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Spring 13-4 <br />Water Quality and Field Parameters <br />• <br />• <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring 13-4 Baseline' 2009 Water Year <br />Description Units Minimum Maximum Mean 5/6/2009 5/26/2009 Qa 8/8/2009 <br />Field Parameters <br />Flow m 37.71 2.76 D <br />Electrical Conductivity limhos/cm 336 447 <br />H SU 7.97 8.23 <br />Temperature OC 5.5 6.2 <br />Comment <br />Laboratory Parameters' <br />Name of Certified Labe ACZ <br />Lab Reference # L76041-07 <br />Sample Date 5/26/2009 <br />Lab Test Date 5127-6/9 <br />Sampled B PH <br />AlKalinity o u a 3 mg 109 <br />Aluminum, dissolved m /I -0.03 U <br />Anions me /1 4.2 <br />Arsenic, dissolved m /I <br />Arsenic, total m /I -0.0005 U <br />Bicarbonate m /I 105 <br />Boron, dissolved m /I -0.01 U <br />Cadmium, dissolved m /I -0.005 U <br />Calcium, dissolved m /I 45.7 <br />Carbonate m /I 4 B <br />Cation - Anion Balance m /I 1.2 <br />Cations me /I 4.3 <br />Chloride m /I 2 B <br />Conductivity µmhos/Cm 417 <br />Copper, dissolved m /I -0.01 U <br />Hardness m /I 159 <br />Hydroxide m /l -2 U <br />Iron, dissolved m /l -0.02 U <br />Iron, total m /I 0.02 B <br />Lead, dissolved m /I -0.04 U <br />Magnesium, dissolved m /I 11.0 <br />Manganese, dissolved m /I -0.005 U <br />Manganese, total m /I -0.005 U <br />Mercury, total m /I -0.0002 U <br />Molybdenum, dissolved m /I -0.01 U <br />Nitrate as N), dissolved m /I <br />Nitrate/Nitrite as N m /I -0.02 U <br />Nitrite as N), dissolved m /I <br />H SU 8.4 H <br />Phosphate m /I -0.03 U <br />Phosphorus Ortho , dissolved m /I -0.01 U <br />Potassium, dissolved m /I 1.5 B <br />Selenium, total m q/1 0.0001 B <br />Sodium Absorption Ratio SAR talc. 0.88 <br />Sodium, dissolved m /I 25.3 <br />Sulfate m /l 951 1 <br />TDS Ratio calc. 1.25 <br />TDS Calc. m /I 248 <br />TDS m /I 310 <br />TSS m /l -5 U <br />Zinc, dissolved mg/I -0.01 U <br />Baseline pre -2000 data, adapted from VVVVE (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 - Analvte conc detected at a value bet method detection limit (MDL) and practical quantitation limit (PQL). <br />West Elk Mine <br />E-5 2009 Annual Hydrology Report HydroGeo, Inc.