2009-07-01_REPORT - C1980007 (8)

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96-2.2 Area Spring Water Quality and Field Parameters • C7 • Mountain Coal West Elk Mine Monitoring Location 96-2-2 Area Spring Baseline' 2008 Water Year Descri tion Units Minimum Maximum Mean" 5111/2008 6/8/2008 Enviro- Chem MDL 8/21/2008 Field Parameters Flow m 0.11 2.5 0.75 10.1 1.9 Trickle Electrical Conductivity umhos/cm 348 430 399 187 326 431 H SU 7.78 8.18 7.88 7.89 7.95 8.12 Temperature oC 6.9 12.3 10.6 5.0 6.0 11.1 Comment Laboratory Parameters 3 Name of Certified Lab z Enviro-Chem Lab Reference # 08/939 Sample Dale 6/8/2008 Lab Test Date 6/9-7131 Sampled B P. Holder Alkalinity Total CaC03 m /I 129 172 156 112.56 2 Aluminum, dissolved m A -0.03 0.21 0.09 0.238 0.01 Anions me /I 3.2 4 18 3.609 calc Arsenic, dissolved m A Arsenic, total m /I -0.0005 0.0012 0.0007 0.008 0.001 Bicarbonate m /I 129 171 154 Boron, dissolved m A 0.01 0.02 0.02 0.65 0.01 Cadmium, dissolved m A -0.005 -0.005 -0.005 0.004 0.001 Calcium, dissolved m A 11.8 18.3 16.2 14.7 0.1 Carbonate m A -2 10 4 Cation - Anion Balance m A 0.0 5.6 2.2 4.57 calc Cations me A 13 4.3 4.0 3.782 calc Chloride m /I 2 3 2 1.44 0.1 Conductivity umhos/cm 332 421 387 301.58 1 Copper, dissolved m A -0.01 -0.01 -0.01 0.02 0.002 Hardness m A 38 59 52 49.55406 calc Hydroxide m /I -2 -2 -2 Iron, dissolved m A 0.05 0.30 0.13 0.21 0.01 Iron, total m A 0.84 9.08 4.55 1.:I 0.01 Lead, dissolved m A -0.04 -0.04 -0.04 0 0.005 Magnesium, dissolved m /I 21 3.3 2.9 3.12 0.1 Manganese, dissolved m A -0.005 0.177 0.045 0.003 0.005 Manganese, total m /I 0.013 0.153 0.075 0.011 0.005 Mercury, total m A -0.0002 -0.0002 -0.0002 0.00004 0.000025 Molybdenum, dissolved m /I -0.01 0.01 0.01 0.001 0.01 Nitrate as N), dissolved m /I 0.78 0.13 Nitrate/Nitrite as N m /I -0.02 0.04 0.03 0.73 0.13 Nitrite (as N), dissolved m /l 0 0.01 H SU 8.2 8.5 8.4 7.36 0.1 Phosphate m /I 0.03 0.18 0.08 0 0.01 Phosphorus Ortho , dissolved m /I 0.01 0.06 0.03 0.01 Potassium, dissolved m /I 0.7 1.4 1.2 1.19 0.1 Selenium, total m A -0.001 0.002 0.0008 0.005 0.001 Sodium Absorption Ratio SAR talc. 3.93 4.17 4.09 3.817 calc Sodium, dissolved m A 58.5 70.8 67.0 61.75 0.1 Sulfate m A 30 30 30 23.46 2 TDS Ratio calc. 0.97 1.04 1.02 5.45 calcs TDS Calc. m A 183 231 216 221.45 2 TDS m /I 190 240 220 210 2 TSS m /I 22 510 175 72 2 Zinc, dissolved mg/I -0.01 0.11 0.03 0.006 0.005 Baseline 2007 2 Enviro-Chem Analytical, Grand Junction, CO ] Zero values denote readings below lab detection levels (MDL). Average (mean) value calc using 1/2 of detection limit for readings below lab detection limits unless all readings are below lab detection limit 5 Enviro-Chem TDS Ratio calculation is [(TDS - TDS (Calc.)) / TDS)]' 100 West Elk Mine E-36 2008 Annual Hydrology Report HydroGeo, Inc.