REP47787

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 9/13/2002
• Doc Name: 2001 AHR, Intro Thru Appendix D
• From: Mountain Coal Company
• To: DMG
• Annual Report Year: 2001
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Lower North Fork
Surface Water Ouallty and Fleld Parameters

I•
Mountain Coal West Elk Mine
Monitorin Location N. Fork Lower Baseline 2001 Water Year
Descri lion Units Minimum Maximum Mean 4/29/2001 6/24/2001 9/28/2007
Fleld Parameters
Flow CfS 1490 NM NM
Electrical Conductlvi umhos/cm 770 ao 360
H SU 8.7 6.5 6.7
Tem erature oC 9.8 72.3 8.9
Laborato Parameters '
Name of Certified Lab ACZ ACZ
Lab Reference # L32666-7 o L34747-os
Sam le Date 6/24/2007 9/28/2007
Lab Test Date 6/27-7/09 10/2-10/76
Sam led B RH RH
Alkalini otal CaCO3 m
Aluminum dissolved m I
Anions m
Arsenic, dissolved m 1
Arsenic total m I
Bicarbonate m 47 73a 7a
Boron, dissolved m
Cadmium, dissolved m
Calcium dissolved m
Carbonate m
Cation -Anion Balance m I
Gallons me
Chloride m 7.6 5 3.8
Conductivi umhos/cm 723 397
Co er, dissolved m 1
Hardness m 3s.3 tos sa.7
H roxide m
Iron, dissolved m 0.126 0.065 0.03 0.04
IfOn, total m 0.09 3.8 0.92 0.78 0.42
Lead dissolved m I
Ma nesium, dissolved m
Man nese, dissolved m I o.oooz o.os o.o7
Man anese, total m
Mercu ,total m
Mol bdenum, dissolved m
Nitrete as N ,dissolved m
NitrateMitrite as N m
Nitrite as N ,dissolved m
H SU 7 8.8 9.7 7.8 8.4
Phos ate m
Phos horns Ortho ,dissolved m 2.74 0.25
Potassium dissolved m I
Selenium, total m
Sodium Abso lion Ratio SAR talc.
Sodium, dissolved m I '
Sulfate m I 4 25 12
TDS Ratio talc.
TDS Calc. m I
TDS m 1 36 t 80 101 90 250
TSS m I 6.4 107 36 12 8
Zmc, dissolved m

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-2 2001 Annual Hydrology Report HydroGeo, Inc.