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' 1' V V V CENGINEERING <br />January 21, 2013 <br />CDRMS Permit C- 1980 -001 <br />NPDES Permit CO- 0032638 <br />Rob Zuber <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street <br />Room 215 <br />Denver, Colorado 80203 -2273 <br />RE: Edna Mine, December 2012 DMR <br />Dear Rob: <br />611 Skyline Road - Laramie, WY 82070 - (307) 742 -0031 <br />FAX (307) 721 -2913 - E -mail infolar @wwcengineering.com <br />RECE sVT— <br />'JAN 25 2013 <br />Division of Reclamation, <br />Mining & Safety <br />Enclosed are NPDES/DMR results for the above referenced monitoring period at the Edna Mine. <br />DMP 004 and DMP 007 did not exceed any compliance criteria during the monitoring period, <br />including the Chronic Whole Effluent Toxicity (WET) Test for the Second Semi - Annual Event <br />of 2012. Baseline monitoring at MON 1 and MON 2 did not exceed any compliance criteria for <br />the Second Semi - Annual Event of 2012. Monitoring of MON 2 was performed on January 9, <br />2013. <br />Should the Colorado Division of Reclamation, Mining and Safety have any comments or <br />concerns regarding this submittal, please contact me at your convenience. <br />Sincerely, <br />Troy Summers <br />Project Manager <br />TNS <br />File: 2011 -180 <br />