3M ENVIRONMENTAL LABORATORY REPORT NO.

GLP10-01-02.

AR12&-0IOX DIETARY ACUTE MALLARD DUCK STUDY : -W TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 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.

'aceAnalytical F ie ld Services Division 3 Prepared by: Pace Analytical Services, Inc.

COVAH^ THE DEVELOPMENT SERVICES COMPANY Sponsors: APME Ad-Hoc APFO Toxicology Working Group FINAL REPORT Study Title: 26-Week Capsule Toxicity Study with Ammonium Perfluorooctanoate (APFO) in Cynomolgus Monkeys Author: Peter J.

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3M General Offices 3M Center F St.

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RECEIVED OPPT NCIC AR sa6 - /g T elomer Research Program 1200 South Hayes Street Arlington, Virginia 22202-5050 Tet (703)413-1100 ext 5364 Fac (703)4138111 Clan ant February 14, 2003 Mary F.

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70 PP AR226-1534 DUPONT TELOMER MANUFACTURING SITES: ENVIRONMENTAL ASSESSMENT OF PFOA LEVELS IN AIR AND WATER RECEIVED OPPT NCIC 2003 OCT-15 AM 8:10 Date: September 2003 Project No.: 508501 18983843.00003 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 DuPont Telomer Manufacturing Sites: Environmental Assessment of PFOA Levels In Air and Water Table of Contents TABLE OF CONTENTS Executive Summary.......................................................................................................... iv 1.0 Introduction.................................................................................................................1 1.1 Chambers Works...............................................................................................1 1.2 Washington Works........................................................................................... 2 2.0 Data Analysis and Analytical Reporting....................................................................3 3.0 Air Dispersion Modeling.............................................................................................4 3.1 chambers Works - ISC3 Modeling Methodology and Results....................... 4 3.1.1 Emission Source Information...............................................................4 3.1.2 Modeling Methodology.......................................................................4 3.1.3 Modeling Results................................................................................. 4 3.2 Washington Works - Screen3 Modeling Methodology andResults..................6 3.2.1 Data and Modeling Procedures............................................................6 3.2.2 Modeling Results................................................................................. 8 4.0 Chambers Works Groundwater Sampling..................................................................9 4.1 Background....................................................................................................... 9 4.2 Regional Geology............................................................................................ 9 4.3 Site Geology..................................................................................................... 9 4.4 Site Hydrogeology........................................................................................... 10 4.5 Sample Location Selection...............................................................................11 4.6 Sampling Activities and Results..................................................................... 11 4.7 Summary of Results....................................................................................... 12 5.0 Chambers Works Surface Water Sampling.............................................................. 14 5.1 Site Effluent Sample Results............................................................................14 5.2 Chambers Works and Upstream Surface Water IntakeResults........................14 5.3 Delaware River Surface Water Sampling........................................................15 5.3.1 Delaware River - Discussion of Results..............................................16 5.4 Salem Canal......................................................................................................17 5.5 Summary of Results......................................................................................... 17 6.0 Conclusions............................................................................................................. 18 7.0 References............................................................................................................... 19 EnvironmentalAssessment.doc Oct. 1,03 Wilmington, DE i DuPont Telomer Manufacturing Sites: Environmental Assessment of PFOA Levels In Air and Water Table of Contents Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 TABLES CATT Established Screening Levels.........................................................vi Summary of Air Dispersion Modeling Results......................................... vi Summary of Groundwater Sampling Results-ChambersWorks............... vi Summary of Surface Water Sampling Results-Chambers Works............ vi Chambers Works Stack Parameters and Emission Rates............................5 Chambers Works Building Heights............................................................ 5 Chambers Works Site Air Dispersion Modeling Results............................6 Chambers Works Telomers Operations Air Dispersion Modeling Results6 Washington Works GEP Stack Heights......................................................7 Chambers Work Groundwater Analytical Results................................... 12 Chambers Works Outfall DSN001 Results............................................. 14 Chambers Works Surface Water Intake Results...................................... 15 Chambers Works Delaware River Sampling, June 9, 2003........................ .....................................................................................

Enclosure 3 Removal of PFOA with Granular Activated Carbon 3M Wastewater Treatment System Monitoring There are many factors that can influence the adsorption of a chemical constituent onto activated carbon.

BACK TO MAIN 3M FLUOROCHEMICAL SUBMISSION TOXICOLOGY, EPIDEMIOLOGY AND MEDICAL SURVEILLANCE September 2005 Click on Study Title to View Report September 28, 2005 POSF 90-day Inhalation Toxicity Study: a.

AR226-1523 FINAL REPORT RECEIVED OPPT NCIC 03 SEP 30 PM1:00 PROTOCOL 418-028 ORAL (GAVAGE) COMBINED REPEATED DOSE TOXICITY STUDY OF T-7706 WITH THE REPRODUCTION/DEVELOPMENTAL TOXICITY SCREENING TEST SPONSOR'S STUDY NUMBER: T-7706.1 FINAL REPORT DATE: 31 JULY 2003 PROTOCOL 418-028 - ORAL (GAVAGE) COMBINED REPEATED DOSE TOXICITY STUDY OF T-7706 WITH THE REPRODUCTION/DEVELOPMENTAL TOXICITY SCREENINGTEST SPONSOR'S STUDY NUMBER: T-7706.1 TABLE OF CONTENTS SUBJECT 1.