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AI MOUNTAIN(oAL <br />(OMPANYL.L.C. <br />A Subsidiary of Arcb Western Resources. LLC <br />West Elk Mine <br />P O Box 591 <br />5174 Highway 133 <br />Somerset, CO 81434 <br />(970) 929-5015 <br />Fax (970) 929-5595 <br />recoverable iron. The TSS exceedeces resulted from not checking this outfall according to <br />established procedures prior to discharge. Those responsible for collecting samples have been re- <br />instructed regarding sampling procedures at all outfalls locations. <br />The mine dewatering discharge has been shut-down since July 17?' to allow MCC to investigate and <br />better understand the reasons for the iron exceedances and potential corrective measures for Outfall <br />017. In addition, potential laboratory issues and/or interferences are being examined. <br />MCC will keep the WQCD apprised of its findings regarding the cause of the exceedances at Outfall <br />017 and corrective measures employed. Should you or your staff have questions or need additional <br />information concerning these Discharge Monitoring Reports, please contact me at (970) 929-2238. <br />Sinc ly, <br />enry B e <br />Environmental Engineer <br />Enclosures: NPDES Forms (DMRs) Second Quarter 2008, Wet Test Report - EnviroChem. <br />cc: D. Nolte <br />T. Kaldenbach - CDRMS <br />Availability of Records File - NPDES