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Spring 13-2 <br />Water Qualitv and Field Parameters <br />• <br />U <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring 13-2 Baseline' 2007 Water Year <br />Description Units Minimum Maximum Mean 4/26/2007 5/23/2007 Q< 8/24/2007 <br />Field Parameters <br />Flow m 7.50 7.14 See <br />Electrical Conductivity µmhos/cm 294 456 329 <br />H SU 6.92 7.66 7.42 <br />Temperature OF 45.3 42.6 52.5 <br />Temperature °C 5.9 11.4 <br />Comment <br />Laboratory ParameterS3 <br />Name of Certified Labe ACZ <br />Lab Reference # L62831-04 <br />Sample Date 2/23/2007 <br />Lab Test Date 5/25-6/14 <br />Sampled B <br />Alkalinity (Total CaC03) mg/I 159 <br />Aluminum, dissolved m /I 0.03 B <br />Anions me /I 4.2 <br />Arsenic, dissolved m /I <br />Arsenic, total m /I -0.0005 U <br />Bicarbonate m /I 159 <br />Boron, dissolved m /I 0.02 B <br />Cadmium, dissolved m /I -0.005 U <br />Calcium, dissolved m /I 50.6 <br />Carbonate m /I -2 U <br />Cation - Anion Balance m /I 8.7 <br />Cations me /I 5.0 <br />Chloride m /I 2 B <br />Conductivity µmhos/cm 441 <br />Copper, dissolved m /I -0.01 U <br />Hardness m /I 174 <br />Hydroxide m /I -2 U <br />Iron, dissolved m /I -0.02 U <br />Iron, total m /I -0.02 U <br />Lead, dissolved m /I -0.04 U <br />Magnesium, dissolved m /I 11.5 <br />Manganese, dissolved m /I -0.005 U <br />Manganese, total m /I -0.005 U <br />Mercury, total m /I -0.0002 U <br />Molybdenum, dissolved m /I -0.01 U <br />Nitrate as N), dissolved m /I <br />Nitrate/Nitrite as N m /I 0.06 B <br />Nitrite as N), dissolved m /I <br />H SU 8.0 H <br />Phosphate m /I 0.03 B <br />Phosphorus Ortho , dissolved m /I 0.01 H,B <br />Potassium, dissolved m /I 1.4 B <br />Selenium, total m /I -0.001 U <br />Sodium Absorption Ratio SAR talc. 1.14 <br />Sodium, dissolved m /I 34.0 <br />Sulfate m /I 50 <br />TDS Ratio calc. 1.06 <br />TDS Calc. m /I 245 <br />TDS m /I 260 <br />TSS m /I -5 U,H <br />Zinc, dissolved mg/I 0.04 B <br />Baseline pre -2000 data, adapted from WWE (2001) <br />2 ACZ Laboratory , Steamboat Springs, CO <br />3 Negative values denote readings below lab detection levels <br />4 ACZ Lab Qualifiers: U - Analyte was analyzed for but not detected at the indicated MDL <br />H - Holding time exceeded; pH is a field test with an immediate hold time. <br />B - Analyte conc detected at a value bet method detection limit (MDL) and practical quantitation limit (PQL). <br />West Elk Mine <br />E-3 2007 Annual Hydrology Report HydroGeo, Inc.