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ACZ <br /> <br />At:Z Ine. • <br />E+WletNrlnq and F.ttvlrWlminLl S~rvtp~ <br />t~7s Pln~ Gn>N Roa0. Surttr tog <br />P.O.9or< note <br />swmeotl sptn0., Cowrado eo.n <br />~~ars~sseo <br />September !0, 1992 <br />Ma. Aaae Itlmfddt <br />Colorado Departmmc of Hnlth <br />Water Qualiq Control Diviao4 WQCD-PE-82 <br />4300 Chaq Creek Drive South <br />Deaver, Colorado 10212.1330 <br />Atuaaoa: Permiu and Eaforo:mmt Bettina <br /> <br />Ra Eumptioa From Toal Sttspeaded Solids (15S)) Limitaaoas, CDPS Permit No. COG <br />HS0021 <br />Dear lull. >blmfdda <br />This letter u is reponse to bout aodo>: of TSS vioiadoas a the Ens 111iae and (ollaws ttp oa <br />a prerious lace we seat to ~otr reprdieli this issue. Ia Tottr later dared Aulttst i, 1992, cols <br />indicted char T5S levels wen above esistio~ permit oondiriom for the period of Apn1 1 <br />throuelt June 30, 1992. Three outfall loatiom was reportedk~ in violation; 001(Poad D} 005 <br />(Food E} and 006 (Pond F} <br />Esrr responded to thin notifiatioa in a later addressed to Tat dated Au1au 2Q 1992. Bared <br />on our review of baseline data colleued at the mine atd sedimmr pond mainteaaaoe raor+ds, <br />we requested that ourreoc permit coetditioas for T55 be revised to account for oatnrall~ elesased <br />levels of TSS is era surface wuers: la addition. we roquatad that the ssmpliol poim for <br />Outfall 004 be atoved to elimimu aa~ effetxs of re~suspeasion on solids downpadimc of the <br />seditrlmt pow. <br />Mr. john Subic of the Colorado Department of Halth (CDI~ mnorsed Eerr oa Attpts 26, <br />1992 conoaninl our repoase later. He iadiared that Ear could request as esempdoa from <br />the TSS limitations provided that wre dowmmt that the ditchaete is violatim was nosed b7 <br />predpitatioa and were me within the control of the peemittee. To demoastrare the latter, Eery <br />would aced to confirm that the volume of runoff etro:eded the desips volume of the <br />sedimeandon ponds noel that the ponds had bem roudady daaed out m provide the <br />appropriaq sediment stors~e OpaGt7. The foUowiq paepapha pttotride the aeoarar7 <br />dotummtarioa to mPP~ aPPmtra! of a 155 liminsioa e:aooption for the Eerr Ilfiee. <br />As spedfied is the ctteteot faa'liq permit. all dischatfa from the mine outast entieel~ of <br />predpitasioa induced tnaoflr No mice or spoils water, plant operation water. dometic xwsie <br />or other wastswater other than surface runoff u disc6arted. Runoff from the mine i~l• <br />bepas in late March or aril Apn7 with the Darer of mawmdt. The heavier flows aonsr from <br />• March throullt Mss, whm the combiaatioa of mowmelt and raiabU Kidd perk runoff ern, <br />sometimes is etcest of 20 wbic &a per seroad (t>fr} In Jung runoff decsase rapidly to near <br />zero, and b~ mid-July, runoff ~eaer~ll~ oaurs oaF~ after summer chuadaycorms. 1a the period <br />from November through February, warn is ate draimles is ofrm frorm noel ao runoff Donor. <br />