REPORT AMENDMENT NO. 1 TWO YEAR ORAL (DIET) TOXICITYICARCINOGENICITY STUDY OF FLUOROCHEMICAL FM-3924 IN RATS Experiment No.0281CROO12 The attachedpages include revisions in the first paragraph on page 3 of the Summary and in the third paragraph of page 22 of the Discussion.

ACTIVATED SLUDGE RESPIRATION INHIBITION TEST SUBSTANCE Identity:Perfluorooctanesulfonylamido(ethyl)acemtaaytea;lso be referredtoas PFOSAA, FC-128 oras themajor component of FC-1 27, FC-129, FC-1 09,or FC-109-X.

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CorporatOeccupationMaeldicine 3M CenterB,uildin2g20-3W-05 St.PaulM,N 55144-1000 65''1,34'2130Telephone 6517339066Fax 5.

CorporatOeccupationMaeldicine 3M CenterB,uildin2g20-3W-05 St-PaulM,N 55144-1000 651 7374230-,elephone 651 7339066Fax 8.

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MICROBICS MICROTOX@) TOXICITY TEST TEST SUBSTANCE Identity:Perfluorooctanoiaccid,ammonium salt;may also be referredto as PFOA ammonium salt,Ammonium pernuorooctanoate,PFO, FC-1 16, FC-1 26, FC-1 69, FC-1 43, or as a major component of FX-1003.

EFFECT OF DEGRADATION TEST SUBSTANCE ON FOAMING Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may alsobe referredtoas PFOS, FC-95, or as a component of FC-206 or L3243. (1-Octanesulfoniacid)(CAS # 2795-39-3).

LaboratoryReport AnalyticalReport ofData for PFOSA PharmacokineticStudy inRats (Seraand Liver) Laboratory Report No.

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coe. f nSLEadrrNyViiRdceaZlmabceol,nrMD MPH 3M Medica Deparment EHR- 1105_ 0037 4 am Certified pai oRaECrEIcViEc) 05HOV23 Mil:05 November 16, 2005 BEEEH@R-& goo-n 1Y G530MPTCaohmeSSr18NB1uSiOldieSng 2 S wa 817333152 fm Hi# 27055497 ARRA_6 3564 No CBI Re: TSCA Section 8() Supplemental Submissions: Docket Nos. 8EHQ-1180-373 and 8EHQ-1180-374 Dear Sir/Madam: CanTans NO ogy 3M has previously submitted analytical results for serum measurements ofvarious fluorochemicals. described below.

Andrea V.

3 70 p. 1 3~1 Compan y eP t-0027 Page I of 20 Final Report Epidemiology, 220-6W-0 8 - - Medical Department 3M Compan y St .

TSCA Section 8(e) ~226 . 3 7~" 7 Office October 23, p .1 200 6 Page 6 Attachment 2 DuPont First Chemical Blood Monitoring EIB Provided to Mississippi DEQ (2 pages) p. 2 DuPont First Chemical Blood Monitoring EIB As part of an ongoing industrial hygiene program, DuPont First Chemical has been monitoring PFOA levels in blood samples taken from employee volunteers .

28) OECD 105-OPPTS 830.7840, water solubility in nanopure water, 454C-118 SANITIZED PERFLUOROBUTANE SULFONATE, POTASSIUM SALT (PFBS) , BY THE SHAKE FLASK METHOD WILDLIFE INTERNATIONAL, LTD.