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GENERAL DESCRIPTION SITE-SPECIFIC LAND APPLICATION PLAN RYEGRASS SEPTAGE MANAGEMENT FACILITY KITTITAS COUNTY SOLID WASTE PROGRAMS 'I11e 1n1rpose <lf' this site specific land application plan is l<l address the requirements dclincd in \\'.-\C 17.1-.~08- :I 10(6) i'or the land applicaliun of'lh.: so:plagc solids and scplagc liquids colki.:lcd in Killitas Count~ 's Scptage Evapo1•ation Ponds (SEP) loc·atcd al the R~·cgrass L:mdlill. SEPTAGE QUALITY ·111e Ki11itas C:011111~· SEP Opcra1ing Plan (SEP Plan. January 1')95) rc,1uiro:s lhal lhe material cntcring lhc ponds he 11011-lrnza1dous .'11011-d,mgcn,us liquid ,,·ash:Wah:rs or slmlgo:. ·111.: mah:rial must he solid ,,aslcs that arc liquid or shulgcs ,·onlaining l'rce liquids as d.:line<l in \V,\C I 7J-.150-IOO and applio:ahle under W,\C 17.1-.150- 015 ( 11) (olher than liquid "asles "hose disdiargc or poh::nlial disd1,1rgc is r,·gul,110:d under li:daal. slate or Inc.ii water pollution permits). Sump and wash pad sludges rcquir.: laborntorv 1.:s1ing hv the haul.:r igen.:rnlor prior In 1-:illitas Cnunt, Solid \Vaslc's acccplancc of'lhe s,•ptage No hazanlous waste is accepted Toilet waslc eonstituks less than 25 pcn:cnl by volume ol'lh..: seplagc acceptcd at th.: ponds. L.1bo1alo1y t.:sl results will be submilled lo Killitas Count y Solid \Vasle and remain "valid for disposal" ror a p.:riod or llm:.: ~·cars. al which lime additio1rnl tests may bc required. Repor1s of all liquid wastes entering the SEP 11111st he suhmilled to Kiltit,L~ Count~· I lealth lkpartment on a 111onthly IHL~is . SITE LOCATION AND CHARACTERISTICS ·111e septage application sites arc lo.:at.:d on 640 acres al lhc Ry.:grass 1.andlill site. whi.:h includes a closed 25- acr.: landlill and operating J .imit.:d Puq1ose I .a ndlill. The sites an: lt1.:a1ed in Scdi,,n I Ci, 'fownship 17. Range 21. in the \'icinity of Hyc grnss . ,1p111·oxinrnt.:ly If! miks .::1st of Elknshurg lo the so uth of State Rout.: 10 (old Vantage llighwa~·). 'I11c sites arc in 1-:illitas Cnunt y Waler Resource lnvcntorv .·\rca No . .19 ,Uld arc owned cnlird~ by the County. lkl-.:r lo Figur..: I for lhc proje..:I nwp showing the sp.:.:ili.: appli.:alinn sit.:s mill means of a.:.:c8s to the fodlit y. ·111e SEP arc located as shown in l'igurl.! I and con8ists or two ponds. ·111.: dcsignal.:d s.:ptage apphcation sites ha1·..: a rolling terrain that generall~· slopes l'rmn ahoul J per.:cnt lo ahlllll IO pcr.:.:111. 'Ilic dim at.:-is arid: rainfall is less limn 8 inches per year. '111.: dinwk is d1ara.:kri1 . .:d hy dr~•- .:old wint.:1, and dry. hol su111111.:rs. Ground water is located sewral hundred foci below the site snrfa.:c: there is no a.:ti,·e surl,1.:e waler. Stllnnwater runoll: ii' any. Wllllld llllw nalllrally towards the r,l\'ines. The soil is primaril~ a .:ohbly lmun o\'er C1Jh1111bia RiYer hasalt 'Ilic soil is limited hy ils shallow depth (5 lo 20 i11ch.:s d.:.:p) and 1,ater holding 1.·apaci11· (0.5 to 2 i11d1..:s). S.:e Figur.: 2 for th..: Soil C'onsen·ation S.:rvk.: site 111.tp. ·111.: sil..:s ar..: li111itcd b~· th.: rel:uiwh· s1.:..:p slop.:s. and shallow so il depth aml wa1..:r holding .:.ipm:it~·. ·me sle.:p sl,>pe ;ind shallow wat.:r holding .:apa.:ity limit th.: silc h.:.::111se th.:~· i11.:r.:ase th.: risk o!' runoff and kad1ing. ·111e shall,m· <kpth or soil limits the sit<! by limiting the .:rop Yit!lds . ·111.: slop.: limitation will h.: owrcome by only apph-i11g scptagc lo areas thal ar.: slopt:ll al kss lha11 IO pcrc·.:111. 111 addition. a I OO-lc1ot hull'.:r will h.: s.:t ,11ol1ml th,· propi:1t~· site and hc11,ee11 the land applkalion m1d ;111y ..:phemeral stream cha11nels. \\dis llr springs. ·111.: buffer will abll hdp i:ounl..:1' lh.: im:r..::1sed ri~k ol' runoff :ind li:a..:hing du.: lo th.: ~hallow wut..:r holdini; capacity ·111, spei:ili.: appli.:alinn silcs that hav.: b.:en id.:nlili.:d have sullicienl soil to sustain \'.:gctalion Alsn. th.: addition ol' si:plagi: solid~ \\'ill add hulk to th, soil and ini:re,L~..: its d..:plh. '.':o :ippli.::nion will be allowed on ar.:as where lhc s.>il has h.:.:11 scrap.:d off for us.: in the lanr.Jlill. Professional Services Agreement (rev. 09/24/2018) Page 18 of 28