2009-07-01_REPORT - C1980007 (8)

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Deep Creek Spring # 2 Water Quality and Field Parameters • 1 7--7 0 Mountain Coal West Elk Mine Monitoring Location : Deep Creek Spring #2 Baseline' 2008 Waiter Year Descri tion Units Minimum Maximum Mean` 5/11/2008 6/8/2008 Enviro- Chem MDL 8/21/2008 Field Parameters Flow m 0.19 0.29 0.24 0.375 0.38 0.28 Electrical Conductivity umhos/cm 396 453 433 294 340 401 H SU 7.97 8.19 8.09 7.69 8.26 8.23 Temperature °C 7.1 13.4 10.4 10.9 8.7 19.3 Comment Laboratory Parameters' Name of Certified Lab Enviro-Chem Lab Reference # 08/945 Sample Date 6/8/2008 Lab Test Date 6/9-7/31 Sampled B P. Holder Alkalinity Total CaCO3 m A 167 219 195 140.47 2 Aluminum, dissolved m A -0.03 0.09 -0.06 0.262 0.01 Anions me A 3.8 4.8 4.3 3.998 calc Arsenic, dissolved m n Arsenic, total m A -0.0005 0.0012 -0.0006 0.003 0.001 Bicarbonate m A 159 211 185 Boron, dissolved m /I 0.01 0.02 0.01 0.54 0.01 Cadmium, dissolved m A -0.005 -0.005 -0.005 0 0.001 Calcium, dissolved m A 41.6 47.8 44.2 38 0.1 Carbonate m A 6 14 9 Cation -Anion Balance m n 0.0 4.9 1.8 7.52 calc Cations me A 4.1 4.9 4.5 4.323 calc Chloride m /I 2 3 2 1.76 0.1 Conductivity mhos/cm 393 440 422 334.18 1 Copper, dissolved m A -0.01 0.03 -0.01 0.03 0.002 Hardness m A 127 147 136 129.60074 calc Hydroxide m /I -2 -2 -2 Iron, dissolved m A 0.02 0.08 0.05 0.05 0.01 Iron, total m A 1.07 9.71 3.70 0.93 0.01 Lead, dissolved m A -0.04 -0.04 -0.04 0.005 0.005 Magnesium, dissolved m /I 5.7 6.7 6.3 8.43 0.1 Manganese, dissolved m A -0.005 0.008 -0.003 0.004 0.005 Manganese, total m A 0.018 0.146 0.057 0.039 0.005 Mercury, total m n -0.0002 -0.0002 -0.0002 0.00006 0.000025 Molybdenum, dissolved m A -0.01 -0.01 -0.01 0.0019 0.01 Nitrate as N), dissolved m A o 0.13 Nitrate/Nitrite as N m A -0.02 0.25 -0.08 0 0.13 Nitrite as N), dissolved m A 0' 0.01 H SU 8.4 8.5 8.4 7.93 0.1 Phosphate m A -0.03 0.18 -0.05 0 0.01 Phosphorus Ortho , dissolved m A -0.01 0.06 -0.02 0.01 Potassium, dissolved m /I 0.9 1.4 1.2 1.59 0.1 Selenium, total m /I -0.001 -0.001 -0.001 0.003 0.001 Sodium Absorption Ratio SAR calc. 1.37 1.63 1.49 1.443 calc Sodium, dissolved m A 35.1 44.8 39.5 37.75 0.1 Sulfate m A 20 20 20 17.7 2 TDS Ratio talc. 1.01 1.16 1.06 7.17 calc TDS Calc. m A 209 257 234 247.57 2 TDS m /I 230 260 247 231 2 TSS m /I 6 302 136 35 2 Zinc, dissolved mgA -0.01 0.03 -0.01 0 0.005 Baseline 2007 i Enviro-Chem Analytical, Grand Junction, CO 3 Zero values denote readings below lab detection levels (MDL). value talc using 1/2 of detection limit for readings below lab detection limits unless all readings are below lab detection limit Avera a mean, Enviro-Chem TDS Ratio calculation is [(TDS - TDS (Calc.)) / TDS))' 100 West Elk Mine E-35 2008 Annual Hydrology Report HydroGeo, Inc.