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Spring G-24 <br />Water Quality and Field Parameters <br />• <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring G-24 Baseline' 2009 Water Year <br />Description Units Minimum Maximum Mean 517/2009 5/24/2009 Q4 8/10/2009 <br />Field Parameters <br />Flow m 7.56 9.12 4.04 <br />Electrical Conductivity mhos/cm 878 838 816 <br />H SU 6.93 7.35 7.39 <br />Temerature °C °C 8.4 8.2 8.6 <br />Comment <br />Laboratory Parameters' <br />Name of Certified Labe ACZ <br />Lab Reference # L76064-03 <br />Sample Date 5/24/2009 <br />Lab Test Date 5/29-6/5 <br />Sampled B PH <br />Alkalinity (Total CaC03) mg/I <br />Aluminum, dissolved m /I 0.08 0.04 <br />Anions me /I <br />Arsenic, dissolved m /I <br />Arsenic, total m /I 0.001 0.001 0.001 <br />Bicarbonate m /I 267 376 307 <br />Boron, dissolved m /l <br />Cadmium, dissolved m /I <br />Calcium, dissolved m /I 56.4 56.4 56.4 <br />Carbonate m /I <br />Cation - Anion Balance m /I <br />Cations me /I <br />Chloride m /I 1.2 10 4.4 <br />Conductivity mhos/cm 550 564 557 810 <br />.Copper, dissolved m /I <br />Hardness m /I 176, 233 203 <br />Hydroxide m /I <br />. <br />Iron, dissolved m /I 0.1 0.03 0.03 B <br />Iron, total m /I 2.28 0.45 0.13 <br />Lead, dissolved m /I <br />Magnesium, dissolved m /I 15.9 16.5 16.2 <br />Manganese, dissolved m /I 0.006 0.002 <br />Manganese, total m /I 0.048 0.005 <br />Mercury, total m /I <br />Molybdenum, dissolved m /I <br />Nitrate as N), dissolved m /I <br />Nitrate/Nitrite as N m /I 0.05 0.1 0.08 <br />Nitrite as N), dissolved m /I <br />H SU 7.2 8.3 7.9 8.3 H <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I 0.105 0.027 <br />Potassium, dissolved m /I <br />Selenium, dissolved m /I <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR calc. 1.8 1.8 1.8 <br />Sodium, dissolved m /I 58.9 58.9 58.9 <br />Sulfate m /I 21.2 70 30.5 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 2141 i 520 362 460 <br />TSS 411 102 21 5 B <br />Zinc, dissolved mg/I <br />' Baseline pre -2000 data, adapted from WVNE (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 />West Elk Mine <br />E-11 2009 Annual Hydrology Report HydroGeo, Inc.