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January 1995 <br />Kerr Coal Company " 1994 Annual Hydrology Report • 9 <br />TABLE 4 <br />SITE 79-2 <br />HISTORIC MINE AREA OVERBURDEN WATER QUALITY DATA <br />PARAMETERS 1990 1991 1992 1993 1994 <br />Temp Ideg CI 8 8.5 9.5 8.5 8.0 <br />pH Isu) 8.1 8.5 8.6 8.6 8.70 <br />E.C. (umho/cml @ 20°C 3040 2450 2300 2250 2350 <br />TDS 1683 1733 1659 1588 1645 <br />SAR 58.00 43.44 45.03 44.75 45.85 <br />Ca 11 11 12 12 12 <br />Na 677 572 622 629 644 <br />Mg 1 2 2 2 2 <br />K 3 5 3 3 3 <br />504 2 <2 28 23 4 <br />CI 755 740 715 759 790 <br />CO3 7 0 8 20 20 <br />HCO3 383 394 387 382 397 <br />F 1.5 1.6 1.5 <br />NO3/N <0.02 0.13 0.83 0.13 0.07 <br />Fe Idissl 0.02 0.03 0.15 0.07 <0.02 <br />Mn Idissl 0.01 0.02 0.01 0.01 0.03 <br />AI <0.05 0.09 <0.05 0.07 <0.05 <br />Ba 0.33 0.30 0.38 0.34 0.34 <br />B <0.02 0.11 0.11 0.11 0.11 <br />Cd <0.005 <0.005 <0.005 <0.005 <0.005 <br />Cr 0.01 <0.01 <0.01 <0.07 <0.01 <br />Cu 0.01 <0.01 <0.01 <0.01 <0.01 <br />Pb <0.02 <0.02 <0.02 <0.02 <0.02 <br />Hg 0.0003 <0.0001 <0.0001 0.0007 <0.0002 <br />Mo <0.05 <0.05 <0.05 <0.05 0.03 <br />Ni <0.02 <0.02 <0.02 <0.02 <0.02 <br />P IOrthol <0.01 <0.01 <0.01 0.01 0.01 <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 />is~wns ~,~.rhs'v"~ TenaMatriz lnr. " P.O. Bos 774018 "Steamboat SpnnBr, Colorado 80477 (303J 879fi260 <br />