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Upper North Fork (USGS) Surface Water Guality and Field Parameters ~~ i i• Mountain Coal West Elk Mine Monitorin Location N. Fork Up er (USGS) Baseline 2001 Water Year Descri lion UniLS Minimum Maximum Mean 4/29/2001 6/24/2001 9/282007 Field Parameters Flow cfs Electrical Conductivi umhos/cm 770 40 720 H SU 8.1 8.3 6.3 Tem erature oC 9.8 12.2 8.7 Comment I.G.=3.83' I.G.=3.00' I.G.=2.27' Laborato Parameters Name of Certified Lab - ACZ Lab Reference ri L34747vs Sam le Date 9/28/2001 Lab Test Date 702-10/25 Sam led B RH Alkalini otal CaCO3 m 1 Aluminum, dissolved m Anions m Arsenic dissolved m Arsenic, total m 0.007 0.007 0.001 Bicarbonate - m 40.9 767 81.3 Boron, dissolved m Cadmium, dissolved m Calcium, dissolved m Carbonate m Cation -Anion Balance m Cations me Chloride m 10 3 Conductivi umhOS/Cm 76 241 169 150 Co er, dissolved m 0.07 0.01 0.01 Hardness m 40 107 70 H droxide m I Iron, dissolved m I 0.3a 0.09 0.02 Iron, total m I 26.3 1.6 0.17 Leatl, dissolved m 0.02 0.07 Ma nesium, dissolved m 2 3.4 2.9 Man 8nese, dissolved m 0.009 0.006 Man anese, total - m 0.19 0.04 Mercu ,focal m 1 Mol bdenum, dissolved m Nitrate as N ,dissolved m Nitrate/Nitrite as N m I 0.19 0.06 Nftrite as N ,dissolved m I H SU 6.7 9 7.8 7.9 Phos hate m Phos horns Ortho , dissOlvetl m 1.61 0.72 Potassium, dissolved m Selenium, total m Sodium Absor tion Ratio SAR CaIC. 0.2 1.62 0.5 Sodium, dissolved m 3.4 5.7 4.6 Sulfate m 70 f0 TDS Ratio talc. TDS Calc. m TDS m I 30 650 709 700 TSS m I 636 55 -5 Zinc, dissolved m AAL. Inc -American Assa Laboratories, Inc., S arks, Nevada ' Standard is for reference -u oses onl NA - not a licable NM -not measured NR -not re ortetl West Elk Mine C-1 2001 Annual Hydrology Report HydraGeo, Ine.