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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />November 21, 2014 <br />Ray Lazuk <br />Climax Molybdenum Company <br />Highway 91, Fremont Pass <br />Climax, CO 80429 <br />Re: Request to Reduce Groundwater Monitoring Frequency, M 1977 -493 <br />Mr. Lazuk: <br />The Division of Reclamation, Mining and Safety has reviewed the Robinson Seep Investigation — 2014 Results <br />submitted by Climax to the Division on November 18, 2014. This submittal is the second part of a two year <br />groundwater characterization effort to develop a further understanding of the conditions between Robinson Lake and <br />Eagle Park Reservoir in addition to the effectiveness of the groundwater cutoff wall located between these two surface <br />water bodies. This groundwater investigation and the increase from quarterly to monthly groundwater monitoring <br />frequency in April of 2013 was triggered by an increasing trend in several analytes observed during the previously <br />approved groundwater monitoring plan. <br />The additional sampling and investigation indicate that the analytes in question have decreased from the levels <br />observed in late 2012 early 2013 prior to the investigation, and appear to pose no increased risk to the water quality of <br />Eagle Park Reservoir at this time. The Division concurs with the conclusions of the investigation, and as such <br />approves the request to return to a quarterly monitoring frequency and continuation of groundwater monitoring as <br />approved in the EPP Groundwater Monitoring Plan. <br />If you have any questions, please contact me. <br />Sincerely, <br />Eric C. Scott <br />Environmental Protection Specialist <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http: / /mining.state.co.us <br />John W. Hickentooper, Governor I Mike King, Executive Director I Virginia Brannon, Director <br />OF Cp�O <br />1876 <br />