ATTACHMENT TO LETTER OF JANUARY 30, 2002 3M FLUOROCHEMICAL SUBMISSION Back to Main Menu TOXICOLOGY, EPIDEMIOLOGY AND MEDICAL SURVEILLANCE STUDIES PFOS Perfluorooctanesulfonate Repeat Dose Studies 1.

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1060 Proceedings of the 49th ASMS Conference on Mass Spectrometry and Allied Topics, Chicago, Illinois, May 27-31, 2001 Determination of Anionic Perfluorinated Surfactants by LC ESI MS Melissa M.

^PRO 1 AZ 1 2 6 - I07Z UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, D.C. 20460 MAR 1 1 2002 OFFICE OF PREVENTION, PESTICIDES AND TOXIC SUBSTANCES Dear Interested Party: Attached please find copies of two related documents that published in today's Federal Register: a Final Rule (67 FR 11008) on 13 known discontinued perfluoroalkyl sulfonate (PFAS) chemicals making any new manufacture or importation a significant new use; and a Supplemental Proposed Rule (67 FR 11014) on 75 additional chemicals, proposing to exclude from the definition of "significant new use" specifically defined, low volume, controlled exposure uses in semiconductor manufacture, aviation hydraulics, and photography, but to otherwise require submission of a significant new use notice (SNUN) for any manufacture or import of these chemicals after December 31, 2002.

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2003 JUL- 7 AM10:59 \ # f(f0 2 May 2003 ?.

6; . m-78 A Simple, Conservative Compartmental Model to Relate Ammonium Perfluorooctanoate (APFO) Exposure to Estimates of Perfluorooctanoate (PFO) Blood Levels in Humans Paul M.

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........................ .....................................................................................

31 October 2003 To: Mary F.