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Lower Sylvester Gulch <br />Surface Water Quality and Field Parameters <br />• <br />u <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location L. Sylvester Gulch Baseline' 2008 Water Year <br />6/2/2008 <br />Description Units Minimum Maximum Mean 5/9/2008 612/2008 (Duplicate) 8/23/2008 <br />Field Parameters <br /> <br /> Too high to Too high to Too high to Too high to <br /> m 0.07 0.07 0.07 measure measure measure measure <br />Flow <br />Electrical Conductive umhos/cm 620 700 653 692 760 730 987 <br />H SU 8,50 9.70 8.90 8.27 8.71 8.71 8.78 <br />Temperature (°C) °C 7.9 10.2 9 12.0 18.0 18.0 17.5 <br />Comment <br />Laboratory Parameters' <br />Enviro- <br />Enviro- <br />2 Chem Chem <br />Name of Certified Lab <br /> <br /> 08/830 08/831 <br />Lab Reference # 6/2/2008 612/2008 <br />Sample Date <br />6/9-6/10 <br />6/9-6/10 <br />Lab Test Date P. Holder P. Holder <br />Sampled B <br />Alkaline Total CaC03 m /I 323 323 323 <br />Aluminum, dissolved m /I 0.03 0.03 0.03 <br />Anions me /I <br />Arsenic, dissolved m /I <br />Arsenic, total m /I 0.001 0.001 0.001 <br />Bicarbonate m /1 315 315 315 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I 0.003 0.003 0.003 <br />Calcium, dissolved m /I 41 41 41 <br />Carbonate m /I 8 8 8 <br />Cation -Anion Balance % -3.2 -3.2 -3.2 <br />Cations me /I 7.5 7.5 7.5 <br />Chloride m /I <br />/ <br />m <br />h 4 <br />597 4 <br />597 4 <br />597 <br />730.5 <br />730.34 <br />Conductive um <br />os <br />C <br />Copper, dissolved m /I 0.01 0.01 0.01 <br />Hardness m /I 179 179 179 <br />Hydroxide m /I <br />m /I 2 <br />05 <br />0 2 <br />0.05 2 <br />0.05 <br />0.025 <br />0.026 <br />Iron, dissolved m /I . <br />0.17 0.17 0.17 1.78 1.75 <br />Iron, total <br />Lead, dissolved m /I 0.04 0.04 0.04 <br />Lead, total m /I <br />Magnesium, dissolved m /I 18.7 18.7 18.7 <br />Manganese, dissolved m /I 0.007 0.007 0.007 <br />Manganese, total m /I 0.005 0.005 0.005 <br />Mercury, total m /I 0.0002 0.0002 0.0002 <br />Molybdenum, dissolved m /I 0.01 0.01 0.01 <br />Nitrate as N), dissolved m /I <br />Nitrate/Nitrite as N m /I 0.05 0.05 0.05 <br />Nitrite as N), dissolved m /I <br />8 <br />28 <br />28 <br />8 <br />H lab SU 8.3 8.3 8.3 . . <br />Phosphate m /I 0.09 0.09 0.09 <br />Phosphorus Ortho , dissolved m /I 0.031 0.031 0.031 <br />Potassium, dissolved m /I 2.2 2.2 22 <br />Selenium, dissolved m /I <br />Selenium, total m /I 0.04 0.04 0.04 <br />Sodium Absorption Ratio SAR calc. 2.89 2.89 2.89 <br />Sodium, dissolved m /I 87.8 87.8 87.8 <br />Sulfate m /I 70 70 70 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />m /I <br />400 <br />430 <br />410 <br />4 <br />472 <br />TDS <br />TSS m /I 5 120 74 1771 1 173 <br />Zinc, dissolved mg/I 0.01 0.01 0.01 <br />'Baseline and WY 2000 data adapted from WWE (2001). <br />2 Enviro-Chem Analytical, Grand Junction, CO <br />'Zero values denote readings below lab detection levels (MDL). <br />C-5 <br />West Elk Mine <br />2008 Annual Hydrology Report <br />HydroGeo, Inc.