3M Specially Materials 3M Center St.

AR226-2112 Sample Date Range Concentration Range Action Level Industrial H ygiene 1/1/84 12/31/84 100% Sample Dt Sample# Duration Type Employee Name BTO: 08 TEFLON LOC: 701 FINE POWDER DRYER-EAST SIDE#2 1/8/84 46247 390 Z 1/13/84 46248 380 Z 3/11/84 46249 360 z 4/10/84 46250 395 z 5/7/84 46251 380 z 6/3/84 46252 380 z 7/2/84 46253 360 z 7/30/04 46254 360 z 8/24/84 46255 330 z 9/23/84 46256 420 z 10/21/84 46257 360 z 12/17/84 46258 370 z Pers Chemical C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 Cone Unit Percent 82 MPB 146429%** 0.19 MPB 339% 0,31 MPB 55.4% OZI MPB 379% 0.47 MPB 839% 0.29 MPB 51.8% 0 .0 3 MPB 5.4% 0.26 MPB 509% QJ53 MPB 94.6% 0.62 MPB 110.7%** 056 MPB 64.3% 0.39 MPB 69.6% BTO: 08 TEFLON LOC : 702 FINE POWDER DRYER CONTROL ROOM (ALSO SEE TTF031 1/23/84 3656$ 345 z C-8/FC-143 1/27/84 36587 420 z C-8/FC-143 2/20/84 36568 360 z C-8/FC-143 3/17/84 36569 360 z C-8/FC-143 6/12/84 36570 385 z C-8/FC-143 7/8/84 36571 340 z C-8/PC-143 8/4/84 36572 420 z C-8/FC-143 10/2/84 36573 360 z ' C-8/FC-143 11/2484 36574 350 z C-8/FC-143 12/23/84 36575 340 z C-8/FC-143 0.62 MPB 0.51 MPB 038 MPB 0.37 MPB 0.S3 MPB 0.15 MPB 0.38 MPB 0.77 MPB 0.26 MPB 0.23 MPB <1 110.7%** 91.1% 679% 66.1% 94.6% 26.8% 67,9% 137.5%** 46.4% 41.1% BTO!

AR226-2181 C hris E S h o op 08/22/2001 12:42 PM ............ ...........................

AR226-2271 ' ' Debbie J Mutrooney " 04/04/2002 01:17 PM To: Robert F Pinchot/DEV/AE/DuPont@DuPont cc: Bernard J Reilly/AE/DuPont@DuPont Subject: Deposition Results and Modeling Report |i| Rob, Here are the deposition results for the 2003 em issions for Little Hocking and Lake Washington: W atershed D eposition R e su lts - 2003 Em issio Also, here is the final m odeling report: F in a l M odeling Report.di RP026414 E ID 5 8 2 6 0 7

AR226-2598 REVISED GROUNDWATER FLOW MODEL DUPONT WASHINGTON WORKS WASHINGTON, WV Date: January 2003 Project No.: 18983635 7423 CORPO RATE REM EDIATION G R O U P An Alliance between DuPont and UPS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 A SH 020280 E D 630708 Revised Groundwater Flow Modal Introduction TABLE OF CONTENTS 1.0 Introduction,-,*.... ........................*****................................ ................................... j 2.0 Site Setting, Geology, and Hydrogeology...................................................................4 2.1 Site Setting.................................................... ......................................... ...........* 2.3 Hydrogeology......................................................................................... 3.0 Primary Data Sources............ ....................................................................................2 5 4.1 ModelDomain and Discretization................................. 9 4.2 Boundary Conditions.... ................................................ ................................. 4.2.1 No Flow Boundaries 4.2.2 Ohio R iver....................... 1 4.2.3 Minor Surface Water Features............................................................ 12 4.2.4 Pumping Wells........ ............................................. 13 4.3 Main Input Values....,...... ............................... ...............*.............................^ 4.3.1 Hydraulic Conductivity......................................................................16 4.3.2 Recharge........ ........................ 1 5.0 Groundwater Model Calibration............ ......................... . - ...................... --......

AR226-2610 SAMPLING INVESTIGATION RESULTS LITTLE HOCKING WATER ASSOCIATION WELL FIELD WASHINGTON COUNTY, OHIO Date; April 2003 Project No,: 7482 18983762.00010 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 1980S ASH025862 EID779150 ED779150 Sampling Investigation Rsulte Table of Contente TABLE OF CONTENTS Executive Summary................................. 1.0 Introduction........................ . .......... iii ......,,...1 2.0 Environmental Setting.................... 2.1 Geology............................ ...... 2.2 Hydrogeology........................ . .....3 ............ 3 4 3.0 Sampling Approach............................. .................. . ....5 4.0 Groundwater Sample Results........................... ............................... 4.1 C-8 in Groundwater from Temporary Borings...................... 4.2 C-8 in Groundwater from Production and Test W ells........... 4.3 Groundwater Elevations in Production and Test Wells and Ohio River Stage., ....6 ....6 ....6 ......8 5.0 Soil Sample Results.................................................... ....9 6.0 Site Conceptual Model........... .............................................. 6.1 Geology...................................... ............................ 6.2 Hydrogeology................................. ................ ............. 6.3 C-8 Transport Mechanisms and Migration Pathways. ..10 ..10 ..10 ,,11 7.0 Conclusions and Recommendations ..................................... .................. 13 8.0 References.............................................................................. .................. 15 Table 1 /Table 2 Table 3 Table 4 TABLES C-8 in Groundwater from Temporary Borings ' C-8 in Production and Test Wells Groundwater Elevation Data for Production and Test Wells August 21, 2002 C-8 in Soil from Temporary Borings L.HSIreportl Apf. 17.03 Wilmington, DE f ASB025863 EID779151 EID779151 Sampling Investigation Results Table of Contents Figure t Figure 2 Figure 3 Figure 4 Figures Figure 6 Figure 7 Figure 8 Figure?

AR226-3160 DuPont-2921 TRADE SECRET Study Title H-23925: Biopersistence Screening 10-Dose Oral Gavage Study in Rats Laboratory Project ID: DuPont-2921 Author: Carol Finlay, B.A.

SEVERN TRENT LABORATORIES ANALYTICAL REPORT JOB NUMBER: 238585 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: 07/29/2005 Signature Name: Richard C.

l&> 3M General Offices 3M Center St.

Katherine E.

ftRl%-0 2 3 5 3M Environmental Laboratory Final Report- Analytical Study Single-Dose Intravenous Pharmacokinetic Study of T-6052 in Rabbits In-Vivo Study Reference Number: HWI#6329-134 Study Number: AMDT- 111 694.1 Test Substance: FC-120 (T-6052) Name and Address o f Sponsor: 3M SCD Division 367 Grove Street St.

02/28/2001 ENVIRONMENTAL LABORATORY ARCHIVED FINAL REPORT B A C K T O M AIN LAB REQUEST NO. 8442 REQUESTOR NAME: EAR DEPARTMENT: 0535 PROJECT NO: 9970012600 DATE RECEIVED: 09/07/1982 DESC: ENVIRONMENTAL SCREEN ON L-6778 CONTRACT LAB(S): EXP COMP DATE: 11/12/1982 DATE COMPLETED: 11/09/1982 PROJECT LEAD: PHONE NO: 3M FAX NO: 651-778-6176 EVAPORATE TO DRYNESS UNDER AIR OR N2.

BACK TO MAIN SELECTED FLUOROCHEMICALS IN THE DECATUR, ALABAMA AREA Preparedfor: 3M St.

BACK TO MAIN 3M Company EPI-0011 Page 1of 5 INTERIM REPORT Epidemiology M edical Department 3M Company St.

ACUTE TOXICITY TO FISH (Rainbow Trout) 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 test substance is a white powder.