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' 1wurary 1999 h'en Coal Comparsv ' 1998 Annual Hvrlro(o,¢y Report "CO Permit r\`o G80~006 ~ Pa,Qe 9 <br /> <br />t <br /> <br />1 <br />1 <br /> <br />1 <br /> <br />1 <br />1 <br />l J' <br /> <br />1 <br /> <br />TABLE 4 <br />HISTORIC MINE AREA OVERBURDEN WATER QUALITY DATA <br />SRE 79-2 <br />Parameters 1994 1995 1996 1997 1998 <br />Temp I°CI 8.0 6.5 6.7 9.2 10.4 <br />H Isul 6.7 8 8.3 8.7 8.5 <br />E.C. (µmhos/cml @ 20° C 2350 2400 2648 3225 3035 <br />TDS 1645 1655 1703 1705 1620 <br />SAR lin water) 45.9 44.8 46.0 49.5 <br />Calcium Idissolvedl 12 12 11.9 12.6 13.7 <br />Sodium Idissolvedl 644 620 649 729 692 <br />Ma nesium Idissolvedl 2 2 2.1 2.2 3 <br />Potassium (dissolved) 3 4 3.6 3.4 2.9 <br />Sulfate 4 < 10 < 10 56 < 10 <br />Chloride 790 770 777 755 735 <br />Carbonate las CaC031 20 <2 <2 <2 11 <br />Bicarbonate las CaC031 397 425 412 417 411 <br />Fluoride 1.5 1.5 1.6 1.5 1.5 <br />Nitrate-Nitro en Idissolvedl 0.07 0.05 0.25 <0.02 0.04 <br />Iron Idissolvedl <0.02 0.1 0.07 0.06 0.11 <br />Man anese Idissolvedl 0.03 0.03 0.03 0.02 0.03 <br />Aluminum Idissolvedl <0.05 <0.05 <0.06 0.11 <0.06 <br />Barium Idissolvedl 0.34 0.33 0.35 0.24 0.32 <br />Boron Idissolvedl 0.11 0.1 0.1 0.11 0.11 <br />Cadmium Idissolvedl <0.005 <0.005 <0.006 <0.006 <0.006 <br />Chromium Idissolvedl <0.01 <0.01 <0.02 <0.02 <0.02 <br />Co per Idissolvedl <0.01 <0.01 <0.02 <0.02 <0.02 <br />Lead (dissolved) <0.02 <0.02 <0.04 <0.04 <0.08 <br />Mercury Idissolvedl <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <br />Mol bdenum Idissolvedl 0.03 0.03 0.03 0.04 0.03 <br />Nickel Idissolvedl <0.02 <0.02 <0.02 <0.02< <0.02 <br />Phosphorus lortho dissolved) 0.01 <0.005 0.02 0.01 <0.005 <br />Vanadium Idissolvedl <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 />On 4/4/95, the laboratory reported total recoverable Fe and Mn instead of dissolved values. <br />These values were not included in the 1995 mean annual values reported in this table. <br />Montgomery Watson *P.O. Box 779018 "Steamboat Springs, Ca(orado 80477 "(970J 879-6160 <br />' 'Y:`AflUnnW Rrym`19YA`19YA Hrl.dyp lepm~ <br />l/II/99 Jv <br />