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MICROBICS MICROTOXID TOXICITY TEST TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may alsobe referredto as PFOS, FC-95, or as a component of FC-201 F-X. (1Octanesulfoniaccid)(CAS # 2795-39-3).

ACUTE TOXICITY TO FISH (MUMMICHOG) TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatmea;y alsobe referredto as PFOS, FC-95,or as a component of FC-203C and L-5440. (1-Octanesulfoniaccid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecapfoltuaosrsoi-u,m salt,CAS # 2795-39-3) Remarks: The 3M productionlotnumber was not noted.The test sample isFC-203C and isreferredto by thetestinglaboratoryas "81-1/8".

ARRRE 3436 ~~ 40 ~ 000380 | "LL \ ARBRE -- 3436 CoB 800 LEVELS TH FENNES TRANSFERRED ou oF TEFLON | AGE a32 21 33 u 2 27 wv u 2 Do a 2. zn = = = LCE-A8VILNEGVETLEFWLHOENN 0.140 0.152 0.570 1.300 0.110 0.110 0.078 2.400 5.100 0.08 0.210 0.190 0.05 ous 0.2% 0.0 0.019 2.50 LCE-A8VILNEGVETLEFALFOTNER 0.086 0.120 0.390 0.980 0.08 0.00 0.065 2.0m sa00 0.083 0.200 0.110 0.01 oan 0.210 0.09 0.01 2.6m BNEUTMWBEEERNOSFWDPALYESS 143 12 140 126 128 ws 148 1s 126 us 130 wr M 127 127 16 TM ml -8% BCLHOAONDGELEIVNELS 1.5 -38.6 -3L.6 -24.6 "21s a -16.7 "16 137 12a Et "105 as "es Yt 0.0 0.0 ao WERE = 129 dys 5. 70 * The dommuard trend 1s statistically significant at 0.05 level using the paired-t toot, a127n1/0

3M 3M Corporate Toxicology and 3M Center .

loa) OECD 414-OPPTS 870.3700 Pilot Study 418-023A FINAL PILOT REPORT SANITI ZED DEC 0 9 2003 ORAL (GAVAGE) DOSAGE-RANGE DEVELOPMENTAL TOXICITY STUDY OF POTASSIUM PERFLUOROBUTANE SULFONATE (PFBS) 6lRATS SPONSOR'S STUDY NUMBER: T-7485.1 I Author Raymond G.

Jean B.

"McCrea, Deborah" <mccrea@taftlaw .com> 10/29/2009 10 :08 AM To NCIC OPPT@EPA cc "Bilott, Robert A."

~a~-- 3I 1-k Company Sanitized .

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).

CAS Number 1763-23-1,29081-56-9,70225-14-8,2795-39-3,29457-72-5 /3M Company 4/27/2000 Voluntary Use and Exposure Information Prof*de PerfluorooctaneSulfonicAcid and Various SaltForms I.

BODICOD resultstorFC-94-X (U sWt ofPFOS) I BIODEGRADATION TEST SUBSTANCE Identity:PerfluorooctanesulfonatLei,thiumsalt;may alsobe referredto as PFOS Lisalt,FC-94, or FC-94-X. (1-Octanesulfonicacid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecaflliutohriou-ms,alt, CAS # 29457-72-5) Remarks: The testsample isa mixtureofthe testsubstance inwater (approximately24.5% testsubstance and 75.5% water).No calculations were made to adjustforthe actualconcentrationofthe testsubstance in the testsample.

i---- I PFOS@ A 96-Hour StaticAcute ToxicityTest with the I SaliwateTMysid (Mys@dopsisbahia) i f@@j - II PFOS: A 96-HOUR STATIC ACUTE T03UCITY TEST WITH THE SALTWATER MYSID Wysidopsis bahia) FINAL REPORT WILDLIFE INTERNATIONAL LTD.