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' famlarv 1999 Ken Coal Company " 1998 Anmlal Hvdrolo.ev Brport "CO Pernut :Vo. C 80006 ~ PvQr 13 <br />1 <br /> <br /> <br /> <br />1 <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />1 <br />i <br />TABLE 5 <br />HISTORIC MINE AREA ALLUVIAL WATER QUALITY DATA <br />SITE AO-2A <br />Parameters 1994 1995 1996 1997 1998 <br />Temp 1°CI 8 7.7 8.6 9.3 7.4 <br />pH Isul 7.8 7.2 6.9 7.5 7.6 <br />E.C. Ipmhos/cml @ 20°C 857 1033 775 638 871 <br />TDS 841 863 673 580 817 <br />SAR (in water) 2.91 2.74 2.40 1.97 2.84 <br />Calcium (dissolved) 96 93 77.2 70.2 91.9 <br />Sodium Idissolvedl 139 130 103 80 131 <br />Ma nesium Idissolvedl 52 48 39.6 34.7 46.0 <br />Potassium Idissolvedl 4 3 3.6 4.4 3.9 <br />Sulfate 269 330 193 153 280 <br />Chloride 9 12 7.3 5.5 11.7 <br />Carbonate las CaCO31 0 <2 <2 <2 <2 <br />Bicarbonate las CaCO31 469 395 363 302 373 <br />Fluoride 0.3 0.4 0.45 0.4 0.4 <br />Nitrate-Nitro en (dissolved) 1.58 4.54 5.39 0.53 0.28 <br />Iron (dissolved) 0.05 0.27 0.49 0.22 0.12 <br />Man anese Idissolvedl 0.52 0.69 0.60 0.35 0.80 <br />Aluminum Idissolvedl <0.05 <0.05 <0.03 0.03 <0.03 <br />Barium Idissolvedl 0.10 0.11 0.10 0.09 0.11 <br />Boron Idissolvedl 0.09 0.13 0.13 0.16 0.15 <br />Cadmium Idissolvedl <0.005 <0.005 <0.003 <0.003 <0.003 <br />Chromium Idissolvedl <0.01 <0.01 <0.01 <0.01 <0.01 <br />Copper Idissolvedl <0.01 <0.01 <0.01 0.01 <0.01 <br />Lead (dissolved) <0.02 <0.02 <0.02 <0.04 <0.2 <br />Mercury Idissolvedl <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <br />Molybdenum (dissolved) <0.01 <0.01 <0.01 <0.01 <0.01 <br />Nickel Idissolvedl <0.02 <0.02 <0.01 <0.01 <0.01 <br />Phosphorus lortho dissolved) 0.01 0.03 0.07 0.02 0.01 <br />Vanadium Idissolvedl <0.01 <0.01 <0.005 <0.005 <0.03 <br />Notes: All values in mg/I unless otherwise noted. <br />All values represent mean annual values <br />Montgomery Watton "P.O. Box 774018 "Steamboat Springs, Colorado 80477 •(970f 879-6260 <br />' I['~\tlVUnnrl R.ymVYYAVYVM HW~doq Fqm <br />I/IIiY4 Ja' <br />