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Well RPE-1 <br />Water Quality and Field Parameters <br />is <br />• <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location <br />Description Well RPE-1 <br />Units Baseline' <br />Minimum Maximum Mean 200EI Water Year <br />5/9/2008 6/6/2008 8/20/2008 <br />Field Parameters <br />Water Level Depth feet 23.9 27.5 29.4 <br />Electrical Conductivity µmhos/Cm 1120 1307 1154 <br />H SU 7.45 7.73 7.85 <br />Temperature (°C) <br /> <br /> <br />Comment °C 8.5 9.8 17.7 <br />not enough <br />water for lab <br />sample <br />Laboratory Parameters <br />Name of Certified Lab <br />Lab Reference # <br />Sample Date <br />Lab Test Date <br />Sampled B <br />Alkalinity (Total CaC03) mg/I <br />Aluminum, dissolved M q/1 <br />Ammonia m /l <br />Anions me /l <br />Arsenic, dissolved m /I <br />Arsenic, total m /I <br />Bicarbonate m /I <br />Boron, dissolved m /I <br />Cadmium, dissolved m /l <br />Calcium, dissolved m q/1 <br />Carbonate m /l <br />Cation - Anion Balance % <br />Cations me /I <br />Chloride m /l <br />Conductivity lurnhos/cm <br />Copper, dissolved m q/1 <br />Hardness m /I <br />Hydroxide m /l <br />Iron, dissolved m /I <br />Iron, total m /I <br />Lead, dissolved m /I <br />Magnesium, dissolved m /l <br />Man anese, dissolved m /I <br />Manganese, total m /l <br />Mercury, total m /I <br />Molybdenum, dissolved m /I <br />Nitrate/Nitrite as N m /1 <br />Nitrogen, ammonia m /I <br />H SU <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I <br />Potassium, dissolved m /l <br />Selenium, dissolved MW <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR calc. <br />Sodium, dissolved m /I <br />Sulfate m /l <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I <br />TSS m /I <br />Zinc, dissolved mg/I <br />Baseline and WY 2000 data adapted from WWE (2001). <br />2 Enviro-Chem Analytical, Grand Junction, CO <br />'Zero values denote readings below lab detection levels (MDL). <br />West Elk Mine <br />HydroGeo, Inc. <br />G-5 2008 Annual Hydrology Report