DuPont's letter on the CBI issue also is enclosed.

AMD IMOOSTRIAT, KBDZCINK DuPont HLR 821-95 STATIC, ACTTB 96-800R SCREENING TBST 0?

MEANBODY WEIOGFMH ALETRASTS cvs DuPont 11574 Page enero 88 LIST OF APPENDICES Page A.

AR226-3186 TRADE SECRET Study Title H-24616: Subchronic Toxicity 90-Day Gavage Study in Rats with One-Generation Reproduction Evaluations Volume 3 of 5 Laboratory Project ID: DuPont-4739 DuPont-4739 TEST GUIDELINES: U.S.

Box 50 Newark, Delaware 19714-0050 Laboratory Project ID: DuPont-11414 Company Sanitized.

Currently, Exygen performs all C-8 water sample analyses for DuPont.

A prior study conducted at DuPont HdiafsfkeerlelncLeabwoarsatloerasytfaotu4ndweseekx-sdoefpaegned,enatt tPiFmOeApeerliiomdijnuasttiopnriionr 4{-08swexeueakl omladturraattsi.o)n Tinhethseerxa.

Sponsor: DuPont Specialty Chemicals E.

Korzeniowski - DuPont M.

`The risk evaluation has been prepared consistent with the screening-level approaches outlined in the following documents: Q RCRA Facility Investigation Plan, DuPont Washington Works (DuPont, 1997).

P. 1 DuPont-18318 TRADE SECRE T Study Title Ammonium Perfluorooctanoate : 28-Day Immunotoxicity Study in Male Mice TEST GUIDELINES : U .S .

Study Completed on: September 15, 2006 Performing Laboratory: DuPont Epidemiology Program DuPont Haskell Laboratory for Health and Environmental Sciences 1090 Elkton Road, Newark, DE 19714 Laboratory Project ID: DuPont-14809 (Phase II) Work Request Number: 15259 Service Code Number: 1242 Sponsor: E.I. du Pont de Nemours and Company Wilmington, Delaware 19898 U.S.A. 1 of 73 FINAL Good Epidemiology Practice Compliance Statement............................................................... 5 D uPont A p p ro v al....................................................................................................................................6 Epidemiology Review B o a rd ................................................................................................................ 7 A bbreviations and S ym bols................................................................................................................. 8 Executive S u m m ary ............................................................................................................................... 9 In tro d u ctio n ..........................................................................................................................................11 M ethods................................................................................................................................................... 12 C ohort A scertainm ent................................................................................................................... 13 D uPont M ortality R egistry............................................................................................................13 Exposure C ategorization...............................................................................................................13 Establish Job Exposure Categories.............................................................................................. 14 Exhibit 1.

Does notcontTSaCAiCnBI 9204-7D6ay8G;aSvuabgcehrSonticiuTonxdRiacyistwyithOne-Generation Reproduction Evaluations DuPont:5990 B.

HUGHES ASSOCIATES, INC.

HRR26 _ 323) 403 ARR - 322] DuPont 5990 `TRADE SECRET Study Title with OneH-9-G02e-4n7De6ar8y:aGiaoSvnuabRgceehprrSootnduiudccytTiionoxniRcaEitvtsayluations Volume 3 of 5 Laboratory Project ID: DuPont-5990 TEST GUIDELINES: U.S.