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Greystont Bevtlopment Consultants, Inc. <br /> A hydrologic monitoring program was implemented at the Somerset Mine located near Somerset, <br /> Colorado in January 1986. This report includes data collected for the Second Quarter on June 26, 1999. <br /> Stations which were monitored include Wells B-6 and H-10 and the Hubbard Creek Surface Station H-1. <br /> All data collected during this sampling is presented on the attached data base tables containing all data since <br /> the program began. <br /> All water chemistry analyses results conducted by Chemtech of Salt Lake City,Utah for the quarter <br /> are attached. At Well H-10, water level increased by 2.75 feet from that measured in April 1989. Water <br /> quality remained consistent with previous samplings. The water can be classified as a strong sodium- <br /> bicarbonate type with elevated concentrations of dissolved solids, alkalinity, and conductivity. The <br /> cation/anion balance also indicated a highly mineralized water. Metal concentrations of boron, fluoride, <br /> total iron and dissolved silica were also evaluated. The water was slightly turbid. <br /> The water level at Well B-6 rose 5.4 feet from the level measured in April 1989. Water quality <br /> remained consistent with that of previous sampling and resembles that sampled at Well H-10. The water <br /> is a sodium-bicarbonate type, with a higher ionization than that measured at Well H-10. This is also <br /> reflected by a higher TDS and conductivity. This surge in the water level at B-6 and a rise in water level <br /> at H-10 along with the change in water chemistry indicates further connection between these two mined <br /> areas. Future analyses may confirm this assumption. <br /> Water flowing in Hubbard Creek (Station H-1) was low (3.17 cis) indicating below normal runoff <br /> conditions for this time of year. The water is a calcium-bicarbonate type with average concentrations of <br /> nutrients. Metal concentrations were found to be within normal ranges of these previously sampled. <br /> A sediment pond inspection was conducted on May 26, 1989. All ponds were found to be in good <br /> operating condition. No discharges were made from any of the sedimentation ponds during the quarter. <br /> Copies of the NPDES Discharge Monitoring Reports submitted to the Department of Health have been <br /> forwarded to the Division. <br />