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Spring 26-1 Water Quality and Field Parameters r r 1 L J Mountain Coal West Elk Mine Monitoring Location Spring 26-1 Baseline 2003 Water Year Descri lion Units Minimum Maximum Mean 4/13/2003 6/4/2003 9/27/2003 Field Parameters Flow m 2.3s z.aa o.ss Electrical Conductivi umhos/cm 240 6ao a82 918 825 1074 H SU 7.3 8.1 7.7 7.45 7.63 7.03 Tem erature oC 1.4 7.2 6 44 44.6 47.2 Comment Laborato Parameters Name of Certified Lab ACZ Lab Reference # L41507-04 Sam le Date 6/4/2003 Lab Test Date 6/5-6/16 Sam led B Alkalini Total CaCO3 m /I 151 284.000 222.000 228 Aluminum, dissolved m /1 0.04 Anions me /I 5.1 5.9 5.5 7.8 Arsenic, dissolved m A Arsenic, total m /I -0.0005 Bicarbonate m /I 151 284 222 228 Boron, dissolved m /I 0.03 Cadmium, dissolved m /I -0.005 Calcium, dissolved m /I 24 37.2 31.5 49.7 Carbonate m /I -2 Cation -Anion Balance m /I 1 3.3 2.15 -2 Cations me /I 5.2 6.3 5.75 7.5 Chloride m /I 2 6 4.4 3 Conductivi umhos/cm 480 548 514 632 Co er, dissolved m /I -0.01 Hardness m /I 81 126 105 167 H droxide m /I -2 Iron, dissolved m /I 0.01 Iron, total m /I 1.45 0.24 0.18 Lead, dissolved m /I 0.0003 Ma nesium, dissolved m /I 5.1 8 6.7 10.3 Man anese, dissolved m /I -0.005 Man anese, total m /I 0.028 0.004 -0.005 Mercu ,total m /I -0.0002 Mol bdenum, dissolved /I -0.01 Nitrate as N m /I 0.14 Nitrate/Nitrite as N m /I 0.14 0.31 0.19 0.14 Nitrite as N m /I •0.01 H SU Z1 7.7 Za 7.9 Phos hate m /I Phos horns Ortho ,dissolved m !I 0.007 0.001 0.01 Potassium, dissolved m /I 1.2 1.4 1.3 1.4 Selenium, total m /I 0.001 0.001 -0.001 Sodium Absor lion Ratio SAR talc. 2.8 4.96 3.96 3.23 Sodium, dissolved m /I 57.2 125 94.5 94.8 Sulfate m /I 40 80 63.1 150 TDS Ratio talc. 0.94 TDS Calc. m /I aa7 TDS m /I 220 410 327 420 TSS m /I 16 4 8 Zinc, dissolved m /I 0.02 0.01 -0.01 ACZ -ACZ Laboreto Steamboat S rin s Colorado Standard is for reference u oses onl NA - not a livable NM -not measured NR -not re orted West EIk Mine E3 2003 Annual Hydrology Report HydroGeo, Inc.