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Lower Gibble Gulch <br />Surface Water Quality and Field Parameters <br />• <br />• <br /> <br />Mountain Coal West Elk Mine <br />Monitoring Location L. Gribble Gulch Baseline 2007 Water Year <br />o <br />Description Units Minimum Maximum Mean 4/27/2007 5/24/2007 Q a 8/23/2007 <br />Field Parameters <br />13 <br />9 <br />12 <br />D <br />Flow <br />Electrical Conductivity m <br />umhos/cm . <br />888 859 <br />H SU 7.99 8.14 <br />Temperature °C <br />°C <br />7.4 <br />7.5 <br />Temperature °F OF 45.3 45.5 <br />Comment <br />Laboratory Parameters 3 <br />Name of Certified Lab 2 ACZ <br /> <br />Lab Reference # L62830-03 <br /> s/24/2007 <br />Sample Date 5/31-6/8 <br />Lab Test Date <br />Sampled B <br />Alkalinity Total CaC03 m /I <br />Aluminum, dissolved m /l <br />Anions me /I <br />Arsenic, dissolved m /I <br />Arsenic, total m /I <br />Bicarbonate m /I 304 477 353 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I <br />Calcium, dissolved m /I <br />Carbonate m /I <br />Cation - Anion Balance % <br />Cations me /I <br />Chloride <br />Conductivity m /I <br />umhos/cm 3 <br />1250 5 <br />1250 4 <br />1250 <br />845 <br />Copper, dissolved m /I <br />Hardness m /I 308 460 371 <br />Hydroxide m /I <br />0 <br />10 <br />Iron, dissolved m /I <br />m /I <br />0.89 <br />0.44 . <br />1.42 <br />Iron, total <br />Lead, dissolved m /I <br />Lead, total m /I <br />- <br />- <br />- <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 />Mercu , total m /I <br />Molybdenum, dissolved m /I <br />Nitrate as N m /I <br />Nitrate/Nitrite as N m /I 0.05 0.35 0.15 <br />Nitrite as N), dissolved m /I <br />8 <br />5 <br />H <br />H lab SU 7.2 7.2 7.2 . <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I 0.006 0.002 <br />Potassium, dissolved m /I <br />Selenium, dissolved m /I <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR calc. 0.86 2.5 1.5 <br />Sodium, dissolved rr1 /I 80 260 135 <br />Sulfate m /I 400 780 590 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />m /I 24 60 42 490 <br />TDS <br />94 <br /> <br />m /I <br />TSS <br />Zinc, dissolved mg/I <br />'Baseline and WY 2000 data adapted from WWE (2001). <br />z 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 2007 Annual Hydrology Report <br />HydroGeo, Inc.