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Spring 13-1 <br />Water Quality and Field Parameters <br />is <br />• <br />• <br />Mountain Coal West Elk Mine <br />Monitoring Location Spring 13-1 Baseline' 2009 Water Year <br />Description Units Minimum Maximum Mean 5/6/2009 5/26/2009 Q 8/8/2009 <br />Field Parameters <br />Flow gpm 0.31 0.28 0.38 <br />Electrical Conductivity umhos/cm 1068 1093 1127 <br />pH SU 8.30 8.29 8.45 <br />Temperature °C 8.3 7.6 9.7 <br />Comment <br />Laboratory Parameters' <br />Name of Certified Lab ACZ <br />Lab Reference # L76041-03 <br />Sample Date 5/26/2009 <br />Lab Test Date 5/27-6/9 <br />Sampled B PH <br />Alkalinity (Total CaC03) mg/I 588 1 1 <br />Aluminum, dissolved mg/I -0.03 U <br />Anions meq/1 12.2 <br />Arsenic, dissolved mg/I <br />Arsenic, total mg/I -0.0005 U <br />Bicarbonate mg/I 530 <br />Boron, dissolved mg/I 0.11 <br />Cadmium, dissolved mg/11 -0.005 U <br />Calcium, dissolved mg/I 22.5 <br />Carbonate mg/l 58 <br />Cation - Anion Balance mg/I -0.4 <br />Cations meq/1 12.1 <br />Chloride mg/I 2 B <br />Conductivity umhos/cm 1030 <br />Copper, dissolved mg/I -0.01 U <br />Hardness mg/I 98 <br />Hydroxide mg/l -2 U <br />Iron, dissolved mg/I -0.02 U <br />Iron, total mg/I 1.04 <br />Lead, dissolved mg/I -0.04 U <br />Magnesium, dissolved mg/I 10.2 <br />Manganese, dissolved mg/I -0.005 U <br />Manganese, total mg/I 0.013 B <br />Mercury, total mg/I -0.0002 U <br />Molybdenum, dissolved mg/I -0.01 U <br />Nitrate (as N), dissolved mg/l <br />Nitrate/Nitrite (as N) mg/I 0.02 B <br />Nitrite (as N), dissolved mg/I <br />pH SU 8.7 H <br />Phosphate mg/I 0.03 B <br />Phosphorus (Ortho), dissolved mg/I 0.01 B <br />Potassium, dissolved mg/I 1.5 B <br />Selenium, total mg/1 0.0002 B <br />Sodium Absorption Ratio (SAR) talc. 10.20 <br />Sodium, dissolved mg/I 230 <br />Sulfate mg/I 17 <br />TDS Ratio talc. 0.96 <br />TDS (Calc.) mg/I 659 <br />TDS mg/I 630 <br />TSS mg/I 48 <br />Zinc, dissolved mg/I -0.01 U <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-2 2009 Annual Hydrology Report HydroGeo, Inc.