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Spring G-25 <br />Water Quality and Field Parameters <br />• <br />• <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring G-25 Baseline' 2009 Water Year <br />Description Units Minimum Maximum Mean 5/7/2009 6/2/2009 Q ° 8/8/2009 <br />Field Parameters <br />Flow m 39.85 28.6 2.12 <br />Electrical Conductivity µmhos/cm 1762 1750 1767 <br />H SU 7.45 7.43 7.63 <br />Temperature (°C) °C 7.7 7.9 7.9 <br />Comment <br />Laboratory ParameterS3 <br />Name of Certified Lab ACZ <br />Lab Reference # 1-76196-12 <br />Sample Date 6/2/2009 <br />Lab Test Date 6/4-6/11 <br />Sampled B PH <br />Alkalinity (Total CaC03) mg/I <br />Aluminum, dissolved m /I <br />Anions me /I <br />Arsenic, dissolved m /I <br />Arsenic, total m /I <br />Bicarbonate m /l 224 828 573 <br />Boron, dissolved m /l <br />Cadmium, dissolved m /I <br />Calcium, total m /I <br />Calcium, dissolved m /l <br />Carbonate m /I <br />Cation - Anion Balance m /I <br />Cations me /1 <br />Chloride m /I 2 20 s <br />Conductivity µmhos/cm 777 1320 1134 1760 <br />Copper, dissolved m /I <br />Hardness m /l 219 1379 514 <br />Hydroxide m /I <br />Iron, dissolved m /l 0.135 0.022 -0.02 U <br />Iron, total m /I 0.99 0.09 -0.02 U <br />Lead, dissolved m /I 0.02 0.02 0.02 <br />Magnesium, dissolved m /I 70.9 70.9 70.9 <br />Manganese, dissolved m /I <br />Manganese, total m /I 0.01 0.002 <br />Mercury, total m /l <br />Molybdenum, dissolved m /I <br />Nitrate as N m /I <br />Nitrate/Nitrite as N m /I 0.19 1.22 0.4 <br />Nitrite as N m /I <br />H SU 6.85 8.5 7.44 8.4 H <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I 1.55 0.09 <br />Potassium, dissolved m /I <br />Selenium, dissolved m /I <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR calc. 0.49 3.8 2.2 <br />Sodium, dissolved m /l <br />Sulfate m /I 88 325 242 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 336 1170 843 1170 <br />TSS m /l 26 7 -5 U <br />Zinc, dissolved m /I <br />Zinc, total mg/l <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 (PQL). <br />West Elk Mine <br />E-25 2009 Annual Hydrology Report HydroGeo, Inc.