REP35905

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 4/17/2007
• Doc Name: 2005 AHR Appendix E Thru H
• From: Hydro Geo Inc
• To: DRMS
• Annual Report Year: 2005
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Sprng G-28A
Water duality and Field Parameters

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Mountain Coal West Elk Mine
Monitoring Location Spring G-28A Baseline 2005 Water Year
Descfi lion Units Minimum Maximum Mean 5/4/2005 6/6/2005 9/13/2005
Field Parameters
Flow m 0.66 0.23 Wet
Electrical Conductivity µmh05/cm 959 7098
H SU 7.31 7.37
Tem erature °C °C
Tem erature °F °F 62.5 6z.o
Comment
Laborato Parameters
Name of Certified Lab AC2
Lab Reference # L51554-01
Sam le Dale s/s/2005
Lab Test Date s/s-s/zz
Sam led B
Alkalinity (Total CaCO3) mg/I
Aluminum, dissolved m /1
Anions me /I
Arsenic, dissolved m /I
Arsenic, total m ll
Bicarbonate m /I 338 aoo 367.4
Boron, dissolved m /l
Cadmium, dissolved m /I
Calcium, dissolved m /I
Carbonate m /I
Cation -Anion Balance m /I
Cations me /I
Chloride m /I 5 1o s
Conductivity µmhos/cm 1600 1600 1600 977
Co er, dissolved m /I
Hardness m /I 162 654 338
H droxide m /I
Iron, dissolved m /I 0.03
Iron, total m /I 0.06 1.12 0.526 0.76
Lead, dissolved m /I
Ma nesium, dissolved m /I
Man anese, dissolved m /I
Man anese, total m /I 0.02 0
Mercu ,total m /I
Mol bdenum, dissolved m /I
Nitrate as N ,dissolved m /I
Nitrate/Nitrite as N m /I 0.21 0.132
Nitrite as N ,dissolved m /I
H SU 7.9 7.9 7.9 8.2
Phos hate m /I
Phos horns Ortho ,dissolved m /I
Potassium, dissolved m /I
Selenium, total m /I
Sodium Abso lion Ratio SAR talc.
Sodium, dissolved m /I
Sulfate m /I sa 550 7ss.a
TDS Ratio talc.
TDS Calc. m /I
TDS m / 420 1100 581 630
TSS m /I 68
Zinc, dissolved mg/I

ACZ Laborato , Steamboat S tin s, Colorado
Ne alive values denote readin s below lab detection levels
NA - not a licable NM -not measured NR -not re orted

West Elk Mine
E-22 2005 Annual Hydrology Report HydroGeo, Inc.