2023-04-19_PERMIT FILE - C1981010A (4)

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The minor element and trace element content of the ground water is generally very lora. Many 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 (NIPDWS). The concentration of lead was found to be at or above the standard of 0.05 ml/l in some samples from Wells Ga -1, GA -3, GA -4, GB72, 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/l in one sample from Wells GA -1, GA -4, GB -1, GB -2, CB -5, GC -1, GC -3, GE -1, CE -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 (Jells GA -1, CC -1, GD -1 and GE -1. For the proposed National Secondary Drinking [Dater Regulations (NSM%R), it appears that both iron and manganese levels may exceed the recommended limits. The OPiron content exceeds the limit of 0.3 mg/l in all wells. The manganese recommended limit (0.05 mg/1) is exceeded in all wells. The pH of all wells except GE -1, CC -2 and GE -3 falls within the recommended range of 6.5 to 8.5. Copper levels in all wells except GA -2, GB -1 and GD -1 exceed the recommended limits of 0.2 mg/1 for continuous irrigation. In summary, it appears that the most sensitive species insofar as the NIPDWS are concerned are arsenic, lead, and selenium. Addition of even small amounts of these constituents to ground water could cause the water to exceed the standards for these elements. For the NSD:, the most sensitive species are iron and manganese. The 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 unlikely, then copper could also be considered to be sensitive. 2-507