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COLORADO DEPARTb1ENT OF N£ALTH, Water Quality Control Division <br />Rnriormle - Pnge 12, Permir No. CO-0032633 <br />3J Clrrwric wET Limitmions.• The potential jor toxiciry in coal mine drainage and spoils springs is <br />demorrsn'nred 6y a growing Division database ojWET test failures jor such dischm'ges. On this basis, ns <br />required under section 6.9.2(5) of the Re2ulntion.c for the Srnre Di.cchnree Permir Sysrem, the Division <br />believes there is reasonable potential jor the discharges fi•onr at jells 002, 003, 004 and 006 to interfere <br />_ with attainment of npplicn6le u•nter quality classifications or stmtdnrds. Because of this conditiom, the <br />chronic limimtion hru been incorporated into the permit and wilt become effective on Januory 1, 1997. <br />Prior m the chronic lirnitnrion becoming effective, the pernittee is required to conduct routine monitoring. <br />The results of the testing are 10 6e reported on Division approved jonns. <br />77te permirree will be required to conduct rn•o apes of statistical derivnrioru on the darn, one laokhrg for <br />any srntisricaily significmu difference in toxiciry between the control and the efJ7uent concentrations mrd the <br />second iderrtifving the IC13, should one exist. Bath sets ojcalculntioTts ++•ill look nt the jell range ojraxiciry <br />(lethality, growth nmd reproduction). !ja level of chronic toxiciry occurs, such that dtere is n statistically <br />significant dif]erence in the lethality (nt dre 95% cot fdence level) between the cmrtrol and any ejJluenr <br />concentration less than or equal to the /rurrenm Waste Concentration (/LVCJ and if tJre ledmliry lC=s < the <br />IWC, the permirree x•ilf 6e required to follow the nwomnric compliance schedule identified in Par /.B njthe <br />permit, if die observed toriciry is due to orgnnisrn lethnliry. Once the chronic lethnliry limitation becarres <br />effective, only crceedmrce of The limitation specified in Part 1.A. 2. will trigger the requirement for <br />conducting the automatic conrplimrce schedule ident fed in Pnr /. 8. ojthe permit. Prior fo and nfier the <br />limitation becomes effective, if the Toxicity it due to differences in dre growth ojthe jmhead minnows or dre <br />reproduction of the Ceriodnphnin, no inmredime action ors the purl of the permirree will be required. <br />No++ever, this hrcirlenr, along widT other WET darn, rvi(1 he evaluated by rlre Divisimr and may ja-m the <br />basis jor reopening the permit mrd including additional R'ET limits or other requirements. <br />4J General /nfnrmnrinn: Tl+e permirree should rend the 6VE'T resting sectioru of Part /. A. and /. B. ojthe <br />permit cnrefidly. The permit audines the rest requirements mrd the required follow-up actions the perurirree <br />must mke to resolve n mziciry incident. The penninee should rend, along +vith the rlocumenrs listed in Pnrr <br />LB ojrhe permit, the Colorndn Rrmer Ounlity Camml Division Biommritarine Cuidmrce Documem. dNed <br />July 1, 1993. TJvis docurnenr outlines the criteria used by the Division in such areas ns granting reliejfi~om <br />LVET IesNng, mod f,•ing test merborls nrrd changing test species. The peruitlee should be mvnre the! sonic rj <br />the conditions outlined above may be subject to change ijthe jnciliry experiences a chnrrge in discharge, n.r <br />outlmed in Part /L A.1 of the pernrir. Sudr chmtges shall 6e reported to the Division inunedintely. <br />4. Srornr+vnrer: Active nud irmcri ve cool mining opernrio»s where sktrrrnrntcr comes iota contact +rith overburden, raw <br />material, iruermedinre products, hvprorhrcr.c, finished products or +vnste prorlucrs located nt the mining sire mr <br />included in category (;dJ of d,e federal .ctornwnter regulations. Such facilities me required to hm~e applied jm' rr <br />permit to rlisehrrrge slornnvarer associated +virh mining ncri vine on or before Orrober !, 1992. Pittsburg mrrl <br />Afid.rrTY Con[ Alining Co. s« bmirrerl un npplicndnn jor n general permit fur stornnvnrer dischm'gcs for the Ednn <br />Aline ar November 3, /993. This fncilirr's certificnrion under dre general pernrir become effective on Norernher 16, <br />1993. The Erbia Miue cerificarion number is COR-040147. Tlris jnciliry is ulco cu vererl under fcdern7 group <br />npplicrniar number 166-052.1. <br />Since the requirements for stornarnter permits hove just recently berome effective, dre Division's polity is to cover <br />ns menu Jisilities as passible that are inchrded in the regulations, with general permits. Forjnci(iries thm also bore <br />individual CDPS permits jor discharge uj process wmer, mrv npplicn6le starntrater provisions would lien be <br />included in indi vidunl CDPS permits ru the rime of inrlr+•idun! perndt renewal. 77re current renewal of the Ednu <br />Aline CDPS pennir (Nu. CO-003263SJ rvi(1 contain sroa~rmvnter provisions. ltgren this renewal becomes cfjecrire, <br />cerrificnrion COR-040(47 will he inncrivmed. Under the terms oldie combined individual permit (CO-003263SJ, <br />Piraburg nud Midway Conl A9irring Co. +vi(I he muhorized ro discharge sroruncnrer acsocinrcrl w6h indusn~inl <br />ncrivuy inro u~nters of the Srnre ojColorado. <br />77ie renn.c and comliriars nJdris pernrir, n.c relined m stornnvnrer discharges, inchrde.• <br />