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Deep Creek Ditch <br />Surface Water Quality and Field Parameters <br />• <br />L_J <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location: Deep Creek Ditch <br /> <br />Descri tion Units Baseline' <br /> <br />Minimum Maximum Mean 6 2008 Water Year <br />Enviro- <br />5/11/2008 6/8/2008 Chem MDL 8/21/2008 <br />Field Parameters <br />Flow gionn / staff 69.77 1527.27 562.69 D 0.06' Staff .20' Staff <br />Electrical Conductivity mhos/cm 75.9 928 316 75 61 <br />H SU 6.32 8.20 7.27 8.67 8.11 <br />Temperature °C) °C 5.0 11.9 9.6 8.8 13.0 <br />Comment <br />Laboratory Parameters 3 <br />Name of Certified Lab z Enviro-Chem <br />Lab Reference # 08/946 <br />Sample Date 6/8/2008 <br />Lab Test Date 6/9-7/30 <br />Sampled B P. Holder <br />Alkalinity (Total CaC03) mg/1 25 60 45 27.31 2 <br />Aluminum, dissolved m /I 0.05 0.15 0.10 0.359 0.01 <br />Anions me /I 0.5 1.4 0.9 0.904 calc <br />Arsenic, dissolved <br />Arsenic, total m /I <br />m /I <br />-0.0005 <br />0.0006 <br />0.0003 <br />0.004 <br />0.001 <br />Bicarbonate m /I 25 60 45 <br />Boron, dissolved m /I -0.01 -0.01 -0.01 0.51 0.01 <br />Cadmium, dissolved m /I -0.005 -0.005 -0.005 0.004 0.001 <br />Calcium, dissolved m /I 4.6 13.7 10.1 532 0.1 <br />Carbonate m /I -2 -2 -2 <br />Cation - Anion Balance % -11.1 6.7 -3.0 -12.16 calc <br />Cations me /I 0.4 1.2 0.9 0.806 calc <br />Chloride m /I 1 9 3 1.76 0.1 <br />Chromium m /I 0.005 <br />Conductivity mhos/ cm 50 113 88 69.74 1 <br />Copper, dissolved m /I -0.01 -0.01 -0.01 0.023 0.002 <br />Cyanide, total m /l <br />Hardness m /I 16 47 35 24.19674 calc <br />Hydroxide m /I -2 -2 -2 <br />Iron, dissolved m g/1 0.04 0.14 0.09 0.19 0.01 <br />Iron, total m /I 1.19 2.59 1.83 1.07 0.01 <br />Lead, dissolved m /I -0.04 -0.04 -0.04 0 0.005 <br />Lead, total m g/1 <br />Magnesium, dissolved m /I 1.1 3.1 2.3 2.65 0.1 <br />Manganese, dissolved m /I -0.005 0.013 0.005 0.006 0.005 <br />Manganese, total m /I 0.032 0.090 0.064 0.056 0.005 <br />Mercury, total m g/1 -0.0002 -0.0002 -0.0002 0.00004 0.000025 <br />Molybdenum, dissolved m /I -0.01 -0.01 -0.01 0.0007 0.001 <br />Nickel, dissolved <br />Nitrate as N), dissolved M q/1 <br />m g/1 <br />0 <br />0.13 <br />Nitrate/Nitrite as N m /I -0.02 3.39 0.90 0 0.13 <br />Nitrite as N), dissolved m /I 0 0.01 <br />H Lab SU 7.8 8.1 8.0 6.44 0.1 <br />Phosphate m /I 0.06 0.09 0.08 0 0.01 <br />Phosphorus Ortho , dissolved m /I 0.02 0.03 0.03 <br />Potassium, dissolved m /I -0.3 0.7 0.5 0.52 0.1 <br />Selenium, dissolved <br />Selenium, total m /I <br />M g/1 <br />-0.001 <br />-0.001 <br />-0.001 <br />0.002 <br />0.001 <br />Silver, total <br />Sodium Absorption Ratio SAR m /I <br />calc. <br />0.19 <br />0.33 <br />0.28 <br />0.377 <br />talc <br />Sodium, dissolved <br />Sulfate m /I <br />m /I 1.8 <br />-10 5.2 <br />-10 3.9 <br />-10 4.27 <br />19.55 0.1 <br />2 <br />s <br />TDS Ratio calc. 1.38 2.05 1.64 6.46 calc <br />TDS Calc. m /I 24 68 47 63.60 2 <br />TDS m /I 40 100 75 68 2 <br />TSS m /I 8 76 32 26 2 <br />Zinc, dissolved mg/1 -0.01 0.03 0.02 0 0.005 <br />Baseline 2006. <br />2 Enviro-Chem Analytical, Grand Junction, CO <br />3Zero values denote readings below lab detection levels (MDL). <br />5 Enviro-Chem TDS Ratio calculation is [(TDS - TDS (Calc.)) / TDS)]' 100 <br />6 Average (mean) value calc using 1/2 of detection limit for readings below lab detection limits unless <br />all readings are below lab detection limit <br />West Elk Mine <br />C_22 2008 Annual Hydrology Report HydroGeo, Inc.