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Spring 27-1 <br />Water Quality and Field Parameters <br /> <br />• <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring 27-1 Baseline' 2009 Water Year <br />Description Units Minimum Maximum Mean 5/712009 5/24/2009 Qa 0/2009 <br />Field Parameters <br />Flow m 4.50 3.72 .56 <br />r <br />1 <br />Electrical Conductivity mhos/cm 290 460 364 539 606 735 <br /> <br />H <br />SU <br />7.9 <br />8.6 <br />8.2 <br />7.73 <br />8.05 7 <br />.60 <br />Temperature OC 6.5 7.0 8.8 <br />Comment <br />Laboratory Parameters' <br />Name of Certified Labe ACZ <br />Lab Reference # L76064-06 <br />Sample Date 5/24/2009 <br />Lab Test Date 5/29-6/5 <br />Sampled B PH <br />Alkalinity (Total CaC03) mg/I 136 290 169 <br />Aluminum, dissolved m /I <br />Anions me /I 3.9 4.5 4.2 <br />Arsenic, dissolved m /I <br />Arsenic, total m /I <br />Bicarbonate m /l 136 290 168 <br />Boron, dissolved m /I <br />Cadmium, dissolved m /I <br />Calcium, dissolved m /I 19.9 29.4 24.4 <br />Carbonate m /I 7 0.9 <br />Cation - Anion Balance % 1.3 4.3 2.8 <br />Cations me /I 4 4.9 4.45 <br />Chloride m /I 2 6 3 <br />Conductivity mhos/cm 368 437 403 572 <br />Copper, dissolved m /I <br />Hardness m /I 64 122 85 <br />Hydroxide m /I <br />Iron, dissolved m /I 0.02 0.01 -0.02 U <br />Iron, total m /I 0.16 9.15 1.66 0.09 <br />Lead, dissolved m /I <br />Magnesium, dissolved m /I 4.5 7.8 5.77 <br />Manganese, dissolved m /I <br />Manganese, total m /I 0.192 0.037 <br />Mercury, total m /I <br />Molybdenum, dissolved m /I <br />Nitrate as N m /I 0.4 0.06 <br />Nitrate/Nitrite as N m /I 0.4 0.06 <br />Nitrite as N m /l <br />pH SU 7.6 8.2 7.9 8.4 H <br />Phosphate m /I <br />Phosphorus Ortho , dissolved m /I 0.022 0.003 <br />Potassium, dissolved m /I 1 1.2 1.1 <br />Selenium, total m /I <br />Sodium Absorption Ratio SAR Cale. 2.91 4.98 3.4 <br />Sodium, dissolved m /I 57.2 74.5 66.1 <br />Sulfate m /I 30 80 57 <br />TDS Ratio calc. <br />TDS Calc. m /I <br />TDS m /I 210 300 252 330 <br />TSS m /I 96 42 -5 U <br />Zinc, dissolved mg/I <br />' Baseline pre -2000 data, adapted from WWE (2001) <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 />E-8 2009 Annual Hydrology Report HydroGeo, Inc.