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MOUNTAIN COAL <br />COMPANYL.L.G_ <br />4 adxidia: } of krch WeFtnr i Rturrunar= Crcirp l LC <br />April 23, 2012 <br />Ms. Kelly Morgan <br />Compliance Monitoring and Data Management Unit <br />Water Quality Control Division (WQCD) P -B2 <br />Colorado Department of Public Health and the Environment <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 — First Quarter 2012 <br />Dear Ms. Morgan: <br />West Erik Mine <br />P.O. Sax 591 <br />5174 Highway 133 <br />5omeml, GO 81434 <br />{970�929 -5015 <br />Fax (970) 929 -5050 <br />Attached are Mountain Coal Company's (MCC's) Discharge Monitoring Reports (DMRs) for the First <br />Quarter of 2012. No water discharge limits were exceeded during this reporting period. <br />As per our discussions last month, the wastewater sample that was collected from Discharge Number <br />007A on March 14, 2012, and analyzed on March 15, 2012, by ACZ Laboratories, for fecal coliform in <br />wastewater, was analyzed at dilutions of 0.1 mt, 1 m1' and 25 mts. The 0.1 m1' and 1 mt samples were <br />clean, but unfortunately the 25 m? sample was TNTC (too numerous to count or greater than 60 colonies <br />per 100 mt, per ACZ Laboratories' Standard Operating Procedures). The lab should have performed <br />numerous dilutions between l ml? and 25 m$s but unfortunately they did not. Therefore, the TNTC <br />analytical result for fecal coliform was eliminated in the 7 -day Average or Daily Maximum, and 30 -Day <br />Average calculations. Another sample from the same Discharge Point was collected on March 27, 2012, <br />and analyzed on March 28, 2012, and the analytical results showed 80 colonies /100 ml of fecal coliform <br />which is well within our permit requirements. <br />Should you or your staff have questions or need further information concerning MCC's DMR's, please <br />feel free to contact me at (970) 929 -2308. <br />Sincerely, <br />Robin J. Schiro, P.E. <br />Environmental Engineer <br />Enclosures: Completed NPDES Forms (DMRs) First Quarter 2012 <br />cc: W. Norris <br />J. Stark - CDRMS <br />Availability of Records File - NPDES <br />