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<br /> <br /> West Elk Mine <br /> POBox591 <br />RE~~ <br /> l~ 1 5174 Highway 133 <br />IV~~ <br /> Somerset, CO 8!434 <br /> ~~~ 1 <br />P <br /> ax (970) 929SS9S <br />~ 1UU[ <br />MOUNtAIN COAL <br />~~ COMPANYL.L.C. <br />A Subsidiary of Arch Western Resources, LLC <br />October 16, 2002 <br />Division o/Minerals and Geology <br />Ms. Carla Lenkey <br />Colorado Department of Public Health and the Environment <br />Water Quality Control Division, Enforcement and Compliance Section <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />Re: Mountain Coal Company, LLC, (MCC), West Elk Mine, CDPS Permit No. CO-0038776, Letter <br />of Notification of Accelerated Testing for Biomonitoring of Outfa11017, for the 4th Quarter 2002. <br />Dear Ms. Lenkey: <br />Referencing my recent telephone conversation with you, October 15, 2002, MCC is conducting <br />accelerated testing of biomonitoring parameters for Outfall 017. According to our contract laboratory, the <br />Daphnia magna experienced an LC50 at 100% concentration of the effluent. The fathead minnows <br />Pimephales promelas alt survived in the 96-hour test. MCC will keep the Water Quality Control <br />Division informed as to the results of the accelerated testing. It has been our experience in the past that <br />we can expect a spontaneous disappearance of this anomaly. <br />If you have questions or need additional information concerning this letter, please contact me. <br />Sincerely, <br />enry Barbe -- <br />Enviro ental Engineer <br />cc: James Burnell - CDMG-OMLR <br />P. Schmidt <br />M. Havens P.E. - CDOPH&E - WQCD <br />