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Spring G-35 <br />Water Quality and Field Parameters <br />• <br />• <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring G-35 Baseline' 2009 Water Year <br />Description Units Minimum Maximum Mean 517/2009 6/2/2009 Q a 8/8/2009 <br />Field Parameters <br />Flow m 5.05 3.08 See <br />Electrical Conductivity mhos/cm 1172 1195 1294 <br />H SU 7.41 7.72 7.86 <br />Temperature (°C) °C 7.2 10.8 12.9 <br />Comment <br />Laboratory ParameterS3 <br />Name of Certified Labe ACZ <br />Lab Reference # L76196-15 <br />Sample Date 6/2/2009 <br />Lab Test Date 6/4-6/11 <br />Sampled B PH <br />Alkalinity (Total CaC03) mg/I <br />Aluminum, dissolved m /I 0.04 0.04 0.04 <br />Anions me /l <br />Arsenic, dissolved m /l <br />Arsenic, total m /I <br />Bicarbonate m /I 313 440 363.6 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I <br />Calcium, total m /I <br />Calcium, dissolved m /l <br />Carbonate m /I <br />Cation -Anion Balance m /I <br />Cations me /1 <br />Chloride m /l 2 14 10.4 <br />Conductivity mhos/cm 1030 1130 1080 1170 <br />Copper, dissolved m /I <br />Hardness m /l 234 586 439 <br />Hydroxide m /l <br />Iron, dissolved m /l 0.02 0.03 0.025 -0.02 U <br />Iron, total m /I 0.02 1.2 0.28 0.17 <br />Lead, dissolved m /I <br />Magnesium, dissolved m /I 65.4 65.4 65.4 <br />Manganese, dissolved m /I <br />Manganese, total m /I 0.07 0.01 <br />Mercury, total m /I <br />Molybdenum, dissolved m /I <br />Nitrate as N m /l <br />Nitrate/Nitrite as N m /l 0.28 0.53 0.394 <br />Nitrite (as N m /I <br />H SU 7.7 7.8 7.75 8.3 H <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I <br />Potassium, dissolved m /I <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR talc. 0.91 0.92 0.915 <br />Sodium, dissolved m /I <br />Sulfate m /l 224 284 255.6 <br />TDS Ratio talc. <br />TDS Calc. m /I <br />TDS m /l 598 974 731 740 <br />TSS m /l 16 a -5 U <br />Zinc, dissolved m /I <br />Zinc, total 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 method detection limit (MDL) and practical quantitation limit (PQL). <br />West Elk Mine <br />E-26 2009 Annual Hydrology Report HydroGeo, Inc.