2010-06-30_REPORT - C1980007 (7)

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Deep Creek Trail Spring Water Quality and Field Parameters • • • Mountain Coal West Elk Mine Monitoring Location : Deep Creek Trail Spring Baseline' 2009 Water Year Description Units Minimum Maximum Mean 5 5/9/2009 6/4/2009 Q ° 8/9/2009 Field Parameters Flow m 1.24 3.51 1.77 16.9 7.33 1.71 Electrical Conductivity umhos/cm 400 479 455 338 391 457 H SU 7.72 8.07 7.90 7.77 7.86 8.02 Temperature oC 5.8 11.8 8.7 5.5 6.7 8.7 Comment Laboratory ParameterS3 Name of Certified Labe ACZ Lab Reference # L76236-13 Sample Date 614/2009 Lab Test Date 6/5-6/17 Sampled B PH Alkalinity Total CaC03 m /I 161 236 211 165 Aluminum, dissolved m /I -0.03 0.11 0.04 -0.03 U Anions me /1 3.7 4.9 5 3.8 Arsenic, dissolved m /I Arsenic, total m /l -0.0005 -0.0005 -0.0005 -0.0005 U Bicarbonate m /l 156 232 208 160 Boron, dissolved m /I 0.02 0.02 0.02 0.02 B Cadmium, dissolved m /I -0.005 -0.005 -0.005 -0.005 U Calcium, dissolved m /I 29.4 40.3 37.4 31.1 Carbonate m /I -2 7 4 6 B Cation - Anion Balance % -1.1 9.5 1.9 0 Cations me /I 3.7 5.2 4.7 3.8 Chloride m /I 1 2 2 2 B Conductivity umhos/cm 357 463 440 348 Copper, dissolved m /I -0.01 0.02 0.01 -0.01 U Hardness m /I 96 123 116 100 Hydroxide m /l -2 -2 -2 -2 U Iron, dissolved m /I -0.02 0.14 0.05 -0.02 U Iron, total m /I 0.14 1.63 0.79 0.12 Lead, dissolved m /I -0.04 -0.04 -0.04 -0.04 U Magnesium, dissolved m /I 5.2 6.0 5.6 5.4 Manganese, dissolved m /I -0.005 -0.005 -0.005 -0.005 U Manganese, total m /I -0.005 0.024 0.012 -0.005 U Mercury, total m /I -0.0002 -0.0002 -0.0002 -0.0002 U Molybdenum, dissolved m /I -0.01 -0.01 -0.01 -0.01 U Nitrate as N), dissolved m /I Nitrate/Nitrite (as N m /I -0.02 1.51 0.66 0.04 B Nitrite as N), dissolved m /I H SU 8.3 8.4 8.4 8.4 H Phosphate m /l -0.03 0.15 0.05 -0.03 U Phosphorus Ortho , dissolved m /I -0.01 0.05 0.02 -0.01 U Potassium, dissolved m /I 1.0 1.1 1.0 1.0 B Selenium, total m /I -0.001 -0.001 -0.001 0.0003 B Sodium Absorption Ratio SAR calc. 1.85 2.47 2.22 1.84 Sodium, dissolved m /I 41.2 62.0 54.6 41.8 Sulfate m /I 10 20 14 22 TDS Ratio calc. 0.96 1.16 1.05 1.02 TDS Calc. m /I 198 262 243 205 TDS m /I 230 270 253 2101 1 TSS m /I -5 60 20 8 B Zinc, dissolved mg/I -0.01 0.02 0.01 -0.01 U 1 Baseline 2007 2 ACZ Laboratory, Steamboat Springs, CO 3 Negative values denote readings below lab detection levels. 4 ACZ Lab Qualifiers: U - Analyte was analyzed for but not detected at the indicated MDL. H - Holding time exceeded; pH is a field test with an immediate hold time. B -Analyte conc detected at a value bet method detection limit (MDL) and practical quantitation limit (PQL). 5 Average mean value calc using 1/2 of detection limit for readings below lab detection limits unless all readings are below lab detection limit. E-34 West Elk Mine 2009 Annual Hydrology Report HydroGeo, Inc.