Document qdD0ega3kgXBQY7D8rX3w0qKK

AR226-2589 BEST COPY AVAILABLE ASH027845 WHOLE DOCUMENT EID781125 EID781125 ASH027a46 EID781126 EID781126 -- v m s .. ...rf./l&;-,<.y"'*Ni-l'! ,s -j;,..., Site^l Bedrock - - Permian Dimkard Group - Shales, sandstones, siltstones, minor limestones Alluvium - Pleistocene "-, , 1 glacial outwash d&posits f i- coaree sands and gravels S- "^i&,: ?: predominant valley fill sediments ^'l^i^^^r,terrace levels in the river valley i@|^^y:trl^ tfae center of the river valley (more fmes) during sub ^^^^""'^liiiygggradadonevents ASH027848 EID781128 EID781128 ASH027849 EID781129 EID781129 'l,l^l'" ASH027851 EID781131 10781131 ASH027852 EID781132 EID781132 Aiwlr^f \i ^^,,-_ ^K --< -w.-M-- M"0 --4 , R!.3 (~\ ^1^ ^ 0 ^ o ^ ^ B -3 I ^ P-l '^ S--( -"( o (D 0 TJ s ^ o a u ^ ^ < ^ < ^ cu M n ^ ^ ^ ^ ^ - - p <; bfc ASH027853 EID781133 EID781133 EPA /ACOE Modeled Stage of Ohio River " - Previous model above normal pool elevation - 5N1^.';a| - Revised to normal pool elevation (582 ft. above MSlJ^^^gi^ Recharge Rates -- Previous model - 11 in./yr. across domain - Revised zonation based on surficial sediment distribution Les were estimated and adjusted during calib tirJIyor daily pumping rates from the DuPont, Lit data available) --- ^:,-.^..%-?y%-.^il',Xy. .... .,:.-^^:-.- ppA JUJL jTl. / / A F O F Jr^L\_/^_/JL/ r r i n t r ^ S v^UJLAAJJLji5al@|a Boundary Conditions ; [ - Previous model - north edge of domain ende^l - Revised: Domain extended to cover entire Ohio River basin betwe^n'l-l * No-flow boundaries coincide with bedrock divides ;.' Ohio Riverbed Conductance Previous model - conductance based on very low K of riverbed ' -, .';;. 1-' Revised: B& 3..-' ^^.i I^^^CoK^uctance based on riverbed K -10% of expected Kv of underly '""""^.^^.g'l:^;.- "-:,; '" - , . INlii^^.- ss*t:^t|;^.; . jglttSAS'T" i'A . ';''>'.':- Primary Data Sources fei| RFI Report, DuPont, 1999 -- lithologic data -- groimdwater elevation data -- aquifer testing data Simard, 1989, Geologic History of the Lower Terraces Upper Ohio River Valley, West Virginia Geological Survey Open^ -- Lithology, thickness, and depositional history of the Ohio River alluvial. -- Historical low water levels of the Ohio River and Mathes, 2001, Aquifer-Characteristics Data for W -Resources Investigations Report 01-4036 r^ixdtauKc conductivity data ie'rates Investigation Reports laaag and Lubeck ASH027857 EID781137 EID781137 ASH027858 EID781138 EID781138 ASH027859 E1D781139 EID781139 ASH027860 EID781140 EID'781140 ASH027861 EID781141 EID781141 ASH027862 EID781142 EID781142 ASH027863 EID781143 EID781143 ASH027864 EID781144 EID781144 ASH027865 EID781145 EID781145 ASH027866 EID781146 EID781146 ASH027867 EID781147 EID781147 ASH027868 EID78U48 EID781148 ASH02'7869 EID781149 EID781149