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4-4 Each ground water sample collected was turbid, which could cause detected total metals con- centrations to be higher Barium, arseruc, and chromium were detected in each ground water sample collected during the antral sampling round (Table 8) The maximum contaminant level (MCL) for chromium (0 10 mg/f) was exceeded in each of the ground water samples collected during the umtial sampling event Barium concentrations were detected as high as 1 6 mg/f The MCL for barium is 2 0 mg/f The MCL for arsenic (0 05 mg/f) was slightly exceeded by one sample with a concentration of 0 054 mg/f (MW-l) Remcor be- heves that the total metals concentrations were elevated due to the turbidity of the samples ' Lead was analyzed using a high detection limit (0 1 mg/f) during the initial sampling event Total lead was analyzed during the second ground water sampling event using a method with a lower detection limit (0 005 mg/f) The result of the analysis of the sample from Moni- toring Well MW-1 indicated that the 0 015 mg/f action level was exceeded ' 4 5 SITE WATER SUPPLY WELLS A water sample was collected from the water supply system via the water storage tank This sample is believed to be representative of ground water pumped from the site water supply wells The sample was analyzed for ammonia, hexavalent chromium, RCRA metals, and TCL VOCs Of these analyses, only barium was detected at a concentration of 0 05 mg/kg ' which is below the MCL of 2 0 mg/kg for banum. Lead was not detected in the water sam- ple, but the detection limit used for this analysis was 0 1 mg/kg This detection limit is too high to permit comparison with lead action levels Based on the analysis of the sample col- lected from the water supply system, it does not appear that a release from the former UFT ' has affected the water-bearing zone that is pumped by the site supply wells 29025 =0 "REALISrlC SOLUVONS FOR HAZARDOUS WASTE PROBLEMS" ej