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Horse Gulch <br />Surface Water Quality and Field Parameters <br />i <br /> <br /> <br />Mountain Coal West Elk Mine <br />Monitoring Location Horse Gulch Baseline 2005 Water Year <br />D26Cfl tl0n Units Minimum Maximum Mean 5/10/2005 6/5/2005 9/13/2005 <br />Field Parameters <br />Flow m D D o <br />Electrical Conductivi umhos/cm 240 740 542 <br />H SU 8.2 e.5 8.3 <br />Tem erature °C °C 5.1 14.7 to <br />Tem erature °F °F <br />Comment <br />Laborsto Parameters' <br />Name of Certified Lab <br />Lab Reference # <br />Sam le Date <br />Lab Test Date <br />Sam led B <br />Alkalini Total CaCO3 m /I 1ze 33z 270 <br />Aluminum, dissolved m /I o.oa o.0a o.oa <br />Anions me /I 6.5 5.5 6.5 <br />Arsenic, Dissolved m !I <br />Arsenic, total m /I 0.001 0.001 0.001 <br />Bicarbonate m /I 128 331 268 <br />Boron, dissolved m /l <br />Cadmium, dissolved m /I <br />Calcium, dissolved m /I 0.004 0.000 <br />Carbonate m /I s 2 <br />Cation -Anion Balance % -4.e -4.e a.a <br />Cations me /I 5.s 5.s S.s <br />Chloride m /I 1 5 3 <br />Conductivit umhoslcm Tao Teo 7e0 <br />Co er, dissolved m /I <br />Hardness ~ m I as 32a 255 <br />H droxide m /I <br />Iron, dissolved m /I 0.05 O.oS o.os <br />Iron, total m /I 0.1 3.09 o.e3 <br />Lead, dissolved m /I <br />Lead, total m /I <br />Ma nesium, dissolved m /I 7 2a.4 22.7 <br />Man anese, dissolved m /! 0.007 0,007 0.007 <br />Man anese, total m /l o.3a o.oa <br />Mercu total m 11 <br />Mol bdenum, dissolved m /I <br />Nitrate as N ,dissolved m /I <br />Nitrate/Nitrite as N m /I 0.36 0.12 <br />Nitrite as N ,dissolved m /I <br />H lab SU 8.3 8.3 e.30 <br />Phos hate m /I 0.11 0.11 o.tt <br />Phos horns Ortho ,dissolved m /I 0.037 0.01 t <br />POta551Um, dIS501Ved m /1 3.6 3.6 3.6 <br />Selenium, dissolved m /I <br />Selenium, total m 11 <br />Sodium Abso lion Ralio SAR talc. 0.72 t.35 1.2 <br />Sodium, dissolved m /I 15.5 54 41.1 <br />Sulfate m /I 10 90 66 <br />TDS Ratio talc. <br />TDS Calc. m !I <br />TDS m !I 170 440 354 <br />TSS m 11 <br />Zinc, dissolved mg/I <br />'Baseline, WY 2000, and WY 2001 data ada ted from WWE. <br />ACZ -ACZ Laboratories, Inc., Steamboat S rin s, CO <br />Ne alive values denote readin s below lab detection levels <br />NM -Not Measured <br /> <br />West Elk Mlne <br />C-13 2005 Annual Hydrology Report HydroGeo, Inc. <br />