Document 3JVBm7vqdN17D7B70wwwgrpm3

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 I 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 Modeled Site Building Vent Property Line Modeling Inputs - Stack Parameters Actual Stack Height (m) Stack Diam. (cm) Stack Velocity (m/s) Stack Exit Temp. (C) 11.26 20 24.7 100 Modeling Inputs - Emission 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 Jun = 0.18 Mar = 0.17 Jul = 0.08 Apr = 0.2 Aug = 0 Seepptt==00 Occtt== 00..111 Noovv== 00..225 Dec = 0.15 Sample Calculation of Monthly Factor : 1/2/2003 1 1/3/2003 iOifcOO- 16:00 hours; '7 0&00- 16-00 hours 7 3136 ! 3136 : : 1/6/2003 '0800- 16:00 hours: 7: 3136 : : 1/7/2003 108:00- 16:00 hours' 7, 3136 : : ; 1/8/2003 ! 08:00- 1600 hours; r 3136 1 :; 1/9/2003 0800- 16:00 hours; 7 3136 ; f""i/ioaoo3' '0800- 1600 hours ^. 3136 , i 1/13/2003 ; 0800 -ll-.W hours: 12 5376 ; ; 1/14/2003 ; 08:00 - 22:00hours 12 5376 . ; 1/15/2003 : 0800-22:00 hours. 12 5376 ; [ 1/16/2003 [0800- 22:00 hours; 12 5376 ; 1 1/17/2003 '0800- 22:00 hoar? 12. 5376 : ; ; 1/20/2003 ;' Tfll/2o63 ?00-22:00 hours; 12, 5376 ; '0800-22:00 hours "12' ... ...^^.....^... ,,,,,,,....,,,. ; 1/22/2003 !0800- 16:00 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 Preliminary Modeling Results 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 I Reference report at http://www.dep.state.wv.us/Docs/4505 JF[NAL_CATT_REPOR T_8-02.pdf Community Exposure Guideline (CEG) In the early 1990's DuPont established a Community Exposure Guideline (CEG) of 0.3 ugyWfor 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 Scale in ug/m3 -200 -150 -100 -50 0 50 100 150 200 250