Document bZr0JBXOjLXk7x3OqB9Gq7QZ

AR226-2631 19 AR226-2631 DuPont Modeling Methodology and Results Netherlands Site September 2004 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 1 Input I Stack height, diameter . I Flowrate, temperature I Mass of pollutant (mass per time) I Local meteorological data (Eindhoven, 1997 - 2001) I Output I Ambient air concentrations in ug/m3 I Max values and locations outside the property line 1 M odeled Site Building Vent Property Line A M odeling Inputs - S ta ck Param eters Actual S t a c k H eig ht (m) S ta c k Diam. (cm) S t a c k V e lo c ity (m/s) S t a c k E x it Tem p . (C) 11.26 20 24.7 100 M odeling Inputs - Em ission Rate Stack emissions given as 448 grams per hour Created Monthly Emissions Factor using spreadsheet from Nick Hopper Accounts for less than 24 hours of operation, less than 365 days per year of operation during each month: Jan = 0.2 May = 0.08 Feb = 0 M ar = 0.17 Apr = 0.2 Jun = 0.18 Jul = 0.08 Aug = 0 Sept = 0 O ct = 0.11 Nov = 0.25 D ec = 0.15 Sam ple Calculation of Monthly Factor : DailyMass Monthlymass Morthiy factor, : ofEmissions,^ ofemissions, assuming448 Dates 1/2/2003 Tines worked ;Hrs 0800- 1600 hours. 7. 301n3s6 1/3/2003 0800- 1600 hours 7 3136 1/6/2003 0800- 1600 hours; 1 3136 1/7/2003 ;08O0- 1600 hours' 7: 3136 1/8/2003 0800- 1600 hours' 7; 3136 1/9/2003 0800- 1600 hours? 7 3136 1/10/2003 0800- 1600 hours 1 3136 1/13/2003 i0800 - 22:00 hours? 12 5376 1/14/2003 0800 - 22:00 hours 12 5376 1/15/2003 0800-22:00 hours: 12 5376 1/16/2003 0800 - 22:00 hours: 12 5376 1/17/2003 0800-22:00 hours' 12 5376 /20/2003 ;0800- 22:00 hours: 12 5376 1/21/2003 0800- 22:00 hours 12 i r t i 1/22/2003 0800- 1600 hours 7. 3136 62720 ; 0.2 If operation ran continuously at 448 gms/hr for January, monthly emissions would be 448 g/hr * 24hrs * 31 days = 333, 312 gms for Jan Calculate a January factor = 62720 actual/333, 312 if continuous = 0.2______________ 3 Prelim inary Modeling R e s u lts I Maximum annual average concentrations calculated as 0.74 ug/m3 I Point of maximum concentration at Northeastern boundary of site (on property line) I Assumed no rain cap Screening Values I Screening level used at US plant site for permit compliance = 1 ug/m3 I Represents reference concentration for inhalation health protection i Developed by team of independent toxicologists in 2002 1 Reference report at http://www.dep.state.wv.us/Docs/4505_FINAL_CATT_REPOR T_8-02.pdf Com m unity Exposure Guideline (CEG) In the early 1990's DuPont established a Community Exposure Guideline (CEG) of 0.3 ug/m3for the inhalation pathway. I A CEG is an exposure guideline established by DuPont's Haskell Laboratory. I The CEG assumes a 24-hour lifetime exposure by all, including the most sensitive individuals, in an exposed community population. I Exposure above the CEG will not necessarily result in any adverse effects. Annual Average Concentrations