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-25
Water quality and Field Parameters
C~

Mountain Coal West Elk Mine
Monitodng Location Spdng G-25 Baseline 2005 water Year
De8cr1 Bon Units Minimum Maximum Mean 5/4/2005 6/fi/2005 9/13/2005
Field Parameters
Flow m 25.75 30.8 0.67
Electrical COndUOlivily µmh05/cm 1840 2390 1772
H SU 6.99 7.09 7.18
Tem rature (°C) °C
Temperature (°F °F 47.2 47.1 60.5
Comment
Laborato Paremeters
Name of Certifed Lah ACZ
Lab Reference # L51554-02
Sam le Date 6/fi/2005
Lab Test Date 6/t3-6/22
Sam led B
Alkalinity (Total CaCO,) mgll
Aluminum, dissolvetl m /I
Anions me
Arsenic, dissolved m A
Arsenic, total m /I
Bicarbonate m A 224 826 573
Boron, dissolved m A
Cadmium, dissolved m
Calcium, total m d
Calcium, dissolved m
Carbonate m
Cation -Anion Balance m
Cations me /I
Chloride m A 2 20 6
Conductivity µmh05/Cm 777 1320 1134 7560
Co er, dissolved m
Hardness m ll 219 1379 514
H droxide m A
Iron, dissolved m 0.135 0.022 -0.07
Iron, total m A 0.99 0.09 -0.07
Lead, dissolved m /I 0.02 0.02 0.02
Ma nesium, dissolved m A 70.9 70.9 70.9
Man anese, dissolved m 4
Man anese, total m /I 0.01 0.002
Mercu ,total m /I
Mo bdenum, dissolved m A
Nitrate a5 N m 0
Nitrate/Nitrite as N m ri 0.19 t.22 0.4
Nitrite as N m
H SU 6.85 8.5 7.44 8.0
Phos hate m A
Phos horns Orlho , dissolvetl m 7.55 O.os
Potassium, dissolved m A
Selenium, dissolved m /I
Selenium, total m A
Sodium Abso lion Ratio SAR talc. 0.49 a.a 2.2
Sodium, dissolved m A
Sulfate m /I 88 325 242
TDS Ratio talc.
TDS Calc. m A
TDS m A 336 1170 843 1030
TSS m A 26 7 -5
Zino dissolved m 4
Zinc, total mgA

ACZ Laborato , Steamboat S do s, Colorado
Ne a0ve values denote readin s below lab detection levels
NA - not a livable NM -not measured NR -not re rted

West Elk Mlne
E-25 2005 Annual Hydrology Report NydroGeo, Inc.