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anuary 1998 Kerr Coal Comyany " 1997Annual Hydrolo,Qy Report " CO Permit No. C-80006 ~ 9 <br />L ~~ <br /> <br /> <br />TABLE 4 <br />SITE 79-2 <br />HISTORIC MINE AREA OVERBURDEN WATER QUALITY DATA <br />Panmaters 1993 1994 1995 1996 1997 <br />Tem (°CI 8.5 8.0 6.5 8.7 9.2 <br />H (su) 8.6 8.7 8 8.3 8.7 <br />E.C. lµmholcml @ 20°C 2250 2350 2400 2648 3225 <br />TDS 1588 1645 1655 1703 1705 <br />SAR lin water) 44.8 45.9 44.8 46.0 49.5 <br />Calcium (dissolved) 12 12 12 11.9 12.6 <br />Sodium Idissolvedl 629 644 620 649 729 <br />Ma nesium Idissolvedl 2 2 2 2.1 2.2 <br />Potassium (dissolved) 3 3 4 3.6 3.4 <br />Sulfate 23 4 <10 <10 58 <br />Chloride 759 790 770 777 755 <br />Carbonate las CaC031 20 20 <2 <2 <2 <br />Bicarbonate las CeC03) 382 397 425 412 417 <br />Fluoride 1.6 1.5 1.5 1.6 1.5 <br />Nitrate-Nitro en (dissolved) 0.13 0.07 0.05 0.25 <0.02 <br />Iran Idissolvedl 0.07 <0.02 0.1 0.07 0.08 <br />Man anase Idissolvedl 0.01 0.03 0.03 0.03 0.02 <br />Aluminum Idissolvedl 0.07 <0.05 <0.05 <0.06 0.11 <br />Barium Idissolvedl 0.34 0.34 0.33 0.35 0.24 <br />Boron Idissolvedl 0.11 0.11 0.1 0.1 0.11 <br />Cadmium Idissolvedl <0.005 <0.005 <0.005 <0.006 <0.006 <br />Chromium Idissolvedl <0.01 <0.01 <0.01 <0.02 <0.02 <br />Co er Idissolvedl <0.01 <0.01 <0.01 <0,02 <0.02 <br />Lead (dissolved) <0.02 <0.02 <0.02 <0.04 <0.04 <br />Mercur Idissolvedl 0.0007• <0.0002 <0.0002 <0.0002 <0.0002 <br />Mol bdenum Idissolvedl <0.05 0.03 0.03 0.03 0.04 <br />Nickelldissolvedl <0.02 <0.02 <0.02 <0.02 <0.02 <br />Phos horns lortho dissolved) 0.01 0.01 <0.005 0.02 0.01 <br />Vanadium (dissolved) <0.01 <0.01 <0.01 <0.01 <0.01 <br />Notes: All values in mgll 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 />• Indicates the mean includes a result which is anomalous based on comparison with prior end <br />subse uent sam les. <br />H~\1»\%ANNUAL.RPfWYD0.0 FNL TerraMarris lnc. "P.O. Bas 774018 "SreamboarS rin Colorado 80477' 970 87961609 <br />inim ae P 85, <br />