Document 10O0M5QnmvgeJgbX9OEX5jxmq

AR226-2297 y David M Rurak 02/10/2003 06:52 PM To: cc: Subject: Seiichi Tanaka/PO/DuPont@DuPont Ta-Wei Pu/CL/DuPont@DuPont, Hidetaka Hiromatsu/PO/DuPont@DuPont, Katsunosuke Kitagawa/PO/DuPont@DuPont, Kazuaki Suzuki/PO/DuPont@DuPont, Akito Abe/AE/DuPont@DuPont, Catherine A Barton/AE/DuPont@DuPont Re: CEG Calculation at Shimizu Site D Tanaka-san, Please allow me to clarify a couple of items: 1) First of all, the CEG is not calculated for a plant site. The CEG is a guidance level established by Haskell Labs. 2) There are really two CEG levels; one for water and one for air. 3) We looked at the water concentrations in comparison to the water CEG when Hartten-san visited. 4) For the air, we would only do air modeling to compare air modeling concentrations to the air CEG. The concentrations are too low to detect by measurement. 5) The air modeling would be done by Cathy Barton in Wilmington and would not cost near as much as you are thinking. 6) Cathy can best tell us what data we need, but the meteorological data and geographic data are definitely something that can be used. We also use emission rates, stack highs and velocities, plus building heights, locations, etc. We don't need population density. Hope this helps with our concerns. Best Regards, Dave Seiichi Tanaka y Seiichi Tanaka 02/10/2003 09:20 AM To: OK Subject: David M Rurak/AE/DuPont@DuPont Ta-Wei Fu/CL/DuPont@DuPont, Hidetaka Hiromatsu/PO/DuPont@DuPont, Katsunosuke K"rtagawa/PO/DuPont@DuPont, Kazuaki Suzuki/PO/DuPont@DuPont, Akito Abe/AE/DuPont@DuPont Re: CEG Calculation at Shimizu Site Greetings, Rurak-san As it is listed on the attached minutes of the wrap up meeting with Ta-Wei Fu-san during his last visit to Shimizu in January, I would tike to know your thought whether we should calculate CEG at Shimizu site. Last year QRA was performed for Shimizu site using geografic data, population density, meteorological data and the other data for calculating PHI by engineering department. It took much cost as 20MM\ for developing the dispersion model for the site. I think basically would be calculated by using the similar dispersion model. CEG If we should calculate CEG, could we use the same dispersion model as QRA ? How much cost do EID747521 need for calculation ? 53 0301-Minutes of Meeting with Ta Best Regards, Tanaka EID747522