2009-07-01_REPORT - C1980007 (8)

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Deer Creek Spring Water Quality and Field Parameters is • 0 Mountain Coal West Elk Mine Monitoring Location: Deer Creek Spring Baseline' 2008 Water Year DeScri tion Units Minimum Maximum Mean' 5/5/2008 6/8/2006 Enviro- Chem MDL 8/22/2008 Field Parameters Flow m 0.94 4.15 2.88 4.7 6.6 0.6 Electrical Conductivity mhos/cm 574 889 735 642 636 652 H SU 6.72 7.77 7.10 7.20 7.55 7.62 Temperature °F 44.7 63.4 51.7 7.1 6.8 12.1 Temperature °C 7.1 17.4 10.9 Comment Laboratory Parameters 3 Name of Certified Lab Enviro-Chem Lab Reference # 08/937 Sample Date 6/8/2008 Lab Test Date 6/9-7/31 Sampled B P. Holder Alkalinity (Total CaC03) mg/l 294 302 298 242.01 2.000 Aluminum, dissolved m /1 -0.03 -0.03 -0.03 0.391 0.01 Aluminum, total m /l Anions me /l 6.6 6.9 6.7 6.831 talc Arsenic, dissolved m /l Arsenic, total m /l -0.005 -0.005 -0.005 0.005 0.001 Bicarbonate m /I 294 302 298 Boron, dissolved m /I -0.01 -0.01 -0.01 0.72 0.01 Cadmium, dissolved m /I -0.005 -0.005 -0.005 0.004 0.001 Calcium, total m /l Calcium, dissolved m /l 64.8 68.6 66.8 70.5 0.1 Carbonate m /l -2 -2 -2 Cation - Anion Balance % -5.3 0.0 -2.1 6.54 talc Cations me /1 6.2 6.6 6.425 7.309 talc Chloride m /l 3 4 3 1.44 0.1 Conductivity mhos/cm 587 660 611 520.07 1 Copper, dissolved m /I -0.01 -0.01 -0.01 0.014 0.002 Hardness m /I 241 255 249 281.4593 talc Hydroxide m /I -2 -2 -2 Iron, dissolved m /I -0.02 -0.02 -0.02 0.03 0.01 Iron, total m /I -0.02 0.20 0.10 0.42 0.01 Lead, dissolved m /I -0.04 -0.04 -0.04 0 0.005 Magnesium, dissolved m /I 19.1 20.4 20.0 25.6 0.1 Manganese, dissolved m /I -0.005 -0.005 -0.005 0.002 0.005 Manganese, total m /l -0.005 0.005 0.003 0.009 0.005 Mercury, total m /l -0.0002 -0.0002 -0.0002 0.00003 0.000025 Molybdenum, dissolved m /l -0.01 -0.01 -0.01 0.0026 0.001 Nitrate as N m /l 0 0.13 Nitrate/Nitrite as N m /l 1.92 2.33 2.16 0 0.13 Nitrite as N m /l 0 0.01 H SU 7.9 8.2 8.1 7.98 0.1 Phosphate m /I -0.03 0.03 0.02 0 0.01 Phosphorus Ortho , dissolved m /I -0.01 0.01 0.02 Potassium, dissolved m /l 1.9 2.1 2.0 2.9 0.1 Selenium, dissolved m /l Selenium, total recoverable m /l -0.001 -0.001 -0.001 0.005 0.001 Sodium Absorption Ratio SAR talc. 0.87 0.95 0.92 0.946 talc Sodium, dissolved m /I 31.1 34.7 33.0 36.5 0.1 Sulfate m /I 30 40 33 20.17 2 TDS Ratio calf. 0.95 1.06 1.02 3.82 talcs TDS Calc. M q/11 329 341 336 400.73 2 TDS m /I 320 360 343 386 2 TSS m /l -5 14 5 9 2 Zinc, dissolved m /l 0.02 0.02 0.02 0.005 0.005 Zinc, total mg/l Baseline 2006 2 Enviro-Chem Analytical, Grand Junction, C 'Zero values denote readings below lab detection levels (MDL). "Average mean value talc using 1/2 of detection limit for readings below lab detection limits unless all readings are below lab detection limit s Enviro-Chem TDS Ratio calculation is [(TDS - TDS (Calc.)) / TDS)]' 100 West Elk Mine E-30 2008 Annual Hydrology Report HydroGeo, Inc.