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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 2007 Water Year <br />Description Units Minimum Maximum Mean 4/27/2007 5/24/2007 Q 4 8/23/2007 <br />Field Parameters <br />Flow m 2.11 1.62 See <br />Electrical Conductivity µmhos/cm 1124 1305 1361 <br />H SU 8.00 7.46 7.54 <br />Temperature (°F) OF 60.3 42.1 61.9 <br />Temperature (°C) °C 15.7 5.6 16.6 <br />Comment <br />Laboratory Parameters <br />Name of Certified Lab ACZ <br />Lab Reference # L62830-07 <br />Sample Date 5/24/2007 <br />Lab Test Date 5/29-6/8 <br />Sampled B <br />Alkalinity (Total CaCO3) mg/I <br />Aluminum, dissolved m /I 0.04 0.04 0.04 <br />Anions me /I <br />Arsenic, dissolved m /I <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 /I <br />Carbonate m /I <br />Cation - Anion Balance m /I <br />Cations me /I <br />Chloride m /I 2 14 10.4 <br />Conductivity µmhos/cm 1030 1130 1080 1270 <br />Copper, dissolved m /I <br />Hardness m /I 234 586 439 <br />Hydroxide m /I <br />Iron, dissolved m /I 0.02 0.03 0.025 -0.02 U <br />Iron, total m /I 0.02 1.2 0.28 0.28 <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 /I <br />Nitrate/Nitrite as N m /I 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 /I 224 284 255.6 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 598 974 731 820 <br />TSS m /I 16 8 50 <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 />° ACZ Lab Qualifiers: U -Ana lyte 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 <br />West Elk Mine <br />E-26 2007 Annual Hydrology Report HydroGeo, Inc.