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Well GP-4 <br />Water Quality and Field Parameters <br />is <br />• <br />• <br />G-2 <br />Mountain Coal West Elk Mine <br />Monitoring Location Well GP-4 Baseline' 2008 Water Year <br />Description Units Minimum Maximum Mean 5/9/2008 6/6/2008 8/20/2008 <br />Field Parameters <br />Water Level Depth feet 31.7 31.7 31.7 <br />Electrical Conductivity pmhos/cm <br />pH SU <br />Temperature OF <br /> <br />Comment Almost Dry. <br />No FWQ mos ry. <br />No FWQ mos ry. <br />No FWQ <br />Laboratory ParameterS3 <br />Name of Certified Lab 2 <br />Lab Reference # <br />Sample Date <br />Lab Test Date <br />Sampled B <br />Alkalinity (Total CaCO3) mg/I <br />Aluminum, dissolved m /l <br />Anions me /1 <br />Arsenic, total m /l <br />Bicarbonate rn /I <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I <br />Calcium, dissolved m /I <br />Carbonate m /l <br />Cation - Anion Balance m /l <br />Cations me /I <br />Chloride m /I <br />Conductivity µmhos/crn <br />Copper, dissolved m /I <br />Hardness m /I <br />Hydroxide m /I <br />Iron, dissolved m /I <br />Iron, total m /I <br />Lead, dissolved m /I <br />Magnesium, dissolved m /l <br />Manganese, dissolved m /l <br />Manganese, total m /I <br />Mercury, total m /I <br />Molybdenum, dissolved m /I <br />Nitrate/Nitrite as N m /l <br />pH SU <br />Phosphate m /l <br />Phosphorus Ortho , dissolved m /l <br />Potassium, dissolved m /l <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 />3Zero values denote readings below lab detection levels (MDL). <br />West Elk Mine <br />2008 Annual Hydrology Report HydroGeo, Inc.