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The minor element and trace element content of the ground water is generally ver}• lo:a. :lany of the parameters measured were found to be at or below the detection limit of the methods used. However, some constituents are above the national Interim Primary Drinking Slater Standards (t7IPD[dS). The concentration of lead was Found to be at or above the standard of 0.05 ml(1 in some samples from Sdells GA-1, GA-3, GA-4, GB-2, GB-3, GB-5, GC-1, CC-2, GC-3, GE-1, GE-2 and GE-3. The selenium levels were analyzed at or above the standard of 0.01 mg/1 in one sample from (dells GA-1, GA-4, GB-1, GB-Z, CB-5, GC-1, GC-3, GE-1, GE-2 and GE-3. The arsenic standard (0.05 mg/1) is exceeded in only one sample from well GE-3, while levels approach the standard in (dells GA-1, CC-1, GD-1 and GE-1. For the proposed National Secondary Drinking [Dater Regulations (NSDh~), it appears that both iron and manganese levels may exceed the recommended limits. The iron content exceeds the limit of 0.3 mg/1 in all c;ells. The manganese recommended limit (0.05 mg/1) is exceeded in all wells. The pH of all wells except GE-l, CC-2 and GE-3 falls :oithin the recommended range of 6.5 to 8.5. Copper levels in all wells except GA-2, GB-1 and GD-1 eYCeed the recommended limits of 0.2 mg/1 for continuous irrigation. In summary, it appears that the most sensitive species insofar as the NIPD[d5 are concerned are arsenic, lead, and selenium. Addition of even small amounts of these constituents to ground stater could cause the water to exceed the standards for these elements. For the NSD:~~, the most sensitive species are iron and manganese. Tl~e concentrations of both of these species exceed the recommended limits under natural conditions. If the ground water were ever considered for continuous irrigation use, which is unli~ely, then copper could also be considered to be sensitive. 2-507