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Table 6 ~URFACE WATER CHEMICAL ANALYSIS Monitoring Site ROARING FORK Location UPSTREAM Date of Collection 09/29/80 06/11/81 08/13/81 12/17/81 03/28/82 FIELD PARAMETERSI Conductivity (umhos/em at 25(C)) NA 625 460 450 500 pH (units) NA 7.7 7.8 7.3 7.9 Water Temperature (C) NA 12 16 0.0 5 LABORATORY PARAMETERSI Aluminum 0.013 0.005 0.04 0.015 0.010 Arsenic -0.001 -0.001 -0.001 -0.001 -0.001 Barium -0.001 -0.001 -0.001 -0.001 -0.001 Bicarbonate 120 75.02 199 133 150 Boron 0.030 -0.001 0.135 -0.001 0.241 Cadmium -0.001 -0.001 -0.001 -0.001 -0.001 Calcium 74.86 30.5 90.9 77.6 79 Carbonate 8.4 -0.001 2.51 -0.001 -0.001 Cation - Anion Balance (~)3 3.15 .54 2.01 4.61 Chloride 10 3.6 10 4.4 8.4 Chromium -0.001 -0.001 -0.001 -0.001 -0.001 Copper 0.012 -0.001 0.001 0.009 0.008 Fluoride 0.23 0.084 0.27 0.158 0.230 Hardness (as CaC03) 103 290 253 247 Iron (dissolved) 0.080 -0.001 0.10 0.07 -0.001 Lead 0.001 0.003 0.004 -0.001 Magnesium 17.43 5.72 19.4 7.9 9 Manganese (dissolved) 0.004 0.002 0.006 0.003 0.002 Mercury (ugll) -0.1 -0.01 -0.1 -0.1 -0.1 Molybdenum 0.001 -0.001 -0.001 0.004 -0.001 Nickel -0.001 -0.001 -0.001 -0.001 0.003 Nitrogen - Ammonia 0.458 0.06 0.5 -0.001 0.300 Nitrate as N 0.14 -0.001 0.060 0.080 Phosphate 0.009 0.536 0.04 0.020 Potassium 1.48 1.4 1.8 0.83 1.170 Selenium -0.001 -0.001 -0.001 -0.001 -0.001 Sodium 6.0 2.0 5.8 4.0 5.900 Solids, Total Dissolved 274 158 358 372 350 Solids, Total Suspended 5.4 2 3.6 3.6 Sulfate 117 43.8 138 125 132 Sulfide as S -0.001 -0.001 -0.001 -0.1 Zinc 0.024 0.034 0.019 0.004 0.012 VOLATILE SOLIDS 64 50 156 10 • All measurements are in milligrams per liter (mg/1) unless otherwise noted. A minus sign indicates concentrations below analytical detection limits. 2 Negative acidity indicates that the water is alkaline. 3 A negative balance indicates that cations exceed anions.