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Spring 13-2 Water duality and Field Paremeters • • Mountain Coal West Elk Mine Monitoring location Spring 13.2 Baseline 2005 Water Vear DBSCri lion Units Minimum Maximum Mean 5/11/2005 6/6/2005 9/19/2005 Field Parameters flow m 17.8 5.01 0.18 Electrical Conductivity µmhos/Cm 497 563 620 H SU 6.63 678 7.24 Tem erature °F a2.5 as.a as.o Comment was 2a-3-C Laborato Parameters Name of Certifed Lab ACZ Lab Reference # L5155a-07 Sam le Date 6l6/2005 Lab Test Date 6/9-6/29 Sam led B Alkalinity (Total CaCO~) mgll 155 Aluminum, dissolved m ll -0.03 Anions me /I 3.7 Arsenic, dissolved m /I Arsenic, total m /I -0.0005 Bicarbonate m /I 155 Boron, dissolved m !1 0.02 Cadmium, dissolved m /I -0.005 Calcium, dissolved m /I 37.0 Carbonate m /I -2 Cation -Anion Balance m /I 1.a Cations me /l 3.8 Chloride m /I 2 Conductivity µmhos/cm 375 Co er, dissolved m /I -0.01 Hardness m /l 126 H drozide m /I -2 Iron, dissolved m /I o.02 Iron, total m /I o.oa Lead, dissolved m /I -o.oa Ma nesium, dissolved m /I 6.7 Man anese, dissolved m /I -0.005 Man anese, total m /I -o.oos Mercu ,total m /I -0.0002 Mol bdenum, dissolved m /I -0.01 Nitrate as N ,dissolved m /I Nitrate/Nitrite as N m /I o.11 Nitrite as N ,dissolved m /I H $U 8.1 Phos hate m /l -0.03 Phos horns Ortho ,dissolved m /I -0.01 Potassium, dissolved m /I 1.4 Selenium, dissoloved m /I Selenium, total m /I -0.001 Sodium Abso lion Ratio SAR talc. 1.13 Sodium, dissolved m /I 29.0 Sulfate m fl 30 TDS Ratio talc. 1.14 TDS Calc. m /I 201 TDS m /I 230 TSS m /I 6 Zinc, dissolved mg/I -0.01 ACZ Laborato , Steamboat S rin s, Colorado Ne alive values denote readin s below lab detection levels NA • not a livable NM -not measured NR -not re orted West Elk Mlne E-3 2005 Annual Hydrology Report HydroGeo, Inc.