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GCC GCC Energy, LLC <br />Post Office Box 2827 <br />Durango, CO 81302 <br />E n e r g y Telephone: 970.385.4528 4424 County Road 120 <br />"Safety as a Value" Facsimile: 970.385.4638 Hesperus, CO 81326 <br />July 14, 2009 <br />Mr. Tom Kaldenbach L ,14 2009 <br />Colorado Division of Reclamation, Mining and Safety Vrr4 e.n-; f <br />1313 Sherman Street, Room 215 Owl is of MeoLimation, <br />Mining and Safety <br />Denver, Colorado 80203 <br />Re: Technical Revision (TR-17) Application to Modify Groundwater Monitoring Program at <br />the King I Mine (CDMG File C-81-035) <br />Dear Mr. Kaldenbach: <br />GCC Energy, LLC is submitting a technical revision (TR-17) to the King I Mine permit to <br />suspend down-gradient bedrock monitoring until 2 years prior to a final bond release <br />application. Until such time, GCC Energy proposes to terminate groundwater monitoring <br />at the "Haugen Well" and remove this well from the groundwater monitoring program. <br />Based on our prior discussion and a review of the monitoring from the Haugen well (2000- <br />2007), it is our conclusion that there have been no effects to the water quality or water <br />quantity of the well from the King I Mine operations. Appended to this application are a <br />copy of the 2000-2007 monitoring results and graphic depictions of the values for well <br />temperature, well pH, well electrical conductivity, well total dissolved solids, and well <br />magnesium concentrations from 2000-2007. A brief synopsis of the results for these <br />parameters is provided below. <br />Water Temperature <br />Water temperature in the well fluctuates regularly with the seasons. Water temperature is <br />generally lowest during the winter months and highest during the late summer months, <br />though the temperatures respond to ambient weather conditions during the season. <br />pH <br />The pH for the well was slightly basic throughout the monitoring period, ranging from 7.82 <br />to 8.31. Two apparently anomalous readings took place during the monitoring, one in the <br />autumn of 2001 (8.54 value), and one in the summer of 2003 (9.22 value). pH values prior <br />to and after these reading remained within the observed ranges. No significant changes to <br />the pH values took place over the course of monitoring. <br />Electrical Conductivity (EC) <br />Over the eight year monitoring period, electrical conductivity (EC) values varied significantly <br />by season, with lowest EC values being observed in the winter months and highest readings <br />in the summer months. EC readings decreased for a period between the autumn of 2002