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Well SOM-3-E <br />Water Quality and Field Parameters <br />is <br />• <br />11 <br />Mountain Coal West Elk Mine <br />Monitoring Location Well SOM -3-E Baseline 2009 Water Year <br /> <br />Description <br />Units <br />Minimum <br />Maximum <br />Means <br />5/912009 <br />5/25/2009 <br />8/11/2009 <br />Q ° 8/11/2009 <br />(Duplicate) <br />Q' <br />Field Parameters <br />Water Level Depth feet 981.5 988.2 998.6 998.6 <br />Electrical Conductivity mhos/cm 2240 2260 2340 2340 <br />H SU 8.50 8.40 8.12 8.12 <br />Temperature °C 19.5 19.7 20.7 20.7 <br />Comment <br />Laboratory Parameters 3 <br />Name of Certified Lab z ACZ ACZ <br />Lab Reference # L77515-03 L77515-02 <br />Sample Date 8/11/2009 8/11/2009 <br />Lab Test Date 8/14-8/19 8/14-8/19 <br />Sampled B PH PH <br />Alkalinity (Total CaC03) mg/I 1050 1360 1252 <br />Aluminum, dissolved m A <br />Ammonia m /I 0.08 0.06 0.08 <br />Anions me /1 25.2 33.3 27.9 <br />Arsenic, dissolved m A -0.001 0.0027 0.0005 <br />Arsenic, total m /I <br />Bicarbonate m A 1050 1360 1242 <br />Boron, dissolved m /I 1.11 1.11 1.11 <br />Cadmium, dissolved m A -0.03 -0.01 -0.01 <br />Calcium, dissolved m /I 2.6 33 6 <br />Carbonate m /I -2 42 11 <br />Cation - Anion Balance % -6.6 4.4 1.1 <br />Cations me A 26.3 29 28 <br />Chloride m /I 4 42 9 <br />Conductivity mhos/cm 2040 2090 2067 2150 2140 <br />Copper, dissolved m /I <br />Hardness m /I 19 128 56 <br />Hydroxide m /I -2 -2 -2 <br />Iron, dissolved m /I 0.05 127 10.41 0.05 B 0.03 B <br />Iron, total m /I 8.95 419 151 5.31 5.08 <br />Lead, dissolved m /I -0.04 -0.04 -0.04 <br />Magnesium, dissolved m /I 0.7 11.0 2.1 <br />Manganese, dissolved m A 0.01 1.640 0.170 <br />Manganese, total m /I 0.139 5.21 1.87 <br />Mercury, dissolved m A -0.0002 0.0016 0.0002 <br />Mercury, total m /I <br />Molybdenum, dissolved m A <br />Nitrate as N m /I 0.03 0.22 0.14 <br />Nitrate/Nitrite as N m A -0.2 2.8 0.3 <br />Nitrite as N m A 0.01 0.01 0.01 <br />Nitrogen, ammonia m /I 0.61 2.17 0.89 <br />H SU 8.2 8.4 8.3 8.6 H 8.7 H <br />Phosphate m A -0.03 1.4 0.2 <br />Phosphorus Ortho , dissolved m /I -0.01 0.45 0.05 <br />Potassium, dissolved m A 3.7 6.5 4.6 <br />Selenium, dissolved m A -0.002 0.000 -0.001 <br />Selenium, total m A <br />Sodium Absorption Ratio SAR talc. 23 61 46 <br />Sodium, dissolved m A 304 628 546 <br />Sulfate m /I -10 530 49 <br />TDS Ratio talc. 0.83 1.00 0.93 <br />TDS Calc. m /I 1380 1850 1543 <br />TDS m /I 1330 1540 1395 1480 1480 <br />TSS m /I 10 B 18 B <br />Zinc, dissolved mg/I -0.01 0.91 0.10 <br />'Baseline 2004 <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 />F Average mean value calc usin 1/2 of detection limit for readings below lab detection limits unless all readin s are below lab detection limit. <br />G-20 <br />West Elk Mine <br />2009 Annual Hydrology Report <br />HydroGeo, Inc.