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~ea18~9•s~ee <br />• <br />Boo~o~~~~~ <br />COMMERCIAL LABORATORIES <br />A DIVISION OF ACZ INC. <br />1]/ LINCOLN AVE. <br />P o. Box Tnwl <br />STEAMBOAT SPRINGS. CO WLI) <br />FCC ,~ ~ I... <br />,J <br /> <br />Mr. Craig Springer <br />Bear Coal Company <br />Somerset, CO 81434 <br />Dear Craig; <br />February 13, 1984 R~GEI V GJ <br />I~!INED lAM9 RECr?.M?t;p~ rlvlslr?~t <br />Colo. Dip[. of Na?ur;l F-ie~~~y, <br />As you requested, I have compiled your analytical data for your past <br />five quarterly water samples from sites AAI, AAII, and AAIII. <br />After reviewing the data, I found several problems. The first problem <br />was the dissolved solids results for the three samples tested on <br />10/31/83 appeared to be low. I rechecked the raw data for this test <br />and found the dissolved .solids were mis-calculated. The corrected <br />values are included in the charts. The second problem concerned the <br />labeling of the samples. A sample labeled ~1 dated 2/28/83 has <br />analytical data that does not correlate with the other AAI samples. <br />The data from this sample is more in-line with the AAIII samples. We <br />placed this data with the AAIII samples and assumed that no AAI sample <br />was taken on 2/28/83 since we received only two samples. <br />Over all, the analytical data was fairly consistent between quarters <br />and was of acceptable ground water quality except for several <br />parameters which had high, unacceptable concentrations for ground <br />water. Those parameters include aluminum, copper, iron and lead. The <br />reason for the high concentration for these parameters is that the <br />parameters are total recoverable and not dissolved which is normally <br />associated with ground water. Total recoverable metal concentrations <br />will be higher than dissolved metal concentrations. The total <br />recoverable concentration includes both dissolved metal and metal that <br />is adsorbed to the surface of the soil particles in the water. The <br />adsorbed metal goes into solution when nitric acid is added to the <br />sample. Samples from AAI, AAfI, and AAIII have consistantly had a <br />high suspended solids which is probably the reason for the high metal <br />concentration. <br /> <br />