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funuary 1000 Ken Coal Companv ' 1999 Annual Hydrolo,ey Report ' CO Pemlit No. G30~006 ~ PaQe 9 <br /> <br /> <br /> <br /> <br /> <br /> <br />1 <br />1 <br />1 <br /> <br /> <br />1 <br />t <br />1 <br /> <br /> <br />C] <br />TABLE 4 <br />HISTORIC MINE AREA OVERBURDEN WATER QUALITY DATA <br />SITE 79-2 i <br />Parameters 1995 1996 1997 1999 1999"' <br />Tem 1°CI 6.5 8.7 9.2 10.4 8.9 <br />pH fsul 8 8.3 8.7 8.5 8.4 <br />E.C. 1 mhos/cml @ 20° C 2400 2648 3225 3035 3170 <br />TDS 1655 1703 1705 1620 1750 <br />SAR lin water) 44.8 46.0 49.5 29.9 <br />Calcium (dissolved) 12.0 11.9 12.6 13.7 22.1 <br />Sodium Idissolvedl 620 649 729 692 655 <br />Ma nesium Idissolvedl 2.0 2.1 2.2 3.0 9.2 <br />Potassium (dissolved) 4.0 3.6 3.4 2.9 3.0 <br />Sulfate < 10 < 10 58 < 10 50 <br />Chloride 770 777 755 735 700 <br />Carbonate (as CaCO31 <2 <2 <2 11 4 <br />Bicarbonate las CaCO3) 425 412 417 411 413 <br />Fluoride 1.5 1 .6 1.5 1 .5 1 .4 <br />Nitrate-Nitro en Idissolvedl 0.05 0.25 <0.02 0.04 <0.02 <br />Iron Idissolvedl 0.1'x' 0.07 0.08 0.11 0.01 <br />Man anese Idissolvedl 0.03"' 0.03 0.02 0.03 0.11 <br />Aluminum Idissolvedl <0.05 <0.06 0.11 <0.06 <0.03 <br />Barium Idissolvedl 0.33 0.35 0.24 0.32 0.27 <br />Boron Idissolvedl 0.10 0.10 0.11 0.11 0.12 <br />Cadmium Idissolvedl <0.005 <0.006 <0.006 <0.006 <0.003 <br />Chromium Idissolvedl <0.01 <0.02 <0.02 <0.02 <0.01 <br />Co er Idissolvedl <0.01 <0.02 <0.02 <0.02 <0.01 <br />Lead Idissolvedl <0.02 <0.04 <0.04 <0.06 <0.04 <br />Mercur Idissolvedl <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <br />Molybdenum Idissolvedl 0.03 0.03 0.04 0.03 0.03 <br />Nickel (dissolved) <0.02 <0.02 <0.02< <0.02 <0.01 <br />Phos harus lortho dissolved) <0.005 0.02 0.01 <0.005 0.012 <br />Vanadium Idissolvedl <0.01 <0.01 <0.01 <0.01 <0.005 <br />Notes: All values represent mean annual values in mg/I unless otherwise noted. <br />"' 1999 values are based on October 1998 sampling event only. No additional sampling <br />performed. <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. Boz 774018 'Steamboat Springs, Colorado 80477' (970f 8796260 <br />' 'l'\d)lUnnW flqun~lrrr\l9Yr llrlrygp Rryvn <br />//01/00/m/ <br />