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<br />/anuary 1997 Kerr Caal Company * 1996 Anrsual Hydrology Repot * CO Permit No. C~80-006 ~ 6 <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br /> <br />1 <br /> <br />1 <br />1 <br /> <br /> <br /> <br /> <br />45T9E~NNURLRPT\MYDRO.ML <br />/IN9) Yb <br />TABLE 2 <br />SITE 79-61 <br />HISTORIC MINE AREA COAL AO.UIFER WATER QUALITY DATA <br />Parameters 1992 1993 1994 1995 1996 <br />Temp 1°CI 11 9 7 6 7.1 <br />pH Isul 8.25 8.4 7.8 7.5 7.7 <br />E.C. lµmhoslcm) @ 20°C 600 550 400 550 643 <br />TDS 552 476 368 437 543 <br />SAR lin water) 7.91 8.26 5.35 6.99 5.33 <br />Calcium (dissolved) 27.5 15 18 20 37.4 <br />Sodium (dissolved) 166 166 112 134 144 <br />Magnesium Idissolved) 7 3 5 6 10.3 <br />Potassium (dissolved) 3 3 3 2 2.8 <br />Sulfate 112 38 34 22 59 <br />Chloride 10.5 6 7 7 14 <br />Carbonate las CaC03) 12 38 0 <2 <2 <br />Bicarbonate las CaC031 336 343 292 355 375 <br />Fluoride 1.2 1.9 1.3 1.2 1 <br />Nitrate-Nitrogen Idissolved) 2.2• 0.05 0.13 0.04 <0.2 <br />Iron Idissolved) 0.23 0.12 0.22 0.32 0.29 <br />Manganese Idissolved) 0.04 0.05 0.04 <0.01 0.05 <br />Aluminum (dissolved) <0.05 <0.05 <0.01 <0.05 <0.03 <br />Barium Idissolved) 0.47 0.25 0.28 0.3 0.39 <br />Boron (dissolved) 0.18 0.15 0.18 0.17 0.18 <br />Cadmium Idissolved) <0.005 <0.005 <0.005 <0.005 <0.003 <br />Chromium Idissolved) <0.01 <0.01 <0.01 <0.01 <0.01 <br />Copper Idissolved) <0.01 <0.01 <0.01 <0.01 <0.01 <br />Lead Idissolved) <0.02 <0.02 <0.02 <0.02 <0.02 <br />Mercury (dissolved) 0.0006 <0.0001 <0.0002 <0.0002 <0.0002 <br />Molybdenum (dissolved) <0.05 <0.05 <0.01 <0.01 <0.01 <br />Nickelldissolvedl <0.02 <0.02 <0.02 <0.02 <0.01 <br />Phosphorus (ortho dissolved) .41 .35 0.49 0.54 0.53 <br />Vanadium (dissolved) <0.01 <0.01 <0.01 <0.01 <0.005 <br />Note: All values in mg/I unless otherwise noted. <br />All values represent mean annual values. <br />On 4/4/95, the laboratory reported total recoverable Fe and Mn instead oT dissolved <br />values. These values were not included in the 1995 mean annual values reported in this <br />table. <br />• Indicates the mean includes a result from~the sample collected 3131/92 which is <br />anomalous based on comparison with prior and subsequent samples. <br />TenaMatriz Inc. * P.O. Boz 774018 • Steamboat Springs, Colorado 80477 • (970f 879-6160 <br />