REP43087

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 9/16/2004
• Doc Name: 2003 Annual Hydrology Report Appendix A Through C
• From: Hydro Geo Inc
• To: DMG
• Annual Report Year: 2003
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Lower Minnesota Creek (USGS)
Surtace Water (luality and Field Parameters
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Mountain Coal West Elk Mine
Monitoring Location L. Minnesota Ck (USGS) Baseline 2003 Water Year
Descri lion Units Minimum Maximum Mean 4/12/2003 6/3/2003 9/i8/2003
Field Parameters
Flow cfs USGS USGS USGS
Electrical Conductivi umhos/cm 623 t97 479
H SU 7.46 7.82 8.37
Tem erature oC 38.6 51.9 59.5
Comment
Laborato Parameters
Name of Certifed Lab ACZ
Lab Reference # L47507-09
Sam le Date 6/3/2003
Lab Test Date 6/6-6/17
Sam led B
Alkalini Total CaCO3 m /I
Aluminum, dissolved m /I
Anions me /I
Arsenic, dissolved m /I
Arsenic, total m /1
Bicarbonate m /I a6 75 so
Boron, dissolved m /I
Cadmium, dissolved m /I
Calcium, dissolved m /I t9.6 19.6 19.6
Carbonate m /I
Cation -Anion Balance m /I
Cations me /I
Chloride m /I 2 t
CondUCtivi umhos/cm 152 803 350 159
Co er, dissolved m /I
Hardness m /I 65 106 82
H droxide m /I
Iron, dissolved m /I 0.23 0.58 0.41 0.77
Iron, total m /I 0.45 82 8.9 6.89
Lead, dissolved m /I
Ma nesium, dissolved m A 6.7 8.7 7.4
Man anese, dissolved m /I 0.013 0.015 0.014
Man anese, total m /I 0.018 1.83 0.188
Mercu ,total m A
Mol bdenum, dissolved m /I
Nitrate as N ,dissolved m A
Nitrate/Nitrite as N m A
Nitrite as N ,dissolved m /I
H SU 7.9
Phos hate m /I
Phos horns Ortho ,dissolved m /I
Potassium, dissolved m /I
Selenium, total m /I
Sodium Absor lion Ratio SAR talc. o.3 0.5 0.4
Sodium, dissolved m /I 7.7 7.7 7.7
Sulfate m /I 20 50 a0
TDS Ratio talc.
TDS Calc. m /I
TDS m /I 100 584 231 100
TSS m /I t6 t300 292 202
Zinc, dissolved m /I

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

West Elk Mine
C-6 2003 Annual Hydrology Report HydroGeo, Inc.