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MOUNTAIN COAL <br />COMPANYL.L.C. <br />A Subs ir of A _ i -stem E sous Group, LLC <br />July 24, 2012 <br />Ms. Kelly Morgan <br />Compliance Monitoring and Data Management Unit <br />Colorado Department of Public Health and the Environment <br />Water Quality Control Division (WQCD) P -B2 <br />4300 Cherry Creek Drive South <br />Denver, CO 80246 -1530 <br />Re: Mountain Coal Company, LLC - West Elk Mine <br />CDPS Permit No. CO- 0038776 <br />Discharge Monitoring Reports — Second Quarter 2012 <br />Dear Ms. Morgan: <br />West Elk M€fie <br />", 59" <br />u 74kig[ y , <br />Sor-wr5Ut. GO 81434 <br />{370)929 -2200 <br />r (910) 929 -5050 <br />Attached are Mountain Coal Company, LLC's (MCC) Discharge Monitoring Reports (DMRs) for the <br />second quarter of 2012. There were no exceedances during this reporting period. <br />Please note, during the discharge of Outfall 004, the Whole Effluent Toxicity (WET) sample that was <br />taken on June 14 arrived at the lab above the maximum temperature for this analysis. The discharge <br />was resampled on June 18` and arrived at the lab within the acceptable parameters for the WET analysis. <br />The results of this analysis are attached to the DMR for Outfall 004. <br />Should you or your staff have questions or need additional information concerning MCC's DMRs, please <br />contact me at (970) 929 -2238. <br />Sincerely, <br />Kathleen G. Welt <br />Environmental Engineer III <br />Enclosures: NPDES Forms (DMRs) Second Quarter 2012. <br />cc: W. Norris <br />J. Stark - CDRMS <br />Availability of Records File - NPDES <br />