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iii iiiiuiiniu iii <br />99 <br />STATE OF COLORADO <br />Roy Romer, Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />DAVID C. SHELTON, Director <br />August 5, 1987 <br />Mr. Bill Balaz <br />Manager of Regulatory Compliance <br />Kaiser Coal Corporation <br />102 South Tejon, Suite 800 <br />P.O. Box 2679 <br />Colorado Springs, CO 80901 <br />Re: Somerset Mine - Second Quarter Hydrologic Monitoring Report - <br />File No. C-81-022 <br />Dear Mr. Balaz: <br />I have reviewed the second quarter hydrologic monitoring report for the <br />Somerset Mine and have the following comments: No significant changes in <br />water quality were found for Surface Water Site H-1 from May to June. June <br />water levels and water chemistry at Monitoring Well H-10 has remained <br />consistent with that reported on May 19, 1987. The negative eH value of -125 <br />reported for Site H-10 indicates highly reduced conditions in the flooded mine <br />workings at Hubbard Creek. <br />Under extreme reducing conditions one would normally expect an increase in <br />solubility of heavy metals. A comparison between values reported for July 29, <br />1986 and June, 1987 indicates that concentrations of arsenic, cadmium, <br />chromium, magnesium, manganese and nickel have increased over time. Iron, <br />zinc, and various other metals have decreased in concentration over time. the <br />readability of the certificate of analysis submitted was not good. Please <br />ensure that future reports contain clear, readable information. <br />Thank you for your cooperation in submitting the 2nd quarter monitoring report. <br />Sincerely, <br /> <br />Thomas A. Schreiner <br />Reclamation Specialist <br />TAS/srs <br />cc: Susan Mowry <br />David Berry <br />1590E <br />423 Centennial Building, 1313 Sherman Street <br />Denver, Colorado 80203-2273 Tel. (303) 866-3567 <br />_~ - <br />> .. ,~ - <br />_. _.r.~~_-._w ...P_~.,.. __~ r~. rs~. ~~~ <br />