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<br />STATE OF COLORADO <br />Roy Romer, Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />DAVID C. SNELTON, Dirotror <br />RECEIVED JUh~ 1 3 1997 <br />July 8, 1987 <br />Mr. Craig Springer <br />Bear Coal Company <br />P: 0: Box 518 <br />Somerset; Colorado 81434 <br />Dear Craig: <br />The Division understands Bear Coal Company's predicament regarding the use oP <br />an uncalibrated instrument to collect Bear Coal's quarterly water quality <br />data. Information obtained from uncalibrated instruments 1s unreliable and; <br />therefore; unuseable: <br />The data submitted by Bear Coal for the second quarter 1987 does not contain <br />data for well AA-3, Bear Coal Company is therefore, requested to obtain <br />three (3) water quality monitoring data sets from both AA-1 and AA-3 during <br />the remainder of 1987: Two of the data sets should be obtained during the <br />third quarter of 1987: The first data set should be obtained immediately <br />after receipt of the properly calibrated instrument by Bear Coal Company: The <br />last data set should be obtained during the last quarter of 1987: Bear Coal <br />must submit four complete sets of ground water field parameter data to comply <br />with the approved monitoring plan: <br />Bear Coal Company is also requested to investigate the integrity and viability <br />of well AA-1. Data collected from wel] AA-1 since July ; 7986 indicates that <br />the salinity of the ground water has increased significantly above background <br />levels. Electroconductivity (EC) values recorded for well AA-1 have <br />historically been 300 - 600 umhos/cm: Data recorded since July; 1986 <br />indicates the electroconductivity has increased to approximately 2500 <br />umhos/cm: Three of four recent electroconductivity values have exceeded 2200 <br />umhos/cm. <br />,~ <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. (303) 866-3567 <br />