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Upper Deep Creek Surface Water Quality and Field Parameters • • • West Elk Mine C-15 2002 Annual Hydrology Report HydroGeo, Inc. Mountain Coal West Elk Mine Monitoring Location U. Deep Creek Baseline 2002 Water Year Descri lion Uni[s Minimum Maximum Mean 4/29/02 6/19/02 9/27/02 Field Parameters Flow cfs NM NM NM Electrical Conductivit umhos/cm 80 310 192 240 316 303 H SU 8.1 8.8 8.5 7.74 8.24 8.09 Tem erature oC 0.2 18.6 10 14.2 11.4 5.9 Comment O.G.=0.73' Laborato Parameters Name of Certified Lab ACZ Lab Reference # L37330-01 Sam le Date 6/19/2002 Lab Test Date 6/27-7/14 Sam led B GV Alkalini Total CaC03 m /I 160 103 114 Aluminum, dissolved m /I -0.03 Anions me /I 1.5 2.6 2.05 2.3 Arsenic, total m /I -0.0005 Bicarbonate m /I 53 153 106 114 Boron, dissolved m /I -0.01 Cadmium, dissolved m /I -0.003 Calcium, dissolved m fl 14 44.4 28.7 36.9 Carbonate m /I 9 1.3 -2 Cation -Anion Balance m /I -3.4 -2 -2.7 11.5 Cations me /I 1.4 2.5 1.95 2.9 Chloride m /I 2 0.23 2 Conductivi umhos/cm 139 242 190.5 277 Co er, dissolved m /I -O.ot Hardness m /I 47 138 91 113 H droxide m /I -2 Iron, dissolved m /1 0.02 0.04 0 0.06 Iron, total m /I 0.14 9.43 2.63 0.29 Lead, dissolved m /I 0.0003 Ma nesium, dissolved m /I 2.6 6.6 4.62 5 Man anew, dissolved m /I 0.007 0.0035 0.011 Man anew, total m /I 0.005 0.282 0 0.02 Mercu ,total m /I •0.0002 Mol bdenum, dissolved m /I -0.01 Nitrate/Nitrite as N m /I 0.05 0.01 -0.02 H SU 6.9 8.00 7.45 8.1 Phos hate m /I 0.12 0.2 0.16 -0.03 Phos horns ORho ,dissolved m /I 0.065 0.013 -0.005 Potassium, dissolved m /I 0.7 1.2 0.95 t Selenium, total m ll -0.002 Sodium Absor lion Ratio SAR talc. 0.32 0.77 0.6 0.65 Sodium, dissolved m /I 7.9 20 13.8 15.8 Sulfate m /I 30 10.8 -10 TDS Ratio talc. TDS Calc. m /I TDS m /I 60 210 133 180 TSS m /I 12 Zinc, dissolved m /I -O.o1 ACZ Labs, Steamboat S do s, Colorado ' Standard is for reference ur oses onl NA - not a livable NM -not measured NR -not re rted