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Lower Minnesota Creek (USGS) Surface Water Guality and Field Parameters u I• Mountain Coal Weat Elk Mine Monitodn Location L. Mlnnesote Ck (USGS Baseline 2001 Water Year Descd tlon Units Minimum Maximum Mean 4/262001 624/2001 9/292001 Field Parameters Fk1w C1S NM NM NM Electrical Corlductlvi umhos/cm 340 160 190 H SU 8.5 8.3 6.1 Tem refute OC 16.7 18.8 19.7 Comment 1.C=0.00 I.G--1.06 I.G=0.82 Laborato Paremetera Name of CeNOed Lab - ACZ Lab Reference ff L32666-07 Sam le Date 62412001 Lab Test Date 627.7/17 Sam led B ~~ R.H. Alkalln' Otal CaCO3 m Aluminum dissolved m Anions m "~ Arsenic dissolvetl m Arsenic, total m Bicarbonate m ~ 46 75 s0 Boron, dissolved m Cadmium dissolved Calcium dissovetl m 19.6 79.8 19.6 Carbonate m Cation -Anton Balance m Cations m Chloride m ~ 2 1 ConduCtivi umhos/cm 752 603 350 191 Co er dissolved m Hardness m 65 106 82 H droxlde m Iron dissolved m 0.23 0.56 0.41 0.05 Iron total m 0.45 82 6.9 1.14 Lead dissolved m Ma nesium dissolved m ~ 6.1 6.7 7.4 Man enese dlss0lVad m 0.013 0.015 0.014 Man nese total m 0.018 1.83 0.188 Menu total m Mol enum, dissolved m Nitrate as N dissolved m NltrateMitdte as N m Nltdte es N dissolved m H SU e.t Phas hate m Phos horns Onho dissolved m Potassium dissolved m Selenium, total m Sodium Abso tion Ratio SAR talc. 0.3 0.5 0.4 Sodium dissolved m 7.7 7.7 7.7 Sulfate m 20 50 40 TDS Rett0 talc. TDS Calc. m TDS m 100 564 231 120 TSS m 16 1300 292 30 Zinc dissolved m ACZ Labs Steamboat S do s Coloratlo Standard is for reference u oses on NA - not a Ilcable NM • not measured NR -not re ones West Elk Mlne C-6 2001 Annual Hydrology Report HydroGeo, Inc.