Document qdx4pNVJeGEnyKe9z3ba8Ox3x

AR226-2594 .^ ^y KatherinB L Davis 08/23/2002 11:31 AM To: cc: Subject: Andrew S Hartten/AE/DuPont@DuPont, Mark Houlday/AE/DuPorrtQDuPont, Tobin D Lounsbury/AE/DuPontQDuPont, Michael P ShBrri8r/AE/DuPont@DuPont, J Stephen Opp/AE/DuPont@DuPont. LUcinda M Tilton/SE/DuPont@DuPont Dasher letter response In this letter, George Dasher raises concerns about "increasing concentrations of C-8 in groundwater and surface water" at the main plant (P04-MW02, Q04-MW02 and R04-MW02) and at Letart Landfill A", Cand F-zone wells and asked for possible explanations for the increases and potential ways to reduce the concentrations (remedlatlon systems). I havent started looking at the Letart data yet and I am just starting to work on this but in thinking about a response for the main plant I (with Mike's input) am contemplating the following Info: is C-8 really increasing? C-8 data itself (method changes etc.) well construction data including the new bedrock well detailed cross section through this portion of the plant water level data groundwater model results and observations precipitation/recharge/connection with the river Anything else I should considerf Below is the letter for those who have not seen it yet,.... M ary J Emsllo To; cc: Subject: Andrew S Hartten/AE/DuPontQDuPont Katharine L Davl6/AE/DuPont@DuPont Dasher Letter Andrew, Attached is your letter in PDF format. 08/19/2002 04:05 PM Mary Dasher 9-9-02.PDI EID652542