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iii iiiiiiiuiiu iii <br />999 <br />MINED LAND RECLAMATION DIVISION <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />303 866-3567 <br />FA x: 303 832-8106 <br />STATE OF COLORADO <br />pF COO <br />~~~A <br />Ne~~,:MQ <br />+~ M n\ O <br />.Y ~J ~ ry+k <br />'h /a 16 <br />Roy Romer, <br />Governor <br />DATE: April 2, 1990 Fretl R. Banta, <br />Division Director <br />70: Cathy Begej, Jeff Clayton, and Carl tdount <br />FROM: Tim King <br />RE: Seneca II Annual Hydrology Report <br />On this data I reviewed the Annual Hydrology Report for the Seneca II Mine, <br />covering the 1989 water year. <br />Ground Water <br />After careful analysis of ground water parameters, on both short and long <br />lists, six parameters were exceeded consistently. In order of maximum to <br />minimum number of times exceeded, they were: <br />Total Dissolved Solids <br />Sulfide <br />Sul fate <br />Dissolved Manganese <br />Total Suspended Solids <br />Dissolved Iron <br />The frequency of monitoring appears in compliance. Generally, the ground <br />water wells are to be monitored for water levels five times per year, and for <br />water quality two times per year. This standard appears to have been <br />maintained except for the following wells: GW-S59-S, GW-S60-S, GW-S63-S, <br />GW-S64-S, and GW-S65-S. Only GW-S65-S shows a dry well. <br />Surface Water <br />As with ground water, the same six parameters were exceeded consistently, <br />although the order of maximum to minimum was different. They were: <br />Total Dissolved Solids <br />Sulfide <br />Sulfate <br />Dissolved Iron <br />Dissolved Manganese <br />Total Suspended Solids <br />The frequency of monitoring appears in compliance. Generally, field <br />parameters are taken monthly and water quality is taken three times per year. <br />This standard appears to have been maintained. <br />/ern <br />5674E <br />