Laserfiche WebLink
~ MOUNTAIN COAL <br />/~~~ COMPANVL.L.c. <br />A subsidiary of Arch Westav Resources, LLC <br />RECEIVED <br />West &]k Mine <br />P O Box 591 <br />5174 Highway 133 <br />Somerset, CO 81434 <br />(970)929-5015 <br />Fax (970)929-5595 <br />NOV 01 2005 <br />October 31, 2005 <br />Division ~f Minerals and Geology <br />Mr. Clyde Sharp <br />Colorado Department of Public Health and the Environment <br />Water Quality Control Division (WQCD), Enforcement and Compliance Section <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />Re: Mountain Coal Company, LLC (MCC), West Ells Mine, CDPS Permit No. CO-0038776, <br />Discharge Monitoring Reports for the Third Quarter 2005. <br />Deaz Mr. Sharp: <br />Attached aze the Discharge Monitoring Reports (DMRs) for the third quarter of 2005. Also attached <br />are the Bio-monitoring reports from the SeaCrest Group dated September 9th, 2005, for Outfa11017. <br />The dischazge from Outfall 017, aze experiencing high alkalinity values resulting in failure of the bio- <br />monitoring tests in Daphnia magna populations. The new NPDES (CDPS) Permit requires the effects <br />of the TDS be accounted for in subsequent testing. Accordingly, SeaCrest performed a series of tests <br />in conjunction with the original effluent, as par[ of the permit requirements to confum the effects of <br />TDS against other possible contaminants. The reports detail the results of the tests. The fathead <br />mim3ow, Pimephales promelas, populations were unaffected. Comprehensive analyses of the Ol7 <br />Discharge Point water show that the alkalinity is not masking some other source of toxicity. <br />MCC has established through the testing that alkalinity is the causative issue with the Daphnia magna <br />populations. MCC has hired Writght Water Engineers to investigate the options available for MCC to <br />either benefit from the mixing-zone guidance from the State or to conclude Bio-monitoring at the 017- <br />dischazge point. <br />Should you or your staff have questions or need additional information concerning these Discharge <br />Monitoring Reports, please contact me at (970) 929-2238. <br />Sin • ly, <br />enry ar e <br />Enviro ental Engineer <br />Enclosures; NPDES Forms (DMRs) for 3rd Quarter 2005 <br />cc: Tom Kaldenbach - CDMG <br />K. Fucik -SeaCrest Labs <br />J. Kelly -Wright Water Engineers <br />Availability of Records File -NPDES <br />