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Well SOM3-B Water Quality and Field Parameters • i Mountain Coal West Elk Mine Monitoring Location Well SOM 3-B Baseline 2003 Water Year Desvd tivn Units Minimum Maximum Mean 9/30/2003 Field Parameters Water Level De th feet Bailin Electrical Conductivi umhos/cm 3240 H SU 7.03 Tem eralure oC 70.2 Comment Laborato Parameters Name of Certified Lab ACZ Lab Reference # L43179-06 Sam le Date 9/30/2003 Lab Test Date 10/2-10/29 Sam led B Alkalinit Total CaCO3 m /I 1240 Aluminum, dissolved m ll Ammonia m /I -0,01 Anions me /I 35.2 Arsenic, dissolved m /I 0.002 Arsenic, total m /l Bicarbonate m /I 1240 Boron, dissolved m /I 7.58 Cadmium, dissolved m /I -0.01 Calcium, dissolved m ll 37.7 Carbonate m /I -2 Cation -Anion Balance % a.1 Cations me /I 38.2 Chloride m /I 70 Conductivi umhos/cm 2860 Co er, tlissolved m /I Hardness m /I 153 H droxide m /I -2 Iron, dissolved m /I 13.6 Iron, total m /I 223 Lead, dissolved m I -0.08 Ma nesium, dissolved m /I 14.2 Man anese, dissolved m /I 0.93 Man anese, total m /I 2.59 Mercu , dissolvetl m /l -a.o0o2 Mercu ,total m /I Mol bdenum, dissolved m /I •0.2 Nitrate/Nitrite as N m /I 0.8 Nitro en, ammonia m 11 7.8 H SU 0.86 Phos hate m /I 0.28 Phos horns Ortho ,dissolved m /I 8.5 Potassium, tlissolved m /I -0.001 Selenium, dissolved m /I Selenium, total m /I 27.5 Sodium Abso lion Ratio SAR talc. 773 Sodium, dissolved m /I 400 Sulfate m /I 1.1 TDS Ratio talc. 2070 TDS Calc. m A 2280 TDS m /I TSS m /I 2.33 Zinc, dissolved m /I ACZ -ACZ Labs, Steamboat S rin s, Coloratlo ' Standard is for reference ur oses onl NA - not a livable NM -not measured NR -not re orted West EIk Mine G-20 2003 Annual Hydrology Report HydroGeo, Inc.