2009-07-01_REPORT - C1980007 (8)

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Well GP-6 Water Quality and Field Parameters .7 C7 • Mountain Coal West Elk Mine Monitoring Location Well GP-6 Baseline' 2008 Water Year Description Units Minimum Maximum Mean 5/9/2008 6/6/2008 8/20/2008 Enviro-Chem MDL Field Parameters Water Level Depth feet 32.9 33.0 49.1 Electrical Conductivity mhos/cm 1067 1086 1058 H SU 7.16 7.38 7.71 Temperature (°C °C 10.8 10.8 10.8 Comment Laboratory Parameters 3 Name of Certified Lab 2 Enviro-Chem Lab Reference # 08/1501 Sample Date 8/20/2008 Lab Test Date 8/22-8/28 Sampled B P. Holder Alkalinity (Total CaC03) mg/I Aluminum, dissolved m /I Ammonia m /I Anions me /I Arsenic, dissolved m /I Arsenic, total m /I Bicarbonate m /I Boron, dissolved m /I Cadmium, dissolved m /I Calcium, dissolved m /I Carbonate m /I Cation - Anion Balance % Cations me /I Chloride m /I Conductivity mhos/cm 988.5 1 Copper, dissolved m /I Hardness m /I Hydroxide m /I Iron, dissolved m /1 0.053 0.01 Iron, total m /I 1.799 0.01 Lead, dissolved m /I Magnesium, dissolved m /l Manganese, dissolved m /I Manganese, total m /I Mercury, total m /I Molybdenum, dissolved m /I Nitrate/Nitrite as N m /I Nitrogen, ammonia m /I H SU 7.56 0.001 Phosphate m /I Phosphorus Ortho , dissolved m /I Potassium, dissolved m /I Selenium, dissolved m /I Selenium, total m /l Sodium Absorption Ratio SAR calc. Sodium, dissolved m /I Sulfate m /l TDS Ratio talc. TDS Calc. m /l TDS m /I 601 2 TSS m /I 30 2 Zinc, dissolved mg/I ' Baseline and WY 2000 data adapted from WWE (2001). 2 Enviro-Chem Analytical, Grand Junction, CO 3 Zero values denote readings below lab detection levels (MDL). G-3 West Elk Mine 2008 Annual Hydrology Report HydroGeo, Inc.