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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver <br />Colorado 80203 C O L O RA D O <br />, D I V IS I ON OF <br />Phone: (303) 866-3567 RECLAMATION <br />FAX: (303) 832-8106 MINING <br /> <br /> SAFETY <br /> Bill Ritter, Jr. <br />August 20, 2008 Governor <br /> Harris D. Sherman <br /> Executive Director <br />Brian Watterson <br /> Ronald W. Cattany <br />Twentymile Coal Company Division Director <br />Foidel Creek Mine Natural Resource Trustee <br />29515 Routt County Road No. 27 <br />Oak Creek, CO 80467 <br />RE: Second Quarter 2008 Discharge Monitoring Report, CO-0036684 <br />Dear Mr. Watterson: <br />Twentymile Coal Company (TCC) submitted NPDES Discharge Monitoring Report (DMR), for Second <br />Quarter 2008, Colorado Department of Public Health and Environment CDPS permit no. CO-0036684 on <br />July 30, 2008. Outfall 001A discharged each week of second quarter 2008. Water quality samples were <br />collected and analyzed and WET tests were conducted. No inorganic parameters were exceeded, however <br />the initial WET test, conducted May 20, 2008, resulted in acute toxicity to fathead minnow, but not to <br />Ceriodaphnia dubia . TCC conducted two follow up WET tests with fathead minnow, on June 10, 2008 <br />and June 18, 2008, on an accelerated testing schedule. The results from the two subsequent WET tests <br />were acceptable. <br />The report is in compliance with Rule 4.15.13(2)(iii). Thank you for prompt submittal of this report. <br />Sincerely, <br />4viro inns <br />ental Protection Specialist <br />C:/jhb/C82056/DMRS/2008/2nd Q 000036684.doc <br />CC: Dan Hernandez, DMG <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines