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Spring J-4 <br />Water Quality and Field Parameters <br />• <br /> <br />• <br />E-28 <br />Mountain Coal West Elk Mine <br />Monitoring Location : Spring J-4 Baseline' 2009 Water Year <br />Description Units Minimum Maximum Mean 5/8/2009 5/25/2009 Q 4 8/11/2009 <br />Field Parameters <br />Flow m 13.20 120 4.21 <br />Electrical Conductivity mhos/cm 340 480 392 535 525 546 <br />H SU 7.5 8.2 7.8 7.75 7.83 7.87 <br />Temperature °C 8.0 9.0 12.9 <br />Comment <br />Laboratory Parameters' <br />Name of Certified Labe ACZ <br />Lab Reference # L76064-10 <br />Sample Date 5/25/2009 <br />Lab Test Date 5/29-6/5 <br />Sampled B PH <br />Alkalinity (Total CaC03) mg/I 109 262 195 <br />Aluminum, dissolved m /I 0.05 0.02 <br />Aluminum, total m /I 0.03 6.32 0.9 <br />Anions me /I 4.5 4.7 4.6 <br />Arsenic, dissolved m /I 0.001 0 <br />Arsenic, total m /I <br />Bicarbonate m /I 169 262 195 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I <br />Calcium, total m /I 0.004 0.001 <br />Calcium, dissolved m /I 34.2 54.4 43 <br />Carbonate m /I <br />Cation - Anion Balance % 1.1 3.2 2.3 <br />Cations me /I 4.6 4.91 4.8 <br />Chloride m /I 3 1.9 <br />Conductivity mhos/cm 412 429 423 497 <br />Copper, dissolved m /I 0.01 0 <br />Hardness m /I 125 191 156 <br />Hydroxide m /I <br />Iron, dissolved m /I 0.06 0.02 -0.02 U <br />Iron, total m /I 0.03 6.75 0.82 0.14 <br />Lead, dissolved m /I <br />Magnesium, dissolved m /I 9.6 13.4 11.4 <br />Manganese, dissolved m /I <br />Manganese, total m /I 0.066 0.009 <br />Mercury, total m /I <br />Molybdenum, dissolved m /I <br />Nitrate as N m /I 0.02 0.37 0.14 <br />Nitrate/Nitrite as N m /I 0.05 0.37 0.13 <br />Nitrite as N m /I 0.03 0.003 <br />H SU 7.1 8.1 7.5 8.5 H <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I 0.025 0.005 <br />Potassium, dissolved m /I 1.3 1.3 1.3 <br />Selenium, dissolved m /I <br />Selenium, total m /I 0.002 0 <br />Selenium, total recoverable m /I 0.001 0 <br />Sodium Absorption Ratio SAR calc. 1.08 1.8 1.3 <br />Sodium, dissolved m /I 29.6 51.5 36.7 <br />Sulfate m /I 30 60 45 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 230 300 254 300 <br />TSS m /I 26 6 -5 U <br />Zinc, dissolved m /I 0.01 0 <br />Zinc, total mg/I <br />' Baseline 2006 <br />2 ACZ Laboratory, Steamboat Springs, CO <br />3 Negative values denote readings below lab detection levels. <br />4 ACZ Lab Qualifiers: U - Analyte was analyzed for but not detected at the indicated MDL. <br />H - Holding time exceeded; pH is a field test with an immediate hold time. <br />B - Analyte conc detected at a value bet method detection limit (MDL) and practical quantitation limit (PQL). <br />West Elk Mine <br />2009 Annual Hydrology Report HydroGeo, Inc.