AR226-2184 EXPOSURE EVALUATION FOR NEW PROCESS AT FAYETTEVILLESITE Prepared by DuPont Engineering Technology Debbie Klulrooney Cathie Barton August 20,2001 CAB000188 EID547037 TABLE OF CONTENTS i Executive Summary 1.

BIOACCUMULATION (ANALYTICAL ONLY) TEST SUBSTANCE Identity:Perfluorooctanesulfonylamido(ethyl)acmeatyatael;sobe referredtoas PFOSAA, FC-128 oras themajor component of FC-127, FC-129, FC-109,or FC-109-X.

Biochemical Toxicology DuPont Haskell Laboratory for Health and Environmental Sciences 10 October, 2001 NC33 Sr cn CD Ol f\J RECEIVED DRAFT Page 1 of 10 EID166599 G K 004797 * Abstract A simple and conservative compartmental model was developed to relate ammonium periluorooctanoate (APFO) exposures to estimates of perfluorooctanoate (PFO) concentrations in human blood.

AR226-2186 EXPOSURE EVALUATION FOR NEW PROCESS AT FAYETTEVILLE SITE Prepared by DuPont Engineering Technology Debbie Mulrooney Cathie Barton August 20, 2001 EID293775 TABLE OF CONTENTS Executive Summary 1.

7 7 DuPont Haskell Global Centers for Health and Environmental Sciences 1090 Elkton Road, P.O.

US EPA OPPT AR226-0951 duPont material safety data sheet on Zonyl BA Concentration (ppm) in rat liver PFOA PFDA C12 Dav 1 0.16 1.69 1.20 0.117 0.029 Dav 14 0.016 1.36 1.20 0.085 0.035 Dav 28 <.003 2.24 0.81 0.101 0.036 *Gava

The vapor phase scavenging coefficients used were based on calculations by DuPont which were submitted under the Consent Order.

El DuPont de Nemours Company.

The vapor phase scavenging coefficients used were based on calculations by DuPont which were submitted under the Consent Order.

AR226-2184 EXPOSURE EVALUATION FOR NEW PROCESS AT FAYETTEVILLE SITE Prepared by DuPont Engineering Technology Debbie M ulrooney C athie Barton August 20,2001 CABO00X88 EID547037 TABLE OF CONTENTS Executive Sum m ary 1 .

- ^o<x< ^ DRAFT Modeling of the Leaching Potential of MoM Mark R Russell Modeling and Environmental Risk Assessment DuPont Crop Protection January 31,2002 I.

Tonnage: In 2022, DuPont calculated it introduced less than 60 tonnes of PTFE and 8 tonnes of PFPE and fluorosilicones combined due to commercial industrial sales of PFAS containing lubricants.

The internal standards used were a dual labeled PFOS where two '*0 molecules were included in the sulfonate group (internal standard, >99% purity, synthesized by Research Triangle Institut, Research Triangle Park, NC) and a dual labeled PFOA molecule, where the carboxyl and alpha carbons were labeled with C stable isotope (greater than 97%, provided by DuPont, Wilmington, DE).

CHLOR-ALKALI PROCESS EFFICIENCY: A BALANCING ACT How to select the right membrane to maximize chlor-alkali process efficiency EXECUTIVE SUMMARY Following a rich history--dating back to 1892--the chlor-alkali process has evolved to favor membrane technology due to economic and environmental considerations.

Attain-ooGI BIOACCUMULATION (ANALYTICAL ONLY) TEST SUBSTANCE______________ Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonicadd, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks: The test substance is a white powder.