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Mountain Coal Company <br />West Elk Mine <br />Post Oftice Box 591 <br />Somerset, Colorado 87434 <br />Telephone 303 9245015 <br />July 23, 1992 <br />COLORADO DEPARTMENT OF HEALTH <br />Water Quality Control Division <br />Permits and Enforcement Section <br />4210 East 11th Avenue <br />Denver, CO 50220 <br />Re: NPDFS Permit (No. CO-003877 <br />To Whom It Concerns: <br />III IIIIIIIIIIIII III <br />999_ _ <br />1qF \/ <br />J ~~j~~f <br />!1(219 c.~ <br />M/NER~~S~ ~~oC 9z <br />GG 4. <br />Please find enclosed Mountain Coal Company, West Elk Mine's 2nd Quarter, <br />1992 Discharge Monitoring Reports for the above referenced NPDES Permit. <br />Discharge point 002 was sampled and a W.E.T. analyses completed. Toxicity <br />was measured to both test species. Accelerated testing was then performed to <br />determine whether a persistent toxicity was present. Accelerated testing <br />showed that the earlier toxicity was intermittent and probably resulted from a <br />transient event. Results of this analyses are attached to the discharge point 002 <br />report. <br />Should you have any questions or need additional information concerning these <br />reports, please do not hesitate to contact me. <br />Sincerely, <br />C~G7J~u't~u rJ ~T <br />Bonita K. Short <br />Environmental Coordinator <br />Attachments <br />xc: U.S. EPA -Denver <br />C. Johnston -MLR <br />etcsim~, <br />RMCOL2W <br />