2009-07-01_REPORT - C1980007 (8)

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Spring 26-1 Water Quality and Field Parameters 0 • Mountain Coal West Elk Mine Monitoring Location Spring 26-1 Baseline' 2008 Water Year Description Units Minimum Maximum Mean 5/11/2008 6/8/2008 8/21/2008 Field Parameters Flow m 320 82 7.4 Electrical Conductivity µmhos/cm 240 640 482 444 645 813 H SU 7.3 8.1 7.7 7.30 7.73 7.83 Temperature OC 7.0 6.5 7.6 Comment Laboratory Parameters3 Name of Certified Labz Enviro-Chem Lab Reference # 08/941 Sample Date 6/8/2008 Lab Test Date 6/9-7/3 Sampled B P. Holder Alkalinity (Total CaC03) mg/I 151 284 222 Aluminum, dissolved m /l Anions me /I 5.1 5.9 5.5 Arsenic, dissolved m /I Arsenic, total m /I Bicarbonate m /I 151 284 222 Boron, dissolved m /l Cadmium, dissolved m /I Calcium, dissolved m /I 24 37.2 31.5 Carbonate m /I Cation - Anion Balance % 1 3.3 2.15 Cations me /I 5.2 6.3 5.75 Chloride m /I 2 6 4.4 Conductivity µmhos/cm 480 548 514 538.41 Copper, dissolved m /I Hardness m /I 81 126 105 Hydroxide m /I Iron, dissolved m /I 0.04 Iron, total m /l 1.45 0.24 0.46 Lead, dissolved m /l Magnesium, dissolved m /I 5.1 8 6.7 Manganese, dissolved m /I Manganese, total m /I 0.028 0.004 Mercury, total m /I Molybdenum, dissolved m /I Nitrate as N), dissolved m q/1 Nitrate/Nitrite as N m /l 0.14 0.31 0.19 Nitrite as N), dissolved m /I H SU 7.1 7.7 7.4 7.44 Phosphate m /l Phosphorus Ortho , dissolved m /I 0.007 0.001 Potassium, dissolved m /I 1.2 1.4 1.3 Selenium, dissolved m /I Selenium, total m /l 0.001 0.001 Sodium Absorption Ratio SAR calc. 2.8 4.96 3.96 Sodium, dissolved m /I 57.2 125 94.5 Sulfate M CI/[ 40 80 63.1 TDS Ratio calc. TDS Calc. m /l TDS m /I 220 410 327 398 TSS m /I 16 4 5 Zinc, dissolved mg/I 0.02 0.01 Baseline pre -2000 data, adapted from WWE (2001) Z Enviro-Chem Analytical, Grand Junction, CO West Elk Mine E-6 2008 Annual Hydrology Report HydroGeo, Inc.