Document pe5yR3y1Ywk8pRrZRvdMJ7Yzk

! O .K h DuPont Modeling Methodology and Results DRAFT Shimizu Site June 2003 CAB000375 EID719411 06/02/03 cs ! ! About the Model Industrial Source Complex Short Term 3 (ISCST3) Sold/used globally, including in Japan http://www.phoenix-r.co.jp/products/products.htm Input Stack height, diameter Flowrate, temperature Mass of pollutant (kilogram per hour) Local meteorological data (Shizouka 1997, 98, 99) Output Ambient air concentrations in ug/m3 Max values and locations outside the property line 000042 Prevailing wind Facility Vapor reaches Ambient annual ground level concentration in ug/m3 Model Calculations Ambient air concentrations based on Gaussian Equation Concentration a function of a vertical term and a dispersion term Vertical term based on stack height, receptor elevation, plume rise, mixing Dispersion parameters describe distribution of pollutant in lateral and vertical WO 000  ' in MH on ; Mg I sg ! o Ul WJ <0 N 1-- _ \ ; Shimizu Site All sources in this area J CM I - SMIMCU WOWS % H U P1 0 T P W * C E G CALCULATE j ou our-M ireu n u o m o c x h c a i* co i t o *' 0 M2J 1M M Shimizu Modeling Inputs Stack Parameters Source ID 1 2 3 4 D e s c rip to n Pre-scrubber exit for fine powder scrubber (called "AC Scrubber" on m ap) Post-scrubbBr exit for fine powder scrubber (called "AC Scrubber" on m ap) DBC Scrubber M P -2 scrubber Location D Plant D Plant E Plant: copolymer plant for P FA arid FEP M P -2 building: copolym er type micro powder Operations Operates 24 hours per day, 180 days per year Operates 24 hours per day, 180 days per year Operates 24 hours per day, 270 days per year Operates 24 hours per day, 200 days per year Height, m 8 15 18.2 161 VV Diam eter, m 0 .6 8 (,) 0.6 0.6 10.6 assum ed r- Flowrate m 3/hr Temp 2400 100 C 9600 40-50 C 1620 40 C 7500 40 C assumed (1 ) G iven in em ail o f 4 /1 7 /0 3 from H id e laka Hirom alsu: 6 0 0 sq m m sq uare diam elfar. C onverted to effective d ia m e te r o f 0 .6 8 m eters. vOOOO Correct stack height? Shimizu Modeling Inputs Emissions Rates Source ID Description Pre-scrubber exit for line powder scrubber (called "AC Scrubber" 1 on map) Location D Plant Emission Rate, Emission kg/hr Rate, g/s 0.24 0.0667 Post-scrubber exit for fine powder scrubber (called "AC 2 Scrubber" on map) D Plant 0.24 3 DBC Scrubber E Plant: copolymer plant for PFA and FEP 0.07 0.0667 0.0194 4 MP-2 scrubber MP-2 building: copolymer type micro-powder 0.125 0.0347 Preliminary Modeling Results Maximum annual concentrations calculated as 14 ug/m3 Point of maximum concentration at south boundary of site (on property line) CO CONTOUR RESULTS FROM MODEL CAB000383 EID719419 OOQOo i ? w Contribution of Sources Source ID 1 2 QO 4 Description Pre-scrubber exit for fine powder scrubber (called "AC Scrubber'1on map) Post-scrubber exit for fine powder scrubber (called "AC Scrubber'1on map) Location Contribution, Height, m u g /m 3 Contribution, % D Plant 8 7.002 50 D Plant 15 3.345 24 DBC Scrubber MP-2 scrubber E Plant: copolymer plant for PFA and FEP MP-2 building: copolymer type micro- 18.2 16.1 2.953 0.771 total = 14.071 21 5