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January 1995 <br />Ken Coa[ Company " 1999 Annual Hyd+ology Repot • 6 <br />TABLE 2 <br />SITE 79-61 <br />HISTORIC MINE AREA COAL AQUIFER WATER QUALITY DATA <br />PARAMETERS 1990 1991 1992 1993 1994 <br />Temp (deg C) 7 9 11 9 7 <br />pH Isul 7.55 8.1 8.4 8.4 7.8 <br />E.C. INmho/cm) @ 20°C 1230 800 767 1100 400 <br />TDS 723 765 674 476 368 <br />SAR 5.36 8.97 10.63 8.26 5.35 <br />Ca 64 34 26 15 18 <br />Na 177 218 220 166 112 <br />Mg 16 12 6 3 5 <br />K 3 5 3 3 3 <br />504 179 126 93 38 34 <br />CI 12 22 11 6 7 <br />CO3 6 0 29 38 0 <br />HCO3 383 495 450 343 292 <br />F - - 1.6 1.9 1.3 <br />NO3/N <0.02 0.04 1.47 0.05 0.13 <br />Fe Idissl 0.03 0.16 0.19 0.12 0.22 <br />Mn Idissl 0.04 0.07 0.05 0.05 0.04 <br />AI <0.05 <0.05 <0.05 <0.05 <0.01 <br />Ba 0.47 0.03 0.36 0.25 0.28 <br />B 0.07 0.07 0.17 0.15 0.18 <br />Cd <0.005 <0.005 <0.005 <0.005 <0.005 <br />Cr <0.01 <0.01 <0.01 <0.01 <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 0.0009 <0.0001 0.0003 <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 IOrthol 2 0.58 .38 .35 0.49 <br />V <0.01 <0.01 <0.01 <0.01 <0.01 <br />Note: All values in mg/I unless otherwise noted <br />All values represent mean annual values <br />SVw~LpVMhrAup <br />OVOIAS IlMp Rfl/~ <br />TmaMatrix Inc. ' P.O. Box 774078 • Stramboat Springy, Colorado 80477 (303J 8796260 <br />