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r <br />4 <br />`TRAPPER MINEI <br />CERTIFIED <br />Colorado Department of Public Health and Environment <br />WQCD -PE -B2 <br />4300 Cherry Creek Dr. South <br />Denver, CO 80222 -1530 <br />GCR [WATER/DMR/Quarterly Letter /3rd Quarter 2012] <br />Enclosure <br />c Jared Ebert, CDRMS <br />File 109 2 7 <br />P.O. Box 187 <br />TRAPPER MINING INC. <br />October 18, 2012 <br />Subject: Third Quarter 2012 Colorado Wastewater Discharge Monitoring Reports <br />Permit No. CO -0032115 <br />Craig, Colorado 81626 (970) 824 -4401 <br />To whom it may concern: <br />Enclosed are Trapper Mine's Third Quarter 2012 Colorado Wastewater Discharge Monitoring Reports for the period <br />07/1/12- 09/30/12. During this quarter, three NPDES outfalls were active. Outfalls 002 discharged routinely <br />throughout the quarter. Outfall 001 and 020 discharged in early July intermittently in response to precipitation <br />events. Outfalls 005, 008, 009, 011, 012, 013, 014, 015, 016, 017, 018, 019, 021, 022, 023 and 024 did not <br />discharge during the quarter. Values reported on the enclosed DMRs represent the maximum (or minimum as <br />applicable) monthly /daily values generated at each outfall during the quarter. <br />No exceedances of primary effluent limitations occurred during this quarter. <br />Also enclosed are monthly NOAA weather summaries for the reporting period and WET test report forms as <br />applicable. One outfall was sampled for WET analyses during the quarter. Two species acute tests were completed <br />at outfall 020. No exceedances of WET test limitations were observed at the tested outfalls. <br />Trapper is required to maintain sediment levels in ponds at or below 60% of the pond volume. Outfalls 001, <br />structures #7R, #8, #10; 002, structure #5; and 017, structure #1 has exceeded 60% sediment levels. These <br />structures will be cleaned by the end of the calendar year. All structures operated properly and were not <br />compromised in any way. All other operations were properly conducted concerning the sediment control structures <br />at Trapper Mine. <br />Please contact me if you have any questions regarding the enclosed information, 970 - 826 -6143 <br />Sincerely, <br />Graham Roberts <br />EHS Specialist <br />