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 G-35
Water duality antl Field Parameters
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Mountain Coal West Elk Mine
Monitoring Location Spring G-35 Baseline 2005 Water Year
Descri tics Units Minimum Maximum Mean 5/5/2005 6/6/2005 9/13/2005
Field Parameters
Flow m 4.66 2.4 Wet
Electrical Conductivity µmhos/cm 17a 1320
H SU 7.08 7.25
Temperature (°C) °C
Tem eralUre (° °F q8.4 57.3
Comment
Laborato Parameters
Name of Certifed Lab ACZ
Lab Reference # L51554-03
Sam le Date 6/6/2005
Lab Test Date 6/9fi/22
Sam led B
Alkalinity (Total CaCO,) mg4
Aluminum, dissolved m 0 0.04 0.04 O.Oa
Anions me A
Arsenic, dissolved m A
Arsenic, total m ll
Bicarbonate m /l 313 440 363.6
Boron, dissolved m /I
Cadmium, dissolved m A
Calcium, total m ll
Calcium, tlissolved m A
Carbonate m 4
Cation -Anion Balance m 0
Cations me A
Chloride m A 2 14 10.4
Contluctiviry µmhoslcm 1030 1130 1080 1100
Co er, dissolved m /I
Hardness m /l 234 Se6 439
H droxide ~ m /I
Iron, dissolved m /I - 0.02 0.03 0.025 -0.01
Iron, total m /I 0.02 1.2 0.28 0.30
Lead, dissolved m /I
Ma ne5lum, dissolved m /I 85.4 65.4 65.4
Man anese, dissolved m A
Man anese, total m /I 0.07 0.01
Mercu .total m /l
Mol denum, dissolved m /I
Nitrate as N m /I
Nitrate/Nitrite as N m /l 0.28 0.53 ~ 0.394
Nitrite as N m /l
H SU 7.7 7.9 7.75 8.1
Phos hate m /I
Phos horns Ortho ,tlissolved m /l
Potassium, dissolvetl m /l
Selenium, total m A
Sodium Abso lion Ratio SAR talc. 0.91 0.92 0.915
Sodium, dissolved m A
Sulfate m /I 22a 2a4 255.8
TDS Ratio talc.
TDS Calc. m /I
TDS m /I 598 974 731 720
TSS m /I 16 a 26
Zinc, dissolved m /l
Zinc, total mgA

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-26 2005 Annual Hydrology Report HydroGeo, Inc