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Lower Sylvester Gulch <br />Surface Water Quality and Field Parameters <br />• <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location L. Sylvester Gulch Baseline 2009 Water Year <br /> <br />Description <br />Units <br />Minimum <br />Maximum <br />Mean <br />5/7/2009 <br />5/26/2009 <br />Q 4 5/26/2009 <br />(Duplicate) <br />Q 4 <br />8/10/2009 <br />Field Parameters <br /> <br />Flow <br />m <br />0.07 <br />0.07 <br />0.07 Not <br />Measured Not <br />Measured Not <br />Measured Not <br />Measured <br />Electrical Conductivity umhos/cm 620 700 653 777 823 823 908 <br />H SU 8.50 9.70 8.90 8.75 8.82 8.82 8.86 <br />Temperature °C °C 7.9 10.2 9 16.4 13.1 13.1 18.0 <br />Comment <br />Laboratory Parameters <br />Name of Certified Lab ACZ ACZ <br />Lab Reference # L76064-12 L76064-13 <br />Sample Date 5/26/2009 5/26/2009 <br />Lab Test Date 5/29-6/5 5/29-6/5 <br />Sampled B PH PH <br />Alkalinity otal 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 /l <br />Arsenic, total m /I 0.001 0.001 0.001 <br />Bicarbonate m /I 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 4 4 4 <br />Conductivity umhos/cm 597 597 597 801 813 <br />Copper, dissolved m /I 0.01 0.01 0.01 <br />Hardness m /I 179 179 179 <br />Hydroxide m /I 2 2 2 <br />Iron, dissolved m /I 0.05 0.05 0.05 -0.02 U 0.02 B <br />Iron, total m /I 0.17 0.17 0.17 8.03 8.35 <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 /l <br />Nitrate/Nitrite as N m /I 0.05 0.05 0.05 <br />Nitrite as N), dissolved m /I <br />H lab SU 8.3 8.3 8.3 8.8 H 8.8 H <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 2.2 <br />Selenium, dissolved m /I <br />Selenium, total m /I 0.04 0.04 0.04 <br />Sodium Absorption Ratio SAR calc. 2.89 2.69 2.89 <br />Sodium, dissolved m /l 87.8 87.8 87.8 <br />Sulfate m /I 70 70 70 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 400 430 410 490 480 <br />TSS m /I 5 120 74 188 106 <br />Zinc, dissolved mg/I 0.01 0.01 0.01 <br />'Baseline and WY 2000 data adapted from WWE (2001). <br />z ACZ Laboratory, Steamboat Springs, CO <br />7 Negative values denote readings below lab detection levels. <br />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 cone detected at a value bet method detection limit (MDL) and practical quantitation limit (PQL). <br />C-5 <br />West Elk Mine <br />2009 Annual Hydrology Report <br />HydroGeo, Inc.