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Upper North Fork (USGS) <br />Surface Water Quality and Field Parameters <br />• <br />• <br />C-1 <br />Mountain Coal West Elk Mine <br />Monitoring Location: N. Fork Up per (USGS) Baseline 2009 Water Year <br /> <br />Description <br />Units <br />Minimum <br />Maximum <br />Mean <br />5/7/2009 <br />612/2009 <br />Q° 16/2/2009 <br />(Duplicate) <br />Q° <br />8/10/2009 <br />0° <br />Field Parameters <br />Flow staff gauge -4.6 -3.7 -3.7 2.28 <br />Electrical Conductivity umhos/cm 129 ill ill 171 <br />H SU 8.49 8.25 8.25 8.53 <br />Temperature (°C) °C 10.3 8.6 8.6 15.5 <br />Comment <br />Laboratory Parameters 3 <br />Name of Certified Lab ACZ ACZ ACZ <br />Lab Reference # L76166-02 L76166-04 L77413-09 <br />Sample Date 6/2/2009 6/2/2009 8/10/2009 <br />Lab Test Date 6/3-6/12 6/3-6/12 8/11-8/24 <br />Sampled B PH PH PH <br />Alkalinity Total CaC03 m /1 44 44 72 <br />Aluminum, dissolved m /I -0.03 U 0.05 B -0.03 U <br />Anions <br />/I <br />me <br />0.9 <br />0.9 <br />1.5 <br /> <br />Arsenic, total m <br />/I <br />0.001 <br />0.001 <br />0.001 <br />-0.0005 <br />U <br />-0.0005 <br />U <br />-0.0005 <br />U <br />Bicarbonate m /I 40.9 167 81.3 44 44 70 <br />Boron, dissolved m /I -0.01 U -0.01 U -0.01 U <br />Cadmium, dissolved m /1 -0.005 U -0.005 U -0.005 U <br /> <br />Calcium, dissolved <br />/I <br />m <br />12.9 <br />13.1 <br />20.9 <br />Carbonate m /I -2 U -2 U -2 U <br />Cation-Anion Balance % 0 0 3.2 <br />Cations me 11 0.9 0.9 1.6 <br />Chloride m /I 10 3 -1 U -1 U 1 B <br />Chromium, total I -0.01 U -0.01 U -0.01 U <br />Conductivity umhos/ <br />cm 76 241 169 95 95 146 <br />Co er, dissolved 0.01 0.01 0.01 -0.01 U -0.01 U -0.01 U <br />C anide, total N <br />E -0.003 U -0.003 U -0.003 U <br />Hardness 40 107 70 41 41 66 <br />H droxide -2 U -2 U -2 U <br />Iron, dissolved I 0.38 0.09 0.02 B 0.03 B 0.04 B <br />Iron, total m /I 26.3 1.6 1.34 1.57 0.53 <br />Lead, dissolved m /I 0.02 0.01 -0.04 U -0.04 U -0.04 U <br />Magnesium, dissolved m /I 2 3.4 2.9 2.0 2.0 3.4 <br />Manganese, dissolved m /l 0.009 0.006 -0.005 U -0.005 U -0.005 U <br />Manganese, total m /I 0.19 0.04 0.022 B 0.026 B 0.011 B <br />Mercury, total m /I -0.0002 U -0.0002 U -0.0002 U <br />Molybdenum, dissolved -0.01 U -0.01 U -0.01 U <br />Nickel, total " -0.01 U -0.01 U -0.01 U <br />Nitrate/Nitrite as N M 0.19 0.06 0.07 B 0.05 B -0.02 U <br />H lab i 6.7 9 7.9 8.1 H 8.1 H 8.4 H <br />Phosphate l -0.03 U -0.03 U 0.06 B <br />Phosphorus Ortho , dissolved 1.61 0.12 -0.01 UH -0.01 UH 0.02 B <br />Potassium, dissolved mg/Al 0.6 B 0.6 B 0.8 B <br />Selenium, total m /I 0.0001 B 0.0002 B 0.0002 8 <br />Silver, total m /I -0.00005 U -0.00005 U -0.00005 U <br />Sodium Absorption Ratio SAR talc. 0.2 1.62 0.5 0.23 0.23 0.33 <br />Sodium, dissolved m /I 3.4 5.7 4.6 3.4 3.4 6.2 <br />Sulfate m /I 70 10 3 B 3 B 4 B <br />TDS Ratio m /I 1.46 1.22 1.28 <br />TDS Calc. calc. 48 B 49 B 78 <br />TDS m /I 30 650 109 70 60 100 <br />TSS m /I 636 55 18 B 20 7 B <br />Zinc, dissolved mg/1 0.02 B 0.03 B 0.05 B <br />'Baseline and WY 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 />West Elk Mine <br />2009 Annual Hydrology Report Hydrogeo, Inc.