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January 1995 <br />Kerr Coal Comparsy * 1994 Annual Hydrology Report • 8 <br />TABLE 3 <br />SITE 79-1 <br />HISTORIC MINE AREA OVERBURDEN WATER QUALITY DATA <br />PARAMETERS 1990 1991 1992 1993 1994 <br />Temp (deg C) 8.0 9.0 10.5 8.5 7.5 <br />pH (su) 7.5 8.1 8.2 8.5 8.4 <br />E.C. Uymho/cml @ 20°C 1290 900 950 950 1000 <br />TDS 846 888 834 795 831 <br />SAR 29.22 20.62 24.37 26.15 25.62 <br />Ca 10 13 9 9 9 <br />Na 332 290 290 307 294 <br />Mg 1 4 2 1 1 <br />K 1 4 3 2 2 <br />SO4 272 271 271 270 236 <br />CI 14 19 18 16 15 <br />CO3 6 0 0 58 0 <br />HCO3 381 416 370 349 416 <br />F 0.3 0.3 0.3 <br />NO3/N 1.44 1.33 2.94 1.71 1.57 <br />Fe (dissl 0.02 cO.O2 0.22 0.03 <0.02 <br />Mn (dissl 0.01 0.02 0.02 0.01 0.01 <br />AI 0.02 <0.05 <0.05 <0.05 <0.05 <br />ea 0.04 0.03 0.03 0.04 0.04 <br />B 0.02 0.10 0.11 0.12 0.12 <br />Cd <0.005 cO.OO5 <0.005 <0.005 <0.005 <br />Cr 0.01 <0.01 <0.01 <0.01 <0.01 <br />Cu 0.02 0.01 <0.01 0.01 <0.01 <br />Pb 0.03 <0.02 <0.02 <0.02 <0.02 <br />Hg 0.0004 cO.OOO1 <0.0001 0.0001 <0.0002 <br />Mo <0.05 <0.05 <0.05 <0.05 <0.01 <br />Ni <0.02 <0.02 <0.02 <0.02 <0.02 <br />P (Ortho1 0.1 B 0.12 0.13 0.18 0.17 <br />V <0.01 <0.01 <0.01 <0.01 <0.01 <br />Notes: All values in mg/I unless otherwise noted <br />All values represent mean annual values <br />,ova°,~° .r~r'v~ ~ TmaMat+iz Inc. * P.O. Box 774018 * SteamGoar Springy, Colorado 80477 (303J 8796260 <br />