2009-07-01_REPORT - C1980007 (8)

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Spring G-20 Water Quality and Field Parameters • • 11 Mountain Coal West Elk Mine Monitoring Location Spring G-20 Baseline' 2003 Water Year Description Units Minimum Maximum Mean 5/9/2008 6/6/2008 8/23/2008 Field Parameters Flow m 1.5 0.4 3 Electrical Conductivity jtmhos/cm 955 900 998 H SU 8.07 8.50 8.43 Temperature (°C) °C 12.3 21.8 12.5 Comment Laboratory Parameters' Name of Certified Labe Enviro-Chem Lab Reference # 08/919 Sample Date 6/6/2008 Lab Test Date 6/9-7/3 Sampled B P. Holder Alkalinity (Total CaC03) mg/I Aluminum, dissolved m /I Anions me /I Arsenic, dissolved m /I Arsenic, total m /I Bicarbonate m /I 452 657 539 Boron, dissolved m /I Cadmium, dissolved m /I Calcium, dissolved m /I 81 81 81 Carbonate m /I Cation - Anion Balance m /I Cations me /I Chloride m /I 1.2 10 5.3 Conductivity µmhos/cm 970 1090 1023 661.92 Copper, dissolved m /I Hardness m /I 193 416 318 Hydroxide m /I Iron, dissolved m /I 0.05 0.01 0.03 Iron, total m /I 0.32 0.05 0.85 Lead, dissolved m /I Magnesium, dissolved m /I 33.3 33.3 33.3 Manganese, dissolved m /I 0.002 0.002 0.002 Manganese, total m /I 0.06 0.005 Mercury, total m /I Molybdenum, dissolved m /I Nitrate as N m /I Nitrate/Nitrite as N m /I 0.01 0.05 0.03 Nitrite as N m /I H lab SU 7 8.1 7.7 8.41 Phosphate m /I Phosphorus Ortho , dissolved m /I 0.15 0.02 Potassium, dissolved m /I Selenium, dissolved m /I Selenium, total m /I Sodium Absorption Ratio SAR calc. 2.31 2.73 2.52 Sodium, dissolved m /I 102 102 102 Sulfate m /I 16 117 81 TDS Ratio calc. TDS Calc. m /I TDS m /I 502 686 598 539 TSS m /I 19.6 3.5 70 Zinc, dissolved mg/I 11 Baseline pre -2000 data, adapted from WWE (2001) 2 Enviro-Chem Analytical, Grand Junction, CO West Elk Mine E-19 2008 Annual Hydrology Report HydroGeo, Inc.