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Lower Minnesota Creek )USGS) <br />Surtace Water pualiry and Field Parameters <br />l_J <br />r, <br />LJ <br />• <br />C-6 <br />Mountain Coal West Elk Mine <br />Monitoring Location L. Minnesota Ck (USGS) Baseline 20 05 Water Year <br />DeBCd lion Units Minimum Maximum Mean 5/1/2005 6/5/2005 70/3/2005 <br />Fieltl Parameters <br />FIOw SSaH Gau a 4.32 NA 0.59 <br />ElecMcal Contluctivi umhos/cm 512 275 35e <br />H SU 7.63 7.8 7.63 <br />Tem erature °C °C <br />Tem rature °F) °F 48.2 44.4 52.0 <br />Comment <br />Laborato Parameters` <br />Name of Certified Lab ACZ <br />Lab Reference # L51469-09 <br />Sam le Date 6/5/2005 <br />Lab Test Date 6n120os <br />Sam led B <br />Alkalini Total CaC03 m A <br />Aluminum, dissolved m A <br />Anions me <br />Arsenic, dissolved m <br />Arsenic, total m A <br />Bicarbonate m /I a6 75 so <br />Boron, dissolved m <br />Cadmium, dissolved m A <br />Calcium, dissolved m A 19.6 19.6 79.6 <br />Carbonate m q <br />Cation -Anion Balance <br />Cations me A <br />Chloride m A 2 t <br />ConducOvi umhos/cm 152 803 350 t7o <br />Co er, dissolved m A <br />Hardness m A 65 706 az <br />H tlroxide m A <br />Imn, dissolved m A 0.23 0.58 0.41 0.06 <br />Iron, tOlel m ll 0.45 82 8.9 3.37 <br />Lead, dissolved m A <br />Ma nesium, dissolved m A 6.1 8.7 74 <br />Ma arle8e, dissolved /1 0.073 0.075 0.074 <br />Man anese, total m A o.o7a 1.e3 0.188 <br />Mercu ,total m /I <br />Mol Ddenum, tlissolvetl m A <br />Nitrate as N ,dissolvetl m A <br />Nitrate/Nitdte as N m 4 <br />Nitrite as N ,dissolved m <br />H lab SU 7.9 <br />Phos hale m A <br />Phos horns Ortho ,dissolved m /I <br />Potassium, dissolved m A <br />Selenium, dissolvetl m A <br />Selenium, ropl m /1 <br />Sodium Abso lion Ratio SAR talc. 0.3 o.s o.4 <br />Sodium, dissolved m fl 7.7 7.7 7.7 <br />Sulfate m A zo so 40 <br />TDS Ra[io talc. <br />TDS Calc. m /1 <br />"(D$ m A 700 584 237 120 <br />TSS m A 16 1300 292 94 <br />Zinc, dissolved m9 <br />'Baseline, VV1' 2000, and WY 2001 tlata aria ted from W WE. <br />ACZ -ACZ Laboratories, Inc., Steamboa t S rin s, CO <br />Ne alive values denote reatlin s below lab detec0on levels <br />NM -Not Measured <br /> <br />West Elk Mine <br />2005 Annual Hydrology Report HydroGeo, Inc. <br />