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000 <br />Twentymile Coal Company <br />29515 Routt County Road p 27 <br />Oak Croek, Colorado 80467 <br />(970)879.3800 <br />July 25, 2002 <br />Ms. Carla Lenkey <br />Colorado Department of Publle Health and Envlronmenl <br />tVater Ouahty Control Divtsbn -Permits and Enforcement <br />a30G Cherry Crcok Drive South <br />Denver, CO 8D1.7.2.1530 <br />RE: PERMIT CO.003.6680; 2ND QUARTER 2002 DMR StIE?MITTAL <br />Dear Ms. Lenkey <br />RECEIVED <br />t]ivts,pr of A(mcaals b CaNoOv <br />~u~ z s 2002 <br />Please find enclosed the above referenced discharge monitoring reports for lho penod from April 1.2002 through June 30, <br />20(12. Outlall 001 discharged during each week of Ow period. One permit cxcursbn was reported during this penod A toter <br />rewverabla (TR) iron concenOaLOn et 1.07 mgll was noted during Apnl phe permit 30 day average limit is 1.0), which ~s also <br />the maximum concentration detected for the quarter. No adddmnal samples were run this month, so the average Is based <br />upon a single sample. Note That rho quarterly average for TR iron was 0.72 mgfl. <br />A Quarterly Whole EHluent Toxicity M'ET) conducted in April indicated that the effluent was not acutely towc fo P. Pramelas or <br />C. Dubia. Copies o1 the CDPS WET Test Report Forms are attached. <br />Please cemaa m/o directly at (970) 870.2750 for any further questions or additional Information <br />Brian Watterson <br />Environmental Geologist <br />1'wentymilo Coal Company <br />Encbsures <br />cc: OMG <br />CWPS Permit Nd. CO-0038684 81e <br />