2010-06-30_REPORT - C1980007 (7)

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Spring 11-2 Water Quality and Field Parameters is • Mountain Coal West Elk Mine Monitoring Location Spring 11-2 Baseline' 2009 Water Year Description Units Minimum Maximum Mean 5/7/2009 5/24/2009 Q 8/12/2010 Field Parameters Flow m -10 0.75 Trickle Electrical Conductivity mhos/cm 1612 1642 2240 H SU 8.29 8.25 8.53 Temerature °C °C 8.4 13.2 28.8 Comment Laboratory Parameters' Name of Certified Labe ACZ Lab Reference # L76064-01 Sample Date 5/24/2009 Lab Test Date 5/29-6/5 Sampled B PH Alkalinity (Total CaC03) mg/I Aluminum, dissolved m /I Anions me /I Arsenic, dissolved mg/1 Arsenic, total m /I Bicarbonate m /I 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 Conductivity mhos/cm 1640 Copper, dissolved m /I Hardness m /I Hydroxide m /I Iron, dissolved m /I -0.02 U Iron, total m /I 1.53 Lead, dissolved m /I Magnesium, dissolved m /I Manganese, dissolved m /I Manganese, total m /I Mercury, total m /I Molybdenum, dissolved m /I Nitrate as N m /I Nitrate/Nitrite as N m /l Nitrite as N m /l pH SU 8.7 H Phosphate m /I Phosphorus Ortho , dissolved m /I Potassium, dissolved m /I Selenium, total m /I Sodium Absorption Ratio SAR calc. Sodium, dissolved m /I Sulfate m /I TDS Ratio calc. TDS Calc. m /I TDS m /I 1100 TSS m /I 17 B Zinc, dissolved m /I Zinc, total mg/I ' Baseline pre -2000 data, adapted from WWE (2001) 2 ACZ Laboratory, Steamboat Springs, CO 3 Negative values denote readings below lab detection levels. ACZ Lab Qualifiers: U - Analyte was analyzed for but not detected at the indicated MDL. H - Holding time exceeded; pH is a field test with an immediate hold time. B - Analyte conc detected at a value bet method detection limit (MDL) and practical quantitation limit (PQL). West Elk Mine E-14 2009 Annual Hydrology Report HydroGeo, Inc.