? N0TARY Date. Z-/ 1...~ 6 ~ v nroapy=-~~a~ specia1 Corrments: , ~ _ _ ■0aooaa0o0=oaao❑a~~ TEIS PART TO BE CONfPLETED BY PL4NNING DEP~RTMENT a~~~~~~~~~~~'~~~■ PLAIVNING DEPARTMIlVT INFORMATIO1V Date Submitted; Checked by: School District: Preliminary Plat Fee; } . Existing Zoning: Date established: b `7 . Zone Change Fi1e Na. 13 -7& Adverti sed Za~e Upgrading: ~ Number of Lvts : 21a ~ ~ Lacation. Section Township -R Rangeq4~ , r17 k- ~ . } ° Plat File IVo. : Pl~.t I~ame : ' . ~ . AGENDA, MARCFi 30, 1978- TELEPHONE NO.: 456-2274 SPOKANE COUNTY PLANNING COMMISSION Time: Thursday, March 30, 1978, 9:30 A.M. Place: Count.y Health Department Auditorium, Room 140 West 1101 College PRELIMINARY SUBDIVISIOIV AND ZON'E RECLASSIFICATION9 CONTINUED ITEM 3. PE-I168-78, Midilome First Acilition ZE- 13-78, Aqricultural to Sinqle Familv Residentfal a. Locatfon: Section 33, Townshfp 25 N o, Range 44, E.W. M. That portion of the NE 1/4 lying NEIy of the following described line: Begin at the N 1/4 comer of said Section 33; thence S 89° 47'E along the centerline of 32nd Avenue, a distance of 820 feet to the NE corner of Midilome Addition; thence S 00 06' IO" E along the E line of said Midflome Addition, a distance of 477 feet; thence N 890 47'W a distance of 30 feet; thence S 010 06' IO "E a distance of 195 feet; thence S 860 45'20"E a distance of 76.15 feet; thence S 680 SO' I2" E a distance of 137.51 feet; thence S 400 24' 40" E a df stance of 50.41 feet; thence S 470 47' E a distance of 650 feet; thence S 50° 36'27" E a distance of 97.41 feet to the beginning of a curve concave to the NE with a radius . of 1131.82 feet and a central angle of 370 22' I8 thence SEiy along the arc, a distance of 738.24 feet to the end of curve; thence N 890 34'E a distance of . 389.17 feet to the E line of said NE 1/4,o except the right of way for Pines Road. Also except the right of way for 32nd avenue o b. Sponsor: Midilome, Inc. West 606 Third Avenue Spokane, WA 99201 c. Engineer: Clarence E. Simpson Engineer, Inc. North 909 Argonne Spokane, WA 99206 d. Site Size: 49.8 acres e o Number of lots: 138 f. Land use proposed by sponsor: Single Family Dwellings 90 Existing Zoning: Agricultura:l,. established April 11, 1969 ho Advertised Zone Reclassffication: Single Family Resldential i. Water Source: Model j. School District: Central Valley School Dtstrict k, Method of sewage dtsposal: Individual on-site disposal systems - lo Envfronmental Impact: A topic of dfscussion at this hearing may'be whether or not this proposal will have a significant adverse environmental Impact,- (VICIIVIT'Y MAP ON FOLLOWING PAGE) 5 _ . ~ . . ~ , • ~ ~ AGENDA, -MARCH 30, 1978 TELEPHONE NO.:: 456- 22 74 SPOKANE COUNTY PLANNING COMMISSION Time: Thursday, March 30,. 1978, 9:30 A.M. Place: County Health Department Auditorium, Room 140 West 1101 College PRELIMINARY SUBDIVISION AND ZONE RECLASSIFICATION 3• PE-I168-78, Midiiome First Addttton ZE- 13-78. Aqricultural to Sinqle Family ResLdential ~ ('VICINITY MAP) .~,•R~ - • , _ _ - ~ _ e• ~ - -~ix - ~ ~ - $ + r' ..r • ~ g ; y `s st . ~ , ' J r: _ - ~ •r ~ . ~ ' A t : t ~ , -,~i' 1 s , d E. • . .a ~I • E ~ - • 3 s 000 , 1 . ~ • ~ ~ .t ~ ; ti~;, „ .r ~ ~ r[ ~ ~ 'f • t. ^ J~I T a ~ . • . . - ~ 1.,= a . ~ ~ • ' ' ` , • TN tAV~! 0 • ' ' ~ ` . t ` O ..w c~ m ~ - • • • Tl-I• ~ ; , . . , , a . . r`~ .3 . . . - . . i . ' ~ • ~ ~ • ` • ± , . , ~ ~Y - T_ ' ` { 1 • ~ t • ~ ' ' . . ` ~ • ' , . . ~ ~ : • - , , _ ; . - . . 1 -t ~ ~ Y. ~ ~ ~f~ _ _ . - ; ~ _w ~ 4 . • 1 ~ . - _ 5A ~ ~ , AGENDA, MARCH 30, 1978. TELEPHONE NO.: 456-2274 SPOKANE COUNTY PLANNING COMMISSION Time: Thtirsday, March 30, 1978, 9:30 A.M. Place: Count.y Health Department Auditorium, Room 140 West 1101 College PRELIMINARY SUBDIVISION AND ZONE RECLASSIFICATION., CONTINUED ITE14 3. PE- I16 8- 78, Mfdilome First Acdftion ZE- I3-78, Agricultural to Sfngle Family Residential a. Location: Section 33, Township 25 N o, Range 44, E.W. M.. That portlon of the NE 1/4 lying NEly of the followi.ng described line: Begin at the N I/4 comer of safd Section 33; thence S 890 47'E along the centerline of 32nd Avenue, a distance of 820 feet to the NE corner of Midilome Addition; thence S 00 06' 10" E along the E line of said Midilome Addition, a distance of 477 feet; thence N 890 47'W a distance of 30 feet; thence S 0006' 10 "E a distance of 195 feet; thence S 86045' 20 "E a distance of 76.15 feet; thence S 680 50' I2" E a distance of 137.51 feet; thence S 400 24' 40" E a distance of 50.41 feet; thence S 470 47' E a distance of 650 feet; thence S 500 36'27" E a distance of 97,41 feet to the beginning of a curve concave to the NE with a radius . of 1131.82 feet and a central angle of 371122' 18 thence SEly along the arc, a distance of 738.24 feet to the end of curve; thence N 890 34'E a dfstance of 389.17 feet to the E line of said NE 1/4,o except the right of way for Pines Roado Also except the right of way for 32nd avenue, , b. Sponsor: M idilome, Inc. West 606 Third Avenue Spokane, WA 99201 c. Eng ine er: C larence E. S imp son EngLneer, I nc . North 909 Argonne Spokane, WA 99206 d. Site Size: 49.8 acres e, Number of lots: 138 f. Land use proposed by sponsor: Single Family Dwellings g, Existing Zoning: Agricultural,. established April 11, 1969 h, Advertised Zone Reclassificatlon: Single Famlly Resfdenttal i. Water Source: Model J. School District: Central Valley uchool District ko Method of sewage disposal: Indivfdual on-stte disposal systems - lo Environmental Impact: A topic of discussion at this hearing may be whether or not this proposal will have a significant adverse environmental impact, (VICIIVITY MAP ON FOLLOWING PAGE) _ 5 _ 456"2274 TE~PxQNE No • . . e, SION 19?$ 30 A~ um• R°°m 140 9?$ II~ G CQ1~M IS a, M~ ch 3~ a~~Pnt p,uditor~. ~ NTY T~'`~Sa Health Dep e ~Kp►I~E G GQU ~til0l Collec w es .me= CA~'jaV, I laCe; ~E REG.~P,SSlF ISI~N-AND Z~ 1 I~A.~ S~g1~ , st P ~d~t~ i~ Res~.dent~., e F lr F a m,~- QR£ alorc'to Sin le j-116 8 1 3778 ri~ult-- . 3. zE- ~ x •~~y 3K ~ • ~ ~ . ~ s' _ t ~ ~ _ • w ~ j+ Y ~ ~ M1,. y ' Y _ ~ ~ ~ ~ 1r~ '~~1 , t" • r ~ , ~ ` i~ ' • , t f r - ~ ~ s . ~ ` a~ y y 1~ • • F . ~ ~ ~ . - ~ . . , ~ , d ~ . ~ • • . . ~ ~ .Q I_ ~ . .~+f' , Y. • . t ~ ~ . . t _ . 14 . ~ 1~ . f . _ , . T - . • a , ~ . _ . ~ q ~ , • . . . . . . k . ; • • tt . Q~ • , ' - • ~ , '~i " , • ' • ~ . . L ~ 5A ~ ' _ ~ SPOKANE COUNTY 0~.4 ra , • ~ > • - PLANNING DEPARTMENT N. 811 JEFFERSON SPOKANE, WA3HINGTON 99201js ~ ~.~o:. •a al ph an Gut~ i e R E C E IV E t ? A 99206 MAR 21 1Q7~3 SPOKANE COU~ITY ~1AR 2u PLAN N I NG D EPARTM ENT Sf.NOER ~ SPOKANE COUNTY PLANNING DEPARTMEN T~~Fp ~~.\c~j,y~ v°~° ~ .,•°°~.'i:° ~ o (J N. 811 JEFFERSON SEN ll ~ t'~~ • ~ DER l, • ~ 1 ` SPOKANE, WA3HINGTON 99201 ~ fq,, ~ , a ~ V / E] Y' y"~~~; r't, til f• . ~ ~4 tuch ii&4ai-Gr = ~avcd, nat for~rY~r~able ~;<< ~Wdressee unknown . R Herber, N' ~ nb E C EI v t e er~ , E E. 2590 owan Ave. Met,rm ke, G!A 99025 1 v ~ SPOKANE COUNTY ' PLANNING DEPARTNIENT OC~ • - ~ SPOKANE COUNTY PLAr1NING COMMISSION N 811 Jefferson Spokane, Washington 99201 April 4, 1978 Honorable Board of County Commissioners " Spokane County Court House Spokane, wA 99201 ~ Gentlemen: At the regular hearing of the Spokane County Plarining Commission on Thursday, March 30, 1978, at 8:30 A.M. to 12:30 P.M., reconvening at 2:00 P.M. to 5:'10 a.M. in the Health Building Auditoriurn Room 140. The enclosed action was taken and is recommended to the Board of County Commissioners. Members present: Mr. McCoury, Mr. Quigley, Mr. Thomas and Mr. Ken-nedy. Planning Staff present:Dayharsh,Bethards,Fer~en, Davis, Mosher, Flescher and Brumleve. Engineer's Office: Kennaly and Legat. Pi-osecutor's Ofiice: Emacio. Sincerely, SPOKANE COUNTY PLAIl'iVIIVG COi~24TSSION Ted McCoury, Chairman _ Fred T. Dayharsh, Director of Planning FLD/sb ' . 0#'ficial minutes and record of action taken by the S-ookane County Planning Commission at their reoular hearincr held on Thursday March 30, 1978. . . ~ 4 MINUTES OF THE SPOKANE COUNTY PLANNING COhM3SSI0N HEARING OF MARCH 301 1978. 14iEREAS, the Spokane County Planning Commission did hold a public m.eeting on March 30, 1978 to consider the testimony arid requests of several applicants, objectors and other interested parties concerning the below referenced subdivisions, - zone classification upgradings, extensions of .time, and other items of business and, «l3EREAS, at said hearing opportunity was af'Lorded those favoring and those opposing all items of business, and~ ~lImREAS, Mr. McCoury, Mr. Thomas, Mr. Qui;l.ey arid Mr. Kennedy were in atten- dance and constituted a quorum, :and, WEiEREAS, the Spokane County Plaraning Commission fully considered the testimony given the environmental review, and all other evidence presented, recommends to the Board of County Commissioners the following: A. Disc-ussion jtems. ' 1. Raaart on CQinmissir)n2.0' Ac.ti.Qa: a) Pleliminarv Plat AnnPaLl, Bob Bethards uf the staff presented a report to the Commission members regarding the number of preliminary plats which had been reviewed by the Planning Commission during the past year and the number of appeals which were heard by the 8oard of County - Commissioners. Of the total 121 preliminary plats reviewed, 37 -were appealed, About 70% received the same recommend'ation from the Board of County Commissioners. The Board only reversed ?ess restrictive action on five differEnt plats. . , b) Sh,Q,rt Plat OrdinancP Mr. Bethards reported that the Short Piat Ordznance became effective on M,3rch 13, 1978. The appeal prucedure in the Short Plat administration is heard before the Planning Commission and then forwarded to the Board of County Commissionecs. There ?^av-- also been some other minor changes in the adooteC ordina^ce. c) Road St,gpda L(L. Mr. Bethards said a copy of Road Standards which have been adopted by the Board of County Commissioners will be sent to the Planning Commission. It is planned that thes4 will be discussed at the April hearing, . _ 1 _ ~ ~ ---r~ . ~ • 2, col'IlMis,jioC, r)n~; e[n s: a) Pro_ ose3 Ani>ndni?nt SonLe, Cn«nty Zonina ncd~'Dancq, k4 Acid a VIL~ij Statistic._s C(-uLar as a Cbnditional Use in the $gricLltLral_ Zonp- Tom D3vis of the staff inforrned t11e Commission that Mr, Paul . Rayburn wished to request that the use of a Vital Records Center be made a Conclitional Use in the Agricultural Zone, and that `he staff be directed to advertise for tliis amendment to the Spokane County Zoning Ordinance for consideration at the April 21st hearing, - In explaining the desire for this use further, Mr, Paul Rayburn, South 3518 Lincoln Drive, Spokane, commented that there is not a vital re;,ord center presently located_ in the Northwes t, The ' intended location is to be-one mile north of Deep Cceek at Sprague and Ritchie Roads. . Mr. Thomas moved, Mr. Quigley seconded, that the propo5ed amendment to the Spokane County Zoning Orciinance bc advertised for public hearing on the April agenda. Motion carried unanimously, b) Plattina Engineering .QS s , - Mr. Eugene Prather of the Spokane County Health District requested that the Commission be made aware and review the engineering. costs involved in platting. At the present time the only consideration be{ng given is at the initial costs and not the long-range cosrs which car involved. " c) Gitizen Parricipa ion TncL-1te RznorL . Gary Fergen of the staff presented a report on the current status of citizen participation. The "Operation Insight" flyer was updated in March and sent to rhe regular mailing 'list and also to the granges and to the County libraries, Mr. Fergen also cited a Iist of groups and organizations at which presenLations have been made by the staff znd those which are scheduled for the immediate future. 3. Five Mile PrQgress Re ort: Mr. Quigley, Commission member, asked whdt plan was voted on at the last meeting at Five Mile. W. Fergen replied that the citizens had voted on Plan "D" . The Five Mile Goals and Policies report is to be sent back to thle Planning Commission froni the Board of County Commissioners afrer they ha:•e recommended their changes. - 2 - _ ; Mr. Da.yharsh, Planning Director, asked the Commission for direction to ' proceed on consideration of the F ive Mile is sue , Mr. Quigley moved, Mr, Kennedy seconded, that the Planning staff be directed to prepare a final plan for Five Mile based upon the maps and the goals and policies pretty much as developed as per the Citizens Committee from Five Mile and as per the i=na' vote. Motion carried unanimously. 4. Hearinagi ExaminE:r C'n111t111 "P Ordinance. Mr. D-3yharsh said that the staff is in the process of drafting up the suggestiens f or the Hearings Examiner Committee Ordinance, and asked if the Planning Commission would like to have this for their consideration at the second cub'ic hearing in April. Mr. TYiomas moved, Mr. Quigley seconded, that the stafr ---e directed to complete the wording of the Hearings Examiner Committee Orc=n?rce and present ir to the members of the Commission on their agenda fo!- the April 28th public hearing. Motion c~irried unanimously. , 5. ('nmmittees of th . Sookane CQUnty Planning Commission: . , Mr. McCourl, Chairman, announced the following committees of the Commission: Work Proaram araci Lona-Range Pl~Annina: Kenneth Kennedy, Chairman Glenn Quigley , William Main oli .Y Comm' t _e: Eldon Thoma s Grace Rawlings . Abby Byrne • FPq1DXLdj Pjannjn C,opf,erence: Grace Rawlings, until her retirement, at which time • the representative will be Ted McCoury. L<<ai tTti P rom.mittee for Co`UrehensivP Pjan Und&a: At the present time this function will be considered by the Long-Range Planning Committee, until such time it should become too burdensome. 6, Heauest for Additional Aaenda Informakion: Mr. McCour l suggested that a picture of the plat be enclosed with an agenda page so that the Commission would be able to tell where dunlexes : single family residences and multiple units were to be located, -3- ccx ' ' _ . 7. PE-1087-77, SWAN ACRES REPLAT #1: SWAN, and ZE-47-77, AGRICULTURAL SUBURBAN TO SINGLE FAMILY RESIDENTIAL: That,an extension of time be granted to April 1, 19 79 .(Motion by Thomas, seconded by Quigley. Vote was unanimous) . 8. PE-1090-771 FOREST GREEN SUBDIVISI4N REPLAT I't1: WARD, and ZE-50-77, UNCLASSIFIED TO AGRICULTURAL SUBURBAN: That an extension of time be granted to April 1, 1979 .(M ction by QuiglEy, seconded by Thomas. Vote was unanimous). 9. PE- IL1 53-77, NORTHWOOD 2ND ADDITION: ANDERSON, and ZE-183-77, A,'-7RI- CULTURAL TO SINGLE FAMILY RESIDENTIAL: That the preliminary plat request be approved, and in so approving, adopts the Staff's Findings as the Planning Commission findings of fact as well as the conditions stated in the Staff's findings, dated Ularch 30, 1978 except that the following conditions shall be incorporated: That the wording on page 3, paragraph 5, of the Staff' s Findings, dat ed iVlarcn 30, 1978 read: That prior to the release of building permits for any lot within the plat proposal, all building materials and methods of construction shall be reviewed and approved by the County Buildinq Official $o as to mitigate any possible noise conflicts_ that may result from approval of this proposal within an area that may experience abnormally high aircraft noise and activity. Also, that the Sepa - Notice of Action, be included in those conditions.(vlotion by Quigley, seconded by Kennedy. Vote was unanimous). 10. PE-1155-77, NORTHtiVOOD 3rd ADDITION: GUNNING, and ZE-193-77, AGRICULTURAL TO SINGLE FAMILY R£SIDENTIAL: That the preliminary plat request be approved and in so approving, adopts the Staff's Findings as the Planning Commission findings of fact, as well as the conditions stated in the Staff's findings, dated 1Vlarch 30, 1978', except that the following conditions shall be incprporated: That the wording on page 3, paragraph S, of the Staff's Findings, dated March 30, 1978 read: That prior to the release of building permits for any lot within the plat proposal, all building materials and methods of construction shall be reviewed and.approved by the Countv Buildincr 4fficial, so as to mitigate any possible noise conflicts that may result from approval of this proposal within an area tLhat may expe:ien ce abnormally high aircraft noise and activity. Also, that the SEPA Notice of Actiorl be included in those conditions.(Motion by Kennedy, seconded by Thomas. Vote was unanimous). 11. PE-1168-78 , MIDILOME FIRST ADDITION: MIDILOtiIE, INC., and ZE-13-78, AGRICULTURAL TO SINGLE FAMILY RESIDENTIAL: This item is continued until such time as the environmental impact statement is prepared. (Motion by Thomas, seconded by Quigley. Vote was unanimous). 12. PE-1172 - 78 , vIICA PARK: C. FRITZ NELSO N, and ZE-17- 78 , AGRICU LTURAL TO SINGLE FAMILY RESIDENTIAL AND/OR TWO FAMILY RESIDEiVTIAL AND/OR MULTIPLE FAMILY SUBURBAN: That the preliminary plat request be approved, . -4- ~p~ ' • . PE-1172-78, MICA PARK (Contd) . - , and in so approving, adopts the Staff's Findings as the Planning Commission findings of fact, as well as the conditions stated in the Staff's findings, dated March 30, 1978 except that the following conditions shall be incorporated: That the plat sponsor work with the engineer's office and the Planning Staff to determine whether or not a redesign of the plat would be appropriate.(Motion by Thomas, seconded by Quigley. Vote was unanimous). 13. PE-1161-77, SUNSET MEADOWS SUBDIVISION: SWANSON C/O GREENWOOD REALTY, and ZE-203-771 AGRICULTURAL TO SINGLE FAIVIILY RESIDENTIAL: That this preliminary plat be denied without prejudice, applicant may resubmit plat with lower density. (Motion by Kennedy, seconded by Thomas. Vote was unanimous). 14. PE-1170-78, COLUMBIA PARK 1ST ADDITION: BONUCCELLI, and ZE-15-78, , AGRICULTURAL TO SI\TGLE FAVIILY RESIDENTIAL: As Mr. Quigley and Kennedy were not pre sent during the February 24, 1978 Planning Co mmission hearing, and did not hear this preliminary plat proposal, the Planning Commission co,uld not vote on this item. Therefore, no action was taken. 15. PE-1178-78, PONDRA PINES 1ST ADDITION: WOLFIAND; INC., and ZE-43-78, AGRICULTURAL TO AGRICULTURAL SUBURBAN aND/OR SINGLE FAMILY RESIDENTIAL: T Kat- this item be continued to the April 1978 hearing because of a prior • committment of fihe applicanfi. The Planning Department will pay all readvertising costs.(Motion by Thomas, seconded by Quigley. Vote was unanimous). 16. PE-1179-78, NORTHCREST ADDITION: WOLFLAND, INC., and 2E-44-78, AGRI- CULTURAL TO SI\TG-LE FAMILY RESIDENTIAL: That this item be continued until the Aprii 19-78 hearing.(Motion by Kennedy, seconded by Thomas. Vote was unanimous). • 17. PE-I180- 78 , ANCHOR SECURITIES No. 5, REPLAT '1: PIONEER HOIVIESINC., and ZE-45-78, AGRICULTURAL TO AGRICULTURAL SLTBURBAN: That this preliminary plat request be approved and in so approving, adopts the Staff's Findings as the Planning Commission findings of fact as well as the conditions stated in the Staff' s finding s,.dated March 30, 19 78 , except that the follow ing conditions s hall be incorporated: that on page 11C of the Staff's findings, the word"should" shouid be changed to "shall" , in the state ment about the plat dedication.(Motion by Thomas, seconded by Quigley. Vote was unanimous). 18. PE-1181-78, VERA VIEW ESTATES: MC MILLAN, and ZE-46-78, AGRICULTURAL TO AGRICULTURAL SUBURBAN AND/OR SINGLE FAMILY RESIDENTItaL: This this preliminary plat be denied without prejudice, applicant may resubmit plat with Iower density. (Motion by Thomas, seconded by Kennedy. Vot was unanimous). -5- ~ ~ 19. PE-1182 -78 , CASCADE HEIGHTS ADDITION: MC CLOSKEY, and ZE-47- 78 , SINGLE FAMILY RESIDENTIAL TO IUIULTIPLE FAMILY SUBURBAi~' That this item be continued until the April 1978 hearing. (Motion by Kennedy, seconded by Quigley. . Vote wa s unanimous). Planning Staff pres ent: Bethards, Dayharsh, Davis, Fergen, Mosher, Wesche, and Brumleve. Engineer's Office: Kennaly and Legat. Prosecutor's Office: Emacio DATED THIS 4TH DAY OF APRIL , 1978 BY: Stephanie Brumleve Recording Secretary FOR: Ted McCoury Planning Commission Chairman Fred L. Dayharsh Director of Planning _6_ ~ C~. ~ o~p~E CpGy~ , - y rr ` SPOKANE COUNTY HEALTH DISTRICT Inter-Offi ce Communi cation ~lN p\S Date: January 4, 1978 T0: Spokane County Planning Commission (~7 FROM : Dennis Kroll, R. S. le_~2~ QA I I I SUBJECT: Midilome First Addition - Preliminary Plat R-" E I v FD JAN 16 1978 1. References: SPOKANE COUNTY a. Map of subject scale 1" = 200' by Simpson dated DecU~hOkPiq Q4f$.RTM ENT b. Soil Survey, Spokane County, Washington, Soil Conservation Service, U.S.D.A., March 1968. c. Spokane County, Washington Engineering Interpretations, Soil Conserva- • tion Service, U.S.D.A., August 1974, Midilome Addition file. d. Discussion of soil types in Midilome versus adjoining area - by Dennis Kroll dated October 15, 1977. e. Midilome Addition file - field investigation report - preliminary plat - dated September 27, 1974, by Dennis Kroll. f. Midilome Addition file - existing well log data of private and public water sources. g. Change in plat conditions for Midilome Addition, April 7, 1977, by Spokane County Comnissioners. 2. Topography, soils, and water. a. Subject development was intended to be served by the community waste- water treatment and disposal facility now under construction for the Midilome Addition. At the time of the origiAal proposal, a plan was submitted which identified all future drainfield areas; consequently, it was determined that the relatively flat topography in combination with the Springdale gravellq sandy loam soils (S x B) would be suita- ble for all proposed drainfield system additions in an area adjacent to the present treatment facility. The effects of discharging treated wastewater effluent into the soil . layers above the groundwater aquifer zone have been previously dis- cussed during the original reviews of the Midilome Addition development. b. Model Irrigation District had indicated that subject development pro- posal is within its service area; however, the provision of water service to each lot is subject to the developer providing a well and reservoir site within the development area. c. It will be necessary for the developer to identify and locate any and all existing or proposed public and private wells inside of and withiA' 150' (feet) of the plat boundaries. A designated 150' (foot) radius ~ l~ SCHD-ADM-118 ` • ~ Midilome First Addition Page 2 January 4, 1978 no building zone controlled by Model Irrigation District shall be shown on the final plat for each proposed or existing public well. Unless abandoned to satisfaction of the Spokane County Health Dis- trict, a 100 foot radius "no building zone" shall be shown for the private wells. d. All plans and specifications for extending the wastewater collector system and any needed expansion of the wastewater treatment facilitq shall be reviewed and approved by Spokane County Engineers and De- partment of Social and Health Services. It will be essential that the aforementioned agencies acknowledge their plan approvals to Spokane County Health District prior to the signing of the f snal plat. R E C E I V E J A N 91978 SPOKANE COUNTY PLANNING DEPARTMENT l~ / AMENDMENT TO DEDICATION Midilome Addit2.on A public sewer system acceptable to county and state health authorities will be made available for this plat, and individual sewer service will be provided prior to occupancy. Lots 1 through 5 in Block 1, Lots 1 through 15 in Block 2 and Lot 1, Block 3 shall not be provided with se«er but shall have on site septic tanks for sewage disposal. ~ ED - ~ IL C C 1g~ ~ JAN 1 y NE ~0~~.~ ME~~ SQ p,NG p~p AR p~-p,NN ~l ~ CLARENCE E. SIMPSON RICHA4D L. SIMPSON CHARLES E. SIMPSOPI C,larerace C.. Simfidon engineeri, Ac. CIVIL ENGINEERS ACVD LAND SURVEYORS Registered in WaSbington a»d Idaho TELEPHONE 926-1322 OFFICE N. 909 ARCONNE RD., SPOKANE, WASH. 99206 December 13, 1977 PRELIlMINARY PLAT MIDIIAME 1 ST ADDITION LEGAL DESCRIPTION NE 1/4 Section 33, T. 25 N. , R. 44 E.W.M. Spokane County, Washington, Except Midilome Addition, Also Except R/W for 32 nd. Ave.,-Also Except R/W for Pines Road, Also Except Rf G+T for Bowidish Roa,d. •~S ES Isa,s~,,~fJ so ~J ~ 9967 - 9~~J F-~ . , Charles E. S imp on GISTE~~ Q iVAL ~ R.E C E I V E JAN 16 1978 SPOKANE COUNTY / PLANNING DEPARTMENT ~ _ A-: PREAPI6LE - March 15. 177 . ~ PURPOSE: To establish guidelines for home construction in MIDILOP1E' ADDITION. DEVELOPERS: Midilome', Inc., a Washington Corporation. President, Edgar Bueschke; Secretary, Robert H. Tomlinson LEGAL: Beginning at the North quarter corner of Section 33, Township 25 North, Range 44 East, W.M., in Spokane County, Washington; thence South 89 47'00" East along the North line of the Northeast quarter of Section 33, a distance of 820 feet; thence South 00 06'10" East a distance of 477.0 feet; thence North 89 47'00" West a distance of 30.0 feet; thence South 00 06'10" East a distance of 195.0 feet; thence North 89 47'00" West a distance of 260.0 feet; thence South 00 06'10" East 1,113.09 feet to a point on a curve with a radial bearing of North 06 35'43" West; thence along a curve to the right with a radius of 1,096.59 feet and a central angle of 6 48'43" an arc distance of 130.38 feet to the end of curve; thence South 00 13'00" West a distance of 60.0 feet; thence North 89 47'00" 41est a distance of 9.55 feet; thence South 00 06'10" East a distance of 135.0 feet; thence North 89 47'00" lJest a distance of 390.0 feet to the Westerly line of the Northeast quarter of Section 33; thenceNorth 00 06'10" West a distance of 1,987.84 feet to the North quarter corner of Section 33 which is the true point of beginning, EXCEPT the right of way of the County Roads along the North and West lines of said property. B: FULLY PROTECTED RESIDENTIAL AREA The residential area covenants in Part C in their entirety shall apply to Midilome' Addition. RESIDENTIAL AREA COVENANTS: C:1 LAND USE AND BUILDING TYPE No lot shall be used except for residential purposes. No building shall be erected, altered, placed, or permitted to remain on any lot other than one detached single- family dwelling not to exceed one and one-half stories in height and a private garage for not more than three cars. C:2 ARCHITECTURAL CONTROL No building sha71 be erected, placed, or altered on any lot until the construction plans and specifications and a plan showing the location of the structure have been approved by the Architectural Control Committee as to quality of workmanship and materials, harmony of external design with existing structures, and as to location with respect to topography and finish grade elevation. No fence or wall shall be erected, placed or altered on any lot nearer to any street than the minimum building setback lines unless similarly approved. Approval shall be as provided in part G. r e:3 DWELLING COST, QUALITY AND SIZE No dwelling shall be permitted on any lot at a cost of less than $29,000.00 based upon cost levels prevailing on the date these covenants are recorded, it being the intention and purpose of the covenants to assure that all dwellings shall be of a quality of workmanship and materials substantially the same or better than that which can be produced on the date these covenants are recorded at the minimum cost stated herein for the mimimum permi-tted dwelling size. The ground floor area of the main structure, exclusive of one-story open poarches and garages, shall be not less than 1,050 square feet for a one-story dwelling, nor less than 950 square feet for a dwell i ng of more than one story. C:4 BUILDING LOCATION (A) No building shall be located on any lot nearer to the front lot line or nearer to the side street line than the minimum building setback lines shown on the recorded plat. In any event no building shall be located on any lot nearer than 25 feet to the front line, or nearer than 25 feet to any side street line. (B) No building shall be located nearer than 25 feet to an interior lot line, except that a 5 foot side yard shall be required for a garage or other permitted accessory building. No dwelling shall be located on any interior lot nearer than 50 feet to the rear lot lines. (C) For the purposes of this covenant, eaves, steps, and open porches shall not be considered as a part of ct building, provided, however, that this shall not be construed to permit any portion of a building, on a lot to encroach upon another lot. C:5 EASEMENTS Easements for installation and maintenance of utilities and drainage fiacilities are reserved as shown on the recorded plat. Within these easements, no structure, planting or other material shall be placed or permitted to remain which may damage or interfere with the installation and maintenance of utilities. r The easement area of each lot and all improvements in it shall be maintained con- tinuously by the owner of the lot, except for those improvements for which a public authority or utility company is responsible. C: 6 NUISANCES No noxious or offensive activity shall be carried on upon any lot, nor shall anytK-Tng- be done thereon which may be or may become an annoyance or n;ance to the neighborhood. C:7 SIGNS No sign of any kind shall be displayed to the public view on any lot exceDt on profess- ional signs of not more than one squarefoot, one sign of not more than five square feet advertising the property for sale or rent, or signs used by a builder to advertise the property during the construction and sales period, C:8 LIVESTOCK AND POULTRY No animals, livestock, or poultry of any kind shall be raised, bred or kept on any lot, except that dogs, cats or other household pets may be kept provided that they are not kept, bred, or maintained for any commercial purposes. C:9 GARBAGE AND REFUSE DISPOSAL No lot shall be used or maintained as a dumping ground for rubbish. Trash, garbage or other waste shall not be kept in sanitary containers. All incinerators or other equipment for the storage or disposal of such material shall be kept in a clean and sanitary condition. G: ARCHITECTURAL CONTROL COMMITTEE G:1 MEMBERSHIP The Architectural Control Committee is composed of Edgar Bueschke, William R. Tomlinson and Robert H. Tomlinson. A majority of the committee may designate a rep- resentative to act for it. In the event of death or resignation of any member of the committee, the remaining members shall have full authority to designate a successor. Neither the members of the committee, nor its designated representative shall be en- titled to any compensation for services performed pursuant to this covenant. At any e7 ~ time, the then record owners of a majority of the lots shall have the power through a duly recorded written instrument to change the membership of the committee or to with draw from the corrmittee or restore to it any of its powers and duties. G:2 PROCEDURE The committee's approval or disapproval as required in these covenants shall be in writing. In the event the committee, or its designated representative, fails to approve or disapprove within 30 days after plans and soecifications have been submitted to it, or in any event, if no suit to enjoin the construction has been commenced prior to the completion thereof, approval will not be required and the related covenants shall be deemed to have been fully complied with. GENERAL PROVISIONS H:1 TERM These covenants are to run with the land and shall be binding on all parties and all persons claiming.under them for a period of thirty years from the date these covenanis are recorded, after which time said covenants shall be automatically exteoded for successive periods of 10 years unless an instrument signed by a majority of the then owners of the lots has been recorded, agreeing to change siad covenants in whole or in part. H : 2 ENFORCEMEPdT Enforcement shall be by proceedings at law or in equity against any person or persons violating or attempting to violate any covenant either to restrain violation or to recover damages. H:3 SEVERABILITY Invalidation of any one of these covenants by judgment or court order shall in no wise affect any of the other provisions which shall remain in full force and effect. J: ATTEST (Include the date and signatures of all parties. Include signatures of prior lien holders to evidence consent to subordination of existing lien to covenants. . K: These covenants shall not be construed as the right to violate any existing or future laws or county or city ordinances. L: No activities shall be allowed which could be construed as a commercial activity. M: No travel trailers, recreation vehicles, or mobile homes of a length greater than 25 feet shall be kept on any lot. THESE COVEhAiJTS SHALL RTOT APPLY A6 THEY RELATE TO SQUARE FOOTAGF AND HEIGHT REQUIREMENTS ON HOUSES STARTED PRIOR TO SEPTENiBER 15, 1 977 . WE(Jo EID ANE co~R ~E~~ SQ 0 NG DEQ A Q`ANN ~ E X H I B I T A PRELIMINARY PLAT APPLICATION FORM AREA AND DISTANCE ■ooDOOOOOOODOOOOOOOOOOOOODOOOODOOOOOOOOOOOOOOOOOODOOOOOO00ooDOo Total amount of land in this Subdivision: { 3 Z Acres Proposed density of the Plat: Z.7Lots/Gross Acre '.['otal amount of adjoining land controlled by this owner or sponsor: -Z-oo Acres Proposed use of controlled adjoining land: What is the driving distance in miles to the nearest fire station? 3 Shopping facilities? 1lZ jad,,_o Municipal Boundary: Paved street or highway? o LAND USE 00D00o0o00oDOO0oo000DOO00ooo0000ooOpODOOOOOOOOOOOOODOOOOOOO000o000OO0❑ Indicate the proposed land use of the plat: Single Family Dwellings Duplexes ( Indicate lots for duplexes: Nfulti-family dwelling units ( Indicate which lots: Mobile Homes ( Other ( Describe other uses: Descri.be any non-residential use proposed in the Plat :_j_a-r L4. sLzk, __C-, Ja L..-,F . What is the present use of the property proposed to be platted? -.r_7AAa4.A. List type of uses: Cvltivated' land: acres. Pasture: . acres. Timber: acres. Vacant: acres. Other: Acres I s keeping of animals desired? No (>Z Yes ( T~rpe: IMPROVEMENTS •ooooaaoooooooooaoooooaoooooaoooooaaooooaooaooooaaooooo0oooooaaooao Do you plan to file the Plat in its entirety as proposed, or will it be a multi-phase dev- elovment? To what level of improvement will streets be constructed? Gravel ( Minimumo Curb anci Gravel ( Curb and Paved ( x). Describe any combinations of above: 4Jhat is the time,pe.riod expected for complete development of the Plat: iN 7POA4sc~ evav_. ue~~- .~o Y~5 . Street :_mprovements completed? 4s DuA,-~ ,greeL*,cx6ubstantial number of lots occupied? -~~S , Is dedi,:ation of any land for public use contempleted? (Parks, schools, etc. ) No. Yes ( Describe: Indicate the size of units proposed to be constructed: • Square feet Number of bedrooms 3 . Will buildings be built on the lots before they are sold: No Yes ( Will any special deed restrictions be included in tne sa1 EoCs?E UV E D Yes ( If "yes", explain: ~ UTILITIE,S ■ooooo0000000oooooaooooo000oooooaaooo nDEPAR T~~oooooaooaoaaoo TLANNING Indicate the proposed method of sewage disposal: Septic tank ( Lagoon ( Treatment plant ()Z, Other, or -combinations (Describe) ~ Indicate the proposed source of water supply: Individual wells ( Public system (}C). Private community system ( Indicate method of extending service to the lots (Dwellings): Underground utility easements Overhead utility easements ( Utilities in streets No easements Indicate the -di,stance from this proposal to the nearest existing water main: Zn~ feet, Indicate size of nearest main: ( d Inches. List utility companies or districts expected to provide service to this Plat: Electricity: Gas: ~ Water: A,l~? twe-r- Phone: w-z) ~ • ~ ~ , EXHSBIT A Page 2 PRELIMINARY PLA7.' APPLTCATION FORX (Continued) ACKIVOWLEDGMENTS •ooooo00000000000000000000000000oooooaooooo00000000oooooaooooo000 PROPOSED PLAT NAME : Atsts,-n ez I, the undersigned, have completed the information requested, and the Preliminary Plat has been prepared by me under my supervision in accordance with the requirements of the Spokane Coun - ing Department and the laws of the State of Washington. (Signed) AO~ Date : 4 w • 92- ~ 1 3 ZZ (Address) N O 9 At'3 oti►r%e, phone. c~~;\_-:::. ~ S o l+~a~,,C c~a. s~►~ ~}o., zip. . 9 9z- ~ 'r9AL suRVEYoRts~,xskkL: please print I, tGli l6W-~~ the sponsor of this proposed subdivision, am the owner ( builder ( agent ( option holder contract holder ( of the property proposed to be platted and have completed the information requested of ine and do hereby testify that it is correct and accurate. . (Signed) . Date: /fr7/ Address / a~`"'~ ~Z . ~ ~ / Phone : ?bN"Avtort/. l.~• 6 D rp ~itdA vt • ~jr,.• • . . , . Zip: • NOTARY Date : NOTARY-SF,AL:`.. Special Comments: ■ooooDOOOOOOOaooooo■ THIS PART TO BE COMPLETED BY PLANNING DEPARTMIINT 80=C=000000000000■ PLANNING DEPARTNiENT INFORMATION jow` I G ► 9 '7 8 ~ Date Submitted:. ~ ' Checked by: , School District: C ;y-p&)L_ UA_Y Preliminary Plat Fee: . , Existing Zoning: RI c (i LTU Date established: Zone Change File No. : Z G" 1~0-~ g Advertised Zone Upgrading: Number of Lots: Location: Section Township)15 Range'-/4 Plat File No. : Plat Name : Wt D1 COM t: ' ~ 2S`T 1 T~ • . , v . or 4 ~ • ► Pnp EIv'VIRONMENTAL CHECKLIST Introduction: The State Environmental Policy Act of 1971 , Chapter 43.21C, RC*A requires all state and local governmental agenGies to consider environmen[al valuez both for their own actions and when licensing private proposals. The Act also requires that an F.nvironmenEal Impact Statement be prepared for all major actions signfficantly (and "adversely", as per WAC 197-1 0) affecting the quality of the environment. The purpose of this checklist is to help the aqencfes involved c'.etermine whe-ther or not a proposal is such a major action. Please answer the following questions as completely as you can with the information presently available to you. Please answer questians as "yes" or "maybe" if, in your opinion, even only slight impacts will result. The reviewers of the checklist will be aware of and concern themselves with the deQree of impact, asking you for more inf;.rr:~ 3- tion, if necessary. Where explanations of your answers are required, or where you believe an explanation would be helpful to government decision-makers, include your explanation in the space provided, or use additiondl paqes, if necessary. You shou11 include references to any reports or studies of which you are aware and which are relevant to the answzrs you provide. Complete answers to these quesEfons now will help all agencies involved with your proposal to undertake the requirPd nnvirnnmental review without unnecessary delay. The following questions apply to your total proposal, noC iust to the licer.se for whict: you are currenEiy applyfng or the proposal for which approval is sough t. You: answers should include the impacts whfch will be caused by your proposal when it is complete,:l, even though completion may not accur unttl sometime in the future. This will allov.f 111 of the agencies which will be involved to ccmo)ece their envirormantal rovi-v.~ nov: . without duplicatinq paperwork in the future. No application shall be processed until the checklist h,as been _-mpleEo~-i and retui-- { to the appropriate County department. State law requires explanations for every "yeS. " and "maybe" answer on the checklist. The person completina the form may be requfre(J to provide explanations for "no" answers, and in some caso_,, more detailad inforn;ation to aid in a threshold determination. NOTE; This is a standard focm being used by aIl s[ate ancl local agencies in the State of Washington for varlous types of proposals. Many of the question ot apply to your proposal. If a question does not apply, Just ~Ae tVo d continue on to the next question ~ . ~ JA~ 1 ~y NE ~°u ME~~ ENVIRONMENTAL CHECKLI3T FORM SP~KNG OEPNR r . BACKGROUND QLp,NN 1. Name of Propoi:ent: ?~~idilome~ Inc. 2, Address and Phone Number of Proponenc: ini T~i 1 7'+~ Vf'.11~.1(? ~ 1')n~<~I1f? 1T1~~"f" nTl 3. UatE Checklis[ Submitted: necember 1%► 1 19,11 ; 4. Agency Requiring Checklist: Spokane (22untyT Wa. S. NamP of Proposal, if Applicable: ~Si.dilome First Addi.tion ~ . id (IF SPACE f'UR EXPLANATION IS INADBQUATE, PLEASE ATTAC,Ii ADllITIONAL PAGES.) 6. Na[ure and Brief Description of the Propasal (including but no[ limited to its s1ze, ~ general design elemants, and other factors that will give an accurate under- standing of its scope and nature): riidilome Additions consist of 137 acres approximately, it contains 365 residential lots. These lots are layed out on a curvilinear street rlesir-,r., strFets are naveci, curbed, in additi.on tbere are st:rPPt lirhts for safet:y as ?tiell as aesthetic appeal. 7. Location of Proposal (describe the physical setting of the proposal, as well as the extent of the land area affected by any environmental impacts, including any other information needed to give an accurate understanding of the environmental setting of the proposal) : We are bounded on the north by 32nd Avenue, on the east by Pines Road, on the south 40th llvenue, on the west by Midilome Addition. Thia property is generally flat land, it was previously rather poor farm land. 8. Estim3ted Date for Completion of the Proposal: Three years for total completion. 9. List of all Permits, Licenses or Government Approvals Required for the Proposal (federal, state and local - including rezones): Preliminary approval of the Spokane Countv Plannina Com- mission; Final approval of the Spokane County Planning Commission; Approval hv thp Snokane County Itealth District 10e. Ib you,or the owner ln the event you do not own the subject land, have any plnns for future additions, expanslon, or fucther activity related to or con- nected wtth thls proposal? If yes, explain: No lOb, Do you own or have opttons on lana nedrby or adiacent to this proposal's locatlon? If yes, explain: No 11. Do you know of any plans by others lncluding the owner which may affect the property covered by your proposal or land adjacent or nearby? If yes, explaln: No 12. At[ach any other application forrr: [hat has bc:en completed rer,amiinr tiie pi-uposal; if none has been completed, but is expected to be filed at some future date, ci-scribe the nature of such application form: t.e uiii make apDlication to the Spokane Planning Commission for Preliminary plat approval. II. En`VIRONMENTAL IMPACTS (Ecplanations of all "yes" and "maybe" answecs are required) Yes Maybe No 1. Eartti. Will the proposal result iii: (a) Unstable ear[h conditions or in changes in geologic structures? . . . . . . . . . . . . . . . . . . X (b) Disruptions, displacements, compaction or overcovering of the soil? . . . . . . . . . . . . . . . . . . x - , -Z- ^ . , y ~ ~ . . ~ . (IF SFACE FOR EXPLANATION IS INADEQUATE, PLEASE ATTACH ADDITIONAI, pAGES.) Yes Maybe No (c) Change in topography or ground surface relief features ~ _ ~ (d) The destruction, covering or modification of any unique geologic or physical features? , , , , , , , , , , , X (e) Any increase in wind or water erosion of soils, either on or off [he site? x . . . . . . . . , . . . . . . _ (f) Changes in deposicion or erosion of beach sands, or changes in silta[ion, depositfon or erasion which may modlfy the channel of a river or stream or the bed of the ocean or any bay, inlet or lake? x Explanation: As a residential development the soil shall be disrupted, changed, etc., as it relates to road buildingg the digging of basements, landscapingg &tc., a cha-pge in the top- o,ranhy shall result as normally expected as houses rise and streets are paved and curbed and the deveopment is generaliy completed. Yj= Mayhe BD 2. Air. Wfll the proposal result in: (a) Air emissions or deterioration of ambient air quality?.X _ (b) The creation of objectionable odors? . . . , . . . , . X (c) Alteration of air movement, moisture or temperature, or any change in climate, either looally or regionally? X Explanation: There will be some air emissions created from furnace use in the homes t}aat are built as this area developa. 3. Water. Will the proposal result in: Yes Maybe No (a) Chanqe in currents, or the course or direction of wa ter movements, in either marine or fresh waters X (b) Changes in absorption rates, drainaqe patterns, or I the rate and amount of surface wa[er runoff (c) Alterations to the course or fiow of flood waters? X. (d) Change in the amount nf surface water in any water boay? . . . . . . . . . . . . . . . . . . . . x (e) D:schargs into surface waters, or in any alteration of surface water quality, including but not limfted to temperature, dissolved oxygen or turbidiry? x (f) Alteration of the direction or rate of flow of ground wa ters ? . . . . . . . . . . . . . . . . . . . _ x (q) Changs in the quantity of ground waters, either through ;iirect additions or withdrawals, or through interception , of an aquifer by cuts or excavations ? . . . . . . . , (h) D,~[erioration in ground water quality, either through direct injection, o►- through the aeepage of leachate, phoipates, detergents, waterborne virus or bacteria, or other substances into the qround waters? (i) Red,iction in the amount of water otherwise available for public water supplies ? . . . . . . . . . . . . . X _ Explanation: This pro jiact is to be served by a nr~;-l~~:ge sewage treatment facility, there wi11 be a drain field in addition to the treatment plank, effluent will be discharged into the Cround, whetlqer or not it reaches the grouad water is not currently l:nown. A well will be drilled s'tn this project into the aqr~ifer and will result in awithdrawal of water from t aquifer for the purpose of additional water capacity to th district water district which-is serving this development. ~ 3 'r a (IF SPACE FOR EXPLANATION IS INADDQUA?k PLEASE ATTACN ADDITIONAL PAGES,) Yes Ma}rbe No 4. Flora. Will the propasal result in: (a) Change in the diversity of specie s, or numbers of any species of flora (including trees, shrubs, grass, crops, microflora and aquatic plants) ? . , , , , . , , xx (b) Redu^tion of the numhers of any unique, rare or endangered species of flora? , , . . , . , , , , . , x (c) Introduction of new species of flora into an area, or in a barrier to the nornial replenishment of x existing species? . . . . . , . , . . . , , , . , _ (d) Reduction in acreage of any agricultural crop ? . . . . , x Explanation: T'here Kill be an introduction of new species of flora into the area as a result of the homes which will be built here will be landscaped and there are no flora at this time. This property was previously ueed for the purpose of €;rowing wheat as well as alfalfa. It was relatively poor farm land and the yefld have not been exceptional. Yes Mavbe Nu 5. Fauna. Will the proposal result in: (a) Changes in the diversity of species, or numbers of any species of fauna (birtis, land animals including reptiles, fish and shellfish, benthic organisms, insects or microfauna) ? . . . . . . . . . . . . . , x (b) Reduction of the numbers of any unique, rare, or endangered species of fauna ? . . . . , , , . . , , X (c) Introduction of new species of fauna into an are3, or result in a barrier to the migration or movement of fauna x (d) Deterioration of existing fish or wildlife habitat? Explana_ion: Yes Maybe N,o 6. Noise. Will the proposal increase existing noise levels? R _ Explanation: There may some increaaes in noise levels as they re- late to a residential usape. Yes Maybe No 7, Linct and Glare. Will the proposal prc;duce new light or c~lare? - Explanation: There will be new light as it relatee to resiciential usage both street lighta as well as lights in the homes and yard lights, etc.. Yes Maybe No 8. Land Use, Will the proposal result in the alteration of the present or planned land use of an area ? . . . . . . . . . . X. Explanation: • ~ - 0 1 . _ . ~ . (IF SPACE FOR IXPLANATION IS INADF;QUATE, PLEASE ATTACH ADDITIUNAL PAGES.) Yii Maybe ILo 9. Natural Resources. Will the proposal result in: (a) Increase in the rate of use of any natural resources X _ (b) Depletion of any nonrenewable natural resource? X , Explanation: Homes will be built on this propertp as a result heat will be used, electricity will be used to create the heat, the 13.ghts and so forth to this degree that there wi11 be an increase in the rate of the use of natural resources and also the possibilitp of some depleation of nonrenewable resouraes. ~ Yes MaXj~e NL-3 10, Rfsk of Unset. Does the praposal lnvolve a risk of an explosion or the release of hazardous substances (including, but not limited to, oil, pesticides, chemicals, or radiation) in the event of an accident or upset conditions? ~ Explana tton: Yes MaYbe No 11 ._Eopulation. Will the proposal alter the loca[ion, distribution, density, or growth rate oj the human population of an area? . . . . . . . . . . . . . . . . 3c - Explanation: As a residential development of some 100 plus homes we can expect an increase in the dQnsitv and distri tn of the population as it relates to that usage. 12. Housinq. Will the proposal affect existing hausing, or create a demand for additional izousinq ? . . . . . . . . . g Explanation: It will effect housing in that we will create some 300 plus new homes. Yes Maybe Nc 13. Ttansportation/Circulation. Will the proposal result in: (a) Generation of additional vehiculGr movernant? x ^ (b) Effects on existing parking faci2ities, or rtemand for new parking ? . . . . . . . . . . . . . . . . . X (c) Impact upon exis[ing transportatfon systems? . . . . . x (d) Alterations to present patterns of circulation or x movement o# people and/or goods? . . . . . . . . . - (e) Alterations to waterborne, rail oc air traffic? x ~ (f) Increase in traffic hazards to motor vehicles, X bicyclists ar pedestrians?. . . . . . . . . . . . . - ~planation: There will be additiaRal vehicular movement created as a result of home owners generally awning automobiles as a ,result also of home owners the transportat!ion systems will be affected. It map be that 365 new homes will create enough of a population impact that the pattern of circulation to some de,;ree could be chanpeci, ho«ever, it is doubtful. 7 ~ (IF SPACE FOR EXPLr1NATION IS INADEQUATE, PLEASE ATTACH ADDITIONAL PAGES.) Yes Maybe No 14. Public Services. Will the proposal have an effect upon, . or resul[ in a need for new or altered governmental services in any of the €ollowinq areas ? (a) Fire protection? . . . . . . , , . , , . , , , , x _ (b) Police protection? , , , , , , , . , , , , , , , x _ (c) S chool s ? . . . . . . . . . . . . . . . . . . . x - (d) Parks or other recreational facilities ? . . . . . . . . x _ (e) Maintenance of public facilities, including roads? -IL- _ (f) O ther governmental services ? . . . . . . , . . , . x _ Exolanation: T+ is diffi cLl t to gay~t what point fire protectiong police prntection, achool systems, parks and recreational facilities need to he enlarged as the population enlarges. To that degree the increase of 365 homes will increase or change or ~QfLa- nlv r;ncP th ar _ roads to these homes the need to maintain those roads will be increased. Yes Maybe No 15. Energy. Will the proposal result in: (a) Use of substantial amounts of fuel or energy? (b) Demand upon existing sources of energy, or require the development of new sources of energy? x _ Explanation• 365 homes use energyy for heat, lightsv etc. t whether or not this is substantial amount of energy depends on perspective certainly there is a demand Yor energy, that is tne eacisting energy and the amount of that demand is in question. Yes Maybe No 16. Utilities. Will the proposal result in a need for new systems, or al[erations to the followinq utilities: (a) Power or natural gas? . . . . . . . . . . . . . . x (b) Communication systems? . . . . . . . . . . . , . x (c) Water? X _ . . . . . . . . . . . . . . . . . . . (d) Sewer or septic tanks ? . . . . , . . . . . . . . X _ (e) Storm water drainage? . . . . . . . . . . . . . . X _ (f) Soli,d waste and disposal? . . , . , . . . . . . . X _ Explanation: As a residential development certianly all typee of utilities are needed in a residential development, thereforeg there will be a need for ttiese new systems. Yes Maybe No 17. Human Nealth. VWill the proposal result in the creation of any health hazacd or potential health t-3zard (excluding . . . mental health) ? . . . . . . . . . . . . . . . . X Explana[ion: -6- . . ~ ~ , ~ . A . , (IF °PACE F'Uk IXPL,INATION IS INADEQUA'I'E, P._LF,SE ATTACH ADDITIONiil. P^.GF"' .l Yes Maybe No 18. Aesthetics. Will the proposal result in ciie obs[ruction oi any scenic vista or view open to the public, or will the pro- oosal result in the creation of an aesthetically vffensive site open to public view? . . . , . . , . . , . , , , X Explanation: '_'es Mdybe No 19. E2ecreation. Wll] the proposal result in an impi-ict uporl tize qualiry or quantity of existing recreativnal opportunities ~ FxnLtnation: `ies Maybe No 20. Archeological/'riistorical, Vti,ll ti:e i;ropasa] result in .31teration of a siqnificant archeologici:l or historical site, structure, object or building? . . . . . . . . , . . . , , x Explanatian: III. SIGNATURE I, the underGigned, swear under the penalty of perjury that the Jbove responses are made truthfully and to the best of my knowledge. I also understand that, should there be any wtllful mtsrepresentation or wtllful lack o f full disclosure on my part, Spokane County may wlthdraw any drelaration of nonslgnificance that !t issue in reliance upon this checklist,. . Date: 1 ~ 1977 Propvnent: (Please Print Ur T yDE') Proponent: r7idilome , Inc. Address• w. 606 Third Aventie, Spokane, Wasliinr-ton 99204 Phone: $24-9131 Person completing form• Robert H. Tomlimsong SQcretary Phone: 624-9131 Date: Dapt. or Office of County Reviewinq C?iecklisc: Staff Member(s) Reviewing Checklist: 1171 t t - - < 7 , ~ ~ , ~ ~ ~ A~r~ ~ .r ~ 4 ~ 1 1 ~ ~ R - ~ ~a ~ ~ _v ~ ~ , ~r yr - . ~ 1 ~ t~, ~ ~ , - ~ ' 1 + , , ~ ~ ~ ~ , , ~ ; ~ ' ~ ~ , , ~ ~ , ~ ~ ~ ~ M , , ~ ~ ~ , . _ ~ ~ " ~ _ ~ , ~ _ ~ ~ ~ ~ M ~ ~ ~ a ~ , ° , ~ ~ ~ A & y ~p ~ ~ 1 F+~~ ~ ~~,~~g { ~ ° ' " b# ~ , ~ ~ P'f"' . ,r ~ ~ . r+i^ ~ ~ : + ~ } + ~ . ~ ~ ~r ~ ~ ~ ~~~r ~ ~ 1~ 11 - ` 4 { ~ ~ ~ ~ . " ~ t ~ t I ~ 4. ~ ~ .'i , l ~ ~ ~ ~ ~ ~ - a _ ~ , . ~ , ~ ` + ° ~ . V i , ~ i . N . . r "-r ~ ~ ~ ~ ► ' ~ e . ; ~ ~ ' y„ ~ ~ ~ ~ ~ ~ t , , ~ . ` . ' . ' ~ ' A - 4 , A ~ s "'sM ~ ~ • , ~ • . , ~ 'i 1 t ~ ` ~ . t~ . . . . ~t a . - ~ .t ~ ~ ~ ` s . . . . , ~ ~ ~ ~ , , 1;1 r, - - A ~ ` v ` v X . a ~ ~ . . i . . . ,~4, ~ . . . ~ . ~ r y, . ,y , . ' . ~.s y . . t; c , t ~ - , w 4 ~ ~ : ~ ` ' ~ ~n ~ . _ . °e. ~s . . .ms.~/ ~ ~ ' , ^ . ~ , ~ r~ t , + ` ~ ~ ? , , f ~ . . ~ . ~ d ` ' ~ ~ ' ~ ~ ' ~ ~ I ~ ~ • ~ ~ ~ ~ ~ ~ ~p . ~ ~ ~,1 r. ~ . ~ y '~1+L7 ~ ~ - y ~ 'd _ 1...b ` p~ ~ y~' t'..~ ~ T ~ ~ . ~ k' y. ~~`~4 ~ A ~ i T + L ~ . _ ~ , a ~ ~ k''~,~ . ~ . . ..'~e~ ~ ' +k . ~ . ~ + ^ . ~ ~ r - . ' ~ ~ .1 ~ ~ ~ L . ~ , .,kr ~ ~ j~ r k ~ d - ~ ,i ~ 4 a ~ ~ ~ ~ ~ 4 ` f . ~ ~ ~ . f ~ 1 ~ ~ _ ~ ~ f ~ ' ~ ~ ' k~ ~ ~ • ~ ~ , ~ . M , J. a ~ ~ - ' + P 5~ ~ 4. _ `t ~ s . r~ ~L. ~ .~c. ~ . .s. ~ r, , R~ + ~ " • ~ ~ . , . ~ _ v ~ *~b...s ~ .Y~ , ~ ~ ~ ~ ~ f ~ • 1.' ~ i' ~ .1 ry,.1 ~ . - n ~ ~u ~ ~ ' - . . ~ . ~ + ~a ~1 ~ 4 . r . 1~ p ~'4,. 1" ~ ~ ~ l a i } y xrn . ~ . - ~ r . • , ~ ~ ! . ` ~ " F, ~ ~ w ~ ~ ' P : ~ ~y" , ~ ~ ~ ; ~ ~ ~ ~ ~ ~ ~''1 ~ ' ~ . ~ . j ,y~? ~ ~ ~~R a i r ~ ~ , . , ~ ~ ~ , , F~ ~ ~ ■ ~ , ~ , ~ ~ t~ ~ ~ . ~ ~4 ~ ~ , ~y , ? - . . ~ . .s. s, . +t} ~A' ! ; ~ . T„ - e y` - ~ ■ ^ ~ ~'E' ,1 t+ ~ x~ ~ , t~ ~ 4 ~ , . . . ~ + r , . - e~ k r „ t . ' • ~n , . ~ ~ ~ , ~ ~ I . ; d- - ~ ~ , f - _ -r , , " . i . k A.) F ~ 1`~ ~f " A I~ ~ ~ . . ~ Z ° ~ ~ aw 6 ~ i~j+~ ' ~ . ~ ` , ~ ~ ~ ; ~ ~j * _ ~'F e~s ~ ~ ~ t~'# { , . ~ r d . . l ♦ ~j ~°.~1..~s, . . - . . ~ ' " ' ~ . s ~ ~ ~ ~ ~ " ~ M~' ~ ~ ~C~ s ~ ,4 + T ~g . ~ ~ . ,y ~ ~w` ` i ~ ~ ~ ~ _ , . ~ . , • 4 _ - _ , y,~ .~~~t 4 i. ~ . - - . . . , ~r ~ 1 s ~ ~ `+4y ~ + ~ ~ _ - ~IF` .r 1 _ ~ ~ a 6 ~ ~ ~ ~ ~ > - ~ y ~ , ~ . , ~ , a~ ~ ~ tif ~ ~ . ~ . , _ ~ ~ _ ~ ~ , „ ~ ` ~ Ki~ ( ^ 1 _ ~ ~ ~ ~ ~ ~ - ' _ ~ ts + . ~ ~ ~ I 1 - ~S` ~ ~ l~~. r ~ a+~ ~ F . ~y d ~ . ~ ~ ~ - ; q, ' ~ - • . ~ ~ ~ ~ ~ . . + , " ' ~ ~ ~ ~ ` i ~ ~ ~ t ~ti ~ # ~ . ` ~ wr,{ , . ~ r ~ ~ ~ , ' e.'~"' ~ ~ ~ - ~rv - - . ; ' ~ , `'-~7' ...o...~,,.•. - , " t',~ s - _ ~ ~ - ~ ~ µ ~ ~ U.S. ENVI~INMENTAL PROTECTION A GENCY ~ J a ~ ~ E O sr4r R E G I O N X V1200 SIXTH AV ENUE p SEATTLE, WASHING70N 98101 z " L o Q z z O r ~~r'~C PROSsG~` '+•R~"~'~. • REPIY TO ATfN OF: M/S 409 DEC 21- 1978 DEC ►b, u Mr. R. C. Brinck COUNIY COMtiIISSlOiVERS Service Officer Supervisor ECEIVED Dept. of Housing and Urban R ,Y•• Deve].opment JLif,~ ~ ~ i~r~ West 920 Riverside Avenue " Spokane, Washington 99201 ~ SPOKANE COUNTY ; Dear Mr. Brinck: PLANNlNG DEPARTINEfdT - ~ This is i.n ref erence to your November 24, 197$ letter regarding the ~ Midlome First Addition, SP #373. The Environmental Protection Agency ~can not give approval to this project until additional assurances are made that the Aquifer will not be contaminated. On December 11, 1978, ' Harold Scott, a member of my staff, rnet in Spokane with Messrs. Jim Frank, Robert Tomlinson (app]_a.cant), Justin Quackenbush, Joe Blumel, ; Charles Simpson and Edgar Rueschke to discuss the project. It was ; unfortunate that Bob Giesa was unable to attend. EPA's two concerns ; regarding the project, namely treatment o£ domestic waste and di.sposal ~of urban runof, f, were discussed at the meeting and are summarized below. The first concern is treatment of domestic wastes. At this time, 'r• ~ . fifty-one (51) homes are connected to the activated sludge treatrnent system with effluent being discharged to a drainfie].d. ~ae believe that L for this project the package treatment plant has the following advantages: f„-f 1. A collection system would be in place for easy connection to possible future sewers in the Va11ey. . 2. More control over the operation and maintenance such as removal , of solids to maintain a clear effluent, ability to alrernately rest part o£*the drainfield and capability for tesCing effluent quality. , . r 3. Ability to upgzade the plant xf finances and spaces are set ~ I aside. ~ Ilowever, while we support this concept for the package plant the recent 208 data and independent,analysis at the A.B.C. Laboratories, Inc. have i E~ . , I.i. . . ww.• . • . _ • . - " . ~_~~f_~. r. t i • , - _ ' . . ' 'I. . • . ' . ' • . ' . a• ' • • • " \ • • . • ' - • ' , . -1 . . ' . - ' , ,l - , , • Y . • ~ • ` _ • ' . ~ . ♦ ' ` f t \ 2 shown the nitrate level for a well in the general area (Tis. Sally Gerimonte) to be five (S) mg/1 as Nitrogen and occasionzlly greater than six (6) mg/1. The Federal. Drinking Water Standard (adopted by the . State) is 10 mg/1 as Nitrogen. Therefore, for EPA to make a decision on yw?c t the-acceptability of the project the following is needed: 1. Assurance that additional drainfieJ.ds will be designed to include from four (4) feet of native or compacted fill soil (loamy sand) or combination thereof with percolation rate of three (3) minutes per inch or slower betwTeen the bottom of the draintield trench and the highest annual ground-water 1eve1. The fill material sliould be graded with the gravel material to cover the drain lines, otherwi.se, a major •---difference in permeability at the gravel/fill interface could result in o c water perching on top of Che fill material with flow toward the sides . and spillage over the edge thereby, by-passing the fill materi.al. The percolation test is defa.ned in the 1967 U.S. Public Health Service Publication No. 526 Atanual of Septi.c Tank Practice. (pages 4-7 attached). 2. A monitoring program to identify the bacteri.ologzcal and chemical levels in the effluent from the treatment plarlt before and after it has ' percolated through the four (4) feet below the drainfield. The substances to be tested are those in the attached National Primary Drinking Water Regul.ations (nIPDt1R) (excePt for turbidity and radiochemicals) and those marked on the Priority Pollution List (PPL). jti'ells within one quarter p. (1/4) mile downgradient of any part of the project bo«nc3ary should be ~ monitored. Effluent levels after percolarion through the fill material ; at a minimum must meet the NIPDW'R. EPA requests for substances to be monitored from these wells would be based on the analyses of the effluent. The monitoring program should collect baseline data too. ` 3. Preparation of a Ground Water Xmpact Assessment (GIdIA) by a geohydrologist or soil scientist as to the ability of the soil system to protect the Aquifer. This assessment shoul.d be done in'two phases: a. . Based on conditions that presently exist, and b. based on the conditions that exist six (6) months after the project i.s completed. It shoul.d be mentioned that EPA is charged with protecting the entire Aquifer includ- ~ ' ing the uppermost part of the Aquifer and that the recent draft 208 4= • Spokane Water Quali.ty Study indicates contaminants generated on the land surface do enter the Aquifer especially the uppermost part. , i Please Note: EPA would be wi].l.ing to discuss the monitora_ng ~ program and ground-water assessment study in greater detail with ; the consultant. ! . ~ 4. l-lUD approval of funding must be contingent on the applicant ' commitment to upgrading the system at any ti.me betcaeen now and wi.Chin : one year of completion of the project if the GWIA as detErmined by k,PA review shows the Aquifer is being contaminated as a direct result of . ' r~.,~.. . . ~ ! . ~ - e - . . . . . _ • , . . , • . ' . • . . , • . , . - _ . .L. , . , . . • , • . . . _ . . , • ' - , , ~ . . . 3 the project. Al.so, sufficient set aside land as we11 as reserve for finances must be available to provide space and funding for addiCional . uniC operations in the event upgrading becomes necessary. . ? r~ . 5. Guarantee that the p].anC wi11 be operated and maintained by an `ioperator cer tif ied by the S ta te . . . The second concern we have is the contzol of urban runoff and the following measures have been discussed with the EIS consultant and the applicant's . engineering consultant. They represent the first steps in designing and , constructing runoff control and disposal systems which wi.ll provide _ adequate protection to the aquifer. We be]_ieve the following mitigating measures offer the best Practzcable approach at this ti.me and should be discussed with the developer and incorporated i.nto conditions in the • Department of Housing and Urban Development's approval of the preliminary plat for the development. - t 1. j,rhere feasible, individual resid-eutial lots shall be designed and landscaped in a fashion which maximizes the retention of runoff on . ~ the property in order to allow sur£ace soils and the root zone to treat ' any contaminants in the runoff. No water from resa.dentxal lots shall be ~ piped directly to streets or drywells. Ttie proportion of the residential lots in the development which could be landscaped in this £ashion and • y the proportion of the potential runoff frorn the development which could ~ ~ be handled in this way shvuld be estimated. , 2. The use of drywells tor the dxsposal of runoff shall be inini- mized. Where drywells are the only practical alternative, they shall be designed to include a layer of fine material in order to slow Che per- colation rate and enhance the treatrnent capability of the soa.l. Also, • ~ ; shal].ower dzywells spaced closer togeCher would result in greater dispers- ' al of runoff. The proporCion of runoff to be handled this way should be no ted . • 3. The preliminary runotf control plan should show where catch E basins with impervi.ous liners and spray irrigation on golf course and + ' park lands can be used for runoff disposal. Zt should, i£ possible, ' include a preliminary approval by the County Engineer of the "concept": and an agreement by an appropriate county agency to be responsible for the operation and maintenance of any spray irrigation system. It should ' ~ estimate the proportion of the runoff from development which could be handled in this fashion. ~ t' i The following adrlitional urban runoff mitigation measures should be evaluated, and implemented where possible: ~ ~ 1. Use of curbs on streets should be minimized in order to disperse ~ runoff over a larger area and Chus provide fot more treatment of the _ r.•' a. . F-• . : ~ ► . .1.. . ,1''• , a' ' ,L ` ' r,•• , . . . • 4 ^ , . t • ' . • ` . . . 4 runoff by the topsoil. Srreet sweeping or vacuuming with disposal in an approved land fill should be discussed. 2. Phase I of the GWIA should discuss the ability of the soils to treat any contaminants in the runof f and should include an analysis of the runoff. . I hope these concerns are expressed to the applicant as conditions for EPA approval. Also, we feel that recent public hearings regarding Midlome are sufficient to satisfy FPA concern for pvtbla.c comment and another hearing under "sole source" is not justified. If you need ; additional information please contact us. ~ . Sincerely, . . ~ William A. Mullen, hief . Drinking Water Programs Branch q. • - : ' Enclosures • cc: Jim Frank, Consul.tant to riidlome Ms. Sal.l.y Gerimonte ~ Ms. Joan Honican ~ Robert Turner, Spokane County Engineer . ~ Ed Pickett, Spokane Health Disrri.ct ~ Rhys Sterling, DOE ~ . ;iHarry Larned, Spokane County Board of r~ . J Commissioners Jose Urcia, Spokane Regional Planning Conf erence A-95 Cleara.nghouse ~ I 4 , . . ~ 1 I i . ~ ~ t.N ~ 1 . ~ _ _ • . , w: ~,''Y` 't i • A• ' '•l : ' • ; . Y ' . • • . . y ^ . 1 . . l, , " , " • . , ' - ' . . ' ' . . , r . , . (2) The maximum seasonal elevation of the ground water table sliould be at least 9•feet below the bottom of the trench or seepage pit. Rock formulations or otlier impervious. strata should be at a depth greater than 4•feet below the bottom of trencll or seepage pit. Unless these conclition9 can be satisfied, the site is unsuitable for a conventional subsurlace sewabe clisposal 5ystem, ;7 a PERCOlATION TESTS Subsurlace explorations are necessary to cletermine subsurface forma• ~ tions in a given are.1. An auger witli an extension handlc, as shown in Figiire 1(p, 5), is o(ten used [or making the investigation, ln some ; cases, an examination of roacl cuts, stream embankments, or building excavations will bivc useftiil in(ormation. Wells and well drillers' logs can also be usecl to obtain information on ground water anci subsurface conditions. In some ateas, subsoil strata vary widely in sliort distances, and borings must be macle at che site of clie system, lE the subsoil ap• . • peaR suitable, as juclged by other characteristics described in Appen• ' lix A, percolation tests sliould be made at points ancl elevations selected M as typical of the area in which the clisposal. field wil) be located. ~ The percolaeion tests help to cletermine the acceptab'rli-ry of the site ' ancl establish the clesign siie of the subsurface cli5posaY. sy5tem, The ' length of cime requirecl Eor percolation tests will vary in different types _ of soil. Tlle safest inet}iocl is to make tescs in holes wliic}1 have been , - kept filled with water for at least 4 hours, preterably overnight. This - is particularly desirable i[ the tests are to be made by an inexperienced " person, and in some soils it is necessary even if the inclividual has had . considerable experience (as in soils which swell upon Nvetting). Percola• ~ tion rates should be figured on tlie basis of the tesc clata obtained aEter the soil has had oPporwnicy to become wetted or saturated and has liad opportunity to swcll for at least 29 liours, Lnoubll tests should be madc in separate holes to assure that the results are valid. The percolation te5t cleveloped at the Robert A. Tzit Sanitary Engi- neering Ceneer incorporates these principles. Iu use is particularly recommended when knowledge of soil types and soil structure is lim- ~f~a o 1~ M ited. NUhen Previous exPerience and inEormation on soil characceriseics are available, some person5 preter otlier percolation test procedures, such as those developeci by Kikcr and by Ludwig which are ciced in Appcndix A. r,~~ , o r • Procedure for Percolatlon Tests Developed at Robert A. Taft Sanifary Engineering Cenfer 1. Numbcr and localion o/ ctsts.-Six or more tests shall be made in , separatc test holes spaced uniformly over che proposed absorption field , u Slle, • Flpun 1.-Auger ond exlinslon hondle for maklnp Int bor(nps, 2. Typc of tcst holc,-Dig or bore a hole, with horizontal dimensions of from 4 to 12 inclies and vertical sides to the depth of the proposed s absorption trencli. In order to save time, labor, and volume of water ~ rrqwrecl per test, che lioles can be bored with* a4 inch auger. (See Fig. 2, page 7.) ~ 3. Prepuralron oj ccsc liolc.-Carefully scratcll the bottom, and sides oI the holt with a knife blade or sliarp-pointecl instrument, in orcler . to remove any smearecl soil surlaces and to provide a natural soil inter- face into which water may percolate. N.emove all loose material from tlie 'hole. Add 2 inches of coarse sancl or fine gravel to protect the bottom from scouring ancl scdiment, 4. Sncuration and jwtflrng af llcc soiJ,-It is important to clistin• guisll between saturaeion ancl swelling. Saturation means t1~at tlle void , . . _ . , , , . i . ~ - •F-,;.... sp~ces beiween soil particles are full of water. This can be accomplislled in a shore periocl o[ time. Swellinb is causecl by intrusion o[ water into . , ~ the inclividual soil particle. This is a slow process, especially in clay- ' type soil, anci is the reason for reyuiring aprolongec! soaking periocl. 1n the conduct o[ the cest, carefullY fill the hole wieh clear wlter to WNfH ~I~~ _"tI:tC0 rMA INOUT10H • • ^ ~ ~ , a mini,num deptlt aI 11 inciies over the gravel, ln mosc soils, it is neces• , 1EST3 MA1K IINiS MftE A1 + W!f(11 MAtIINO ►fICOIAtbN sary eo refiU the hole hy su~~j~lyin6 a surplus reservoir of ~vater, poSSlbly otGUTAt 11Mf INIERVAIS Iffif MARI( UNlS Ntl( AT i IEOUlA111Mf IN111VA11 b), means of an automatic syphon, to keep water in the.hole for at least 4 liours and prefcrably overnibht. Determine the percolation rate 24 ~ MEASUAlNO S11CK'fN,1 h • ' , ~r r..M1A1ULLYq {11Q• hours a(ter water is first ac{decl to tlie liole. Tliis proceclure is to insure that the soil is bivc» amplc oPporLunity to swell and to approach the , ouwt t~;ii OUIO( UNf ~ ► ~VN ~6 condition ic will be in cliiring ti~e wettest scason oI the year. Thus, the .'ouIoi uN fATTE110A1D~ yrl~ 1 , r test witl give comparable reaul1s in the same soil, wliether macle in a ouIoI L~c p~oR olMU nxEO , _ _~I'+~7" 6AiifR 60AQ0 A(fl4(NC1 10W1 c4ry or in a wet season, In san(ly soils containing little or no clay, the , C ~ sNvelling procedure is not es5ential, and the test may be macle as de- .'~"~~'~"r'~ ; s'.~'.°,U► ,;~i , ~k KEu Musu~INc' ti~i:~Y~~~ ' ' i. r';,b~. ~,~J~,~'~. scribecl under item 5C, after ilze ,vater from one filling of the hole has j S,KK wi►HiH 6VIO j~,. comp?etely seeped away. oN ~~~.3,,~~ , ~a ~~1 I; E 1tN15 i~ ~ 5. Percolation•rate mcosurernent.--~~1'ith ti►e exception oE sand soils ~ 6Ai7E1 DOAlO CL ?'Y ~ •fi i~ ~ ' Y i r ' .'ti - ~ WHEN EACM . ~ , t, L R(AOtN6 iS percolation•rate mcasurements sliall be made on the day (ollowing the TAKEN ~:.;',,,~1 1~ k~~,r ~ . ~ : F ~ ' t'~ ~~?~p!~'~ z~~o_ procedure describecl t,nder item 4, above, ,.•~.►~~:d1yR~N d~f~ ~1.;►;,;,.,Y~~~':~,~, .1tiy!~ . _ ~ ►',~9.;,~'r~'~~2i t{//~•~' r'~"• 1 DuMft[t ~j. A. IE water rem;~ins in the test liole aEter the o~~erni ht swellin e• WATEASUQfACf : " • ~ g P ► • ~ . ~ ~ . ~ ~ r 'r,.- , riod, adjust the deptli to approximatelY G inches over the gravel, k'rom ~+~~►;~~il~ .t l:)%",~~'r .1~F, ~~y~i~ ~'~1~,~,' ~~~•~~1 r, ' a fixed refercnc in • if ,~;;,~,,;,<w>',;+ 't , 4: ~ • t~ ; ..'.~e p0 t, 111easUie th~ ~p~ ~,~j,;y +F':•~ !'',~.~;~!'~i `11` l~~';;~'' 't~1 ,,.~~~'f~1;~~'}~~ i~'r'1 +~~C'` 4•.r ~ 1, 1', ~ 1 r'~ ~ a 1; e clro in water level over a 30 min• i ~ kt ~t P ) e p e r c o l a t i o n r a t e. ~►~=?':t;~ r~ ur~~ or ;~.,,,~~i.~~; , u t e e r i o c 1. T h i s c l r o ~ i s u s e c l c o c a l c u l a t e t l i v'- ;C?,',-'~ l+t•, ; l-'~ u)►1 i ) ~ • 3" IATU OF B. lf no water reniains in the hole after the overnibht swelling pe• GRAy« '►,7 4~tik~y~~ ~vn NOiE: IEAVF EATiIR EQAID IN ItACE • ~~K 1I ' rYiod, add clear water to bring tlie clepth of water in the hole to approxi• eE cAIEfuL NaT To Movf n,';',.`,•'' k;5,, 1+,; •'~{r OUYfNO TfSI. , (j.,~~ J),J4„ maeely 6 inches over the gravef. From a fixecl re(erence point, measure i:j the drop in water level ac aprroximaeely 30 minute intervals for 4 l10Uf5, refilling G inclies over the gravel as necessary. The clrop that FiBun 4.-Mothods of making parcolot(on tests, occurs during the t'inal 30 minute periocl is used to calculate the perco• . . lation ratt. The clrops cluring prior perials provide information ior . possible modification of the proceclure to suit local circumstances, C. In sandy soils (or otlier soils in whicli the first 6 inclies oE water . seeps away in less than 30 minutes, after the overnight swclling period), the time interval between measurements shall be taken as 10 minutes and the test run (or one hour. The drop that occurs cluring the final L~~ • ' ~ ~ WATER LA6 hus $TAtInH 1IAlIP.f , ANALYSIS 91'3 STORgT H0i STATIf1N LOf,ATI(1Nt ' DATCi DA7CITlHLi • TL~Nt Z SOLif1St ' HLTAI.S (Uf./L) BART.INP,UTRhL RxTAACTIALP,S (UG/L) ACID P,xTRAC71ALE5 (UC/L) 01091 ANTINOHT 31205 ACf.NAp11711EHB ' 3462I 2,4,6-?RICIILQH017I19NOI, 01002 AR9eNIC ]9120 HP.NZI►1INE 34452 P -CIlLORO-I{ -CRESOI, 0 I01 2 DCRYLLIUII 3 4 351 1,2,4-7RiCilLORORENZENP, 34386 2-CIILORRPiICItOI, 0102) CAl1N1llN )9)00 lICXACIIL0R0AP,N7.P,NF 3E601 2,4-P 1CIIlOROPIITHQI. 01034 CIIRONJi1M 36396 IIP,XACUl,OROf.711ANP. 34606 2,4-p1tIF,TIITLPIIPNOL 0 104 2 CQPPER 34171 1% 15(2-CIII,0RRr.'({IYI,) ETRP,R 31,591 2-HITROPI1ENOl. 0 I051 LP,Ap 35581 2-CIII.011 014APIiT11ALF,N1 34646 4-f4 ITROPUCNOL 11900 MBRCURY 343 36 1,1-IIICIILOR01% EN7.EN9. 34616 2,4-piNITRo PIILNfII, . 0 I061 HICKCL 34966 1,7-f11C111,OR(18P,N7.P.NF, 34 bSl 4,6-IIINITR0-0-CRFSAL 01117 SEI,LHIUM 34511 1 ,4 -DiCIlLf1R0RF.r1ZF.tIF 39032 Pf,NTACIII.OROPNENOL O10)] 91LYER )GbJI 3 ,3-(11Cill.QR04EMZ1t11ME 34696 pIIENOL 0 I059 TiIAI.LtUN 34611 2,4-111NITNOFOI.UF,NF 01092 21NC 34626 2,6-1) 1NITAQTQLlfR,NP, • 343 4 6 1,2-DIP1IEN'fI.11TpRAZINP. 34376 PLIIOAANTIlENE SCCLI.ANE01.13 (UO/t,) ]464) 4-CII1,QROPIIFNYL PIICNTL P.THP,R Vtlt,^TII,P, ORf,ANiCS (UC/L) ' 34636 4-AR0fI0PIIF,1IYl, rneUrL F;TfIF.R 00120 CTAHIDL (MO/L) 34283 S1S(2-C)1LOA0ISOPROPTL)ETHEq 34110 ACROLi:IN 1I730 P11F,NOl.ICS (titiP) 3 4 2)A fl 1S (2-CIIl.OR0ET1(OxT} METIIANP, 36215 ACR?l.(1NITRiL9 37702 IIF.XACIIl,ARO(lUTA01LNP 34030 RFNZENF 34786 IiEXACHLOAACYCLOrENTAnIpNP, )2102 CARAON T►tRAC11LORI(1C 34408 1SQpll(1RONF, 34)01 CII(,ARO6F,N7.ENP, PESTICIO€S (UC/L) 74646 NAPIITIIALP.NP, 32103 ' 1,1-niciiLnaot'tiIAt+P 34447 N1TROflENZeNP, 34506 1,1,1-TP,ICIII,OApET'IIANe 3 9330 +Il.DR1N 3443R N-1it7xn5017)tNP.TNTLKtiiHG 3 4 h96 ],!-ntr,ntnaor.tnnne 13 9350 CiILORDANB 34418 ' H•NITROS011I-N-PROPTLhMINC 36511 1,1,2-TRICIILOROGTIIAHE 19360 DIELDRIN }44)3 N-tI1TROS011lPIIP,NYLANINf, 14516 l, 1, 2, 2-Tf,TRACIILOROFTIIANP, 39100 4,4 'f1DT 19100 1% IS(7 -ET11Y1.1lP.%Yl,) PN7IIALA?B 34311 CIILOROP.?IIANE 393 20 4,6'DDL 74292 N-M1UTTL hP,N7.tL 17IIT11h1,ATC 32106 CIILnROFORN - 393 10 4~4'Dnn 39110 nt-N-AUTrL PNTIIA LATE 3450I I,I-DiCiILOROETIIYLENt ) 4)6l AI.PIIA CND03ULtAN 34595 DI-N-t1CT1L P11T1UI.ATH J4546 1,2-TRAN$-DICIILOR(1ET11YLF,NI, 3 4 356 ALTA rND09ULFAN ' 34336 i11t.TIfYI, PIITNhI,ATE )6541 1 ,2-i11CIILOROPROPANF 3 4151 CHb09ULPAN 9UI,TA7C 34341 DIIIFT11Tl, P1(TIIALATE 31i561 l,3-bICHLORQP0.0PF,NF 39390 ENnRIN 34526 BF,NZO(A)ANTNR1lCeNt )h)]l ETIITLfif,NZP.NE 34 366 P.NnRiN Al,(1LIITDL 3424) ' BY.NZO(h)PYRP.NE 344I7 , MET►ITLENP C,IILORIDe 39410 IILPTACIfLOA 34230 B FN).0(A)TLUnRANTIIV,Nf, ]4h18 NF7iItL CltLORlnt "420 11LP7ACIIl,OR EPOXIDC 34 24 I AENZO(K)PI,UQRANTIIP,NP, ]441) nCTIIYL RROtIInF 3 3] ALPIIA RitC 34320 CIIa1'9ENP, )2104 RROIIOFDRH -)97)8 9LTA RIIC ]42n Q AC91IAPHTIIYl,9NP. ' ]2101 flRf1110nICIIL0R0NLTIlANF. 39340 CAMItA RIIC (LiNDANL) )4220 ANTIIRACP.HF. 34488 TRlf,li(,AAOPLIIORQIIP.TIIANL J4259 DELTA I1NC )452) REN7.0 (Clit) PP,R1'LQHF 34668 nICULOROD1PLItURt1?IETIIANE 37400 TOXAPIIP.NL )4)AI Fl,UI1RLNP, 32105 0IRR0lf0C111.0R01`lETIIANE )66T1 PC11 1016 3 4t, 61 PIIF,NANTIIRENE )6415 TETRACIILORdET11YI,P,t{P, 3 94fl8 . PCb 1121 34556 1,2,5,6-r) IAENZAN711RACF.Ne 34010 TOLIIFNE 3 9J44I PCR 1232 JbdOJ 1 NpQHfI(1, 2,3-CD)PYRENP. 391A0 TRICIILOROf.T11YLF,HP. 34196 PCA 124 2 , 741-69 PYReHP, 39115 vl►+YL r,nl,nRinC • 39500 PCA 124 8 Jhh)S TCDn 3826A ' RIS(CIII,OP,OtIF.TiITI,) F,TIIf0. 39504 PCE 1254 365I6 2-CIiI,QRQP,TIIT{, YtNYI. CTNER 79508 PCD 1260 ' ~ ~ . . . ~ ~s•~ ~ = f ~I i'~ y, . l. .1 States RCgiori 10 D►inking Water i Environmental Proteciion 1200 6th Ave. Proc;rams Branch ~ Agency Seattle, WA. 98101 (206) 442-1223 Drinking Water ^EM National Interim Primary Drinking Water Regulations Reprinted From The Federai Register Volume 40, No. 248, December 24, 1975 And Volume 41, No. 133, July 9, 1976 RULES AND REGULATIONS Subport A•-General usrr. r_xcej,t tlui`c rceultiiil: froni corro- Cn1i`tif411i ;i. .i~f~~r~c•cl fruii~ :;1oil of i)ii,iiig anci Plunnbinr, cnuscd by inua-SUrcmcnL5 on n dr;• R11111plc. Zat.: ApEtIfrHbl►ity. ~ J41.2 Defitilllons. w;atcr qualily, a•c cxr_lu(ic(i Ironi this (11) "Mnn-nilcic baiti i)clrLiclc ati(i li11n- 141.3 Cnvcragc dPfittltlOn. lo(f emttlcrs" mcniis nll rftdionuctldc:+ ~ 141 4 varlanm-, nnct exemptlons. (d) "Person" means nn fnciividu11, f:1»1Lting betl particie5 r►ncVor I)i)olons 141.5 SttlnS requlrements. CO1'►ornt1oU, comEmny, m;ociation, part- ljst~ccl in T1axi►ntun F'ci•rn1ssible Body 141.8 E(fectlve dnUe nership, Stnte, municllmlity, or Fedcral blu►'dcns nnd Maxiiuum Permiscible Con- Subpart E3-Ma:imum Contaminont Levels ugeticy. renGrltloci o( Rnc1ionuclldes Irt Air or 141.11 Maximuni cunt.ocninaut icvcls tor rc► "I'ublir n•itrr systcnn" i»cnns a Wnt,cr fnr Occupnliuinil J:\pusurc, IVT3S lnorganlc chemlcnls. St';;f em for the prc►vlsion tn tlle public Flandlook GJ, exccl>L thc dlut;litcr prod- 141.12 1.fnxlmum contaminaiiL lcrcls for of plpecl «:itr:r for htimin cor7sutilptian, ucts c,f tl»riunt-332, ur.ini!im-•335 nnd orgAntc chemlcats. i( ; ucli ".vSlem has tit lcnst 1lflcen scrvlcc urFinlwn--238. 141.19 Tiaxlmum cont-aminnnt levels tor c lp► "C:rosti t)cl~t ~~.i1'tic'IC ;Ie-f.lvit}''~ Lurbldll o» i ~~cli~~i~ or reC~~llrl~~ ~crv~s an a~~er- } :i (:c ~f :il. lc~~t t~r~►~1.~•-C'i~•c in~li~~ic3unls L}ic tolal r;uiic~:u•ti~•iL}~ cluc tu bet,a 191.14 Waxtmum mtcrobtotogicn1 conLnml- Imt't,lcle Citiissi(it) as iilCcrrcd Cronl nlcos- nniit Icvcls. d;til}• at lcnst GQ d,iys oul, of the ycar. 141.15 rinxin,iin► c~>nt~~~~~i~~un~ Ic~•t`Ir Stich tc,•m inr,lttcles (1 );ln}~ cOllcc6inil, t~rcl»ciiL~ on d~S• ~nin~►lc. fror rntlinni-226. rniiiuni-1211, nntl trcitmriit. St,or^gc;, ttt1C1 tiiSf rItJUiIOn fa- y]4 1.3 (:u%i•riiFc. gross alrlia par~iclc rnd7oac►i.•ii* y rilitic:; 1111der coiilrol of tlic opcnitor of This plrt shall ;ipply to carh riiblic 111.1fi Aljixiiiiiiiii cosulnisjin: sucli s~•tilcnl n►irl u~r.d t~rirn;iri1~~ iii con- ~`•ateI• s~•5tcm, unle:s the ~~i~hlic «~ntcr iil ilCCLl(111 t1'lt~l C11fl S~~St('(11, All(I (1) fillyr ~~~•In (irirti~~~c n~iil i~i~il~~n r:~~~i~►• tiyStulll 1T1CCLS illl Ol 1.l1C fOllOtiI'lllg COtI(i1- nrlkit' fnooii rnnri-iuiiiic r.~~li~in~~. co11eC11(111 Of ~)I'Ctt'CafIl1Cl1L SLL1Ctl(:C f;1C1J1- ? ties »c~t unclcr sucli conti•al aliictl are Li01`' clifies L1::Cd piimai•ilt• 1» coniiccLioti ~~•ith such Coitsists o~ll~~ of dist•ribulioi~ and Subpert c-Mcnito►ing ond Analytical sy~ste~n. A public ~t'1LC1' syStClll 1s citliFr ~`'t.~i~~~~ f,lcilitics ( ~lld (IOCS I10~ Ilil~'C RIIy Requirements a"COI11111i1IlILy wnter sy;;t.em" or a "IlUll- cOIlCCIIQll and trentment, flciltties) ; 141.21 bilcrobloloBtcnl contamtnant sRm- C0111iilllnil <b1 01)tzins all of iGs n•ater from, but . S' ~t'RI.Ct' sy tem." ~ pl1ug and nnalrtlcal requlzenicnts is not oti<<iicd or opei•ated U~•. a public ~~a- . i j ~ "COiumunll,y ~t'Elter s~~siet~~" ntC~itls , 1ai.22 Turbldltp sc~mpiU~g ena anf►~yticnl t~r s~•st~m to whicli suctl regulatioiis • requiremenc,g. aPublic waLcr system whlch scrves nt 1CZSt 1; Scrvlce Conncct.l~~ns iiscc3 t)y ~~e.u•- 141.23 Inorgnnic chei~nlcni flRmpling and (c) Doc`s nut scll W1t,Cl' LU any pCrSOtI; analytlcnl rcqulrcmentx. rounc) residc»Ls oc rci;iilarly scrvcs t►t :Ind 141.24 Orgnnlc chemlcnl sampling and Ieasl 25 yenr-round reslclei►t5. (d) Is no{, 1 C11'1'1C1' wh1C11 conveys 6n81ytlC91 requlrCmCnLS. (11) "NGII-COt11I71Ullll.ti' R'RtCC SJ'SteItl" paSsCI1gcCS 111 111tC1'StRLC CO11]I11C1'CC. 1•11.25 Annlydrnl Alctltotls for Iiiiilin. meaiLS a nublic n•ater system that is not ut'tivitr. a COtllttlURitt• w1tC1' S}'SLPttI. ~ 1~1 1. 1 ~'uri:i~~~•rc :in~l ~~rniplionA. 141.26 Nlonitnring Frcyuencr fur Iin- (j) "Sanitary survcy" mcails nn ott- ti'ariances or exciilpl.ions f►•om certai» dit►nclivil• in ~.~~lniiluuli[r ~1~ntcc S)~b- SFtC TCvJCtiq pf the P;RtCC SOU1'C8, fi1C111- pt'~~t'ISiOnS Of LhCSC i'CgL11~11.lQt1S ttlay bC ~~.,,,s, ~ ties, equipment, operltlon and niainte- grantcd pursuant lo SecLions 1415 Al1d 141.27 Atcernacive enAtytlcal techniques. »1nCC of a Publie wat.er systeiu for the 1•116 oi the rlct by the entity with pri- 141.28 Approved Iaboratorles. pu1'pOSP, of evaluatiitg tlie udequncy of mary enfoi•cemeut CCS{)bllSlblllty, Provi- 141.29 Afonltorlns oi consecutlvo publto suc:li source, facilitics, cryiilpincnG, op- cions undcr Part 143, n'nttoitnl liitcrim u•ecer syscenu. cratiou nnd mlinLenniice for Producing 1'ri,rrarv Iariiikilig lS'aler Requlati0tis Subpart D-Roporting. Puniic Nolification, and 111Cj CI1StI'1bill.lllg safc drlnking R'flt{'l'. L172]1ICI1lf1ttC2t1072-s11V})art E (Viil'I1ilCE'S) Record keeping (g) "Standard sZmple" mr.ans the and subpart P (k;xemplions)-apply 141.31 Reporttng requlrement~5. Aliquot Of fini5hed di•itiking «•atcr t}iat, is wtlere EPA has primary enfoi•cement 141.32 Publtc notlflcnLlnn ot variances, ex- examined for tiie pcesenee of co)ifurin resPoii;iUility. einptlons, niid non-complinncc ba Cf.Cri<t. . w~ttn resutactons. (h) "Statc" meaus l,he aEc»cy o[ ihe § 1~1.5 S~~~n~: rr~~iiir~•n~~•~~tti. 141.33 Record mntntennnca SL1tC 6overnnic;nt which ha:; iurisdic- }3efore a UCrsou may etiler into a R- AvrtfoRCTV: Secs. 1412, 1414, 1445, nnit 1450 tiotl over put)lic NvalCt' systCnnS. Uur;ng nancial commitmeiit for or IIl1tIf1tC C011- of the Publlc Health ServICE ACL, 88 StnL. 1GG0 AT1V ))e1'IUd wE1CR ;1 SLilte C(OCS I10t tlav8 StI'UCtl0l1 Of 0. IICw pUblIC «•ater sy5fe171 (42 U.S.C. 300g-1, 300g-3, SOOJ-4, ni►c! 300)-9), primai-y, Cnforcement 1'CSpOILiIt)11lty or incrCase Lhe capacity o[ aii existing , Subpart A---General pLlrsuant tA Sectioi; 1413 of the Act, the public water syslem, tic shall notify the . §141.1 Ap~~~ic,bi lily, term "State" nienns the Regional Ad- Stat;e and to the ext~iit pr~tcticable This part estnblishcs primlr5° driiiking I»ii~istrator, U.S. Envirojunciltal Protec- ' ~ water rcbulaLions pursuailt to scctioil Lt011 AgC11Cy. RVOICI lOC:1L111g j71ft OI' E1lI of the new or 1412 of Lhe Public Heallh Service Act, ns "5umilier of watec•" r»eans nny expnnded fzcility at a site «•h1ch: ameiided by the Scife llrinking Wat.er rerson who o«'ns or oPCrates a publie (a) Is subject to a slgnificant risk Act (Pub. L. 93-523) ; ancl relaLed'regula- Nvater system. , (j) "Do~~: eciuivzlc«t" ineai~s the prod- Irom eart.hqunkes, iloods, fires or ottiei• tions aPplicabls to ptibllc water systems. uct of the nh disastei~s ~vtllCtl COUIC~ C1lL5C EL hCea}:C~O~VI1 ccirl~cl da;c frorn tonirlnt; § 111.2 llef lliefc►llA. rn,)1i►tion ~~iI~i s,ur~~ factc~rs sis a~•~•cnu►t for of I,he pti As used in this p:~rt, t,lic tcrm: blie watec system or a portion ~•c~~ccs in blulc~~;ic~l c~r.cLiv~i~c~s di,c (a) "Act" I11C111S thc Yuhlic Hc11t,h di;<< tlicrcof; or to thc ty~~c of r1c3i:,.tlon nncl it,s di.,t.rlbu- Service Act, us ftmende~i by Lhe Safe tlun in the ~c,~1y :►s spc~•ificd by thr_ Iu- (u) Lxcept for intake structures, is Drinking ~'Iatcr Act, Pub. L. 93-523. tern:~ti~,ria! C~~rnniistilon on F2~diolooical t~'ItIlltl Lhc iloodpl~iiii of a 100-ycar flood (b) "ContaminanL" ' means any pliysi- Untt~ti n,ii(l ntca.burcment;; iICIZU). or is lo«~er Wlnti an5~ recorded high tide cul, chemical, biological, or radiological substance oi• mattcr iu waLer. (k) "~I~.e~n" rnelns l.tie unlt of ciase «~herC ~►1~propriate records exlst. , (c) "Maximum contlininant level" cqti1cllent froln Iu►ii..ing 1'1(j1itI,1C121 to the The U.S. Envll'OIlIllCilt:1l Protectioil . means t,lic mlxirnum perinissible lcvel of toLal txxiy or 1ny int,crnll org,in or or- AfienGy will iiot scck f,o ovcrrlde land use a cont,arninant in w1Ler wliich is (ie- F;iLII sytitei». A"millirem 11I11'CI11)" LS decisions affecting publlc wat,cr systems livei•ed to t,he fi•ce flo+%infi c,utlct of l.llc 1/1000 of a rcin. siti»g a•lifch are madc at thc SLate or lo- ultiinate user of a put,llc wat,er systcrn, (1) "i'icQCUr1c (I)CI) " rlieans f,t►.1t ryual1- cal govei-nment Ievels. except in the case of t,urbidity where the U'Y of radloacLl~~e material proc~ucing 1,~ 1.6 l-ffccli~-c datr. niaximum j~Cl'I111S:;ible le~°el is tnr_;~surcd 2 ~2 nucletu t,ransfuru~.ations per nUn- § at the paint of entry to the disLributioii ute. The regulations set fortii in this Uart system. Cbntaminants adclcd to t(ie water (rr►) "Gros9 alphn Particle aCtJvity" shall take ef[ect 18 moiiths after the date • undcr circunlstances co»trolled by the inetins the total rnci,ioa.cttvity, due to of pranulgation. ' , . RULES AtJD REGULATIONS Subpart B-Maximum Contaminant Levels Ilyl%' «'ater sysleni.s and I1p11-CUI11111UIlILY nnre with pnraer.iptis (it), (b) (1), or § 14 1 .l l ,lluxiMun11 c~nt,~n~inr~nt Ic~•c1, WatCr svslcnns usiii(; :urf:tcc Wllet (u) 12t of Lhix %crl,ion sh:ill 1,e b:~ewcl upou for inorgnnic clierniculs. SO111'CCS in %%haic or {n pcu't. Thc rnsiei- samplinf; ciiirini, n 3 nuonlli period, rx- ininn contan►inacit lcvels far turl>>diLy crDt thnt. 1t, the discretion of lhe State, (a) The maximum cont,aminnnt level in drinlcin4; «•ntrr, i»c,istireci nt a rcpre- coinwlianrr l111}' bC 1);1Scd ii`»n snmpling ior nitratc is applicable to buth commu- scntal,ivc ->>try point(s) to Lhc disLribu- durinf; .1 o»c-moiith pcriud. nity waLei• systems aild non-communfty tio» ss•stc:.u, are: , water systems. Tlle levcls foi• tlie other (a) One tt~rUiciity iliiit (''U), a.s dc- 6 1•11.15 rln~~►»u~~~ ~~~„~:~~~~~n,~u~ I~~~rl+ fnorgnnic chemicals 1ppl}' Otlly tO CO111- tCl'It1lIlCCI Vy 1 I110I1thIN' al'CI'nI;C j1Ui'tiUfltlf. <<ir r:iolium-226. rndimu-2211, nnil -rw;,-q nllil►n pnrliiIr rniliosai•li. ilv in munity ~rater systems. Com~~liance •:-iLli to : 1•i1.3'~, exce~~f. that t'i~•e or fc«~cr • maxlmum contaminaiit levels for inor- tuc•bidiLy tiiiits ma5• uc allowcci if t}ic ganic chemicals is calculaCed pursuant to supplier of ivaG^r caii demo»strate to the '!'1ie fnllowing are lhe ni:INinMni (:011- § 141.23. St,itc tli;Lt thc hir;hcr turbidity clocs not t..tminauit lcvcls for rndnuii-:.'2G. rHLllun1- (b) The followi»g are tlle maximwtt do iiiy of the follotivi~ig: 228, ftnd gross a1p1~a parilrtc radio- contaminant let•els foi- inorga»ic chemi- ( II Inte►'frre with cltisinfe4tion; nct-ivll,y: cals ot,hei, thaii fluoi-ide: Yrevent m:►inlrnance u► on effer.- (fl) Cni~~~~inCd r.kdiiin►-:'•~t~ :111141 1•0cli- Lr.rct, titi•e clici»(ectant a6eiit throutihuut the oni-228--5 tCt,1. miuigraT,ts distribution sy:Arrzi: or ft>> C;rosc nlpha ~r,~rt~~•I~• ortivi1' v tlu- Coutnm,►lant pcr tircr (3) Intcrfrrc wil,}i Iniccobiolopic;ll clticlinK radluni-226 but VxrlM11119 r;tr11+11 ArsenlC 0.05 dctcrminal.io~ns. niict tirsiriiti►n~---l~i 11C'i '1 Barlum 1• (b) 2'it•c turl~iclit~• ti~~it:, Uicr.cl ~~ii aiI • Cndmt~im 0 010 ~ I11.1(~ Al,1~ii41ii111 ~•~~nl,~n~~n:i~~~ I~•~~•I. Chromlum 0.05 a~'ei':igC 101' Lti'7 COl1SCCllfll'C C~.IyS j)U1'Sll- (i~r lit•ln 1i,irti~•i~• nn~l F~Iint~~n iviiliu- Lend 0.05 111f, LO § 141.23. nrtk il) (ruiit r►►an-niuilc rmlimnu- Mercury 0.002 . . cliil~•s in i•r~~~i~i~iinili Hnlt•r •Irnik. Nltrate (as N) 10. ~ 111.1J ~1,~~in~un~ nii~~r~~l►iuli~~;ii:il c~~i- Selenluni 0.01 luniinanl IcN'4.1s. (;t) ''hC Rt•t't'age 11111ll:tl Cc;ttt•i•IItC.tl iol1 ~,hot~i~ ratllc~lcti~•it~. Silver 0.05 The ulaxinuum conlainlnanf, Ic~~~~ls for c~f bi-t:t ~~;irticlC 1nd from m•t►~-made rsidho:iirlides in drink- ' (c) N~Vheii the annual average of the ~oliforcn bact~ri:~, a1~i~licable to com- iiig ~•ater sh;►il nni. pcocl~,c e :~ii aiintuil .maximum dRily air teml~eratui•es ior the inlii~ity u•~ter s;:stems n~~d ~ion-com- rir►~:e c~~ui~•:~leilt tc~ the tutll )~od~• or nn\~ 7ocation in ~~•hich the Community ~~~atcr I11Ut11~5' P:1I.C1' S~'stems. arc as fo11o~~~S: 1~~t~,rnal o~.~,all ~ter fhan 4 i>>ill~rrni system is sltuated is the follo«-ing, the «l~en the I]lCtTl})1'AIiC filtcr tccl~- %.~,.i `'„~i, maximum contlmina»t levels for fluoride ni(Illc put~~,uanf to § ]4L21(a) is used. (1), J,~~.,~,~~t fur tl~~ i,iriiuiitu•liti~~~ li~lecl are: the nttmber r~. coliforen bacteria shall In Table A, Llic roncenti:at itin uf muii- not cxrcecl nny of lhr. followi»g: tiiidc raciioiiuclides causing a mrcin toLal c 1► Oiic per 100 i»illi]it.crs as tl~c Trin~~t~plu~~ (.cc~•l. t)UC{J' OC UI'gnIl CjnCC (`CjU11';I~CI1~: shuill be 1)i•¢i~~•~ I~~Fr~r~ ('~•I~iu~ tnilllcr:~~n~ arithmetic mean of atl S:ll71plC5 C\:1111111Cd h'uhicnh~•il l,orliti-i per filOlll,ll plll':;llAllt t0 § 141.21 (l.)) OT ~:t}C111~.1(~~ 0[1 f~1C 1J:1~~1• n~ fl litc•r per (C) ; Q1y drlnkltiR ,vzter iiitake usinr, c►ic lfia 5.3.7 oncl hrlnw•...... 17.n nncl hoi„N•...... < (2) Four licr 100 n7illiliters in II101'C hoi►r dfila ]isl,ccl in "Jlto.riinurrz F~e:rinis- 53.S1o5~.3.......... 12.1to11t~---------- t,}~;~n one sample n•hen ]ess tj1111 20 are ~ibfc 1?od~ 1.J►~rdcn,c nr~d ~llfll't)lll(171 Pcr- Ssa io639 11.7 l„ 171 utis;ib(r Cc»terrttralion nJ 7:rtt1lo»uclrdcs 6.31Ito70 C 17 ;tn zi_i.......... i.x eaaI111S1C(I pCl' I110111I1; or - 70.7 to i:1.:.......... 11 S ln =f.•'1.......... 1•G (3) Four per 100 milliliLcrs ili mo!•e in Air or tt'ritcr •7()r Urcupafto►lal F..r- 70.3 to ta.s......... : ^6.3 io z.......... I. i ~rc~;ru•c," NI3S H:ii~cll~oc~k 69 as ;~ntr,uclCd than fi~~c pcrcciit of t}ic s;~tn~~l~e ~~~tien 20 or more are exnmincd ncr month rtitigiist 1963, U.S. Dcparl,iticut of Coril- § 141.12 11Axinntm cotitnminnnt Icvcly (b) (1) Wtlen ihe fei-mentztion tube nlerce. If two or til(ire radiuc►ticllcles are far orgnnic cl►cniicals. niethod and 10 milliliter stinctlyd por_ I)resCnt, the sum o( t.heir nniiu~l dose The follo«~ing are the maxlmum coil- tians purst~ant to § 141.21 (a) :~rc ~~scd, E;qtlivalent to the tot.nl body or tn 1n~• taminant levels for organic chemicals. coliform bacteriz sh111 not be Uresent in organ shnll iiot exrecd 4 mllllren~- %~e1r. 'I'heY apply only to community water any of the fo]lowitlg: .1.~ -.I I•r019c it 7„rr,al C.,,,~•~•~~Iruri,w.Y systems. Compliance ~wlt}l maximum (1) ItIOtC L}lail 10 percent Of t.}1C pOl'- n.v.1M1?Ir il (r) pi'r)rllrrf 0 tnla( Iv.1111 iir orfll'i►s contamit1ant levelS j01' 01•gaiiic chemicals j,jqp5 1Cl any mOnth j)lll'S11111t t0 9 141.21 droQC ti/ 4 m!'Crn/yr is calculAted pursuanL to O 141.24. (b) or (c) ; - - - Leuct. (ii) thrcc or mot•c portions in moi•e icn•~i~~••noiic~o t'~~ii~ni „rs.,•- i.c'i . mtiiigrams th111 Qt]L 51111n1E' whel1 ICSS t}11T1 20 S1[ll- fM r Nwi pcr lttcr p1CS arC cxamined pcr tno»L2i; qr - Itl 7210CC vlnl bol~ , . pp(1 (a) ChlOrlnnted hpdrocnrUoiis: (lll) tllI'CC oi• inore {)OI"t10I1S EIroiiUUm •tKI . Ifoni- mnn-%- . b Endrln (1,2,3,4,10, io-tiexnc>>lora- 0,0002 than fivc percent of lhc samples wheu 8,7-epoxy-1,4, 4n,5,6,7.0,8n-octn- 20 or more 5lmples arc examined per hydro-1,4-endo. endo-6,8 - dt- Inon't-11. Subpart C-Monitoring and Analytical methano nnphthnlenc). ~ (2) WI1CIl t}1C fCl'tlll?t1tat1011 Lube Requirements Llndnnp (1,2,3,4,6,8-hexnchloro- 0.004 T11 cycloh~xnne, bn~»mn tsomcr). Cth0(~ :Ltld 100 111i1111iLet' &L;lt~d~ird nor- § 1•11•21 1licruliit)l4)~;i~•;~1 Cni1t::iui~tnnl AfCthOX}'Ch10C (l,l,l-T[ICh10~0- 0. 1 t1(1IlS j)1.11'CUQtIt t0 § 1'~1.ti1(F1) ;ll'C 11CC(~, F~ievil'~itig nntl ti~tnlytic•iil rctiitirc- ci,lifo►•m bacl.rri;l shall noL bc pi•cse:it, in 11)(111t•. 2, 2- bts in-n,cttioxyphenpll ally pf Lhc followinE;: (a) Siipplicrs of wntcr for comnittntty ett,nne). ci) moi•e thatl 60 perce»t o[ ihc pur•- tit•aler s5-stems and :ion-coiiim«nity w,ttee Toxnphene (C,ox,,,Cltl-Techalcal 0.005 tions in any mo»th pu1:5uliit to § 141.21 systems shall i1I1aiN"LC for coliform bac- chlorlnRted camphene, 87-89 (U) Qr (c) ; t.eria for i.lie uurpose of determining pcrrent ctilorlne). (ij) fIVC })pl't10115 1C1 more t11111 OriC COtlll]li:111CC «'ILll 6 141 14. A11;11ySCS 51111( (b) Chlorophcuoxys: sample wlien :ess thnn fire s:~mples ~►rc Ue coiIcittcted in aCCOPCI111CC «'1Ltl t11c 111- 2,~i - D, (2,4-Dichlorophenox}nce- 0. 1 exln~iiied per month; or alytical YeCJmniCnclatiOns set forth in LIC nCld). " SOI1d1CC1 AICt110Cls fOC CIIC EX:illll111t10i1 2,4,5-TP Suvex (2,4,5-Trlchloro- 0.01 (iii) fii•c portions in morc than 20 of Water nnd <<lastcu•atcr," American phcuoxypropiontc acia). percent of t}ie saiilples wheii five or more piiUlic Health Associlt.ion. 13t1i Edition, § 1,11.13 11nxi,ikulu rontanliiiaut lcrele S11t1plr_S are exnmined per monL11. pi). 662-6E38, except that a standard sam- fur turbiclily. (c) For rommunity or non-cotntnunity ple si7e shall be employed. Tiie st.1ndai•d Tlle mzximum contaminant levels for systems t.hzt are rcquircd to samplc at a Sample used in the membrane filtcr pro- turbidiLy are applicable to Uoth cnmmu- rate of ]ess than 4 per month, compli- ceciure siiall be 100 inilliliters. -2- RULE'; AND REGULATIOi Tliesl.incl- 97o.nni tit i.nswnuo 3u0 graph; (ci) (1), (21.or i3) of lhisscction 1rd s:ttnnlC tised ►n thr_ 5 tubc ma::t I•n;M•nni 'a 1. 1 111,0 lrl---------------- 310 shnll tint hc cllmiiiatr_•l frn►n tiiLurc sam- I.11r).IN)1 CO nrobable nunibcr (~iP,7) rroCCdurC ffcr- l.~~ti,nut tc. 1.320.[ ~►n_..------------ ~ pling ~~•itl~out r~i~~~r~~:~l c,f tt~~ S~ntc.'I'hc cnlif~,rni ac•tcrf;il ni1ni>~- , '~:;0 i•esull~5 [rom nll I~ rnentltion Lllt)C IT1CL110CI) shall l~c 5 l.i►ties t..~..noc>> (a 1 ,4 20.0011 11-io l.•t:0,00i i() i.5•1u0nn--------------- 350 5cs pcrformcd pursumnt, to lhls r.uhpart, thc slandl►•d portion. Tlic sLaticlni'ci por- 1.520,001 to 1.6311.000 Cxccpt Lliose o1,talncd iru►ii chc:ck sani- tiun is ei(licr 10 niillilitrrs or 100 millf- 16:10,001 to i.73o.cmn--------------- .jiu ples aiid epeclnl purjio:c samnles, sh111 be ]itersasdescriberi in § 141.14 ib) and (c) . 1.730.00 1 U, I 8.5111?oU--------------- ;jGll use(i to cietertn4ne compiflnce u•ith t.he The samples sliall bc takcn it nainLs 1.1150.001 Lu 1.9r0,000 390 mnxlmum conUaminant Icvel for colifor►n w}iich are rcpi'csentltivc of thc condi- 1 .970.00 1 s.-, 2.060,0u00 a00 bnctcrln n; csLnbllshcd Iti ~ 141.11 Check ~~.2°O.~qO - - - - - - 9tQ tions n~il.liin the (.iiyti ibutio►i Sy'5f.C'Ill. 2.0~,Oi►~i 1 to 2.'~7~~.0~~i V) z.~,io.n~!o--------------- 42 o s~mplc~s shall n~t be I►~ciuded in calculnt- lb) The sup~~lie~• of c~•ater for a com- z.~j in,i)ui co 2.:s~~.noo--------------- aau ~11~ the tat~l nun~ber of SAt11~~IC5 t~ken munits~ ~~•ater s~~stem st~all tlke colifor►n `•'jr''~•oni t" ;s n-o n„n 4.10 eneti nionth to cieLermine cc~ml~ll:~nce 3 (1.!f1,41)1 tn 3.320,000 41511 R'Ith § 141.21 (1)1 OC (C), density samples Zt re6ular time inter- 13,!0.00 1 in~.~.•~nn00 a60 (c) Whell t,he preyence of coliform vals, ;uid in number proportlonatc to tlic 3.(;z0,001 cr 3.1j(,O.nno--------------- -+70 ljac(rcia In wltcr t:►kcn fruin n partlculnr 3,9r,0,o0 i co a.'~in,c,nn--•------------ 480 sam ~ll►~ population served by Lhe systcm. In no h.-ii„j►c~t to a,G!~«^~~3 a;~o S E t~olc~t has bcen cn~lfir►ned by event shall the [r•equcncy be lcss ttlaii c~s a.69o~~0t ,z- n»r- soo ~h~~C~i Sttllln~C'S eX1111IllCCI !lS CIII'CC~E'(I set forth below: in paragraphs (ci) (1), (2), or (3) of th[s Blsecl o ii a history o( no cc,liform bnc- ~cctlon, thc suppllcr o( «:itrr chall rc- Afinimum iiumbcr oJ terinl conl,iiiiinnl.iun ;LlI<I oit n sailit-Mry port to t}ie Stzite «'It,hi» •18 hours. Populatlon scrved: sumplcs pcr monlli survcy by Ilic St:it,c shou•in;; Lhc walcr (f) NVhen fl maxlmurn contminant 25 to 1,000 1 SySt,eni to bc sut7pticci solcly by n pro- level set forth in paragraphs (a), (b) or 1,001 to 2,500______________________ l tected grciund watrr spurce Eind iree o[ (c) of § 191.14 IS excceiicd, the supuller . 2.501 to 3.300---------------------- 3 51t1it„lCy (Il'(CCi.S, 1 coinnIu►liLY Wat.cr SYS- of wnter sh1l1 rcliort, t4 the St.ite nnd 3.301 to 4,100______________________ 4 - tem .,crvinE; 35 to 1,000 nersous, <<:it,h nottfy the public ns nrescrlbed In § 141.31 4.101 to a,90o---------------------- 0 4.901 to 5.800 G wT•ittcn 1-eri»issinii from ttie Slate, inay a»d ~ 141.32. ' . 5.801 LO 6.700---------------------- 7 I'CIIUCC t115 S71111(]Illlg Il'CCILICriC}' CXCCpt (g) SneCiAl pUl'pOSC S:litlnll'S, SUC}1 FlS 6.701 to 7.soo---------------------- 8 tliut, in no rasc s1z111 it be reclNCec1 to less tliose taf:en to cleLecmine whi:ther dis- : 7,soi to e.soo---------------------- e ttiari oiic ticr qu:irtcr. in(cctlon practlces followinq plpc pIncc- 8.601 to 9,400______________________ 10 (c) 1"1ip :,upplier uf wotcr foi• 1iion- menl,, replacecTient, or repr.lr Iiave been 9,401 to 10,300---------------------- 1t conimu1iif,y ultcr:,ytitnm sha11:1mplc fr,r o.3oi to 1i,i0o sufIlclelit, shall not be used to c~etermine i 13 11,101 to 12,000 13 colifoi m baCtcri,i in cach calcndar cluar- CompllanCe w1G11 9 141.14 or 9 141.21 (b) 12,0c1 to 12,900 14 ter (tui•inr, wliicli tlie syste«i provides or (c), 12,901 to 13.700-------------------- 15 «'atcr t,c) t.iic~ Imbllc Surh samwling sli,ill (h) A suppUCr o[ wnter of A C0111- 13.701 to 14,a00-------------------- 16 bcgin within Lu•o yciu-s a[lrr the eI'fcctivc p, t, IlItS' %%'At,CI' S)'Sl.Ct11 or a non-com- 14,aot co 15,soo-------------------- 17 datc of Lhis pn1'L. If thc State, oii 1.11e I»tinity wnter systcrn may, with the 15,501 to 10,300____________________ 18 UaSLs of as1►iitary "~~~r , (iClCi•►1l'1iICS ~s,3oi to ~'r.2oo________ `~''5' fll~I~i'o~~fll oP ttle St.nte nrd bnsed ut~on A 19 I,hat Solne OLIMr fi•cciucnc~N' is 11101•e a1)1)ro- 17.2oi ta ie.1oo___________---- lo senitarS• stu•vey, Ftibsill.ute the 11se of 18,101 to 18,900____________________ zi 1»'i1ta, ttiat ircquency shall Ue the frc- chlorine resldunl monltoring for not moro 18,901 to is soo____________________ 22 (I«ency renuirecf u»cler these icUulations. than 75 percent"of the sAmples requlred 19.801 to 20,700____________________ 23 SuclI frequency shall be eoufirriieci or ;o be tnken by pnrngcuptl (b) of thls 20.70 t tc 21,500 24 changed on tlic basis of subsenucnt Section, Prouided, Thnt the SUpnIIE'T ot 21,501 t(i 22,300____________________ zs blirreys. %vntec• tnkes chlorlne reslducil samples ttt 22.201 to 2;.200-------------------- 26 (ti) (1 ) whezl the colifoi•m bacterla i» n potnts n•hlch nre i•epresentAtive of the 23201 Lv 24,000____________________ 27 .8 single slTnple exceed four per 100 mitli- condltions wi(hin. Lhe dlstribution svs- ~ 24,001 to 24.900 24,901 co 25,000 2t) liters c§ 141.14(a) nt lewst two ca>>secu- tem nt t,lie Irequency of at lenst :our for 25,001 tc 2e,000____________________ ao tive ciaily check samples sliall Ue collecCer.l each ,ubstituted mlcrobiologlcnl sample. 28.001 to 33.000-------------------- i s ncld ex,jininecl froin ttie sitmc satnlplinr, There shnll be ut 1e15t clnlly cietenninn- 33.001 to 37,000____________________ 40 pofrit. Additionul check samplcs shall be tlons of clilorlne resldual. mVtien ttie sup: 37.001 to 41,000 4 r, collected dailSr, or at ti irerIuency esl,nb- pller of wRter exerclses the optlon pro- 41.001 to 46.000 sO llslicd 1»' Ihc St.aLc, until Lhe results ob- i•1ded !n thls pttragrnph (h) of this aG ooi to so.ooo-------------------- 55 sect{on, he shall m~intaiii n~ less than 60,001 to 54.000 c;o t~;lned from at least two consecutive : 54.001 to 59.000-------------------- 6,5 clieck saniples show less thnn one coli- 02 mg/1 free chlocine throughout the , uub11C cvnter dLstribution 5>•stcnt. NVhen n 69,1101 to t3a.ooo-------------------- 70 foritt bttCtcrltun pcr 100 tnillilitcrs. 64.001 to 70.000 75 k2~ NV"licn co11lorm bacteria oCCUr in Anrtlcular sampling poiiit has IJCCiI 70.001 to 'r6.ooa-------------------- so tliree or morc 10.ml portions af 1 sfngle shown to have n iree chlorine residual 76.001 to 83.000-------------------- 85 ss,nple 1-11.14(b) (1) nt le.lst two 1ess tlln» 0.2 mg/1, tl►c wnl.er nl, thlt locl- 83.001 to 90,000 go coiisecutlve da11y cher.k samples shall be tiott sh111 be retested n.s soon ns pclc- 90.001 to 9G.A00--------------- 05 collecteci :ll1C~ CXRI11111CCI II'ORl t1~e snme tic:ible nnd in s~i~s• e~•e~nt ti~~itliin onc l~our. 96.001 to ttt.ooo------------------- 100 I"f thc ori6li~:~1 ctTi,~l~•sls 1~ ~ni~flr>>icc~, tl~is 111.001 ca 130,000__________________ sampling ~~oint. Adclltional check snm~~les ~~~ct sh11t be iel~orte~l to t,he SL:~te n'iliiin 130.001 cu iso,ooo__________________ 120 shall be coUected d,111y, or at 1 freRueticy ~II iiours. r\lso, !f the an:~lysis Ls con- 1r,o,oo1 to i9n,aoo------------------ iso establlshed by ttie St1te, until thc results 190.001 to 2zo.ooo------------------ 140 oUtnlued from nt least t,wa consecutivC 13i'iiiecl, n sainple for coliform bactecial 220,001 cu 25o.uuo------------------ iGO a~i11~•~is n~ust ~e collec;ted f~~um Ll~at check sni►iples shoNv no posit[~~e tiibes. 250.001 to z90.aoo------------------ 160 (3) When coitform bacteriz occur in ~11 5a111~~lii~g 11oint as soon ~.s p~•acticlble and 290,001 to a20.000 170 nvc o( the 100 ml portions of n sl»(Oe preferably itiftiin one liotir, nnci thc rc- 320,001 to 36o.oou------------------ loo Snml~le (5 14L14cb) (21 nt le~st t~~•o sti1fs of st~eli ;~~~al~~sis re~~orteci to tho 360.001 to 9inA0~~ ioo St1tc withln .18 hours zftcr thc results 410.001 to 450.000------------------ 200 da11y check samples stlall be collected nre kliown to the 450.001 to 5oo.uoo------------------ 210 and examined from the sa~ne sarn~~ling s~~l~t~ller of ~~~1tcr. 600.001 Lo ssu.oon------------------ 220 point. Additionfll check can~ples shall Ue ~~~n~~~`es for resicit~ll rhlorine sh;~ll be . 550.001 w5oo.ooo------------------ 230 , , inncie II1 a~:co►•da2~ce «~itli "Stand.~rd 2collected clnil%, or at a fre~tucnc.5 estab- Nt~tho~is for Llie Exai»i»ation of ~V1ter saouoi to s~o,ooo__________________ 40 llshed by the StaGc, uiitil the results ob- ' GGO.oot to 720,00~------------------ 250 and 1VastcwltCr." 131h Fd., pp. 129-133. 720.001 co 780.000------------------ Zpp talned from nt lenst, hvo consecutive Co►iZpliance \%'iLli tlie niaximunl con- 780,001 to s1o.ooo------------------ 270 Check samples shon• no positivr tu es. ts~ini»<<nt levcis for coliform bacteria 810.001 to 01o,ooo------------------ 280 'l'1ie locntfon nt wlitch t}lc clieck shall be cleteimiiied on,the monthly mean 910.001 to 970,000 200 samples n•cre taken pucsuftnt to para- oc qu-irtcrly »>cati ba.cis speCiticd in . $ 141.14, includlt7g t}jorze s,-iRijplCS f.akery ari:1lw-1,5 tJticMl! kX rQ110ntccl at iizl.N-4-VlS 13lli i:cliLion. E7l7. 210•-215, ar ""'icthncjs tS ft Yestalt of lRilure W d7i1inlain tlic i-c;- slmr,rrllinc(i i)ti, ti,c st, a iv. ro~- Cr,cl11i(-a1 r111,11~-Iis of Walcr 7nd qtlire€1 elil4riC'e rt"Licluai 1c'vel_ 'I'Iye Slaw rj)+ i[ ti~c r,F ~rj3 :ii7;:]}•~i; 111;1it[• Wa.'Aes." 37Es. 105m106, ]~:ry+.. iz•[) lI rti7c' I I 1a1 itiay u•jllict~aw its nppeo3'al of thc tlse of p~ar;•1i,1 r7f €,n Ini r,iQ E,:l I ,}j {;rI ir7[li~:;iles fir•I t F't•rjlccLion 11~,c~iti~•ti~, OIT«c o! TCr•]moiogy s13lo1'ii'7c i-esiduaD substitutlfln ;et allY Ihe Iek-ul ni am' c•«i7l:llmpl;ant 1hLcd iiti TI',,iilsfi:l', 1) :;OaCifl 1'J71, k,ime ; 1l1.11 oxceetl-i llic IllaK]lillDlll cn21L;im - i5M I.,e;1r1-At,qititiiC At#;.ni•lotiuil h1~,4L}3uci, EtI.lClt l+•vel. Ilte L.tippher of w,ttcr Qi,-111 "&-,rn[1'arrl AYclhocls f(3i- Lfic L\Elm3t3~l- ~~i,~i~•:i1 ri•~~~~ire•,~~~~„i~, relimrL Ii) lltc .~I,}#,c williii3 7 ctays alticl ticitz nI MItCI' ;1C7fi ~~':~~t~~~,~•~~e~,~ 13#h ~~l S~~t7~~~lesst~~llbe L,:~k~tf Si~~3~~1f~1•4 Ir1i4i;1U, lhrvC ~liIfIlLiC]Il:S] :411;llyves ,Sl• L}7e T:r3i#,ic+it. pli. :'10-215, nr• "Alciltntl~5 !ni• rrf waLer fCJ!' botll COfl1r]lklillL}' ivatCI' sX•5_ •`•-Mi"° {:w~"vliiip i,i,ili4 wi[1iiii ()t7c iiirst)[1i. C71lrriiic~si Anal}~tiis of W,Yter• .111(l W,s_,lcs," te~ns 3n[~ noz~-cc~mrnunrt~' ~t'~ter sysk.~ttiis r .ive i•a 6e of I~,~ar .►na3}'s~:s 1~1~. 112-113. En~'!i'o3}f11ct7k~~I I'rraler:lintl ~t ~t r~~~~~s~er~t~~~.iti~c entr3~ Ea~1E~krs} t~ tlt~ nj,jFl~• ~}~if5ld:lr]L f0 1).zr;ri~a oF Lfjis A~`C17C;', Ofiice crf 'I'cc}7t~nlv~:k• 'I`r:ii~sf~r, ser.ki~,n. r~rtiiiclrrl to ti~c ~aM~1C Iitlnil)ct of W ashi~IP-E011 O.C. 204C[}, 197-€, Water di8tribtati0l7 s;•steni : L 1NI5k. orICC '.11;l5ifir•.nk, firmrcs :t:, llie m,rxin7Liiri con- A ~~1 AI~~~`r~t~ ~•-~•`I;t~i1c.'lrw~ tm:1lC AU- per daY, for t}~e pllTpose n( 213a}[li![; I.t]l'- l.lli11t7,11A ]fl1'c] for #.7tc SufSSCatit1~:L' ]il +~ll'S- ~Oa'~7Lir11 ~~FC~pl[~il. ' I~IcI}~r,cl~ (na• C'i~[~~i7~c•;~1 bidity r~teasu~~eritet~ts to cfetal•niiile c:az7i- fi-5ri, L:~•:r•r~t~(ls L}in rz»xa~~tjiiy~ ~n~tif,7nrir%lz1G A~7a1Ybj5 of ;ttcr .►iid erp. 118- pliance wJtli § 141.13. Thc riieasuicnienG icvoi. I11F~ ~,~Ipp,lier of r )2~i, Te~v~~c~iitti~eili:~t Prtsieclioiti 11f,,~E7~';', sha,ll be mac~e by klic [~~cl)ticlo1uctl'ic r.,~~~~~1 ~7ol~~y 4}7o Stalsl pursu:inG La § 1•11 21 nlicl r2,%•c Otiice r~f '~'cr•kir3alo~*~TG~aaisirr, i~'as~i- h~'ethod iil accorc~piice ~ti•itli tt~e ~'eCOr7i- kirr, kn Lbifi 11tit~afc I)1]i`w~ta,riL to ~ l-il.3"~, i~r~;ton.~7.C. 20-7G~1, 1~7•~. n~cnd~tiat~s s~t fort~i i~Y "'StKi~7ci~j`d It'Fetl~- ~ r7) Niir•;otr,-Brwr,im: cnlaril➢icti•ic ads for the ExatnEnatian of VVatc]• ;tnd Wastewatel•," Anie3•ican Ptiblic HcalMi. f'L~ L a !1•c•reticiiCy clcs Eq-21,ttcr! hs), lfi c Sta #.c ~~tetitincJ, "Staml:kt•d Mcs}sock fur [1}c E:.- /Usodatlort. 13th Edit.j4n, pri. 350a353, oN' :ti~rl shatl coit#ii311c Lrnti! iYic ntaximtmz Of Wn3lCz• ❑"ici ~~r~xsl~:~'~tc~•,~. "ivIef.hod.s for Ctiemical Ana1ysis of contaniiri-trit ]ovcl has tiot bcOn crcUcdeC1 13tli r-ciitiOn. PI). 461-464, oi- C'ndmium Wak,er aiZd Waste5," lIl ~.~S-l~} Si1CCCssIi`C 5~1111jalC5 Ul' Lli11,iZ 11i011- H,Criueli0t1 ~icI~7o[!. ..,•[cEl7or3s for C'}j~•rjti- ~p. 2~5-2~$. ~ts a r,oiieiition ta ~ cal l13iniv.,:is of Wa(4~1• a37c1 W;ZSt-m" vlrox7mental Prot,ectlon Agency, Ofrice of 'T'ectinology Trartisfer, Washmgt,on, D.C. 4''L1"lSlilCC. C1cC731SIo0n nr ~1lFDfC~T71C31t f) l). ;301-20C. F'iiv9rot7rtifent,tl PrrSLection 20460, 19`T4. tiC1l fih ,'lII bCCOIIqe 0 ffec tivc. ~~~~~cy. Ofliee of '!'cLAtinolo;;v I'r:i►tis[Cr, ~ (b) Lf khe resu lto f a #.u a•I) i{j il.y -L t»ly-, i s rci! 'I'?lt l7rot'i: imis ❑f j):1r•'jf;x•apt3r, ~}7} W-101IllM10rj. n,,C. 20•160. 297+1. DI ~.11i5 st~rFioIl »bL;~~it}~i-t~firlii7ti S~~ICTl111i71-.A~,fJ1711C ~1fa.wr~~lio~i li~dzcntcs that tt-re rnaximu~~ allou•;iI~lc RTe[}iarl '.hict>>c,ds for Chemtcal All:L1ti•si; ]imit lias beett exceeded, tlie sanYpling c•01271flinlic4 wi4h L}7e maximmi) r.oizlam- and rneasurernCnt sl1a11 be ~~i7f~i'incd by lil~li7t I F!ti'C1 fDi' 1lILl'a to S~7SlI1 I}C CI Ct~:I'l111I1CC~ oC nter ~t~tiri ji. 1~#;. G«t~iF-011- resarnp3Ing as soan Rs praeticalile azzd arr G]ic 1aftsiG aF Libc ine7n of Lwo raznlyces, nien4ni Protc€:tinni Agtr~cy. OC`irc of preferabl}r wilhLr►,oz3e hour. If Lhe rcpeat wh~n a teveZ c%:e.eeclirlg the maxpllitam 7'ceh:zcrlory Trar1;sfcr, tVaslYinglorl. O.C. san3ple conflrms that Ltle Lna:eilnt~n3 aI- c0i]t~jrlil]az~t lev~l #'or rliLr~ate ts ic]tlttrj, 204CO, 19 N. Iowablc llriiit has been exceeclede the SUp_ a ser_ond aiz:tis•sis .9tinll bo initiat~ed witi)iiz tg) Si1vei'-t3#qralic Absorptiori Molh- plier o! ~~~ater st~alr repoi,t t~a Lhe Stat,e 2`~ ~loxi~°s. ~'•hcl if l,~~e iiicai3 of ktl~: t~~~•a od, ~~Slal~~al7•r~ hecL~~oc~s 1c~~~ k,}~e ~x- withirr 48 hours.'Y'Zie r-epeat .5ample SlzalE e%ceecis ttlC 111ilXii7llll1l colilrsni- ~r~~iR1:~~ar~~~ crf ,~~~keK• at~c~ ~~raSLCtk'~~,CI be the sRniple used for the purxaose of lnrir7t tevel. LIic supplicr of watcr sljall 13kti EdjLior3. pp. 210=215, or "'INfeL]7c~d.s calculating fhe nzortthlp average. If the rQPoi-i, h15 fli3ciiilgs to I,k7C Shtte pLBi'SLIallt for [:Elcmic~l Arq1ti•sis of VJ:xkcr arid t210ntrily average of the dadiy samples Go § 141 31 and s1i:111 notiFy tile raubiic Wastcs'". p. 146, 'I7,I1vll'QC7i13cI7i1l PCt7tCc- exceeds the rnaxinium uilowsble liiiiit, or PuWSlMrA Lo § 141.32, ttoti A ge i1cy, Ofiice o f Treli i7o1vg y Trairs- if the tLverage of tu•o samplcs ~.~fceiz via (e~ L'ca~• llie iniLial 31la;yses I•eqLiii-cd Scr. D_C. 20460, 1974. coiisect:tlve days exceeds 5 TU, tlle sup- by 3}ara~,~i-aR) h (a) ( t'r, t2P vr t 3) t)i t.t Yis {14) Fltani•iilc-T--.lcclroc;o Aie[hod, plier of watsr 5hai1 report ta the Stnto serkioll, cf;~ta ior sh~i-f~ce ~~•Ll#,crs gcqkai3-eci "~lmidarci Methar3,~ for• lE7c Fxnnihintion and notify the puk~lic ps directed fn c~Fecti~e ~l~te of 1't`i;sb~~ ;~ncl Waslc~~•atc~•~. 13t~7 ~:~lilior~, ,cqUir_crj ~>i►. or '~11ic1}1[~cls for C1rcr1zic.1 ~ 14131 arsd § 141,32. ft►tci r1,1t.1 for gi'OLInd ti;•atcrs q ~qc A,ya] 3•:,is of Waf.er ai7d GVastes," pp. 65- (c) Sarnpling iar nvn,caniiiititiity %ti-ithf n 3ycalsprior ~n tlie effecti~-c d- water systerns shall begln within two of tl~~s par-t nlaY be substiLutecl at llie Gr. F;nviranmcntal Pl'atcettoii Armit~Y, qeal•s after the eFfective date of tlils Par't. CI]Sci'eCki1i7 4t tlle StEl.t-C. OIl1C!-' ni TcHmolory ']'rrm.5fcr. l•Ywdi- ~ (C) ~l2i;tl~•ses coriciucled ta clete~•r7~aR1e D.C. 20,1G(1, l97~~, oi, C'nl~~ritilelric td} Tl~c requiremenGs of ti~1s § I~ 1...2 Mct}3oci wilti PrCLfr7llizary lDistitl,lt,ion, sha11 appiy ortly (o pub11,, wAter systeins ~Om67l'ancc w1tti § 141,11 slial1 he ziiade " S~zindard 'MeUiods for t]~~ Exft2»ill:ttROLt wtzicti itse watzr obt.alne+d 1n ;vhvle or 3n ltl ar.corcla,nce w 1L1i Glie Sollowftza of Wa tsz• a il cl Wn-5tcwaler." 13Lt: Etlifioiz, n1iM,hocis: r pa rt fi•arn Sl]rfaCe 5Ql1rCC5. f l ) AI`5e l1iC-- A~.C+i371fi f~1~]~o~•j~ fic~li IUie 4ti - r,~p, 1 i~--l f2 ~i1d 174-17$, ar "ri•ie~l~ads fo~~ oFi "i1.tetiioris for G)~c:nlc:aZ 14naly~~;ls of ,.Eicrtfical A r7z1Y, is of Water aild § L 41.'?:~ t~,~~~~•~~i►«~ ~•#►~•~~~~c„I ~.,~~~~~~li~~~ ~~r~~Ci' 1t1[~ ~~~s~~s,~. ~~r~ ~~i-~6, C:i3viron- VJastCS." 1}p. 59-60, E~~vi~'oli~nont:~] ~'t•o- ;~tb~l Agciicv, 4Ftice af f.cctian Agcncy, DffiCe of Tcckiiiology (~x) e1si~.iysea inl• tiic ~~lirpose of r!c- ''e~.titiolngy 'Ii1nsTei•, W:~s~rE~z~~lon, F~.C. Tr:~risfcr, ~~~5i~ir~~tor~, D.C. 20~G0, 1974. tei'f73iT]Ii7g coixtpl~Rp~e wiLli G 141,11 are 20460, 1974, § 141_24 Organic thenri,•M qn»tEFlirrg k'L*f{1111'ed :lt fO714w:,: {2} 13,i1`il11'11-AI,01711C A}7~;o1'ptlOil M~th- eintt urtinl}'Ciciit rerpiirc•mr,rila. ( i ) An21,yses foc' g11 comrtiilm ity tvatei' Od, .'SG,11iti;U-ri -NIctlloclrt for Lllr i::xami- (;y) Ai7 an~lyqis Of 4tzh.staiices foi' thc _ 5ysf.ralis utili•r.'tng filli'{m-.n w;tl,er ~r,~lrr:es natis7n of wa#.er ;ul[! WaslemOLet•." 1:3Lh pjtI IcxC ({e~,t~i•i71I I fiI I g C,C7111~7~1:1t3({~' 11'it11 stmll bc ccriiipletcci ti4'ilhirf ot7e yr:~r fol~ r~ci14fon, p1). 210-'~1), €~r "~i~te~iltr~s`IS for ~ I41.12 sh<<]i be macle a; follows,: ]nw9t7g 4tic cffcctivc date of tt7is part. Chemti::'fl Analys9s o[ Watcr and ~Vasi,cs;." ~ 1 k- For nIl coninliiitiity W-3 Gcr -",Y:";tcrt}_q 7'hcsc analyses shall kae remakcd aG 1)1}. 97-~{~. ~iy~•It•oi~r~7~i~t:tl 1'i~oL~~;ti~yi~ 11i,g1i~,ilIg s~~efar,C yea i1y in te rVa is. Agency. Of1'ice of Technoiory 7ranster, '01;111 bc corttipfetcci wiliXin aiic yeai Cvl- Analysrs 1'nt• all cuii7iitKit3ity xvatrr Wa0hitlgLaai, D.C. 20460, 1974. Jowi1lf; f.Etc cfl`cclive ciatr. of Lhis par-t, systcrrks uGriiziiYg oill~ prolltrci w.ritcr {3} G:admium-11tnnric Ab~avpt3ny1 S:knjlslcs ,L~lj~il I)c c:oljcclcrl dur- sfiLlrce-5 5lball be cor3tplctc:d ivilfiin tsk-o Afethozi, .,SGanciai-ci ,%-IcUiotis faT' tt7c L%- I]i[, Lhe vcriod of tlie Ycar c1e~iunatcci by. -~•c~r~ frallawing lllc c[Tective dnLe OF t1lis am9nnttort of Watcr Ritti Wasl.cwatcr," Lflc State :YS tlti(, period whc!jj c011E:jrttii, 11art, 'I'tiese alla2y-ics ~~zalk be repeated 13th T'dstiori. pp. 210--215, or ,.McLhods I72hozl btr Pcstic€des 9~ 1i7osL likely la at Uzi'CC-yCar li]tei'v,,tls, for Clieniicai Anal~.c;is of walcl~ and ocmll•. 7'lxeso ~,r}aIybcs Shall be rcpeated f3) ~''O1`T7~l1-C'OlIlll~ll~]1~Y1~R~.Ci'~~'~~,EI115, IVF45Le5." P1J. 101--103, Eil%'li'{711 iT1QZ7L~-11 ;lt 1T7tekT.21S SPCC]fied 4}y tl7L` St-,ite t]LIt whel.her %uppliecl by surface or grotind Protecthotl Ageiicy, OlFicc of Tcehiitringy iry 110 event less frequen41v iliryiti aC threc witer sOurccs. 311"Ov,5es foi. 2iitraLe stiall T`=-nnsfcr, Wa5211k3gt0n, D.G, 204G4, 1974. yc;l r ilit,cE-vats ~ he comptcCcd withilti two Yc.-I3•5 folIowzl7g (4) C}11'4m1uiZ1-AtUMl3C 11hsckrEyiion FDt Cfriilll3kl411t}- ~ 1k',jIcr l.lte cffective date of #his part. Ti-icsc Nfe,L110d, "St.'S11drzrd Mclhods for the Ex- uf iliziiig nit1y Crasj]jtt watrr soljrcefi, arnft7atinrt of %Vatcr nnd Waslewatcr," I I I RULES ANl) RE:GULATIONS alyscs chnll bc conmlelccl bl• lhosc s}•s- (61 Cr_tihmi-l:i s- r1S'i-14 D-2-15f► it~~:sl~•~r~s of fuur S.1m11lV:; obt-M>>eci nt lcnis smc;ified b,v I,hc Stalc. "Ganmm Sprclrometry in NV,LLc:r." 1975 nli:trtcrly intervrils. rbl I[ t1lC I'CSuit of 1n nta~lr Airnirrii IJur;1: oJ .4.':tl ,Slriirtl~titl.c, Vti'a!c~r (1) A grc~sti 1I~)I1F1 ~~.trticlC ;►rtivity . }nlrsumit, to pira;r.tph i1$ of t,his sec- a ucl Alync,spheric. Antrir;cis. Psirl 31, »>cwurc•iucnt n►vy hr subeLituLeci for LhC tio» indicates tliat tlic let•^I of a»y coii- 1lnicrie:i.n Scx•ic•ty for Testlnc, :jclcl rcrliiirecl r;tcliiim-226 nncl raditum-228 L;►minlut listerl in § 141.12 Vxcrc(ls tlle mil::, Plifl:tclClphj1. PA. (1975). a>>;ol~si• 1'ruvicird. Th,tl llic nic:tsurcd maximum contaminant icvrl, tlic sul)- (71 Urqnium-AST,%i ll-2907 "Micro• :11plia l".11'11clc:irliv1Ly ciocs nut-ex- plicr of watei• sh111 rcpoi•6 (,o the Stale c111211lil.ir,s Oi tJra»iu»i in Nti'ntcr by (:~(,d pf i 1 st n c„nfidt-ncc Ic%•VI o! 95 wit.hin 7 tl;iyc an(l inil.icitc t.l)rcc ndcii- F7itornnietr}•," 1hir,l MrrCiil I l.f-5a U11VI•c i-S, tllc :,Ga»Vl;ircl tintml n1111yscs tcllllin oitC »»>>lh. 01)► V:'heii thc: iclu>>tificatioil IiIci n«;~•_ ~Ir~~i;tlic~ii c,f thc nct colinliilK ratc 4f Cllc (c) NVhen Lhe nvei•:tgr; of four an::lvses ~~~•i~~u~~iiL (It radioliuclicl('s other thr►ll ~:~►~►I~1~~~. 1n loc;ilities where rr►dmrn-228 Macle ptusuanL to ;►1rttt-1a01 11)) oI Lliis lh6sc li::LCci iil p;ir;tt;r,ipl-► (:v 1s T-eqtiired. in clrinl;inF w•ater. It L; sectioii, rou»cjecl lo lhe ~an~c »~init~er ()f the f(Muiving rrierence^ nre to he usrcl, "ct•AiM»L-cicied f.h:lt lhe Stnte rcquire sif;iliiic.,111t fii'ttres ac tlie tr.a.xiniunt con- v:rellt in ra`es ~~.herE, sillcrnative r;iiiitim-:':.'f, ;tnci,or rcicl:iint..328 annlyses taminmut lct,el for !,hc sut~::lanr,c in Iilctliucl-• hnce l)pcn il~)j)CfJ'y't~c? ~~i arr.c~rcl. whcii Lllu c;i uss aIl,}i;l 1)n1•tivlc activit,y cx- tion, cxcce(ls thc maxiiniim colit.,inl iilant ouco W►lh : Hl.27. ccecis ^ pC'i 1. Icvel. tlIc Sup))licI• of wat^r :;lial: repoi f, c 1i 1'rnerdurrs Jur l't Mroc•11cm irct! 'il l \'JtiCn thc gru."•, r111,lm ~mrl.:c lc~ ta t,he StaLe pUrsuatit to .r`' 1•111.31 qnd t;i~•~ ~~~io,+l.0c o1 ,Yuclcwr r^urlor ARtrroirs Sci- orhvi(}• rxccrcls 5 jpt:i/]. thc snnnc or nti not.ir.e tt) tlic p:lhlic j)ur;il;liit lo t 141.?2. Iurior.c, 11. I, t:nct;cr nnd S. C;old, FE'A- ewliva1-;il, s:unpic ~h ;Il bc n»nl;;zcd for AToliilorinf- after p1I6lic: itutification sli;iU 114-73-014. USI:I'A. Cllll'lllllllfl. Ohln. I•:tclmin -32G. If Lhc coiiccnlrnlioii of bC it 1 Il#,qticncy dcsi[:►illCCl bti' L}le Sl;ltr T7ryy 1973. 1•,itimni 226 rxceccls 3 pC;i/1 thc smuc or atiti shcill Contlnue tintil tIlC nlaxir"11ttnt (21 11A•51, 1'rorc(irlrc ltftrnilcrl, I1."c{Itetl ~1n eiiuivalrnL ~.nnnple sli:tll be analyzed coiilaininaril 1Ci'rl 1115 IIUL bCCU f::rccdcd by John 11. I-farle}•. I-inSL, 300, I:RUA fLOr racliuin-'''!?t. in LWo succe5siti•e s:11111iles or uiitil a I-Ie,~llh and 5afety Lnborotor>•. Te,.N' I,ur t.lic inil.i:il au;il~:is required b~- moniLorinE; schc!lule 75 a cc►>>ciitio» t,o a York. N.1'., 1973. ~ I,;~~:wrol:h (a) 1 li. cltitci .icqttired niLhin variZnce, exemntfoll or en[orcemettf, vr- (r) For Lhc purpoce of tt~Ut~iL~~•i~~f~ one yv:ti• 1>>•ioi• t-o the e(Ir.rtive C1aLe of t,his tioii shall becotne eCfect.ike. rarlmacLivitti~ ronrc>>tr;itiuns in di•inkinl: !'l i>>;«• be -jtil>st.il.tiu•d at the discrc:tion (ci) I'or the iniLill analysis 1-er1 uirCCt «',"ter, t,he rectufreci sensitiviL}• of LI~e of 1.h". 5tate. ' by para~raph 011 (1) and (3) ot bllis rnclioar1tilY."is is (lcfiiieci In tcrjiis t)f n c'.c•- 13 1 Sul1l1lit-rs u[ \%atcr niui►itur nl section, cl;tta for sur[ace wltcr aCcluireci tcclfon liinjt.. 1'he clct.cc:tion 11niiL sll;ill 1coti~ (m< vvc:•s• rour yc:irs follnwing thc \vit}l1n one ye1t• pi-ior to Lhe efTcctj%•e be th1t colit•entr<<I.ion n•hlch ran be f)rurrdunrr, i'eqtiirCd bypiraFr1p11 (a) (1). date of tliis part ancl clata for gt•oun1.i count.ecl wilh t► prer.i<ion of p1uS or ntinus At f'it, di::r,ret,iorti of i,tic State, ivhen nn u•ater acnnired within lhl'CC J'C1C5 p1'101 10n perrecit :it tlie 95 percent ronfident:e o»nnal rccoi•d taken ii: conformance «'lt1i to thc effective dale of this I~arL may ue lPve! (1.96o wlicrc v is t}ic slandarcl (le- 1~ar<<t;ropti (a) (1) lias cstablishcd thnl substltuted at the discrclioii of thc St;jle. vi-itiuil of tlie net count,inE; rot.c of ttlc t.lie avct;i~:c annual rniirent•rtttion 1s less (e) Analyses 1111(lC LO CiCfCI't11111C C,0111- So iii>>le) . lh;m lisilf l,lie in:ixi,nimi contaii►innnt pliailce witti § 141.12(a) sha11 bc made (1) To detcritiitie co~n~,li~ncc ait•h lc~~~~l~ r~i~iblls}ied by § 141.15, nn~ilyr;is of in accorda»ce n•itli "Aielhod foi' 01g1110- § 141.15 (n'~ tl~e detection limlt shnll nol Ft 5iil,;le e,jrn~,le n~~i~~ hr subst~ituted for c}ilorine Pesticides in Incluslrial F,fllu- exccecl 1 pCt,'l. To cietermine complianre thr c{u:!rLerls• sanipling procet3ure re- enGs." iN4DGZARL, EnvironmenLal Pro_ with fi 141.15(1), l}ic dctr.cliiin liniit ~,lt<<II qtiirod hy p.tr;ip'tl})ll (11) l l). tcction Age»cy, C1I1C1t1111t1, Oliio, Noti'em- not. rxc(,c;d 3 pCi 'L (i) Morc freqticiiL nio»itoi•iiig shall bc ber 28, 1973. 'fo dcternii»c coniplilnrc \001 k' 011<il ►rtrd \rheIi a•dcred b~* tlie St,►te iu (f) AIIalJ'SCS 1T11CIC to delrrmine cum- § 141.16 tlle cir.t,ecf,lon Itnd ts shuiJl iir4 ex- t-Ii(' vit'i►iit3, of niini~ig oi• ulher operatlotis pliance tvith § 141.12(b) Shall be coil- ceed l.he cuncentrat•Ioiis ]IsLed in 7:abie B. R•hi'•li m,iy rc;nlribul-e alph;t uartlcle ducte~t iit accordance ~,~ith "I~~ethncls f~~r r~~~l~~:~' ~.i% it:' to eillici~ <<urf;►cc or vrouiid Tnrrt• F3-•-UrA►c•111Irv Lib1C1ti FOfl ~\tAti-1f\i-l \~,Il('( --,1l111'('(jti (lr (il'lIl}i1IlL; 11'atoC. Chlorinated Plienoxy Acid Herbicide5 In nr:rn r.+n*rtri.r AUu P,co•r(N;: Fa,rr°►r«s A s„pp]ier of n-aIrr sh;ill nio»itor Industrial EfT'iucnts.' A7DQ:1EtI.. En- H~~ r~>>ifc~rinailcc ~~~itti lrai~n~~rnt~l~ fnl(1) V!i`a11111B11t~11 P1'OLeCL1011 AgC11CJ', Ciiicin- '~'l~'~!'~:Cliri,• f)clt•c (intl ri~^! n nati, Ohio rlovembei• 28, 1Ji3. 1""""' 1 •~~~'0 t'('~ I ~t-iLliin c~io ye;ir of t)jc iiilrocltirtioii of n ~ Str0~111iuiu-V _ . . . IU 1) c;i i nr- x, ;i,.er SUiirCC fUr n coiiiniunity wtlWr Strontillil►•9n . IWt i ;.~~;:ft•ttt. A7rire frequent inci>>lariiig slinll ~ l 11.25 Annl.-ticiil M~•~lin~ls ~~r lii~~lii1• ln~~iii~~-1:t1 ►~~C'i •I l~c t•(l)-cltic'tccl ~t'hCt~ orc3ered by thC Stttte nciivity. ~ I L' i)CI I in thc; cvciit oi possiblc coritzimtuntion or Grv.,., 1)n13 . . i 1) c'1 (n~ 'I'he metliocls speciflect iit Ir,te•r•r'r~r Otl;~•l• ~~,,cil„n~~~-i1~~c: ,,E ,i.:. ~t•1~~~~► rl~;,n~-r~~ in the disti•ibutiu~t systetti • RcidiocltcnticRl 111ctlto[loinyy Jvr Drinlc- ;tt„ii or trcatiiivnl processing occur wlilch mny ~ i».g j4'ater, Ettvlrutiineiitll Monitorlng t>>crease the concCntrntioti of raclio- ~nd Sunport L~,bor~,tory, EPA-600/4-75- <<i► To JucigC COtll~)l1A1)CC wi~.lt tt,e Af.(I1'iI.}• in fiiilslied v~alcr. mt►xiniium contncuiu,itit lcvcls listeci in t iii l A comtiiunit5• watCr syslent Uslttg 008. USEPA, Clncittnatt, Ohio 45268, or sectioiis 1-11.15 find 141.16 n~•r~~;~t~<~s of t%,;nn; itie»esou►•rc5havlnF dl(Tcretttcott- those listed below, ni•e to be used to de• c3;,t ,t ;;l-iitll be useci nnd sh.111 b e cent.rni,ioii.:, of raciloaet,ivity shall moiiitor tennine comolicuice with §1 141.15 ~iid rout►ded to t.11e sn►~~e »>imber of sigttif- ~ource aJ:~ter, in lcldition to M1ter from 141.16 (rEUlionctfvity) exccpt in ciLse9 (eiint flgiircs iis the mnximimi cont,nm- -t irCC-IIONing L1n, w11C11 O2'CICI'Cd IJy Utc wherc alternative methods lizve bcen nll- Inn„t Icvcl for t,l►c siibst;iticc in qucsLiori. st;t LC, proveci i►1 accordnnee «'lth 4 141.27. (1) Gross A1phn nild IIctn-Mclhocl § 1 11•2 6 A1„miiioritig Frevquio•m•, fur Kn- ~tv' rTonit,orin;: fcir compll:lrtcc tt•Ith 303 "Gross Alphrt sind 13cta Rndioactivlty dillnl•661.1 in t;Mn1n1unicr W:►trr ti,b. 11.15 ,ifl,cr Llic initi:ll periucl nccd not in W1tcr" Standurcl Afcfh.txls Jur lhc Ex- 14'111'4• iiicliiclc rciclium--228 ca:ccpl tl,lir.n recluircti . uricinccliun o1 L~ate.r a7i~l ►t~asf.cwntr~r, (a) 1~10ii;(ot-iu~; requireciienis fur gro« Z~le St.~te, 1'rovidcd, Th1t the ~~~eruge 13t11 Editlon, tlnicricaii Public IIcnll•1i nl~~li;~ part•iclc nctivlty, rntlium-22G nnd '~1'~~~~~1 cc~i~ccnLr~.Lioci of radium-228 h;~s Assocletion, Ne~v York, N.Y., 1071. raciitu-~i-23f3. ycei~ assa~•ed at le~st once using tt~e (2) Total R1dit>»i-ATethai 309 "rtu- ( 1I Initi:~l scu~i~,lii~g to dr.~ec•Iuine cum- ~~~~:~~•t,erly sa►nnlm~ pi-oreclt~re reqtiired by , dium in Watcr t~y, PreclplLatlo►1° Ibicl. I>li.ii~cc ~~~itli E 141.15 slinll bcgin •.•ilhln ~'~r`~~'r`~~~~1 ~a~ (1). Supj)licrs of wittci• shall roiidtict (3) Radium-22G-Methoti 305 "Rttcli- Lwo yeni•s o[ tiie efTective d;tte of tllese ;lillill~1 fl]UI11(,U]'lllg af ;►t~y commuiiit,y um-22G I~S~ Radon in Wat,ei•" IUid. rrf;i~l[itior►s ntid f.he analysis slirill be ~t•~t,e1• s!•sLcin in ~~~tiic)i tllc 1'1CIllllll-22G (4) Strontium-8J,90 - A~iethod 303 cc)cuI~leteci ~ti•ii.hin tliree 3'ears of ttir c;f'fec- Go~lcentrat,ion exceeds 3 pCi!1, w}ien oi-- "TOCf1I SL1'OlltlUtll aiid Strontitu►i-90 iti f.ive claLc o[ t.hcse regulatfons. Compli- ~irred b•, tlie Statc. Watcr" Ibid. niic(i shall be ba5cd on thc a»alysis of ' (5) Ti•itiutii-A7ethocl 306 "Triiiiini in an annual compusite of four cotlsecutive \V11,er" Ibld. qu;lrterly saiiiples or the averagc oI thc ~ J ~ RULES AND F+.EGULATIONS (4) I[ the £tvcrapc Znntill ma::lnmm Tf tlic Iicl"ti pa.•lio1f? ,tctivity in n. lu Ilic c•x1cii6 Ilint tiic interc•onncc- conLan7inaut Icvcl fur rross alptia parti- satnplc c:;CCC(I., 15 1. thc or rin i„n :,t the s, %-r,ni; jusilios In.itinl; llirni clc 1ctlvitY or tot11 radiuin RS Sr.t, fOl-l}1 rqiiivalcnt, «tiipi~ sn:ill Iir :in:iiVZcd foc ^.a ~iiil•lc m:.irrn for niolliluring piir- 1n § 141.15 15 Cxcccdcd. tlic suppliCr of a t:i r~iiLi~tt~i-~~ sind c:~~ iuni-13•I. 1f Ih(, ~:rc~ss r.,: n,~~~• „~,,,lifi~ ~I n~ni~if~rin~~ slinll bc COt11I11UI1lLy w1t,cr systcin shall givc r4- l)cl.:L P1rt,lr,lc act.lvil.,.• exrccds 50 I)Ci!l, ,•,;~i,l~irl~•cl lmr'ii:iiil (t) :i lleclule :;wr.ci- tlce to tlic St~1Lc wur5ulnt to 3 141.31 lncl an nii;111•sis of thc :;nm>>lc be ncr- lirct 11\• liir .intl (•uiiciirrCcl iit by Lhc tiotify Lhc pub1iC as rcqttircci bl- F 141.33. formccl to 1dcntify fliC ma,ior ratlio:tCtiVc Ari►iiiiii-tr:illor c►f the U.S P:ltvironti1^nt:►1 NIotiiloi•ing at quartcrlv tntcrvals shall CnIlSlll,liCilf ; prc:cnt ancl the nppropi•iatc I1rulcrUon Al:oiiry. bc cont.iiiucel until the anntial 1t•crnfzc organ ,+nrl tot:il boclv cioscs shnll bc c'a1- ~ conccntr;~tion no lont;cr cxcrccls ilic cliLtL~,I tc~ (lctrrnli>>c cnt»~~lialicc n•it.ll •'~h}»rt D-Rc~~oitinr, F~~,I~lic MolificalioN maximum contaminai~t lcvel or llritll a § 141.IG. a~~d f~ecorcl Keeping 1110111t01'U1g SChrCIIIIC :lS A C011C{11.1011 t0 ,t f111 FU!' lo(1lI1C-131, ;L C0111(lt)sife O( § I I I.3 I I(cliurliiig, r~•~~~~irriu~iit•. variance. exemliliotl w- CiiforCCinrnt aC- fi•.-e CoIlSCrUlIvC (l:tily !-;i!nEtlcs sliall br_ ,.i, ~-\,•t.~,~ «lii~rr :i si~.)rlCr rCE~~~rti~ir; Lial s1~1ll becoctte efTecti~•e. ;llln)t•"l.(:lI rnice rn~~l~ quar{,ci•. :?s t~rcleresl I r i i~~~1 i:: ;.perifircl ill llir; Imrl,. tlic tbi Mo»itoring rcquircincnts fo)1' 111;111- by II1C SL1L('. I11f1CC frcriiic:•,l. inoililorin~~ Ippliri „f ~~:ltvr - 11;111 1-rprrl to llic S1a1l: tna:lc racliolctfvit•y itl CO111l11Ui111}' w:1lCT 1:hnl1 l;c I-rnlcltirlccl «•hrn 1ociinc-131 iti %%;lli1ii 10 c1;1\!, follwa iu;: :1 111c;Istirr- systcrtis. it(Cntifirtl in thc finilticcl -:;icr, 111riiL (it :IiI•ily:.is r, ([uirccL f() bc i>>aclc by (1) tvithirt t.n•o cc1rc , of the c(i'rClivc riii► Anr;tii! :`uoniloritll: for stroil- Ihis lyirl, lile rc ;ult, of tli;if, test. iiicas- ti11.c of this n1r•t, FS'Steilis ttsin't; -~'urf;1CC t.i11111-90 111d tritiu►n shall bc coiiclucted ti~rnt, r~r ~:i:~l~'~is. watcr sotu-ccs and scrrin~ mor"~ lli:ln , ~ 1~~~ mr_<1ns c?f the acIalti•.,is of a cornpar-it, ~ ~I►~ 'I~h_• ~~,~,~•li~~i• cif ~~.c~lrr sllull rcl:urt 100.000 pcrsons and such otllcr com- o[ fotir coti~vrtttivc: (11.1a1-i,erly s:L:nplcs or lo the Sl;ife ~%illiin 48 liourg llie f;iilii►•r munity water s;stcn7s as 1rc clesignat.r_d aj~~lyS1S oI four n>>nrtr.rly sannplcs. Thc lt) ro1i111l~• x~ il h:ui~~ ~~tin~ary cl►~:qikii~~ by the St~~.te sliall be monllored for com- l~;t;,er procedure is recammeuded. ~~.;~le~• rej ;ulali-111 ~ iiiclutfin- C;tilure lo pliancc n'ith 1 141.16 by anllysis of (i~.) ~i~St:~tc niav nllo%v the S~ti)~ti- rc~tn~~lS• t~itl~ nionitorin6 rc~~i~ircnicil:il composite of four co~1secuti~~e ~iuarterl~• titt.ian ot envirottmentnl surveillance :,cL loi tli iu Iliis I aiL. sa.mples or analysis of foitr qullrter15- dat1 taken in cunjlinctioii with a nuclear tc► The tiupplier of \~ater is iiot rc- samplc5. Compli;incc with § 1•31.1G may r1Gilit,y fr,r ciirccL 111ptll~l'tllg of II1111- ~IUII(`{~ t0 1'C}JUI'L:tll:1l~:tic•nl resiilts lo ttic ~ bC £15SUf17CCl ~rithout fuitlirr :lll;lly'~1S if Ill:iCiCI Y:lCjlf)1Ci1Vlly f)5' 1.)iC 511pp11P1' Uf :'1ah` Ill l';l,~f C\l'h1'1'C SI SI,ItC labOT';1t01'}' thC ab'CI"1Se 1I121Ui1] COIICC'lltl'.1L3011 of ~1':ltCf' ll~1Ci'v 1.}1C :)t1tC ~lefcr»►ftiCS SUC~1 I~`1'fc~l'll!: (l1C ~111l)'cl:; ;111(~ 1'~)f1C(C1,~1C gi•oss bet1 particlc activit,y is Icss ~111I1 C11L:ti 15 ai~~~licrib)c tn u~~;~rt,icular cc~iii- ir.:tilts tu lhc St:ilc oflicc ~~~liirlI ~~•ould 50 ~~Ci/1 and if the Zvei•afie :innu:~l coii- nitinity n-atcr s~-;;teni. ii,~riiially I•cccit•c surh tioti("~cation trom cci~trations of tritium and strc►ntiuin-JO 1rc less than thosc listed in Table /1, Pro (5) If thc qc~praE;c nn►ittil iiinxiniutn 111^ `~►I1~1~1icr. - Lided, That if bot•h radionuclides are cocitamin,tnt le,: c1 for man-made r.idio- ~ , . I 1.,3 I,iI,li~• n~~tif~•:~il~~,,. ncLivit,5• sct Ic~t•Lh u~ F 1~1.1G fs c~ceedcd, present the suin of thcir anntial dosc equi tilc qtx'rntor oI R rnt]1t11111')iy n•nt,er sys- :l ('f1111t11i1111<<' 1\;ltCl' :~•"l~~ni f;lils ~~alenGs to boile marroa• shall not ex- , Give noLice to the St:tte pttr- tu cninpl;; 11-illi ail "I>>l•licaUle 111axinttIriI ceed 4 m111u'ent/year. tem shall !i) Ii the gross bet,~, pa.rticlc 1r~1~'!~~' Silsint Lo ~ 141 31 and to tl~c I~t~blic tis rc- ~'oiil.i~i~in:i:~l Icvcl cst:tl~lishr.d iii Subp,irt cxcccds 50 pCi/1, an analysls of thr s1m- quirCCl by F 14 1.33. ZTonitorlng nt 13. I.iilS to r.nmply with an 1pplicablc ple mu.st be performed to identi[y the monthly- intervak shall be contlnued ui1- tostiii;; m-occciure ectab;ished tn Subpart major radivactive coiistiLuenGs present til the concentratlon iio ]onger e\ceeds C oE fhis parL, is [;rtuntcd a V1I'1i111CC O1, and the arpro>>rial,e ot•gan and toUil baiy t}1C IT1aX1[lllllll COliL11111I7iI1t lCi'C) OC lllll,ll 11l ('\t'It)Pll0tl f1'plll ;lil AlwlIC:lt)lC ill,lXl- doses shall be calculated to det,ermine 'L monitori►i.-I schedule as a condition to immi rontnminnnt, level, f.iils t.ooconiply Conipllance with § 141.16. ~~'7C1a~~ce, exem~~tion or enforcerneiit ~~~iili !1l~~ re(tuiren~eut.s o[ nny s~hedulc (ii) Suppllers oI n•ater shall conduct action Sh1ll becoine effect,lve. ))I-esri lbcd ptii:sua►it to 1,arilnce or ex- ~~1io:~, ~~r fails t~ ~~er[orm ni~~ ~ moni - additional monitoring, fis orderecl by the ,~11,.,.,,;,~,~r ;~ti;~l~ii,:,l i4•rl1- cni torin.-, rr,(Iuirecl pitrsuant to Seelion 1945 State, to determine tlle concenti-atiori of 111liIICS. ~;tt nf thr. I1ct, the supplicr of wuter sha1L man-madc radioactivit,y in priiicipal ~va- With the writtcii pcriili:sion n[ tlle nuf,ift' pe1'sons sci•ved by the syslcm of tersheds designat,ed by the Statc. Sta(,r, conctirrod in b}~ Llic AciniiilisLra- Llic f;~ilurc or Srai~t b~~ lncl►isioii of 1 uo- (iii) AL the discretion of the Sl,.ite, to,• ef t,he IJ.S. L:~i~lirnnmentnl Prolec- i►ce in the first set ot water bills of tlte suppliers of wlter utilir.tng only ground tio:~ At-cnct•, an altPrnativc ati:+l;; tiral s;'stcm is:;ucd after the failure or grant waters may bc requlred to monitor for te,,}1>>iqtic »iay bc cmploycd. Aii aItcrn:i- and ln any event by wrftten notice witwn ma.ii-made rldioactivity. tive t.cchnlryue shall be :ic,c~eptable only three moiiths. Such notlce shnll be re- ~ (2) For the initial anfilysis requirecl if 9t is suhstantinll,y cquivtilrnt tn the peatesi at least once every threc months ' by par-agraph (b) (I ) data acqttlred prescribeQ trst in bol•11 precisinn 1nd ac:- so long ns the systern's failttre Contlttues within one year nrior to UZC etfective date zlil•acy as it rclntes to tlie deteri»in;iti4n or the vlriance or exemptlon remalns Ip of thls part may be substlt,utCd ttt t11c of c;nmplia>>cC willi auy maxintum ca»- eRect. If the sysGem issties water btlls less discretion of t.he St~zte. L;tminniit level. Th;; iisc ot i,lie nlterna- frequently than quarterl.y, or does not (3) A.fter the initial utia1S•sis required Lice ,111;115•ticzl Leclitii(iue shall liot de- issue water bllls, the notice shall be made by pari.gi-aph (b) (1) sutvllers of watr.r creasc tlir frecliiency o: i»onil,niiuQ re- by or supole►nented by another form of shall monitor ut least evciy four S•e:u•s (iuireci by I,tiis prari.. dlrect innil. foUowuig t,he pcocedurC eiven 1n para- I I I.''li A4•iI I,0~4 P r ,t I t „•if (b) If n conimunlty tvnter s)•stem hns graplt (b) (l). fnllc(! to coml)ly wftli aii .it7pllcable max- (4) Wit.hlil txvo ycnrs of tlie cRcctive For LI~e wuri)mc oC rlrlri•r>>ini>>g cuiii- li,itun contaminant level, the su>>ller of date of thcsC rC~*u11Li0ns the suppllcr 1~ii:>>ticc ~~~ili~ ~ 141.:,'1 throuc;h k 141,.;7, water shall notl[y the public oi such fail- ot 1ny communtty watcr S)'St!`ITl dcslg- tiomlilcs nt:iy bc con<iclcrccl aiily i( tlicti• l2rc, fn adciltfon to the notiticatlon rc- »ltcd by the Statc as uLilizinl; ~ti•atcrs 11.1vc 1~^ei~ an; Ivzec1 by a lahoraiory 1>>- puti•ecl by paragrapii (a) o( thts sectlon, COI1L1I11IIl1tCCI Uy cflluenGs froni nt►clcar !)►ovccl• Iv l,hc Slatq cxcct)t lhat 7ttc:tS- n5 follows: faciliLies slial! 1ri1tlAI,C qll:il'LCI'ly i11011i- Ut'rnicnls for turbidiL", ;in1l fcec chlorine (1) By, publicatlon o» not Iess Lhnii toi•Ing for gross bcta pZi•ticlc and Icx3inc- re`~it!u;i1 ni:«• he licrfnrmc;(l by ;tny 1>er- thrcc coiisccutive da p i - 131 1'f1CII01CtIVlty 111C~ a1111UQ1 l110111t01'lIl~' roii acce~~tahle t,o tlie St;?te. )'s fn a ne~rs 1~er or for strontium-90 and trltium. ne«•spapers of general circulatlon lri the 0) (Zuartcrll• monitori~~~ for ~;i•oss beta § I 11.29 ,li~~,;i~~r•i„i: ~►f runr~•~•uli~r (rnli• (1PC1 SCI'YfC] Uy t}1C System. Such 170tiCE I~~• .~t~i~•r sha11 be Gomnletcd within fourtcen da particlc activity shall bc based on tllc Ys atialysis of monthl~,- sample. or the an1- 'A'he» a I-ul%1ic waLec sy;tctrn su~;>>li~•~ n«er the supplier of water learns of lysis of a composite Of ihrcc ►nonttily «',ilct• to nnc nr nlorc; ollivr Piiblic «';ltcr thc fallure. 'samplcs. T'Iie formcr is recommcnded. "slcius. Illc c-1.1t- ~uas• IilacliCy' tlle nloni- (2) By furnfshing a copy of the notlce 1oling retItfirelnciils inirosed hy tliis to the radlo uiid tclevislon statlons serv- -6- . , ~ . . _ RULES AND REGULATIONS fng the area scrveci by thc system. Such tltis pact shall rct'lin oil iG5 prcmisrs or notlcc shall bc furni~hed within scvcn at a co»venicnt la•.►I,ioc1 IlC1C 1ts prcrn- days after the supplier of w•ater leikriis ises t}jc followicir; rccorcls, of Lhe fatlure. ta> Rccords of blctci ivlo(;icil an;►lyses (c) If the arCz s^rved by n community »>acje pursuant to t1iis p:irt shall be kept a•ater system Is not servecl by a ciaily for i►ot less t,h1i3 5 y'ears. Recarcis of newspaper of generll circulallon, notifl- chemicll 1n11}•ses nt:tcle pursuant to thts Cation by newsp;tP^r rerynired by parl- P"'t slinll bc kcnt for iiot lcss than 10 graph (b) of this scctlon shall tnsLcld bc J'cais. AcLu11 l;iborat,ury reporGs rnay bc gtven by publicatioii on three ronsecutive keut, or d1ta, ma5' be tr:►ns[crrccl to tab- weeks in a wcekly non•sparer of bencral War Su+milarlcs, providcd that Lhc iol- circulation EervinF the ace1. I( no weekly lowin6 ui[ormatiorz is incluuied: or dlily newsnnper of ,r,eneral circula- ( 1) The datr, place, 111d t1111C of szm- tlon serves the nrca, nolicc shall be given 3>>infi, 1nd thc n<<mc of tlie pr.rsott n•ho by posting the noticc in post ofliccs u,ith- collccte(l thc sa111j7lc; in the area scrved hy the s:rstem. k2) Identiflc,;, tion of ihc samplc 1s to (d) I( a non-communiL; waLcr SyS- µi1CLt1CC it w1s n roul,i+ic dist,ribution tem fails to comply a•ith an nrpltcnble Systeni sample, chec;: sarnple, raw or maxlmum conta►ninant level estabilshr_d process water sarnple or other speclal in Subpart F3 of tili5 p: ct falls to co:nlaly purposc samplc; wlth an anplic;►hic tcstizig nroccdure 13) Dutc of analysts: estahlished in Subnart C of thls part, Is (4) L1>>OratorY and p4i'Son rC~po1tSiU1C granted a variznce or an cxcmption from for performing analy5is; 1n appllcable maximum contarn9nant (5) The analytical techniqueJniet•hod leti•el, fatls to compl5' n-ith the requlre- used; and ment of any schedule rresCribed ~+ursu- ~rr~e resulGs of Lhe znalysis. . ant to a variance or exemption or f111s to ~ecords of acti~n taken by t~~e ' perform any monicorii~g requtred nursu• s~~stem to corrCCt <<iolltions:Uf ~~t~1m:~ry ant to Section 1A95~~t) of the Act, the d1•inki~ti, -.~•ater regulations ~h<<ll~be ke~~t supplier of water shall given notice of f°r a period not less Lhan 3}'CQi'S aiter such failure or grant to the persons the ]ZSt action tnken «•ith resUCCt to the served by the s5'stcm. Tiie torm nnd man- plrtfcular violltion involved. ner of such notice sliall be nrescribecl by (c) Copies of any n•rittcn reports, the State, and shall instire that the Su"i'naries or commtinicalions rellting publlc u.~zing the s,stem is adequate15• in- to sanitary surveys of thr_ systelii con- formed of thc failurc or ~rant. ducteci•by the syst,em itself, hy a private (e) Notlces 6iven nursuant to t•liis sec- constilt-int. or by any local, State or red- tlon shall be written in a maiiner reason- Cral agency, shall be keRL for a period ably •designcd to inform fiiiiy the users j-iot less than 10 years after completion of the system. 'I'lie nolice shall be con- of tlie sanitary survc5• invulved. splcuous and sliall rot use unduly tech- <<>> Records conGernin;; a~•arinnce or nlcal lai~gulge, tinduly small pri►it nr cxein~~t,iotl grznted Lo t,hc systcro shall other methods whlch «•ould [rustrate Lhc Ue kept for a nerioc3 ending not lcss lhln nurnose of the notico Tlie notice shall 5 Years tollowing the expiration of such • disclose all mzterill facts ref;arding the varlance or exemption. subject Including the nature of the prob- , lem and, when anpronriate. a clear state- ment that a primfiry clrinking wnter regulation hns been violated aiid nny pre- ventive Ircasures that sliould be taken by the public. NVhcre appropriate, or where deslgnated by the St1tc, bllingual notice shall be givcii. Notlces m1y include a bnl- • snced expluilatlon of t]ie slgnlflcance or aerlousness to the publlc health of the subJect of the notlce, a falr expiznation of sLeps t,aken b3' the system ta correct any problem and the results of any addl- ' tlonal sampling. I (Y) Noticc to the pub11C rcctulrecl by t11Ls sectfon may be given by the State on behalf of the suppller of water. (g) In 1ny 1nstlnce in which nott(lca- tlott by mall 1s rCqulred UY p1rapr:tlafl (1) of thts sect{on but notiflcal•iait by iicµ's- papcr or to radlo or t~1cvL5ion statiniis Ls nnt required Uy paragrlph lb1 of thi.S section, thc Statc may oidcr thc supplicr of water to providc nutification by news- plpcr nnd to radio and telcvi5ion stations when circumstances malce tnore immedi- ate or broader notice appropriate to protect thc public hcallh. § 1,11.33 Jiccortl maintenanec. Aity owiler or otiacrit.ar of a I>uullc tvater systeni subjcct Lo 11iC provisioiLS of GPO 999-200 + ~r 1 i ) r LAW OFFlGES DEJ LWO, RUDOLF & SCHROEUER,1'. S. 1016 4LD NATIONAL BANK BUIIDING ROBERT D. DELLWO KERMIT M. RUDOLF SPOKANE, WASHINGTON 99201 RICHARD J. SCHROEDER (sos) 624-4291 TERRY W. MARTIN TERRY T. GRANT HEDLEY W. GREENE ROBERT J. ROBERTS December 14, 1977 Spokane County P1 ann i ng Comm i ssi on 811 N. Jefferson Spokane, Washington 99201 Dear Sir: This wi11 advise that the Northeast Quarter of Section 33, Township 25 North, Range 44 Except the East 30 feet of the North 1700 feet (platted as Midilome Addition) is included within the boundaries of Model Irrigation District No. 18 and will be furnished domestic water service by the district subject only to the conditions mentioned in this letter. An order was entered by the board of directors of the district on November 30, 1976 annexing all of said Midilome Addition to the district. Said order, however, contained specific provisions that only the first 72 lots (namely Lots to 19 in Block 1, Lots 1 to 30 in Block 2, Lots 1 to 4 in Block 3, lots 1 to 4 in Block 4, Lots l, 2 and 3 in Block 5, Lots 1 to 9 in Block 6, Lots 1 and 2 in Block 7 and Lot 1 in Block 8) would be entitled to water service until certain further determinations had been made. These further determinations include the location and working out arrange- ments for a wellsite within h9idilome Addition to be made part of the district's water distribution system, the location of a reservoir site, and a study of costs for providing the additional pumping and storage capaci ty needed for the remai n i ng 1 ots i n Mi di 1 ome Additi.on after the first 72 lots and the establishment by the district of a connection fee to be paid to the district for each of the remaining lots in Midilome Addition at the time of making connection to the district's system and actuaily receiving water service. The amount of said connection fee will be determined from the determination of costs for providing the additional pumping and storage capacity needed to serve the lots in Midilome Addition. . • Spokane County Planning Commission page 2 December 14, 1977 Studies now are in process to reach the determinations referred to above and subject only to such determinations being made the district will furnish domestic water service to the rema.ining lots in Midilome Addi tion. ; ' Yours respectful y KMR j b By : Kermi t M. Ru ol f Secretary Model Irrigatio District #18 cc Edgar Bueschke Robert Tomlinson Board of Directors Model Irrigation District a Spokane County Health District R E C E I V E DEC 161977 SPOKANE COUNTY PLANNING DEPARTMENT ~v~