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Lower Deep Creek <br />Surface Water Quality and Field Parameters <br />• <br />40 <br />Mountain Coal West Elk Mine <br />Monitoring Location L. Deep Creek Baseline 2008 Water Year <br />Description Units Minimum Maximum Mean 5/11/2008 6/8/2008 8/21/2008 <br />Field Parameters <br />Flow Staff Gauge <br />Flow cfs 37 18 0.82 <br />Electrical Conductivity umhos/cm 120 380 246 231 163 263 <br />H SU 8.10 8.80 8.50 7.60 8.18 8.44 <br />Temperature (°C) °C 0.1 16.4 10.0 7.7 12.0 14.3 <br />Comment <br />Laboratory Parameters 3 <br />Name of Certified Lab 2 Enviro-Chem <br />Lab Reference # 08/940 <br />Sample Date 6/812008 <br />Lab Test Date 6/9-7/3 <br />Sampled B P. Holder <br />Alkalinity Total CaC03 m /I 61 183 126 <br />Aluminum, dissolved m /I 0.03 0.02 <br />Anions me /1 1.8 3.2 2.5 <br />Arsenic, Dissolved m /I <br />Arsenic, total m /I <br />Bicarbonate m /I 65 173 132 <br />Boron, dissolved m /l <br />Cadmium, dissolved m /I <br />Calcium, dissolved m /I 18.6 46.8 31.9 <br />Carbonate m /l 12 2 <br />Cation - Anion Balance % -6.7 -2.9 -4.8 <br />Cations me /l 1.7 2.8 2.25 <br />Chloride m /I 2 1 <br />Conductivity umhos/cm 162 270 216 138.43 <br />Copper, dissolved m /I <br />Hardness m /I 59 156 110 <br />Hydroxide m /I <br />Iron, dissolved m /l 0.03 0.43 0.23 0.12 <br />Iron, total m /I 0.11 5.83 1.68 4.25 <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 /l 0.16 0.04 <br />Mercury, total m /I <br />Molybdenum, dissolved m /l <br />Nitrate as N), dissolved m /I <br />Nitrate/Nitrite as N m /I 010 0.03 <br />Nitrite as N), dissolved m q/1 <br />H lab SU 6.5 8.20 7.4 7.52 <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 calc. 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 /I <br />TDS m /l 90 250 165 112 <br />TSS m /I 448 93 197 <br />Zinc, dissolved mg/l <br />Baseline and WY 2000 data adapted from WWE (2001). <br />2 Enviro-Chem Analytical, Grand Junction, CO <br />3Zero values denote readings below lab detection levels (MDL). <br />West Elk Mine <br />HydroGeo, Inc. <br />C-16 2008 Annual Hydrology Report