SEVERN TRENT LABORATORIES ANALYTICAL REPORT JOB NUMBER: 244963 Prepared For: Weston Solutions, Inc. 1400 Weston Way Building 5-2 West Chester, PA 19380-1499 Project: Confidential Decatur - FC Investigation Attention: Sue Stefanosky Date: 03/23/2006 Signature Name: Richard C.

SEVERN TRENT LABORATORIES ANALYTICAL REPORT JOB NUMBER: 244964 Prepared For: Weston Solutions, Inc. 1400 Weston Way Building 5-2 West Chester, PA 19380-1499 Project: Confidential Decatur - FC Investigation Attention: Jai Kesari Date: 03/23/2006 Signature Name: Richard C.

Dr.

mi 3M 3.V1 C.eneral Ottices 3M Center St.

AR226-1030A035 BACK TO MAIN Study Title Microbial Metabolism (Biodegradation) Studies of Perfluorooctane Sulfonate (PFOS) II.

BACK TO MAIN Focus Environmental, Inc.

BACK TO MAIN BIODEGRADATION (Anaerobic Sludge) 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 3M production lot number was 217 (TN-A-2130).

3M General Offices 3M Center St.

New Datatiff AR.&3.6-062.5 Completion of two generation reproductive studies for perfluorooctane sulfonate and EpetFrfOluSoEro, oacntdancerossusl-ffoonsatetreinstgufdoyllow up to Pharmacokinetics during pregnancy studies Second species (rabbit) teratology study Completion of 180 day repeat dose study in primates with one year recovery 3M Medical Department March 7,2000 I Pending Two-year feeding studies EtFOSE - In-life done 4/2000 Perfluorooctane sulfonate - In-life done 4/2000 6 month and one year recovery after 180 day feeding study in primates ADME study in primates 3M Medical Department March 7,2000 Pending Human sera studies Health claims study Update mortality study Mechanistic and metabolic studies 3M Medical Department March 7,2000 3 ResultsFo- sRteerpirnogdSutcutidoines/Cross- N0.O4 EmLg/fkogr/dreopfrpoedruflcutiovreoeonctdapnoeinstuslfonate is Perinatal mortality is predominantly a pup effect rather than a maternal effect Effect on cholesterol metabolism is hypothesized mechanism - studies planned to test hypothesis 3M Medical Department March 7,2000 ResultsD-oPseriSmtuatdeyRepeat 0.15 mg/kg/d well tolerated for 6 months (apparent NOEL) Cholesterol level decreased at perfluorooctane sulfonate serum concentrations greater than 100 ppm (in the high dose group) 2 deaths in males at 0.75 mg/kg/d that were apparently compound relateyd At the high dose (0.75 mg/kg/d) body weight liver weight and liver morphology were affected 3M Medical Department March 7,2000 r Results - Sera Concentrations Perfluorooctane sulfonate serum concentrations increase linearly with dose in l8o3w-1a0n7dpmpmid) dose groups (16-20 ppm and Perfluorooctane sulfonate serum tchoencheinghtradtoisoengs rfooullpows, ewditahbmipahxaimsicumcurvvaeluiens at 250-300 ppm 3M Medical Department March 7,2000 Background "19O6r8ganic fluorine" reported in human sera in 3M medical surveillance from 1976 to present Aconmalpyosuesndfosrdsopseecaiffitcerflu19o9ro2o-rdgeatneicction limit less than 50 ppb in 1997 Mcoocncuutltepimpaltpeiooanrnaaarlllyyysseiesxrpfaroossamemd)hpfilsientsodr(nipcoeanrfn-ludorooctane sulfonate at less than 50 ppb 3M Medical Department March 7,2000 7 Background Various studies, including medical surveillance, done over the last 25 years In the last two years have used outside experts to identify needs and help define studies Have created Scientific Advisory Panel for additional review 3M Medical Department March 7,2000 2 Review - Data in Health Effects Paper ADME Metabolic precursors to perfluorooctane sulfonate Repeat dose feeding studies - rat and primate Genotoxicity Teratology 3M Medical Department March 7,2000 Review - Data in Health Effects Paper (Continued) Cross-sectional study of exposed employees Mortality study at production plant site Irnepterroidmucdtaivtae fsrtoumdy2-generation Interim data from new repeat dose primate study 3M Medical Department March 7,2000 10 Results The additional data does not suggest a health risk associated with the levels of perfluor loctane sulfonate found in the sera of occupationally or non-occupationally exposed employees, blood bank samples or commercially available serum. 3M Medical Department March 7,2000 //

00 f t I Z I O - / H NOTE TO FILE - AR 226/OPPTS 50639 DATE: March 14, 2001 FROM: Karen Lannon SUBJECT: 1/4/01 Meeting with Department of Defense (DoD) concerning Aqueous Film Forming Foam (AFFF) A meeting was held on January 4, 2001 to discuss alternatives to PFOS-based AFFF and possible DoD plans for transitioning away from PFOS-based AFFF.

3IM C orporate Toxicology and Regulatory Services 3M Center, Building 0220-02-E-02 St.

A R 6 - ISOS FEBRUARY 2003 SURFACE WATER MONITORING REPORT FOR WASHINGTON WORKS FACILITY AND LOCAL, LETART AND DRY RUN LANDFILLS WASHINGTON, WV Date: April 2003 Project No.: D6WW7423.01 18983632.00028 18983633.00026 18983634.00026 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 0003S3 NO CBI WVDEP 17572 Surface W ater Monitoring Report Table of Contents TABLE OF CONTENTS 1.0 Introduction...................................................................................................................1 2.0 C-8 Analytical Reporting............................................................................................. 2 3.0 Washington Works Facility.........................................................................................4 4.0 Local Landfill............................................................................................................... 5 5.0 Letart Landfill.............................................................................................................. 6 6.0 Dry Run Landfill.......................................................................................................... 7 7.0 References.................................................................................................................... 8 Table 1.0 Table 2.0 Table 3.0 Table 4.0 TABLES C-8 in Surface Water - Washington Works Facility C-8 in Surface Water - Local Landfill C-8 in Surface Water - Letart Landfill C-8 in Surface Water - Dry Run Landfill Figure 1.0 Figure 1.1 Figure 1.2 Figure 2.0 Figure 2.1 Figure 2.2 Figure 3.0 Figure 3.1A Figure 3.IB Figure 4.0 Figure 4.1 FIGURES Site Location Map - Washington Works Facility Surface Water Sample Location Map - Washington Works Facility C-8 Concentration Map February 2003 - Washington Works Facility Surface Water Site Location Map - Local Landfill Surface Water Sample Location Map - Local Landfill C-8 Concentration Map February 2003 - Local Landfill Outfalls Site Location Map - Letart Landfill Surface Water Sample Location Map - Letart Landfill Rt. 33 Stream and Brinker's Run Surface Water Sampling Locations Letart Landfill Site Location Map - Dry Run Surface Water Sample Location Map - Dry Run Landfill FEB SW M R.doc Apr. 15, 03 Wilmington, DE i 0G03S4 Surface W ater Monitoring Report Table of Contents Figure 4.2 C-8 Concentration Map February 2003 - Dry Run Landfill Outclass Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F APPENDICES Laboratory Analytical Data Reports - Washington Works Facility Chain-of-Custody Records - Washington Works Facility Laboratory Analytical Data Reports - Local Landfill Chain-of-Custody Records - Local Landfill Laboratory Analytical Data Reports - Dry Run Landfill Chain-of-Custody Records - Dry Run Landfill FEB SW M R.doc Apr. 15, 03 Wilmington, DE ii 000385 Surface W ater Monitoring Report Introduction 1.0 INTRODUCTION A multi-media consent order (Order No.

AR226-1751 STUDY TITLE Extraction of Potassium Perfluorooctanesulfonate from Quail Serum and Quail Liver for Analysis Using HPLC-Electrospray/Mass Spectrometry DATA REQUIREMENTS Analytical Method Requirements STUDY DIRECTOR Sean Gallagher STUDY COMPLETED ON September 06, 2001 PERFORMING LABORATORY / TESTING FACILITY Centre Analytical Laboratories, Inc.

AR226-1527 SRPT r ' t3,fc Study No.

Study TMe FC-143: Two Year Oral Toxkct-Oncogemcity Study in Rats PEERREVeWOFOVAME8 APEPOexutptehBeroroCirm*s.4Me7na4tanlnP,aDth.Vol.Mog.yLaboratories, lac.