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Spring G-24 <br />Water Qualitv and Field Parameters <br />• <br /> <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring G-24 Baseline' 2007Water Year <br />Description Units Minimum Maximum Mean 4/25/2007 5/30/2007 Q° 8/22/2007 <br />Field Parameters <br />Flow m 0.97 1.65 1.41 <br />Electrical Conductivity µmhos/cm 558 955 896 <br />H SU 7.10 7.13 7.06 <br />Temperature (°F OF 58.9 46.9 50.2 <br />Temerature °C °C <br />Comment <br />Laboratory ParameterS3 <br />Name of Certified Labe ACZ <br />Lab Reference # L63002-03 <br />Sample Date 5/3012007 <br />Lab Test Date 6/5-6/18 <br />Sampled B <br />Alkalinity (Total CaC03) mg/I <br />Aluminum, dissolved m /I 0.08 0.04 <br />Anions me /1 <br />Arsenic, dissolved m /I <br />Arsenic, total m /I 0.001 0.001 0.001 <br />Bicarbonate m /I 267 376 307 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I <br />Calcium, dissolved m /I 56.4 56.4 56.4 <br />Carbonate m /I <br />Cation - Anion Balance m /I <br />Cations me /I <br />Chloride m /I 1.2 10 4.4 <br />Conductivity µmhos/cm 550 564 557 867 <br />Copper, dissolved m /I <br />Hardness m /I 176 233 203 <br />Hydroxide m /I <br />Iron, dissolved m /I 0.1 0.03 0.31 <br />Iron, total m /I 2.28 0.45 1.15 <br />Lead, dissolved m /I <br />Magnesium, dissolved m /I 15.9 16.5 16.2 <br />Manganese, dissolved m /I 0.006 0.002 <br />Manganese, total m /I 0.048 0.005 <br />Mercury, total m /I <br />Molybdenum, dissolved m /I <br />Nitrate as N), dissolved m /I <br />Nitrate/Nitrite as N m /I 0.05 0.1 0.08 <br />Nitrite as N), dissolved m /I <br />H SU 7.2 8.3 7.9 7.9 H <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I 0.105 0.027 <br />Potassium, dissolved m /I <br />Selenium, dissolved m /I <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR calc. 1.8 1.8 1.8 <br />Sodium, dissolved m /I 58.9 58.9 58.9 <br />Sulfate m /I 21.2 70 30.5 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 214 520 , 362 520 <br />TSS m /I 102 21 -5 U <br />Zinc, dissolved mg/I <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 methoddetection limit (MDL) and practical quantitation limit (PQL). <br />West Elk Mine <br />E-11 2007 Annual Hydrology Report HydroGeo, Inc.