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Spring G-28A <br />Water Qualitv and Field Parameters <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring G-28A Baseline' 2007 Water Year <br />Description Units Minimum Maximum Mean 4/27/2007 5/24/2007 Q4 8/23/2007 <br />Field Parameters <br />Flow m 0.66 1.30 -1 <br />Electrical Conductivity µmhos/cm 1121 1129 1125 <br />H SU 7.34 7.40 7.10 <br />Temperature (°F) OF 46.4 44.1 66.2 <br />Temperature CC) °C 8.0 6.7 19 <br />Comment <br />Laboratory Parameters <br />Name of Certified Lab ACZ <br />Lab Reference # L62830-08 <br />Sample Date 5/24/2007 <br />Lab Test Date 5/29-6/8 <br />Sampled B <br />Alkalinity (Total CaCQ) mg/l <br />Aluminum, dissolved m /I <br />Anions me /I <br />Arsenic, dissolved m /I <br />Arsenic, total m /I <br />Bicarbonate mg/I 338 400 367.4 <br />Boron, dissolved mg/I <br />Cadmium, dissolved mg/I <br />Calcium, dissolved mg/I <br />Carbonate m /I <br />Cation - Anion Balance mg/I <br />Cations me /I <br />Chloride m /I 5 10 6 <br />Conductivity µmhos/cm 1600 1600 1600, 1110 <br />Copper, dissolved mg/I <br />Hardness mg/I 162 654 338 <br />Hydroxide Mg/l <br />Iron, dissolved m /I 0.05 <br />Iron, total m /I 0.06 1.12 0.526 0.40 <br />Lead, dissolved m /I <br />Magnesium, dissolved mg/I <br />Manganese, dissolved mg/I <br />Manganese, total m /I 0.02 0 <br />Mercury, total m /I <br />Molybdenum, dissolved mg/I <br />Nitrate (as N), dissolved m /I <br />Nitrate/Nitrite as N) m /I 0.21 0.132 <br />Nitrite as N), dissolved m /I <br />H SU 7.9 7.9 7.9 8.3 H <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I <br />Potassium, dissolved mg/I <br />Selenium, total m /I <br />Sodium Absorption Ratio (SAR calc. <br />Sodium, dissolved m /I <br />Sulfate mg/I 64 550 166.8 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 420 1100 581 640, <br />TSS mg/I 301 1 <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 />4 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 <br />West Elk Mine <br />E-22 2007 Annual Hydrology Report HydroGeo, Inc.