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DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman 51., Room 215 <br />Denver, Colorado 80203 <br />Phone: (3031 866-3567 <br />FA%:13031832-8106 <br />STP~TE OF COLORADO <br />DEPARTMENT OF <br />Date: February 6, 1995 NATURAL <br />RESOURCES <br />To: Tony Waldron ~ <br />Roy Romer <br />Governor <br />From: Kent Gotha (amen S Eochhearl <br />Executive Director <br />CC: David Berry Michael B. Long <br />Division Direcor <br />RE: 1993 and 1994 Annual Hydrology Reports, Somerset Mine, ~`C-81- <br />022 <br />As per your request, I reviewed the above-mentioned reports for the <br />Somerset Mine and have the following comments or questions. <br />General Comments <br />The operator should include a discussion of the results of <br />monitoring and how it supports or contradicts the probable <br />hydrologic consequences section of the permit. Currently, the <br />operator is only re-iterating the data collected for the year. <br />Apparently the changes in the monitoring program have made it <br />easier for the operator to comply with the approved plan as there <br />appears to be a marked improvement in compliance from 1993 to 1994. <br />Please have the operator explain the following ommissions. <br />1993 Annual Hvdroloav RePOrt <br />Monitorina Freauenc <br />1. The following surface sites were not visited in May: C-1,U- <br />1,HN-1,S-1,S-2,NF-1,NF-2. <br />2. The November sample for site H-1 is missing metal values <br />except iron. <br />3. The 4th quarter sample at site NF-1 is missing metals, TDS, <br />and alkalinity. <br />4. Groundwater well SC-1 is missing visits in May, July, and <br />September and is missing a 4th quarter full suite sample. <br />5. Well SC-2 is missing all SAR values and missing a 4th quarter <br />sample. <br />