Document 253y6qZGw6a191bzr20Zg2M5

RECYCLED "I AR226-2630 00 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) 1 Output l 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 M odeling Inputs Stack Param eters PTFE S t a c k H eight (m) 20.95 S ta c k Diam. (cm) 140 S t a c k V e lo c ity (m/s) 3.2 S t a c k E x it Tem p . (C) 54 E m issio n R ate (kg/yr) 149 FEP 30.0 40 1.3 73 191 Prelim inary Modeling R e s u lts 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)