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

Spring CR-12
Water Quality and Field Parameters
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Mountain Coal West Elk Mine
Monitoring Location Spring CR-12 Baseline 2005 Water year
Descri ti0n Units Minimum Maximum Mean 5/4/2005 6/6/2005 9/13/2005
Field Parameters
Flow m 9 9.5 1.56
Electrical Conductivity µmhos/cm 374 1533 1731
H SU 7.97 8.25 8.83
Tem erature °C °C
Tem erature °F °F 52.2 55.9 64.4
Comment
Laborato Parameters
Name of Certified Lab ACZ
Lab Reference # L51525-07
Sam le Date sls/2oo5
Lab Test Date s/a-6/23
Sam led B
Alkalinity (Total CaCO3) mg/I
Aluminum, dissolved m /I
Anions me /I
Arsenic, dissolved m /I
Arsenic, total m /I
Bicarbonate m /l
Boron, dissolved m /I
Cadmium, dissolved m /I
Calcium, dissolved m /I
Carbonate m /I
Cation -Anion Balance m ll
Cations me /1
Chloride m /I
Conductivity µmhos/cm 1270
Co er, dissolved m /I
Hardness m /I
H droxide m /I
Iron, dissolved m /I 0.02
Iron, total m /I 0.39
Lead, dissolved m /I
Ma nesium, dissolved m /I
Man anese dissolved m /I
Man anese, total m /I
Mercu ,total m /I
Mol bdenum, dissolved m /I
Nitrate as N m /I
Nitrate/Nitrite as N m /I
Nitrite as N m /I
H SU 8.5
Phos hate m /I
Phos horns Ortho ,dissolved m /1
Potassium, dissolved m /I
Selenium, total m /I
Sodium Abso lion Ratio SAR talc.
Sodium, dissolved m /I
Sulfate m /1
TDS Ratio talc.
TDS Calc. m /I
TDS m /I 800
TSS m /I 18
Zinc, dissolved m9/I

ACZ Laborato , Steamboat S rin 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-20 2005 Annual Hydrology Report HydroGeo, inc.