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Spring G-7 <br />Water Quality and Field Parameters <br />u <br />• <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring G-7 Baseline' 2008 Water Year <br />Description Units Minimum Maximum Mean 5/9/2008 6/6/2008 8/20/2008 <br />Field Parameters <br />Flow m 115 31 5.7 <br />Electrical Conductivity µmhos/cm 382 420 544 <br />1..1 SU 7.47 8.29 7.68 <br />Temperature OC 7.9 6.7 7.4 <br />Comment <br />Laboratory Parameters' <br />Name of Certified Labe Enviro-Chem <br />Lab Reference # 08/912 <br />Sample Date 6/6/2008 <br />Lab Test Date 6/9-7/3 <br />Sampled B P. Holder <br />Alkalinity (Total CaC03) mg/I <br />Aluminum, dissolved m /I 0.05 0.05 0.05 <br />Anions me /I <br />Arsenic, total m /I <br />Bicarbonate m /I 177 184 180.5 <br />Boron, dissolved m /I <br />Cadmium, dissolved m q/1 <br />Calcium, dissolved m /I 41.8 41.8 41.8 <br />Carbonate m /I <br />Cation - Anion Balance m /I <br />Cations me /l <br />Chloride m /I 1 0.5 <br />Conductivity µmhos/cm 387 414 400.5 354.96 <br />Copper, dissolved m /l <br />Hardness m /I 134 142 138 <br />Hydroxide m /I <br />Iron, dissolved m /I 0.04 0.07 0 0.03 <br />Iron, total m /I 0.35 0.4 0.375 0.38 <br />Lead, dissolved m q/1 0.02 0.01 <br />Lead, total m /I <br />Magnesium, dissolved m /I 6.8 7.2 7 <br />Manganese, dissolved m /l <br />Manganese, total m /I 0.005 0.006 0 <br />Mercury, total m q/1 <br />Molybdenum, dissolved m /l <br />Nitrate/Nitrite as N m /l 0.08 0.1 0.09 <br />H lab SU 7.8 8.1 7.98 7.61 <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I 0.014 0.007 <br />Potassium, dissolved m /I <br />Selenium, dissolved m /I <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR calc. 1.54 1.63 1.6 <br />Sodium, dissolved m /I 42.8 42.8 42.8 <br />Sulfate m /I 40 50 45 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS MO 230 230 230 248 <br />TSS m /I 10 30 20 2 <br />Zinc, dissolved mg/I <br />Baseline pre -2000 data, adapted from WWE (2001) <br />2 Enviro-Chem Analytical, Grand Junction, CO <br />West Elk Mine <br />E-9 2008 Annual Hydrology Report HydroGeo, Inc.