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CULOR.IUO UEP;IRlalFh't'OFFFE~ ~ .. _. ..-. :... ,. ... ~. .- ~.;:..... . .. .. ..... . ..... ~~., ::....... <br />d TR, Mmer Qantin• Control Urrision ~ ~ -' ' <br />Rtrrrnnnte • Page t S. Permit No. CO-OOY364S - - <br />11505 Conlpliarce with Limits-tYletctlr 1.A.3. Fef»•trary 1, 2006 <br />Christopher L. Gates <br />August 14. 1003 <br />VII. - REFERENCES <br />A. Colorado Dcparnuerrt ojPtrblic NeaJtlr mrd Environment, Hater QurtlitY Control Conanission. Regtdation No. 31 The Basic <br />Standards mul AlethaloloAies fvr Surface Water (5 CCR 1001,-31). Detrvrr. CDPK$ as revised 01/13/01 ant! ef)ectil•e 0-0/t 0;'0 %. <br />B. Colorado Department ojPeeblic Health and Ettt•iraunetrt, {{'iuerQrudihr Control Conunissiorr. Rcbrrrlrrtion Nu. 63 Rekulatiou.,Ln• <br />E- j~lrte~t! Limiuitinns (5 CCR !0111-6?J. Dem•er: CDPFfE, ns reviser(!!/9/48 and r ff dive 13/30/98. <br />C. Colorado Department of Prrhlic Health arrd Emdrnnrrrertt, {Valet Quality Corrlrol Conunissimt. Regtdation Nn. (1 C•olur~ulg <br />Disclurrte Permit System Rerulutlons. (5 CCR 1110?-61/. Dearer. CDY11E, as rerisrd J/8/0] and eJjecttve 3/'/01. <br />D. CI.S. Gnvermuent, OfTce nJ'rhe Federal Reg(ster, Nrrtinnuf Archives uml Records Adurir:isu•ation. Cr!!lc ~ j FrdeL~~r! Rc~;u(<rtiuus <br />(Port •1J~, {t'achingtmr: !94(2. <br />E.. Chadwick Ee•olugical Consuhmns, hu•.. 1995. Use.attainabilirvAunlt'sis ForAreryua Gulch. Squax Gulcle. and Cripple ('reek. <br />Teller Comrh•. Colorado. <br />(' Chad,ick Eco(vgicnl ('onsuluuas. fnc.. 3002. Supplemental Use Atminrtbilirv Auah:ws For Arequa Gulch. Teller Cuunti•, <br />Colorado. With Lnrphusis on p1f E/)eels urr the 9tucrubnrrtehrale Caunuurih•. <br />1.111. PUBf.1C r~'OT1CE COM:LIENTS <br />rl i•iaen comments were rec•aive•d franc US. Envirnrt»rc•nea! Prorrcrinrr dgerrct• (Region V!I//; The Sierra Chd~. A/inernl Polirv Center: arrd <br />C'iti:eas_(nr Vic7or! /Grnupctl under "conservation nrgarri.atious •): ant/thepermirtee. Tlrc• Divi.rinrr wi/tprotvde copies ufa/t du• rrritren <br />ronnucnts, rrpnu ,rritterr request. Topkzrl strmnruries r f the c•nnrnrerrts mid dye respausccs oJ•tlre Dlrisian tree prrnided he•Inu. <br />C'_S. h.'rti•irormrcirta! Proterlion Agenc~•~F,P~ <br />I Corrrrnent ! <br />Respoltce l <br />~ Connnent: <br />Recpnn.rc 1 <br />EPA helieyec that the slate shordJ ry-c~•ahrate n BPJ terhnolo3h• approachJin• Outfit/1 t1(IIA sinr•c the efJlueru is uu Larger <br />srrhjcct ro F;1]luc>nt Linrit Ciuidc•lines (ELG.r/ for ucid.miue drainage. but orgy cnnt«in the saner pnllrrturus and <br />ahurneteristics as rnirre drainage, , <br />The Dhasinn r/idre-evaluate this erpprnath acrdr/eckled rlrrrt BPJ limits rrardd not be applied with theerception oJlinriL+' <br />feu urtal suspended solirlc, based art sereraf c•rinsideratimrs: il'QBELs jar cropper, ~irrc. amt c'urlnritn)r rir•e less than the <br />F.LGs «rul protective oJ•the C:LGs. 1tilvnitriring dater front Outf[dl 06lr1 rtocrnnent that !earl End nrcrcYrry c•orrccrrn-ation.+ <br />ore ltpically at or helnw the prcvirnn atalytical detection limits and 1(inits• fir there priraaeters are qnt arr•essur~. <br />rtfuriitorirrg data from Ourfirl1001A support the cotic/trsinrr that the ELG of3(1 mgll feu TSS crrrr be ntueined uitlr little or <br />nu ecwronric hurdsldp. This iefto•tlrer.rupparrerl in the previurrr per•rnit xhere the limits x•ere 30 nrg/1 jar 30-rtaru,'eru~re <br />mot 30 nrg/I f<rr the daily inarimunr !(rniFcrtirm: The disclurrge tnorrituring rc•pnrn• stmrnrar}~ in Tahle VI sliau•.c urrh• one <br />etc'eedencenjthedrrilvnrarvalueuf30nrLv7. Thercfiue.thelinritatiurassetjorthiuthepreviouspenrriraf?0/30urt:'/r,ill <br />he set as limits baser! un BPJ in the neu• prattle. For pIL the Dirivinri has used BPJ in tlec•irling that irnpositlrm of a <br />minhnruu plf limit ut t/rc level the ELC is not npprnprititegiveu the /hct drat cmnpliancr with rend eryrriralerrt limit hcrscd <br />are the underlying hater ryaalih• staarlard is requiter! x'hctt rite temparsrq' a+orlificafinn to the standard. <br />EPA belic•r•es dent llreJacility has not demonstrated that tones ore uut disclurrgerl in tark• «mrnnus, hrrsed mr 1VET!{6'Jtrde <br />Ef/lucnt Toxicin) tes•tirrbr, acrd doer twit concur tyit6 dropping ii`ET testing jar the eJjlrreni in Outfa11001 A. hr udrlitinrr, <br />EPA helic'4c'S that {{'ET nrorrirorirrg is needed to evrduutc renronuble pore aria! jar instremn ercursiorts nhnve n narrative <br />nr numeric water-quality standard. <br />77re Dir%sion be/ieses dwt the facility has' demonstrated that the narrative standard is protected through the <br />inrpusition of numeric limits for t/re ptrranreterc of cor:cern as the Use Aturirmhi/in Assessment amt dye arsociared <br />recnlculntion demalstrae that these final standards ore protective nftlte arpuuic ttje dart cat 6e especred in ,dre•gtrr <br />Grrkh mul the TIE snrdy submitted to [!re Division identific•rl nlun+irrunr us being the only taric constituent. The souls <br />