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Well SOM-C-76 <br />Water Quality and Field Parameters <br />• <br />• <br />\I <br />Mountain Coal West Elk Mine <br />Monitoring Location Well SOM-C-76 Baseline 2003 Water Year <br />Descri lion Units Minimum Maximum Mean 4/12/2003 6/6/2003 9/28/2003 <br />Field Parameters <br />Water Level De th feet 218.82` 217.82 218.05 <br />Electrical Conductivi umhos/cm 1910 2500 2970 2950 2750 2660 <br />H SU 5.2 8.2 9.3 7.95 8.11 7.8 <br />Tem erature oC 8.2 11.7 14.2 54.2 57.9 58.7 <br />Comment `to of culvert <br />Laborato Parameters <br />Name of Certifed Lab ACZ <br />Lab Reference # L43143-06 <br />Sam le Dale 9/28/2003 <br />Lab Test Date 9/30-10/21 <br />Sam led B <br />Alkalini Total CaCO3 m /I 1294 1503 1860 1470 <br />Aluminum, dissolved m /I <br />Ammonia m 11 D 0.64 1.36 <br />Anions me A 29.6 30.88 32.71 29.5 <br />Arsenic, dissolved m /I 0 0 0.001 0.0004 <br />Arsenic, total m /I <br />Bicarbonate m /I 41 1181 1894 1470 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I 0 0 0 -0.005 <br />Calcium, dissolved m I 1.6 2 2.3 i.6 <br />Carbonate m I 0 30 186 -2 <br />Cation -Anion Balance % -3.3 -0.45 3 -6.5 <br />Cations me /I 29.3 30.53 31.5 25.9 <br />Chloride m l 0 4 17 3 <br />Conductivi umhos/cm 2300 2487 2650 2280 <br />Co er, dissolved m /I <br />HafdnesS m / 6 15 43 6 <br />H droxide m /I 0 0 0 -2 <br />Iron, dissolved m /I 0 0.13 1 0.31 <br />Iron, total m /I 0 5.01 18 2.04 <br />Lead, dissolved m /I 0 0 0 -0.04 <br />Ma nesium, dissolved m /I 0.6 0.8 1.5 0.6 <br />Man anese, dissolved m /I 0 0.005 o.ots -0.005 <br />Man anese, total m !I 0 0.017 0.145 0.012 <br />Mercu ,dissolved m /I 0 0 0 -0.0002 <br />Mol bdenum, dissolved m /I <br />Nitrate/Nitrite asN m /I 0 o.1s 2.is 0.05 <br />Nitr en, ammonia /I 0.57 0.65 0.73 0.63 <br />H SU 7.9 8.4 9.3 8.2 <br />Phos hate m /I 0.06 0.06 0.06 0.15 <br />Phos horns Ortho ,dissolved m /I 0 0.068 1.26 0.05 <br />Potassium, dissolved m /I 3.6 3.9 4.2 3.4 <br />Selenium, dissolved m /I 0 0 0 -0.001 <br />Selenium, total m /I <br />Sodium Absor lion Ratio SAR talc. 46.1 102.7 128.6 101 <br />Sodium, dissolved m /I 658 700 756 583 <br />Sulfate m /I 0 9 180 -10 <br />TDS Ratio talc. <br />TDS Calc. m /I <br />TDS m /I 1530 1642 2590 1620 <br />TSS m /I 7 37 226 <br />Zinc, dissolved m /I 0 0 0.01 0.03 <br /> <br />ACZ -ACZ Labs, Steamboat S rin s, Colorado <br />' Standard is for reference ur oses onl <br />NA - not a livable NM -not measured NR -not re orted <br /> <br />West Elk Mine <br />0-71 2003 Annual Hydrology Report HydroGeo, Inc. <br />