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/anuary 1998 Ken Coal Company • 1997Annual Hydrology Report ` CO Permit No. C-80-006 • 6 <br />• <br />u <br /> <br />TABLE 2 <br />SITE 79-61 <br />HISTORIC MINE AREA COAL AQUIFER WATER QUALITY DATA <br />Parameters 1993 1994 1995 1996 1997 <br />Tem 1°CI 9 7 8 7.1 8.4 <br />H (sul 6.4 7.8 7.5 7.7 8.2 <br />E.C. lumhoslcml @ 20°C 550 400 550 643 1165 <br />TDS 476 368 437 543 710 <br />SAR lin water) 8.26 5.35 6.99 5.33 9.71 <br />Calcium (dissolved) 15 18 20 37.4 43.3 <br />Sodium (dissolved) 166 112 134 144 227 <br />Ma nesium Idissolvedl 3 5 6 10.3 11.9 <br />Potassium (dissolved) 3 3 2 2.8 3.1 <br />Sulfate 38 34 22 59 68 <br />Chloride 6 7 7 14 20 <br />Carbonate las CaC03) 38 0 <2 <2 3.5 <br />Bicarbonate las CaC03) 343 292 355 375 562 <br />Fluoride 1.9 1.3 1.2 1 1.3 <br />Nitrate-Nitro en Idissolvedl 0.05 0.13 0.04 <0.2 <0.02 <br />Iron Idissolvedl 0.12 0.22 0.32 0.29 0.07 <br />Man anese Idissolvedl 0.05 0.04 <0.01 0.05 0.02 <br />Aluminum (dissolved) <0.05 <0.01 <0.05 <0.03 0.06 <br />Barium Idissolvedl 0.25 0.26 0.3 0.39 0.35 <br />Boron Idissolvedl 0.15 0.18 0.17 0.18 0.17 <br />Cadmium Idissolvedl <0.005 <0.005 <0.005 <0.003 <0.003 <br />Chromium Idissolvedl <0.01 <0.01 <0.01 <0.01 <0.01 <br />Co er Idissolvedl <0.01 <0.01 <0.01 <0.01 <0.01 <br />Lead Idissolvedl <0.02 <0.02 <0.02 <0.02 <0.02 <br />Mercu Idissolvedl <0.0001 <0.0002 <0.0002 <0.0002 <0.0002 <br />Mol bdenum Idissolvedl <0.05 <0.01 <0.01 <0.01 <0.01 <br />Nickelldissolvedl <0.02 <0.02 <0.02 <0.01 <0.01 <br />Phos horns lortho dissolved) .35 0.49 0.54 0.53 0.40 <br />Vanadium Idissolvedl <0.01 <0.01 <0.01 <0.005 <0.005 <br />Note: All values in mgll unless otherwise noted. <br />All values represent mean annual values. <br />On 414/95, the laboratory reported total recoverable Fe end Mn instead of dissolved <br />values. These values were not included in the 1995 mean annual values reported in this <br />table. <br />H~~I'TItiM1NNWLRP(~HTOM1O FIJL TenoMatrix lnc.`RO. Boz 774018•Steamboat Springy, Colorado 80477 •(970J 879-62606 <br />