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Lower Sylvester Gulch <br />Surface Water Quality and Field Parameters <br />• <br />is <br />0 H - Holding time exceeded; pH is a field test with an immediate hold time. <br />Mountain Coal West Elk Mine <br />Monitoring Location L. Sylvester Gulch Baseline' 2007 Water Year <br /> 5/23/2007 <br />Description Units Minimum Maximum Mean 4/26/2007 5/23/2007 Q' (Duplicate) Q' 8/23/2007 <br />Field Parameters <br /> <br /> Too high to Too high to Too high to Too high to <br />Flow m 0.07 0.07 0.07 measure measure measure measure <br />Electrical Conductivity umhos/cm 620 700 653 1325 2990 2990 3850 <br />H SU 8.50 9.70 8.90 8.60 8.97 8.97 8.70 <br />Temperature °C °C 7.9 10.2 9 14.1 11.6 11.6 19.4 <br />Temperature °F °F 46.2 50.4 48.2 57.4 52.9 52.9 66.9 <br /> <br /> Retest Retest <br /> pending Pending <br />Comment <br />Laboratory Parameters' <br />Name of Certified Lab z ACZ ACZ <br /> <br />Lab Reference # L62831-08 L62831-09 <br /> 5/23/2007 5/23/2007 <br />Sample Date 5/29-6/8 5/29-6/8 <br />Lab Test Date <br />Sampled B <br />Alkalinity 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 /I 315 315 315 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I 0.003 0003 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 />m <br />h <br />/ 4 <br />597 4 <br />597 4 <br />597 <br />3050 <br />3040 <br />Conductivity os <br />c <br />um <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 />0.05 2 <br />0.05 2 <br />0.05 <br />16.60 <br />0.39 <br />Iron, dissolved m /I 0.17 0.17 1.17 55.60 80.60 <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 />J <br />Nitrite as N), dissolved m /I <br />SU <br />3 <br />8 <br />8 <br />3 <br />8.3 <br />9.0 <br />H <br />o <br />H <br />H lab . . <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 talc. 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 />1890 <br />3710 <br />TDS <br />SS m /I 5 120 74 2890 H 3990 H <br />T <br />Zinc, dissolved mg/I 0.01 0.01 0.011 - <br />'Baseline and WY 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 - Analyte was analyzed for but not detected at the indicated MDL <br /> <br />B - Analyte conc detected at a value bet method detection limit (MDL) and practical quantitation limit (PQL). <br />West Elk Mine <br />C-5 2007 Annual Hydrology Report <br />HydroGeo, Inc.