REP14584

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 4/25/2003
• Doc Name: 2002 AHR Appendix A Thru D
• From: Mountain Coal Company
• To: DMG
• Annual Report Year: 2002
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Upper North Fork (USGS)
Surface Water quality and Field Parameters

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Mountain Coal West Elk Mine
Monitoring Location N. Fork Upper (USGS) Baseline 2002 Water Year
Desai tion Units Minimum Maximum Mean 4!23/2002 6!18!2002 9!10!2002
Field Parameters
FIoW cfs NM NM NM
Electrical Conductivi umhos/cm 176 158 178
H SU 8.32 8.52 6.89
Tem erature oC 16.9 10.9 15.3
Comment
Laborato Parameters
Name of Certified Lab ACZ ACZ ACZ
lab Reference # L37001-02 L37347-02 L38407-07
Sam le Date 4/3o/2D02 6/18/2002 9110/2oD2
Lab Test Date 6/21-7/29 9/11-9/25
Sam led B GV GV GV
Alkalini Total CaCO3 m /I 31 62 67
Aluminum, dissolved m /I 0.07 0.05 -0.03
Anions me /I 0.6 1.3 1.7
Arsenic, dissolved m /I
Arsenic, total m /I 0.001 0.001 0.001 -0.0005 -0.0005 -0.001
Bicarbonate m /I 40.9 167 81.3 62 67
Boron, dissolved m /I -0.01 0.01
Cadmium, dissolved m /I -0.003 -0.003 -0.005
Calcium, dissolved m I 11.7 18.6 16.4
Carbonate m /I -2 -2 -2
Cation -Anion Balance m I 20 3.7 -13.3
Cations me /I 0.9 1.4 1.3
Chloride m /I 10 3 1 2 1
Conductivi umhos/cm 76 241 169 91 130 149
Co er, dissolved m /I 0.01 0.01 0.01 -0.01 -0.01 -0.01
Hardness !I 40 107 70 37 59 52
H droxide m /I •2 -2 -2
Iron, dissolved m /I 0.38 0.09 0.09 0.04 0.05
Iron, total m /I 26.3 1.6 1.04 0.26 0.3
Lead, dissolved m /I 0.02 0.01 -o.o4
lead, total m /1 0.0006 0.0004
Ma nesium, dissolved m /I 2 3.4 2.9 1.9 3 2.8
Man anese, dissolved m /I 0.009 0.006 0.006 -0.005 -0.005
Man anese, total m /I 0.19 0.04 0.021 0.011 0.023
Mercu ,total m /I -0.0002 -0.0002 -0.0002
Mol bdenum, dissolved m /I -0.01 -0.01 0.01
Nitrate as N ,dissolved m /I
Nitrate/Nitrite as N m /I 0.19 0.06 -0.02 0.35 -0.02
NiVite as N ,dissolved m /I
H SU 6.7 9 7.8 7.3 78 7.5
Phos hate m /I -0.03 -0.03
Phos horns Ortho ,dissolved m /I 1.61 0.12 -0.005 -0.005 -0.005
Potassium, dissolved m /I 0.4 0.7 0.7
Selenium, total m /I -o.DOZ -0.002 -0.002
Sodium Absor lion Ratio SAR talc. 0.2 1.62 0.5 0.23 0.32 0.34
Sodium, dissolved m /I 3.4 5.7 4.6 3.2 5.6 5.6
Sulfate m /I 70 10 -10 -10 20
TDS Ratio talc.
TDS Calc. m /I
TDS m /I 30 650 109 90 90 80
TSS m /I 636 55 20 -5 8
Zinc, dissolved m /I -0.01 -0.01 -0.01

ACZ -ACZ Labs, Steamboat S rin s, Colorado
* Standard is for reference ur ses onl
NA - not a livable NM -not measured NR -not re orted

West Elk Mine
C-1 2002 Annual Hydrology Report HydroGeo, Inc.