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• BASELINE GROUNDWATER QUALITY <br />As part of a hydrologic evaluation of the coal-waste disposal <br />and impoundment site, two shallow test bores were drilled in the <br />vicinity of the existing coal refuse pile. Both the test bore <br />located at the head of the hollow and the test bore at the toe <br />of the present dam encountered water. The drill holes were uti- <br />lized to recover groundwaters which establish present day, base- <br />line groundwater quality in the area. <br />Groundwater samples were retrieved for chemical analysis from <br />both test bores on March 31, 1980 (Table 1). Each water sample <br />was filtered in the field, split into approximately three equal <br />volumes and accordingly preserved with concentrated nitric and <br />sulfuric acids. The samples were delivered within 24 hours to <br />Core Laboratories, Inc., for chemical analysis. <br />Table 2 lists analytical findings on the two groundwater <br />samples. The chemical profiles are indicative of present day, <br />groundwater quality in the vicinity of the existing coal refuse <br />pile. Sample-no. P o33i-1 corresponds to the groundwater sample <br />retrieved from the test bore drilled at the head of the hollow, <br />snd sample no. p 0331-2 corresponds to the groundwater retrieved <br />from the drill hole located at the toe of the existing dam. <br />The chemical profile of the two groundwater samples are essen- <br />Bally similar. Both groundwatera are enriched in calcium, mag- <br />nesium, and sulfate ion and show negligible concentrations of <br />trace metals. The amount of dissolved solids present in ground- <br />3 <br />