Document N2EdReXX6gOGepNDazgw7zj1D

AR226-2630 18 AR226-2630 DuPont Modeling Methodology and Results Dordrecht Site June 2003 About the Model I Industrial Source Complex Short Term 3 (ISCST3) I Sold/used globally, including in The Netherlands http://www.phoenix-r.co.jp/products/products.htm I Input I Stack height, diameter I Flowrate, temperature I Mass of pollutant (mass per time) I Local meteorological data (Rotterdam, 1996 - 2000) I Output I Ambient air concentrations in ug/m3 I Max values and locations outside the property line Prevailing wind Facility Ambient annual ground level concentration in ug/m3 Model Calculations I Ambient air concentrations based on Gaussian Equation I Concentration a function of a vertical term and a dispersion term I Vertical term based on stack height, receptor elevation, plume rise, mixing I Dispersion parameters describe distribution of pollutant in lateral and vertical Dordrecht Plant Site Dordrecht Modeling Inputs Stack Parameters PTFE Stack Height (m) 20.95 Stack Diam. (cm) 140 Stack Velocity (m/s) 3.2 Stack Exit Temp. (C) 54 Emission Rate (kg/yr) 149 FEP 30.0 40 1.3 73 191 Preliminary Modeling Results I Maximum concentrations calculated as 0.057 ug/m3 I Well below goal of 1.0 ug/m3 I Point of maximum concentration at northern boundary of site (on property line, along shoreline)