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~~'^ V V V VCBNGINEEKING <br />61 I Skyline Road - Laramie,Wy 82070 - (307j 742-0031 <br />FAX (307) 721-2913 - E-mail: infolar@wwcengineering.com <br />November 14, 2002 <br />Mr. Tom Kaldenbach <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street <br />Room 215 <br />Denver, Colorado 80203-2273 <br />RE: Edna Mine, September 2002 CPDS and PTI Results <br />Deaz Mr. Kaldenbach: <br />CDPS Permit CO-0032638 <br />RECEIVE© <br />NOV 19 2002 <br />Division of Minerals & Geology <br />Enclosed are the Edna Mine's (Permit #CO-0032638) CPDS reporting results for the <br />above referenced monitoring period. During the month of September 2002, DMP 001 and DMP <br />004 did not discharge. DMP 007 did not exceed any compliance criteria in September 2002. <br />Third quarter WET monitoring at DMP 007 established a `'pattern of toxicity" to Daphnia <br />magna. Pittsburg and Midway Coal Mining Company (P & M Coal) initiated a Preliminary <br />Toxicity Identification (PTI) as directed in their discharge permit. As a result of the PTI, acute <br />toxicity is due to total dissolved solids (TDS), caused by calcium sulfate. <br />Please contact me at (307) 742-0031 with any questions or comments you have regarding <br />this matter. <br />Project Engineer <br />SL:gh <br />Enclosures <br />File: 99-144 <br />