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Spring 13-4 Water Quality and Field Parameters • CJ C~ Mountain Coal West Elk Mine Monitoring Location Spring 134 Baseline 2005 Water Year DESCfI lion Units Minimum Maximum Mean 5/11/2005 6/6/2005 9/19/2005 Field Parameters Flow m 15.8 0.49 Wet Electrical Conductivity µmhos/cm 331 503 H SU 6.57 6.62 Tem erature °F 41.7 42.8 Comment was 24-3-A Laborato Parameters Name of Certi0ed Lab ACZ Lab Reference # L51554-05 Sam le Dale s/s/loos Lab Test Date 6115-s/27 Sam led 8 Alkalinity (Total CaCO3) mg/I 78 Aluminum, dissolved m /I O.o4 Anions me /I 2.a Arsenic, dissolved m /I -0.0005 Arsenic, total m /I Bicarbonate m /I 78 Boron, dissolved m /I o.01 Cadmium, dissolved m /I -0.005 Calcium, dissolved m /I 30.0 Carbonate m /I -2 Cation -Anion Balance m /I 0.0 Cations me /I 2.5 Chloride m /I 2 Conductivity µmhos/cm 291 Co er, dissolved m /I -0.01 Hardness m /I 1oa H droxide m /I -2 Iron dissolved m /I 0.03 Iron, total m /I 1.04 Lead, dissolved m /I -o.oa Ma nesium, dissolved m /I 7.1 Man anese, dissolved m / -0.005 Man anese, total m /I 0.015 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 -0.02 Nitrite as N ,dissolved m /I H Sll 7.9 Phos hate m /I -0.03 Phos horns Ortho ,dissolved m /I -0.01 Potassium, dissolved m /l 1.3 Selenium, total m /I -0.001 Sodium Abso lion Ratio SAR talc. 0.70 Sodium, dissolved m /I 1s.a Sulfate m /I so TDS Ratio cola 122 TDS Calc. m /l t6a TDS m /I 200 TSS m /I s Zinc, dissolved mg/I -o.ot 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 Eik Mine E-5 2005 Annual Hydrology Report HydroGeo, Inc.