SRPT T-6295.8, T-6889.1, T-6316.4 DTI 5-A 3M MEDICAL DEPARTMENT, CORPORATE TOXICOLOGY Title; Inter-Species Comparison of Mechanisms Fluorochemicai Toxicity following Intraperitoneal dosing of perfluorooctanesulfonate (PFOS, T-6295) or ammonium perfluorooctanoate (APFO, T-6889) in Rats and Guinea Pigs and oral dosing of N-ethyl perfluorooctanesulfonamido ethanol (N-EtFOSE, T-6316) in Rats.

h AIW-oHii BIOSEARCH, INC.

ft R W 6 - O M H 5 SrtduAfoud BIO-TEST laJymJjwM,, She. 1810 F R O N T A G E R O A D N O R TH B R O O K .

Internal Correspondence /tfU U -o M ia To: P .

y L\ ^ * DuPont Haskell VFn. f.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, D.C. 20460 MG 8 2000 Mr.

t AR226-2037 w jv M v>uivv^mUi^.w iw^s1'^ v| * . :.

4r* 226-2047 Roger J Zipfel 07/27/2001 01:30 PM To: John E Crum/SE/DuPont@DuPont cc: Ta-W ei Fu/CL/DuPont@DuPont Subject Re: C-8 sampling Q John, this is very perplexing information.

ofrsos6aia 1 On 'S.

AR226-2219 EXD294947 Stock Parameters 1823A 815D 813D 1353A Pre-Existing 614A 614A 781 1553 2365A Seimworks Application Seiiiiworka Application Seimworks Application Sciniworks Application ' Vcni IDT61ZCE consists o f 18 onc-foot diameter vents.

AR226-2327 A ir Em issions M odeling Plan A ir dispersion modeling will be performed to calculate ambient ground-level air concentrations o f C8 emissions from the Chambers Works site.

Z-47 REV. 10-50 PB W A S H IN G T O N W O R K S P .O .

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.

RECYCLED erno AR226-2662 Precise Research.

AR226-2910 E.