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Spring G-7 <br />Wnfar r]ualifv and Fialrl Pnramafars <br />• <br /> <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring G-7 Baseline' 2007 Water Year <br />Description Units Minimum Maximum Mean 4/27/2007 5/30/2007 Qa 8/23/2007 <br />Field Parameters <br />Flow m 20.00 9.38 3.33 <br />Electrical Conductivity µmhos/cm 276 511 591 <br />H SU 7.77 7.58 7.83 <br />Temperature (°F) OF 56.2 44.4 48.6 <br />Temperature 0C 6.9 9.2 <br />Comment <br />Laboratory Parameter <br />Name of Certified La ACZ <br />Lab Reference # L63002-05 <br />Sample Date 5/30/2007 <br />Lab Test Date 6/5-6/18 <br />Sampled B <br />Alkalinity (Total CaCCQ mg/I <br />Aluminum, dissolved m /I 0.05 0.05 0.05 <br />Anions me /I <br />Arsenic, total m /I <br />Bicarbonate m /I 177 184 180.5 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I <br />Calcium, dissolved m /I 41.8 41.8 41.8 <br />Carbonate m /I <br />Cation - Anion Balance m /I <br />Cations me /I <br />Chloride m /I 1 0.5 <br />Conductivity µmhos/cm 387 414 400.5 452 <br />Copper, dissolved m /I <br />Hardness m /I 134 142 138 <br />Hydroxide m /I <br />Iron, dissolved m /I 0.04 0.07 0 0.04 B <br />Iron, total m /I 0.35 0.4 0.375 1.52 <br />Lead, dissolved m /I 0.02 0.01 <br />Lead, total m /I <br />Magnesium, dissolved m /I 6.8 7.2 7 <br />Manganese, dissolved m /I <br />Manganese, total m /I 0.005 0.006 0 <br />Mercury, total m /I <br />Molybdenum, dissolved m /I <br />Nitrate/Nitrite as N m /I 0.08 0.1 0.09 <br />H lab SU 7.8 8.1 7.95 8.1 H <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I 0.014 0.007 <br />Potassium, dissolved m /I <br />Selenium, dissolved m /I <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR calc. 1.54 1.63 1.6 <br />Sodium, dissolved m /I 42.8 42.8 42.8 <br />Sulfate m /I 40 50 45 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 230 230 230 280 <br />TSS m /I 10 30 20 24 <br />Zinc, dissolved 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 - 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 />E-9 <br />West Elk Mine <br />2007 Annual Hydrology Report <br />HydroGeo, Inc.