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li ~ IVL~+~f/ <br />Twentymile Coal Company <br />29515 Routt County Road # 27 <br />Oak Creek, Colorado 80467 <br />(970)579-3800 <br />July 26, 2007 <br />Ms. Tania Watson <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division -Permits and Enforcement <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />Phone: (303)692.3603 <br />RE: PERMIT CO-0036684: 2ND QUARTER 2007 DMR SUBMITTAL <br />Dear Mr. Nalepa: <br />RECEIVED <br />JUL 3 0 2007 <br />Division ofa d Safety n <br />Mining <br />Please find enclosed the above referenced discharge monitoring reports for the period from April 1, 2007 through June 30, <br />2007. No permit limitation exceedences were noted during the quarter. <br />A Quarterly Whole Effluent Toxicity (WET) test was conducted for Outfall 001W in April 2007. This site passed for both P. <br />Promelas, and C. Dubia. Copies of the W ET Test Report Forms are included with this submittal. <br />Please contact me directly at (970) 870-2750 for any further questions or additional information. <br />Bdan A. Watterson, R.G. <br />Geologist, Environmental Group <br />Twentymile Coal Company, <br />Enclosures <br />cc: DMG <br />CW PS Permit No. CO-0036684 file <br />