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Lower Deep Creek Surface Water Quality and Field Parameters • • I • Mountain Coal West Elk Mine Monitoring Location L. Deep Creek Baseline 2002 Water Year Descri lion Units Minimum Maximum Mean 4/29/02 6/19/02 9/27/02 Field Parameters Flow cfs NM NM NM Electrical Conductivi umhos/cm 120 Sao 246 258 397 a01 H SU 8.1 8.8 8.5 7.75 8.0 8.08 Tem eralure oC 0.1 16.4 10 14.4 9.6 5.2 Comment O.G.=0.25' Laboreto Parameters Name of Certified Lab ACZ Lab Reference # L37330-03 Sam le Date 6/19/2002 Lab Test Date 6/21-7/14 Sam led B Gv Alkalini Total CaCO3 m /I 61 183 126 142 Aluminum, dissolved m !I 0.03 0.02 0.04 Anions me /I 1.8 3.2 2.5 3.3 Arsenic, total mil 0.0005 Bicarbonate m /I 65 173 132 142 Boron, dissolved m /I 0.01 Cadmium, dissolved m /I -0.003 Calcium, dissolved m /I 18.6 46.8 31.9 41.7 Carbonate m !I 12 2 -2 Cation -Anion Balance m /I •6.7 -2.9 -4.8 4.3 Cations me /I 1.7 2.8 2.25 3.6 Chloride m /I 2 1 2 Conductivi umhos/cm 162 270 216 331 Co er, dissolved m /I -0.01 Hardness m /I 59 156 110 129 H roxide m /I -2 Iron, dissolved m /I 0.03 0.43 0.23 0.08 Iron, total m /I 0.11 5.83 1.68 0.45 Lead, dissolved m /I 0.0007 Ma nesium, dissolved m /I 3.1 7.5 5.4 s Man anese, dissolved m /I 0.009 0.005 O.D14 Man anese, total m /I 0.16 0.04 0.04 Mercu ,total m /I -0.0002 Mol bdenum, dissolved m /I -0.01 Nitrate/Nitrite as N m /I 0.1 0.03 -0.02 H SU 6.5 8.20 7.4 8.2 Phos hate m /I 0.08 0.09 0.09 -0.03 Phos horns Ortho ,dissolved m /I 0.32 0.007 -0.005 Potassium, dissolved m /I 0.8 1.1 1 1.2 Selenium, total m 11 -0.002 Sodium Absor lion Ratio SAR talc. 0.59 1.32 0.94 0.89 Sodium, dissolved m /I 12.3 31.4 21.6 23.1 Sulfate m /I 30 19 20 TDS Ratio talc. TDS Calc. m ll TDS m /I 90 250 165 220 TSS m /I 448 93 24 Zinc, dissolved m /I -0.01 ACZ Labs, Steamboat S rin s, Colorado ' Standard is for reference ur oses onl NA - not a livable NM -not measured NR -not re orted West Elk Mine C-16 2002 Annual Hydrology Report HydroGeo, Inc.