TRADE SECRET AR226-3165 DuPont-2926 Study Title H-24002: Biopersistence Screening 10-Dose Oral Gavage Study in Rats Laboratory Project ID: DuPont-2926 AUTHOR: Carol Finlay, B.A.

AR 426_ 3310 rd -_-- --- TRADE SECRET Study Tie H-25357: BiopersistenceScreening 10-Dose Oral Gavage Study in Rats Laboratory Project ID: DuPont-11557 AR2RE 23/0 Dwupeonic1s55s7 AUTHOR: Carol Finlay, B.A.

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Ta'ft/ Taft Stettinius & Hollister LLP 425 Walnut Street, Suite 1800 / Cincinnati, OH 45202-3957 / Tel : 513 .381 .2838 / Fax : 513 .381 .0205 / www .taftlaw .com Cincinnati / Cleveland / Columbus / Dayton / Indianapolis / Northern Kentucky / Phoenix / Beijing ,4e22- S9r,-) 2- ROBERT A.

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DATA SUMMARY REPORT 2013 DATA SUMMARY REPORT MISSISSIPPI RIVER - POOL 2 AND ADJACENT LOCATIONS Prepared for Brewer Attorneys and Counselors Dallas, Texas Prepared by Anchor QEA, LLC 4300 Route 50, Suite 202 Saratoga Springs, New York 12866 April 2016 2013 DATA SUMMARY REPORT MISSISSIPPI RIVER - POOL 2 AND ADJACENT LOCATIONS Prepared for Brewer Attorneys and Counselors Dallas, Texas Prepared by Anchor QEA, LLC 4300 Route 50, Suite 202 Saratoga Springs, New York 12866 April 2016 TABLE OF CONTENTS 1 INTRODUCTION ................................................................................................................1 2 METHODS ...........................................................................................................................2 2.1 Water Sampling................................................................................................................2 2.1.1 Locations .....................................................................................................................2 2.1.2 Water Sampling Procedures ......................................................................................2 2.1.3 Laboratory Analyses ...................................................................................................3 2.2 Fish Sampling ...................................................................................................................3 2.2.1 Locations .....................................................................................................................4 2.2.2 Fish Sampling Procedures ..........................................................................................4 2.2.3 Fish Processing and Laboratory Analyses .................................................................5 2.3 Porewater and Sediment Sampling .................................................................................5 2.3.1 Locations .....................................................................................................................5 2.3.2 Sediment Sampling Procedures .................................................................................6 2.3.3 Porewater Sampling Procedures................................................................................6 2.3.4 Laboratory Analysis....................................................................................................7 2.4 Quality Assurance/Quality Control ................................................................................7 3 RESULTS ..............................................................................................................................8 3.1 Water ................................................................................................................................8 3.2 Fish Results .......................................................................................................................8 3.3 Porewater and Sediment Sampling .................................................................................9 3.4 Data Validation.................................................................................................................9 3.5 Laboratory Data Reports ..................................................................................................9 4 REFERENCES ....................................................................................................................10 List of Tables Table 1 Summary of Water Sampling Locations Table 2 Fish Sampling Sections Table 3 Summary of Fish Targeted from Pool 2 Table 4 2013 Surface Water Results 2013 Data Summary Report Mississippi River - Pool 2 i April 2016 160945-01.02 Table 5 Table 6 Table 7 Table 8 Summary of Fish Collected from Pool 2 2013 Fish Results 2013 Porewater Results 2013 Sediment Results Table of Contents List of Figures Figure 1 Locations of 2013 Surface Water Samples Figure 2 Locations of 2013 Fish Sampling Sections Figure 3 Locations of 2013 Porewater and Sediment Samples Figure 4 Mississippi River Hydrograph with Sampling Events Figure 5a-k Locations of 2013 Fish Collection Runs List of Appendices Appendix A Minnesota Department of Natural Resources Scientific Collectors Permit Appendix B Data Validation Reports 2013 Data Summary Report Mississippi River - Pool 2 ii April 2016 160945-01.02 ACRONYMS AND ABBREVIATIONS Anchor QEA Anchor QEA, LLC cfs cubic feet per second DSR Data Summary Report PFAS perfluoroalkyl substance PFBA Perfluorobutanoate PFBS Perfluorobutanesulfonate PFDA Perfluorodecanoate PFDoA Perfluorododecanoate PFHpA Perfluoroheptanoate PFHxA Perfluorohexanoate PFHxS Perfluorohexanesulfonate PFNA Perfluorononanoate PFOA Perfluorooctanoate PFOS Perfluorooctanesulfonate PFOSA Perfluorooctane sulfonamide PFPeA Perfluoropentanoate PFUnA Perfluoroundecanoate QA/QC quality assurance/quality control QAPP Quality Assurance Project Plan SAP Sampling and Analysis Plan SOP Standard Operating Procedure TDS total dissolved solids TOC total organic carbon TSS total suspended solids USEPA United States Environmental Protection Agency 2013 Data Summary Report Mississippi River - Pool 2 i April 2016 160945-01.02 1 INTRODUCTION This Data Summary Report (DSR) has been developed by Anchor QEA, LLC, on behalf of Brewer Attorneys and Counselors, to present the results of sampling and analysis activities performed to measure the concentrations of perfluoroalkyl substances (PFASs) in multiple media collected within Pool 2 of the Mississippi River in 2013 and nearby locations as documented in the 2013 Sampling and Analysis Plan (SAP; Anchor QEA 2013).

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28 Day Percutaneous Absorption Study inw'iAeinbirngosRsabbits : 5 Z Srpesinent.

PR226-0225 3M Environmental Laboratory Final Report- Analytical Study Single-Dose Dermal Absorption/Toxicity Study of T-6051 and T-6054 in Rabbits In-Vivo Study Reference Number: HWI#6329-133 TSetsutdySuNbusmtbanecre:: AFMCD-T12-901(3T1-96055.11 and T-6054) `Name and Address of Sponsor: 3M SCD Division 367 Grove Street St.

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BIOACCUMULATION (ANALYTICAL ONLY) TEST SUBSTAN Identity: NN--eEtthyFlOpSeErfAilucoorhooolctoarneFMs-u3lf4o2n2a.mi(d1o-eOtchtanaonle;sumlafoynaamlisodeb,eNr-eeftehryrle-d to as C1,A1S,2#.21,639,13-,49,94.,25),5,6,6,7.7.8,8,8-heptadecafluoro-N-(2-hydroxyethyl)-, Remarks: Material is an off-white, waxy solidof uncharacterized purity.