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Upper Deep Creek SuMace Water ~ualliy and Fleld Parameters L~ r~ I• Mountain Coal West Elk Mine Monitodn Location U. Dee Creek Baseline 2001 Water Year Descri lion Units Minimum Maximum Mean 5/2/01 6/25/01 9/28/01 Fleld Parameters Flow cis NM NM 0.03 Electrical Conductivi umhos/cm 90 370 192 90 250 250 H SU 8.1 8.8 8.5 8.1 8.5 8.9 Tem erature oC 0.2 18.6 t0 9.5 14.7 12.5 Comment O.G: 0.98 O.G: 0.66 Laborato Parameters Name of Certified Lab ACZ Lab Reference # L32666-i6 Sa Ie Dale 6/25/2001 Lab Test Date 6/27.7/17 Sam led B R.H. Alkalini otal CaCO3 m 760 103 151 Aluminum dissolved m -0.03 Anions me 1.5 2.6 2.05 3.2 Arsenic, total m I -O.ooas Bicarbonate m 53 753 7os tab Boron dissolved m •0.01 Cadmium, dissolved m -0.0007 Calcium, dissolved m to 4a.4 26.7 47.b Carbonate m 9 1.3 5 Cation -Anion Balance m -3.4 -2 -2.7 3 Cations m ~ 1.4 2.5 1.95 3.4 Chloride m 2 0.23 t COndUCtivi ~ Umhos/cm 139 242 190.5 286 Co er, dissolved m •0.01 Hardness m a7 73a s7 12a H roxide m -2 Iron, dissolved m 0.02 0.04 0 0.02 Iron, total m 0.14 9.43 2.63 0.58 Lead, dissolved m I •o.ooot Ma nesiUm, dissolved - m I 2.6 6.6 4.62 s Man anese, dissolved m I 0.007 0.0035 •0.005 Ma anese total m O.005 0.282 0 0.024 Mercu total m -0.0002 Mol bdenum dissolved m -0.07 NitrateMitdle as N m o.os O.o1 o.2s H SU 6.9 8.00 7.45 8.3 Phos ate m 0.12 0.2 0.16 0.05 Phos horns Ortho ,dissolved m 0.065 0.013 0.017 Potassium, dissolved m I o.7 7.2 o.s5 o.a Selenium, total m I -0.007 Sodium Abso lion Ratio SAR talc. ~ 0.32 0.77 0.6 0.75 Sodium, dissolved m 1 7.9 20 13.8 79.5 Sulfate m 30 10.8 70 TDS Ratio talc. 0.99 TDS Calc. m 772 TDS m 60 210 133 170 TSS m 1a Zinc, dissolved m -o.ot ACZ Labs, Steamboat S rin s, Colorado ' Standard is for reference u oses onl NA - not a licable NM -not measured NR -not re orted West Elk Mine C-15 2001 Annual Hydrology Report HydroGeo, Inc.