2021-12-07_REVISION - M2012032 (24)

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Table U-6 Summary of Groundwater Data for Past 5 Quarters GW-16 Nondetect Sample Analyte Units Minimum Maximum Average Count Count Aluminum, dissolved mg/L 0.05 0.05 0.05 6 6 Antimony, dissolved mg/L 0.0005 0.00101 0.0008 6 Arsenic, dissolved mg/L 0.0002 0.00062 0.0005 6 Barium, dissolved mg/L 0.0309 0.0572 0.0494 6 Beryllium, dissolved mg/L 0.00008 0.00008 0.00008 6 6 Bicarbonate as CaCO3 mg/L 29.4 52.8 38.5 6 Boron, dissolved mg/L 0.02 0.03 0.02 6 6 Cadmium, dissolved mg/L 0.000125 0.0002 0.0001 6 Calcium, dissolved mg/L 19.9 36.3 29.8 6 Carbonate as CaCO3 mg/L 2 2 2 6 6 Chloride mg/L 0.5 0.6 0.5 3 4 Chromium, dissolved mg/L 0.0005 0.0005 0.0005 6 6 Conductivity @25C µS/cm 128 227 191 6 Copper, dissolved mg/L 0.0008 0.001 0.001 5 6 Cyanide,total mg/L 0.003 0.003 0.003 6 6 Fluoride mg/L 0.15 0.21 0.19 1 6 Hardness as CaCO3 (dissolved) mg/L 56 103 85 6 Hydroxide as CaCO3 mg/L 2 2 2 6 6 Iron, dissolved mg/L 0.06 0.06 0.06 6 6 Lead, dissolved mg/L 0.0001 0.00022 0.0002 1 6 Magnesium, dissolved mg/L 1.64 3.07 2.49 6 Manganese, dissolved mg/L 0.01 0.01 0.01 6 6 Mercury, dissolved mg/L 0.0002 0.0002 0.0002 6 6 Molybdenum, dissolved mg/L 0.0006 0.00327 0.0014 6 Nickel, dissolved mg/L 0.008 0.008 0.008 6 6 Nitrate/Nitrite as N mg/L 0.03 0.337 0.16 6 pH (lab) s.u. 7.4 8 7.7 6 Phosphorus,total mg/L 0.01 0.01 0.01 6 6 Potassium, dissolved mg/L 0.39 0.62 0.50 6 Total Dissolved Solids mg/L 72 154 125 6 Total Suspended Solids mg/L 5 10 6 5 6 Selenium, dissolved mg/L 0.00019 0.00041 0.00028 6 Silica, dissolved mg/L 4.3 5.6 4.8 6 Silver, dissolved mg/L 0.0001 0.0001 0.0001 6 6 Sodium, dissolved mg/L 1.74 2.74 2.10 6 Sulfate mg/L 34.3 69.2 53.1 6 Thallium, dissolved mg/L 0.0001 0.0001 0.0001 6 6 Total Alkalinity mg/L 29.4 52.8 38.5 6 Uranium, dissolved mg/L 0.0001 0.00012 0.0001 5 6 Vanadium, dissolved mg/L 0.01 0.01 0.01 6 6 Zinc, dissolved mg/L 0.05 0.29 0.10 6 pH (field) s.u. 6.68 8.29 7.45 6 Water Temperature (field) deg. C 1.2 8.4 5.4 6 ORP (field) mV 211 479 289 5