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Lower Gibble Gulch <br />Surface Water Quality and Field Parameters <br />• <br /> <br />Mountain Coal West Elk Mine <br />Monitoring Location L. Gribble Gulch Baseline 2009 Water Year <br />Description Units Minimum Maximum Mean 5/7/2009 6/212009 Q 4 8/8/2009 <br />Field Parameters <br />Flow m 56.93 28.55 D <br />Electrical Conductivity umhos/cm 780 777 <br />H SU 8.49 8.54 <br />Temperature °C) °C 12.0 13.2 <br />Comment <br />Laboratory Parameters 3 <br />Name of Certified Lab 2 ACZ <br />Lab Reference # L76196-10 <br />Sample Date 6/2/2009 <br />Lab Test Date 6/4-6/11 <br />Sampled B PH <br />Alkalinity (Total CaC03 m /I <br />Aluminum, dissolved m /l <br />Anions me /I <br />Arsenic, dissolved m /I <br />Arsenic, total m /l <br />Bicarbonate m /I 304 477 353 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /l <br />Calcium, dissolved m /I <br />Carbonate m /l <br />Cation -Anion Balance % <br />Cations me /I <br />Chloride m /I 3 5 4 <br />Conductivity umhos/cm 1250 1250 1250 746 <br />Copper, dissolved m /l <br />Hardness m /I 308 460 371 <br />Hydroxide m /I <br />Iron, dissolved m /I -0.02 U <br />Iron, total m /I 0.89 0.44 1.5 <br />Lead, dissolved m /I <br />Lead, total m /I <br />Magnesium, dissolved m /I 32 39.7 35.9 <br />Manganese, dissolved m /I <br />Manganese, total m /I 0.015 0.008 <br />Mercury, total m /I <br />Molybdenum, dissolved m /I <br />Nitrate as N m /l <br />Nitrate/Nitrite as N m /I 0.05 0.35 0.15 <br />Nitrite as N), dissolved m /l <br />pH lab SU 7.2 7.2 7.2 8.6 H <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m q/1 0.006 0.002 <br />Potassium, dissolved m /I <br />Selenium, dissolved m /l <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR calc. 0.86 2.5 1.5 <br />Sodium, dissolved m /I 80 260 135 <br />Sulfate m /I 400 780 590 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 24 60 42 470 <br />TSS m /I 191 B <br />Zinc, dissolved mg/I <br />r 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 />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 />C-12 2009 Annual Hydrology Report HydroGeo, Inc.