FirstChemical Corporation A DuPont Company PASCAGOULA BASELINE STUDY/REPORT FOR FIRST CHEMICAL CORPORATION PASCAGOULA, MISSISSIPPI Date: October 2006 Project No.: 18984786.06051 508800 Pascagoula Baseline Study/Report Table of Contents TABLE OF CONTENTS Executive Summary............................................................................................................1 1.0 Introduction.................................................................................................................1 1.1 Background on PFOA and PFOS......................................................................1 1.2 Report Content.................................................................................................. 2 2.0 Pascagoula Region Water and Solids Sampling........................................................ 3 2.1 Introduction and Background........................................................................... 3 2.2 Water and Solids Field Sampling..................................................................... 3 2.2.1 Surface Water and Wastewater Sampling........................................... 3 2.2.2 Potable and Industrial Water Sampling............................................... 5 2.2.3 Groundwater Sampling........................................................................ 5 2.2.4 Pascagoula POTW Sludge Sampling.................................................. 6 2.3 Laboratory Analysis and Data Review - Water and Solid Samples.................6 2.4 Discussion of Analytical Results...................................................................... 8 2.4.1 Surface Water...................................................................................... 8 2.4.2 Groundwater........................................................................................ 9 2.4.3 Pascagoula POTW Sludge..................................................................10 2.5 General Occurrence of PFOA in the Water and Solids...................................10 2.5.1 Discussion of PFOA Concentrations in Fresh Water.........................10 2.5.2 Discussion of PFOA Concentrations in Salt Water............................11 2.5.3 Discussion of PFOA in Waste Water Treatment Facilities................11 2.6 Summary of Water and Solids Field Sampling...............................................11 3.0 Pascagoula Region Fish and Invertebrate Sampling.................................................13 3.1 Introduction and Background..........................................................................13 3.2 Fish and Invertebrate Field Sampling..............................................................13 3.2.1 Selected Fish Sampling......................................................................13 3.2.2 Selected Invertebrate Sampling..........................................................14 3.3 Laboratory Analysis and Data Review - Fish and Invertebrate Samples.......14 3.4 Discussion of Analytical Results for Fish and Invertebrates..........................15 3.4.1 Fish.....................................................................................................15 3.4.2 Invertebrates.......................................................................................16 3.5 General Occurrence of PFOA in Fish and Invertebrates.................................16 3.5.1 Discussion of PFOA Concentrations in Saltwater Fish......................16 3.5.2 Discussion of PFOA Concentrations in Marine Invertebrates...........17 3.5.3 Bioaccumulation Discussion..............................................................17 3.6 Summary of Invertebrates and Fish Field Sampling.......................................18 4.0 References.................................................................................................................19 S:\Groups\URS\WP\Pascagoula\508800 Baseline Study\Report\FCC BaselineStudyRpt.doc October 2006 i Pascagoula Baseline Study/Report Table of Contents Table 1a Table 1b Table 2 Table 3a Table 3b Table 4 Table 5 TABLES PFOA Summary Water Samples PFOS Summary Water Samples PFOA and PFOS Summary of Solids Sample PFOA Summary Biological Samples PFOS Summary Biological Samples Summary of Background Information on PFOA from the Literature Cited in This Report Biological Sample Sizes Figure 1 Figure 2 FIG URES Baseline Study Sampling Locations Groundwater and Storm Water Sample Locations Appendix A Analytical Data APPEN DICES S:\Groups\URS\WP\Pascagoula\508800 Baseline Study\Report\FCC BaselineStudyRpt.doc October 2006 ii Pascagoula Baseline Study/Report Acronyms ACRONYMS Acronym APFO BCF BAF COC DuPont FCC LC/MS/MS LOD LOQ MDEQ MDL MDMR MS ND NQ Pg/Kg Pg/L ng/g NERR PBS PFOA PFOS POTW Ppb PQL QAPP QC RPD SNUR SOP STL SWPPP WWTP Definition / Description Ammonium perfluorooctanoate Bioconcentration Factor Bioaccumulation Factor Chain of Custody E.

P-1 "McCrea, Deborah" <mccrea@taftlaw.com> 0 3 /0 6 /2 0 0 9 02:34 PM To N C IC O P P T @ E P A cc "Bilott, R obert A." < bilott@ taftlaw .com > bcc S ubject Subm ission to E P A -H Q -O P P T -20 03-0 01 2 Taft / Deborah McCrea / Legal Assistant Taft Stettinius & Hollister LLP 425 Walnut Street, Suite 1800 Cincinnati, Ohio 45202-3957 Tel: 513.381.2838 Fax: 513.381.0205 www.taftlaw.com / mccrea@taftlaw.com A d -^ -Q - Internal Revenue Service Circular 230 Disclosure: As provided for in Treasury regulations, advice (if any) relating to federal taxes that is contained in this communication (including attachments) is not intended or written to be used, and cannot be used, for the purpose of (1) avoiding penalties under the Internal Revenue Code or (2) promoting, marketing or recommending to another party any transaction or matter addressed herein.

INTERIM REPORT #19 - Analysis of Ground Water Samples STUDY TITLE Analysis of Perfluorobutanesulfonate (PFBS), Perfluorohexanesulfonate (PFHS), and Perfluorooctanesulfonate (PFOS) in Water, Soil, Sediment, Fish, Clams, Vegetation, Small Mammal Liver and Small Mammal Serum Using LC/MS/MS for the 3M Decatur Monitoring Program DATA REQUIREMENTS EPA TSCA Good Laboratory Practice Standards 40 CFR 792 STUDY DIRECTOR Jaisimha Kesari P.E., DEE Weston Solutions, Inc. 1400 Weston Way West Chester, PA 19380 Phone: 610-701-3761 INTERIM REPORT COMPLETION DATE March 19,2007 PERFORMING LABORATORY Exygen Research 3058 Research Drive State College, PA 16801 Phone: 814-272-1039 STUDY SPONSOR 3M Company 3M Building 0236-01-B-10 St.

INTERIM REPORT #26 - Analysis of Groundwater Samples STUDY TITLE Analysis of Perfluorobutanesulfonate (PFBS), Perfluorohexanesulfonate (PFHS), and Perfluorooctanesulfonate (PFOS) in Water, Soil, Sediment, Fish, Clams, Vegetation, Small Mammal Liver and Small Mammal Serum Using LC/MS/MS for the 3M Decatur Monitoring Program DATA REQUIREMENTS EPA TSCA Good Laboratory Practice Standards 40 CFR 792 STUDY DIRECTOR Jaisimha Kesari P.E., DEE Weston Solutions, Inc. 1400 Weston Way West Chester, PA 19380 Phone: 610-701-3761 INTERIM REPORT COMPLETION DATE January 9, 2007 PERFORMING LABORATORY Exygen Research 3058 Research Drive State College, PA 16801 Phone: 814-272-1039 STUDY SPONSOR 3M Company 3M Building 0236-01-B-10 St.

M zz - 07S3 BIODEGRADATION (BOD/COD) TEST SUBSTANCE____________________________________________ Identity: Mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-203CF-X or FC-203CF. (1-Octanesulfonic acid) (CAS # 2795-39-3).

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ARA.G _ 0 0 5 ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE Identity: A mixture containing perfluorooctanesulfonate, may also be referred to as PFOS, FC-95, or as a component of FC-3072. (1Octanesulfonic acid) (CAS # 2795-39-3).

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