2009-07-01_REPORT - C1980007 (8)

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Spring G-35 Water Quality and Field Parameters • • Mountain Coal West Elk Mine Monitoring Location Spring G-35 Baseline' 2008 Water Year Descri tion Units Minimum Maximum Mean 517/2008 6/912008 Enviro- Chem MDL 8/24/2008 Field Parameters Flow m 26.3 14.6 Trickle Electrical Conductivity µmhos/cm 1094 1081 1332 H SU 7.16 7.49 7.75 Temperature (C) °C 9.5 7.4 10.2 Comment Laboratory Parameters' Name of Certified La Enviro-Chem Lab Reference # 08/968 Sample Date 6/9/2008 Lab Test Date 6/9-6/13 Sampled By I P. Holder Alkalinity (Total CaCO3) mg/I Aluminum, dissolved m /I 0.04 0.04 0.04 Anions me /I Arsenic, dissolved m /I Arsenic, total m /I Bicarbonate m /I 313 440 363.6 Boron, dissolved m /I Cadmium, dissolved m /I Calcium, total m /I Calcium, dissolved m /I Carbonate m /I Cation - Anion Balance m /I Cations me /I Chloride m /I 2 14 10.4 Conductivity µmhos/cm 1030 1130 1080 974.1 1 Copper, dissolved m /I Hardness m /I 234 586 439 Hydroxide m /I Iron, dissolved m /I 0.02 0.03 0.025 0.03 0.01 Iron, total m /I 0.02 1.2 0.28 0.48 0.01 Lead, dissolved m /I Magnesium, dissolved m /I 65.4 65.4 65.4 Manganese, dissolved m /I Manganese, total m /I 0.07 0.01 Mercury, total m /I Molybdenum, dissolved m /I Nitrate as N m /I Nitrate/Nitrite as N m /I 0.28 0.53 0.394 Nitrite as N m /I H SU 7.7 7.8 7.75 7.37 0.1 Phosphate m /I Phosphorus Ortho , dissolved m /I Potassium, dissolved m /I Selenium, total m /I Sodium Absorption Ratio SAR calc. 0.91 0.92 0.915 Sodium, dissolved m /I Sulfate m /I 224 284 255.6 TDS Ratio calc. TDS Calc. m /I TDS m /I 598 974 731 687 2 TSS m /I 16 8 B 2 Zinc, dissolved m /I Zinc, total mg/I Baseline pre -2000 data, adapted from WWE (2001) 2 Enviro-Chem Analytical, Grand Junction, CO a B values denote readings above zero but below lab detection levels (MDL). Enviro-Chem TDS Ratio calculation is [(TDS - TDS (Calc.)) / TDS)] ` 100 West Elk Mine E-26 2008 Annual Hydrology Report HydroGeo, Inc.