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COLORADO DEPARTMENT OF PUBLJC Hl3ALTN AND ENVIRONMENT, Wnrer Qunliry Control Division <br />Rationale - Pn,ge 13, Permit No. CO-003877(1 <br />The permirree should rend, along with the documents listed in Pnrr l.B of the permit, the Colorndo Wmcr <br />Quality Control Division Biomonhorinp Guidance Document, dated July I, 1993. This doctrmenr omline.c <br />the niteria used by the .Division in such areas as granting relief from WET testing, modifying test methoda <br />and changing test species. The permirtee should be aware that some of the conditions outlined nbore rnny <br />be subject to change if the faciliry experiences a change in discharge, ns outlined in Pnrr //. A.1 of the <br />permit. Such changes s.4all be reported ro the Division immediately. <br />6J Ourfnlls 005. 006. 007. 008 and 009: Because oj+he inrermirret+t nature of surface runoff, t'Ite fact that <br />discharges occur during high flow periods and the expected lack of taxiciry from this source, WET resting i.v <br />not n requirement for autfnlls 005, 006, 008 nrui 009 ojthis permit. Additionally because the etJlnenr from <br />outja!! 007 is strictly domestic in nature and does oat go directly ro state waters, WET testing is »ot a <br />requirement for this ougall either. The Division reserves the right to reopen the pernrir ro include WET <br />recring, should faciliry rondiriorrs change or if new information becomes nvnilnble. <br />4. stormwnter.• Active mul inactive coal mining operations where starmwarer comes iruo contact with overburden, rmv <br />mmerinl, intermediate products, byproducts, finished products or waste products located nr the mini.~rg sire are <br />included in category (iii) oj+he,(ederal stormwnter regulations. Such jncilities are required to hnve• applied jar rr <br />permit to discharge stormwarer associated with mining ncriviry an or before October 1, 7992. Mourrtnirr Coal Cu. <br />.submitted nn npplicnrion for a general permit for stormwarer discharges for the Wesr Elk Mine an August 27, 1992. <br />This facility's cenificntiorr under the general permit become effective on October 14, 1992. The Wesr Elk Mine <br />cerrifirnrinn nwnber i.r COR-040001. <br />Since the requirements for .vormwnrer permits hove just recently become effective, the Division's police is m cover <br />ns marry facilities ns possible rhrrt are included in the regulations, with genera! permits. For jnciliries that also Itav~• <br />individual CDPS permits for discharge of process water, any applicable stormwnter provisions would then be <br />included in irulividunl CDPS permits at the time ojindividual permit renewal. The current renews! ojthe West Elk <br />Mine CDPS permit (No. CO-00_t8776) will contain stormwnter provisions. When this renews! becomes effective, <br />cert~cnrion COR-040001 will b.^ inactivated. Under the terms of the combined individual permit (CO-0038776), <br />Mountain Coal Co. will be auth.arized fo discharge stornrwarer associated with indusrrinl ncrivirv tarn w~nrers ojtlse <br />Srnre of Colorndo. <br />The terms aul conditions of chic permit, ac related to stormwnter discharges, include.• <br />n. Seereenrion o(Srnrmwnrer Dicchnrres: All discharges covered 6y the stormwnter portion ojthis perrnir shall be <br />conrpoced emirely of.rrormwnrer (except ac discussed m LE.2.b.9 ojthe permit). stormwnter which mixes with <br />process N•arer is subject to process wnrer controls. Dicchnrges from sources other rhnn srornnrmer nru.rt he <br />addressed by the process wnrer controls in this CDPS permit. <br />h. stormwnter Mnnngemenr Plena (SWMPsI: The purpose of a SWMP is ro idem fi~ possible polluram .sources rhnn <br />may contaminate srornrwnrer mul ro set om 6est mnnngemenr pmcrices that, when inrplemenred, will reduce ur <br />eliminate any possible wnrer quality impacts. <br />A SWMP hat been developed for the West Elk Mine in nccordnnce with good engineering prnnires. The plan <br />identifier poreminl sources or pollwion which may reasonably 6e expened ro affect the quallry of srorm wnrer <br />discharges acsocinred with indusrrinl ncriviry. In nddhion, the plan describes anti ensures the iurplemenmrinn r f <br />practices which are ro be used to reduce the pollurnnrs in storm wnrer discharges nssocimed with indusn~ial <br />ncrivirv m the faciliry, anti assures compliance with the terms anti condirion.c ojthis permit. Mountain Conl Cu. <br />must implement the provisions ojthe SWMP ns a condition of this permit. Conrems anti requiren+em.c of the <br />SWMP are discussed in the permit at Part /.E.l.b. <br />c Compliance Dntes.• Maumnin Conl Co. has stored that they hove irnplememed the West Elk Mine SWMP anti <br />are in rompliance with ir. C'enificntion that this was done was received by the Division ort December 20, 1993. <br />The SWMP shall he updated ac npproprime. <br />d. Cmm~rehensine Fncilirv Insoection.c: The permittee will be required to make n thorough inspection rjrheir <br />.vormwnter mnnngemenr .system, m (en.cr twice per year (in the spring anti fall). These inspections nnrs~r hr <br />dorurrremed anti .cummnrizerl in the nnuunl report. (See Purl /.E1.f of the pernrir.J <br />