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Upper Dry Fork Alluvial Well <br />Water Quality and Field Parameters <br /> <br />• <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location: Upper Dry Fork Alluvial Well Baseline' 2009 Water Year <br /> <br />Description <br />Units <br />Minimum <br />Maximum <br />Means <br />5/9/2009 <br />6/4/2009 <br />8/9/2009 <br />Q° 8/9/2009 <br />(Duplicate) <br />Q4 <br />Field Parameters <br />Water Level Depth feet 13.6 13.76 15.20 15.20 <br />Electrical Conductivity mhos/cm 610 619 609 609 <br />H SU 7.80 7.77 7.85 7.85 <br />Temperature °C 8.3 9.2 10.0 10.0 <br />Comment <br />Laboratory Parameters <br />Name of Certified Labs ACZ ACZ <br />Lab Reference # L77413-14 L77413-13 <br />Sample Date 8/9/2009 8/9/2009 <br />Lab Test Date 8/11-8114 8/11-8/14 <br />Sampled B PH PH <br />Alkalinity (Total CaCO3) mg/I 227 266 248 <br />Aluminum, dissolved m /I <br />Ammonia m /I <br />Anions me A 5.6 6.2 5.8 <br />Arsenic, dissolved m /I -0.0005 0.0006 0.0002 <br />Arsenic, total m /I <br />Bicarbonate m A 227 266 248 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I -0.005 -0.005 -0.005 <br />Calcium, dissolved m /I 3.2 5.1 3.7 <br />Carbonate m /I -2 -2 -2 <br />Cation - Anion Balance % 0.9 3.9 1.9 <br />Cations me /I 5.7 6.7 6.0 <br />Chloride m /I -1 6 4 <br />Conductivity mhos/cm 493 509 503 576 571 <br />Copper, dissolved m /I <br />Hardness m /I 10 16 12 <br />Hydroxide mg/I -2 -2 -2 <br />Iron, dissolved m /I 0.03 0.49 0.19 0.14 0.27 <br />Iron, total m A 1.3 25.9 13.6 0.50 0.64 <br />Lead, dissolved m /I -0.04 -0.04 -0.04 <br />Magnesium, dissolved m /I -0.2 0.7 0.4 <br />Manganese, dissolved 0.067 0.101 0.081 <br />Manganese, total 0.109 0.349 0.229 <br />Mercury, dissolved -0.0002 0.0015 0.0002 <br />Mercury, total M <br />Molybdenum, dissolved <br />Nitrate as N dissoloved <br />Nitrate/Nitrite as N mgA 0.04 0.87 0.16 <br /> <br />rite as N dissoloved <br />Nit <br />m /I <br />Nitrogen, ammonia m /I -0.05 0.20 0.10 <br />H SU 8.0 8.1 8.0 8.2 H 8.3 H <br />Phosphate m A 0.1 0.4 0.2 <br />Phosphorus Ortho , dissolved m A 0.03 0.13 0.06 <br />Potassium, dissolved m /I 0.9 2.7 1.8 <br />Selenium, dissolved m A -0.0010 0.0003 0.0003 <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR talc. 16 17 17 <br />Sodium, dissolved m /I 113 144 126 <br />Sulfate m /I 30 50 35 <br />TDS Ratio talc. 1 1 1 <br />TDS Calc. m A 313 313 313 <br />TDS m /I 290 390 326 360 370 <br />TSS m /I -5 U 8 B <br />Zinc, dissolved mgA -0.01 0.04 0.02 <br />Baseline 2004 <br />s ACZ Laboratory, Steamboat Springs, CO <br />' 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 quanlitation limit (PQL). <br />is Average mean value calc using 1 /2 of detection limit for readings below lab detection limits unless all readin s are below lab detection limit. <br />G-7 <br />West Elk Mine <br />2009 Annual Hydrology Report <br />HydroGeo, Inc.