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Box Canyon <br />Surface Water Quality and Field Parameters <br />• <br />• <br />0 2 Enviro-Chem Analytical, Grand Junction, CO <br />Mountain Coal West Elk Mine <br />Monitoring Location Box Canyon Baseline 2008 Water Year <br />Description Units Minimum Maximum Mean 5/6/2008 6/6/2008 8/23/2008 <br />Field Parameters* <br />Flow m 4.4 9.6 Trickle <br />Electrical Conductivity umhos/cm 840 1020 916 1203 1204 1211 <br />H SU 7.9 8.9 8.3 8.00 8.48 8.68 <br />Temperature (C) C 2.0 15.9 10.0 9.5 12.9 16.6 <br />Temperature (F) F 35.6 60.6 50.0 <br />Comment <br />Laboratory Parameters <br />Name of Certified Lab Enviro-Chem <br />Lab Reference # 08/922 <br />Sample Date 6/6/2008 <br />Lab Test Date 6/9-7/3 <br />Sampled B P. Holder <br />Alkalinity Total CaC03 m /l 401 447 427 <br />Aluminum, dissolved m /l <br />Aluminum, total m /I o 0.07 0.03 <br />Anions me /1 10.3 12.1 11.1 <br />Arsenic, dissolved m /I o 0 0 <br />Arsenic, total m /l 0 0.006 0.001° <br />Bicarbonate m g/1 398 447 425 <br />Boron, dissolved m /l <br />Cadmium, total M q/1 0 0.003 0.0008 <br />Calcium, dissolved m /I 40.2 67.9 58,0 <br />Carbonate m /I 0 12 2 <br />Cation - Anion Balance % -4 3.6 0.02 <br />Cations me /I 9.5 12.23 11.1 <br />Chloride m /l 2 6 5 <br />Conductivity umhos/cm 868 968 921 752.67 <br />Copper, dissolved m /l <br />Hardness m /I 195 283 255 <br />Hydroxide m /I o 0 0 <br />Iron, dissolved m /l 0 0.02 0.01 0.03 <br />Iron, total m /l 0.02 0.44 0.16 3.01 <br />Lead, dissolved m /I <br />Lead, total m q/1 <br />Magnesium, dissolved m /I 23 28 27 <br />Manganese, dissolved m /l <br />Manganese, total m /I 0 0.009 0.002 <br />Mercury, total m /l <br />Molybdenum, dissolved m /l <br />Nitrate as N), dissolved m q/1 0.13 0.48 0.30 <br />Nitrate/Nitrite as N m /I 0.13 0.48 0.30 <br />Nitrite as N), dissolved m /I <br />H lab SU 8 8.2 8.1 7.93 <br />Phosphate m /l 0 0.03 0:01 <br />Phosphorus Ortho , dissolved M q/1 0 0.007 0.002 <br />Potassium, dissolved m /I 2.6 3.3 3.0 <br />Selenium, dissolved m /I 0.001 0.002 0.002 <br />Selenium, total m /I 0 0.003 0.001 <br />Sodium Absorption Ratio SAR) calc. 3.43 4.26 3.91 <br />Sodium, dissolved m q/1 127 154 141 <br />Sulfate m /I 100 140 118 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 540 620 586 727 <br />TSS m q/1 0 38 19 1 1 87 <br />Zinc, dissolved mg/l 0 0.01 0.002 <br />Baseline and WY 2000 data adapted from WVVE (2001). Shaded cells indicate value different from AHR 2000 baseline value due to <br />rounding. <br />3Zero values denote readings below lab detection levels (MDL). <br />West Elk Mine <br />HydroGeo, Inc. <br />C-17 2008 Annual Hydrology Report