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Table 5 ~URFACE WATER CHEMICAL ANALYSIS Monitoring Site ROARING FORK Location DOWNSTREAM Date of Collection 09/29/80 06/11/81 08/13/81 12/18/81 03/28/82 FIELD PARAMETERSI Conductivity (umhos/em at 25(C)) NA 600 330 475 575 pH (units) NA 7.6 7.7 7.4 7.9 Water Temperature (C) NA 13 15 0.0 6 LABORATORY PARAMETERSI Aluminum -0.001 0.02 0.03 0.009 0.006 Arsenic -0.001 -0.001 -0.001 -0.001 -0.001 Barium -0.001 -0.001 -0.001 -0.001 -0.001 Bicarbonate 142 89 183 136 34 Boron 0.045 0.16 0.115 0.08 0.500 Cadmium -0.001 -0.001 -0.001 -0.001 -0.001 Calcium 74.86 29.9 93.6 80.0 84.300 Carbonate 9.6 -0.001 -0.001 -0.01 -0.001 Cation - Anion Balance (~)3 ~ -4.22 -5.12 .94 -30.06 hloride 10 11.2 8 8.0 10 Chromium -0.001 -0.001 -0.001 -0.001 0.001 Copper 0.012 -0.001 0.005 -0.001 0.003 Fluoride 0.20 0.080 0.265 0.166 0.240 Hardness (as CaCO3) 106 340 290 268 Iron (dissolved) 0.280 0.050 0.20 0.04 -0.001 Lead -0.001 -0.001 -0.001 -0.001 Magnesium 19.92 8.16 19.4 12.7 15.900 Manganese (dissolved) 0.013 -0.001 0.005 0.010 -0.001 Mercury (ug/1) -0.1 -0.01 -0.1 -0.1 -1 Molybdenum 0.002 -0.001 -0.001 0.011 -0.001 Nitrogen - Ammonia _ 0.158 0.21 0.675 -0.001 0.200 Nitrate as N 0.40 -0.001 0.070 -0.001 Phosphate 0.085 0.490 0.06 0.030 Potassium 1.57 1.2 1.8 0.90 1.330 Selenium -0.001 -0.001 -0.001 -0.001 -0.001 sodium 7.3 3.0 6.5 4.0 7.110 Solids, Total Dissolved 374 254 360 390 430 Solids, Total Suspended 3.2 1.6 0.8 11.6 Sulfate 109 16 131 138 111 Sulfide as S -0.001 -0.001 -0.001 -0.1 Zinc 0.026 0.004 0.016 0.013 0.011 VOLATILE SOLIDS 130 52 96 28 1 All measurements are in milligrams per liter (mg/1) unless otherwise noted. A minus sign indicates concentrations below analytical detection limits. Negative acidity indicates that the water is alkaline. 3 A negative balance indicates that cations exceed anions.