AR226-2511 Akito Abe 04/01/2002 09:46 PM To: Stephen R Peck/SE/DuPont@DuPont cc: Yoshihiro Hayatsu/PO/DuPont@DuPont, Hidetaka Hiromatsu/PO/DuPont@DuPont, Paul K Mathur/CL/DuPont@DuPont, Ta-Wet Fu/SE/DuPont@DuPont Subject: C-8 analysis at W W lab Steve, l imagine you had enjoyed in your Easter holidays.

AR226-2551 EID121902 RCRA Facility Investigatioii Results Review March 14,2001 6 L U I0HSV i Introductions Site Background Site Hydrogeology RFI Scope of Work RFI Results Conclusions and Recommendations Wrap-Up 0 8 2 1 1OHSV EID121903 r WToasfahminiglitaornizWe tohrekEs sPiAte/pWhyVsiDcaElPsepttrionjgect team with the cToomsphlaerteedthReCreRsuAltFsaocbiltiatyinIendvefrsotimgatthioenrecently To provide perspective on the RFI results pTrootpercotpioonseoaf hpuamthafnorhweaalrtdhtahnadt wthiell eennvsuirroencmoenntitnued ISntOHSV EID121904 coThvhaeerraD1c0tuePyrieozanerdtsWoanfadisnhwvineesgllttiuognnadtWieornostraoknosdds,mitaeosinsaitwroeersilunl lgt.of caTnohdnettrchooelmpebrnoivngiarroatimnomneeonnfstuIRfrreMopmsroastnietdectStihoWenMaocfUtihvsu.emsiaten hhyedarltahulic DseiftfueePchotyivndetrnainuetsleiscngdcoosinntotgrocfoloprnwrtoiangrudrea.mtoaancdtivmeloynoitpoerriatste the Z8ZII0HSV EID121905 # # M1,2a0n0ufaaccrteusrionngObehgioanRiinve1r9i4n8'western WV Engineering Polymers, Fluoroproducts, and P6dP Engineering plastics (Delrin) - Nylon pellets and filaments (Zytel) - Acrylic resins and molding compounds - Polyvinyl butyral (Butacite) - Teflon & Tefzel Approx. 2,400 employees (DuPont's 2nd largest) C821I0HSV EID121906 WEI IOHSV EID121907 ASI lOU 285 IIM 21908 -1 bI1n9yv8Ee9sP-tiAgCaRotireorgenico(tinVvIIe)IAIorfcet6qiouSniWroinMrg"UVHseSrWifiAca"tipoenrmit issued 1991 and 1992 - Conducted VI MIRnFjaeIrccwthioo1nr9kW9p7lea-lnlEs fProeArmfcooovumerdSmWferonMmteUdcsoo(nnLsViodcIearlaanLtidFonr&e)quired 1998 and 1999 - Conducted RFI 98UI0HSV EID121909 Riverbank Landfill Anaerobic Digestion Ponds Polyacetal Waste Incinerator sntO H S V EID12I910 SWMU LOCATIONS h EID121911 SSCI I0HSV SWMU LOCATIONS Operated from 1948 to mid-1960s Measured 4,500 feet long by 150 feet wide Friivlleerdflsoteoedpplsalionpe separating main plant terrace from Filled with general plant solid waste Closed by covering with soil, vegetation, and rip-rap Today the RBL is densely vegetated Mtcroeenatcthmeyrlenenn-tenscyohswltoemrcidoentsreoellpedwabsytchoellmecatiinonaraenadof 68Z110HSV IID1219X2 ?

AR226-2809 DuPont-12988 TRADE SECRET Study Title H-24750: Static, Acute, 96-Hour Screening Test to Oncorhynchus mykiss Laboratoiy Project ID: DuPont-12988 A u t h o r s : Laurie D.

3M Company EPI-0027 Page 1 of 20 Final Report Epidemiology, 220-6W-08 Medical Department 3M Company St.

\6YY p.1 m i 2 6 - 3733 July 28, 2006 u c ; QO 05 HUG - 1 " " D ' DuPont Haskell Laboratory for Health and Environmental Sciences Elkton Road, P.O.

P-1 fflU T O May 24, 2007 fl -2 Z & 3 7 & / ' 07_ li7 7 7 " '" 77 0: 03 DuPont Haskell Laboratory for Health and Environmental Sciences Elkton Road, P.O.

3M 3M ENVIRONMENTAL LABORATORY PROJECT E05-0210; INTERIM REPORT #20 Interim Report #20: Analysis of Water Samples from Northern Alabama Potable Water Systems, February 2006 Study Title A n a lysis o f Per flu o r o b u ta n e s u lfo n a te (PFBS), Pe r flu o r o h e x a n e s u lfo n a te (PFHS), AND PERFLUOROOCTANESULFONATE (PFOS) IN WATER, SOIL, SEDIMENT, FISH, C la m s , V e g e t a t io n , S m all Ma m m a l Liver a n d S m all Ma m m a l S erum Usin g LC/MS/MS for the 3M Decatur Monitoring Program Data Requirement EPA TSCA Good Laboratory Practice Standards 40 CFR 792 Author Susan T.

ACUTE TOXICITY TO CHIRONOMUS TENTANS USING SPIKED SEDIMENT TEST SUBSTANCE_______________________________________________ Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks: The test substance is a white powder.

3M General Offices 3M Center St.

Jean B.

P-1 Taft/ T a ft S te ttin iu s & H o lliste r LLP 4 2 5 W a ln u t S tree t, S uite 1 8 0 0 '' C in c in n a ti, OH 4 5 2 0 2 -3 9 5 7 / Tel. 5 1 3 .3 8 1 .2 8 3 8 / Fax; 5 1 3 .3 8 1 .0 2 0 5 / w w w .ta ftla w .c o m C incinnati / Cleveland / C olum bus / D ayton / Indianapolis / N orthern Kentucky / Phoenix / Beijing Ro be r t A.

INTERIM REPORT # 4 - Analysis of Surface Soil Samples STUDY TITLE Analysis o f 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 # 7-Analvsis of Soil Boring 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 October 27,2006 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.

1 July 30, 2012 Probable Lin k Evaluation o f Thyroid disea se Conclusion: On the basis of epidemiological and other data available to the C8 Science Panel, we conclude that there is a probable link between exposure to C8 (also known as PFOA) and thyroid disease.

A, Minnesota Pollution Control Agency Minnesota Pollution Control Agency. tet | NSA | 51156690 | dS | ELS TI | empires 520LafayelleRoadNo~h I St.