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Lower Deep Creek <br />Surface Water Quality and Field Parameters <br />• <br />0 <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location L. Deep Creek Baseline' 2007 Water Year <br /> <br />Description Units Minimum Maximum Mean 4/28/2007 5/29/2007 Q a 9/11/2007 <br />Field Parameters <br />Staff Gauge <br />N/A <br />N/A <br />N/A <br />Flow <br />Flow cfS 17.91 5.12 1.04 <br />Electrical Conductive umhos/cm 120 380 246 210 305 277 <br />H SU 8.10 8.80 8.50 8.32 8.15 8.07 <br />Temperature °C °C 0.1 16.4 10.0 4.2 7.7 6.6 <br />Temperature (°F OF 32.2 61.5 50.0 39.6 45.9 43.9 <br />Comment <br />Laboratory Parameters s <br /> <br />Name of Certified Lab ACz <br /> <br />Lab Reference # L62928-01 <br /> 5/29/2007 <br />Sample Date sl4-sl9 <br />Lab Test Date <br />Sampled B <br />Alkaline Total CaC03 m /I 61 183 12s <br />Aluminum, dissolved m /I 0.03 0.02 <br />Anions me /I 1.8 3.2 2.5 <br />Arsenic, Dissolved m /l <br />Arsenic, total m /I <br />Bicarbonate m /I 65 173 132 <br />Boron, dissolved m /I <br />Cadmium, dissolved m q/1 <br />Calcium, dissolved m /I 18.6 46.8 31.9 <br />Carbonate m /I 12 2 <br />Cation - Anion Balance % -6.7 -2.9 -4.8 <br />Cations me /I 1.7 2.8 2.25 <br />Chloride <br />Conductive m /I <br />umhos/cm <br />162 2 <br />270 1 <br />216 <br />251 <br />Copper, dissolved m /l <br />Hardness m /I 59 156 110 <br />Hydroxide <br />dissolved <br />Iron m /I <br />m /I <br />0.03 <br />0.43 <br />0.23 <br />-0.02 <br />U <br />, <br />Iron, total m /I 0.11 5.83 1.68 28.30 <br />Lead, dissolved m /I <br />Lead, total m /I <br />Magnesium, dissolved m /I 3.1 7.5 5.4 <br />Manganese, dissolved m /I 0.009 0.005 <br />Manganese, total m /I 0.16 0.04 <br />Mercury, total m /l <br />Molybdenum, dissolved m /I <br />Nitrate as N), dissolved m /I <br />Nitrate/Nitrite as N m /I 0.10 0.03 <br />Nitrite as N), dissolved m /I <br />8 <br />3 <br />H <br />H lab SU 6.5 8.20 7.4 . <br />Phosphate m /I 0.08 0.09 0.09 <br />Phosphorus Ortho , dissolved m /I 0.32 0.007 <br />Potassium, dissolved m /I 0.8 1.1 1.0 <br />Selenium, dissolved m q/1 <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR talc. 0.59 1.32 0.94 <br />Sodium, dissolved m /I 12.3 31.4 21.6 <br />Sulfate m /I 30 19 <br />TDS Ratio calc. <br />TDS Calc. m /l <br />m /I <br />90 <br />250 <br />165 <br />190 <br />TDS <br />TSS m /I 448 93 482 <br />Zinc, dissolved mg/I <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 />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 />HydroGeo, Inc. <br />C-16 2007 Annual Hydrology Report