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COLOR:IDO DEF;IRT~bIEVT OF Ph'BLIC FIE.-ILTH,I,VD E:vvIRO:v,tlE.\'T, water rtrrdm Curttrul Dtvrsiun <br />liuaonule -:Intertdmeru No. 1. Pu;e ~, Perrrut No. CO-0(10(1221 <br />? LVnter Oun1iN Bused EjRuem Limitations .Ill sis oJrhe Herr ourjal/s dtscitarge !o .Sage Creek, Drv Creek or <br />• dteir tributaries. all of which ore triburnn ro the Yampa River. T3tese waters are nethirt segrnv~~t !2 cf tae <br />Yampa River sub-basin of the Upper Ca(nrntlo Rtver husut Ti~is szgmen! has rto rnetnls or aquatic Itfe <br />standarr/s other tknn pN. Sage Creek. Drv Cre~'k and tribtttnries !tare acute nrtd chronic low flows of Zero. <br />The mirtinaun distance from dtese outfrrlls ro dte Yampa River is ten miles. T]te Yampa River in the vtctniN has <br />a substanrinl /low that wotdd dilute any flaw from segment I?. On this basis. it is very tutfikeh~ that these <br />discharges could unpaU the Ynmpn River. Therefore, the Dtvtsian has determined that water yunhty based <br />e~uent linutntions (other than oN) are nor applicable for this nntendmenr. <br />3. Discussion of Effluent Lintitntions. <br />n) Regulations for EjLluent Limitations The Regulations Jor Effluent Limitaaons (~ CCR 1002-62) apply to the <br />conventronal pollutants. For these ourfalls, the limitations for Oil and Grease ore bused on tha regulation. <br />6) Applicable Federal Effluent Guidelines and Standards: The federal guidelines which apply to this Npe of <br />facility are found under 40 CFR 434, tided Conl rL/fining Point Sorvice Ef/luent Guidelines. The limi[ations <br />which apply are: <br />Table V/-3 -- Federal Standards (40 CFR 434) <br />Parameter Limitations <br />30 Day Avg Daily hlax. <br />pH, s. tr. (minimum -maximum) ---ri.0 - 9.0--- <br />Total Suspended Solids, mg/P* 35 70 <br />Torn( Iron, rag/0* <br />• BAT** 3. S 7.0 <br />NSPS* * * 3.0 6.0 <br />Seuteab(e Solids, mPlF'* NIA 0.5 <br />• 77rese parameters Subject to Burden of Proof Requ~remenrs, sre nest section <br />" Best A~aitahlr Technology -applies ro thosr fariliries already coru'rrucled <br />'•• New Source Performance Standards -applies ro those facilities constructed after St4/84 <br />Alternate Limitation Burden ojProof Requirements: !n corijorntnnce with 40 CFR 434.63, (he permittee hay <br />the burden of proof w/ten requesting reliejfrom total suspended solids (TSS), total iron and/or settleable <br />solids limitntiorts, as appropriate. 77te intertr of this regulation is to afford re(iejortly tivlien needed dtte to n <br />volume of water generated by a specific storm event, it is not intended to be automatically applied to all <br />discharges caused by precipitation, nor to be used to discharge volumes in excess of that generated by (he <br />storm event. On tlirs basis, relief shall be granted only when necessary and shell not be grunted when the <br />permittee lias control aver the discharge, enabling tItem ro meet the primary limitations. The permittee <br />should endeavor to meet the primary limitnrions whenever possible. Al( manual dewatering ojponds that <br />ore equipped tivirh ntrtontaric dewateritig systems must meet TSS andloral iron li»titarions. /ja pond has <br />only manual dewatering capability, relief is available only to rite extent required to regain necessary <br />stability and cnpaciN. The Division shall have final authority in determining tivltether reliejis granted. As <br />port of this determination, the Division shall evaluate whether the perntittee could hove controlled the <br />discharge in such n manner that prinmry limitnrions could !rove been met. <br />I) Fnr rnin(n11 ro waive TSS and mtal iron Iimtrarions, it is necessary ro demonstrate drat discharge <br />ocuured wirhui 43 hours after measurable precipitation has snipped. To waive settleable solids <br />limitnrions, it is necessary to prove that discharge ocuvred within 43 hours after precipunrion greater <br />than the 10-tear. 24~hour event hoc snipped. , <br /> <br />