Enclosure 3 Removal of PFOA with Granular Activated Carbon 3M Wastewater Treatment System Monitoring There are many factors that can influence the adsorption of a chemical constituent onto activated carbon.

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ENVIRONMENTAL PHYSICAL/CHEMICAL, FATE, EFFECTS AND MONITORING STUDIES BIODEGRADATION BACK TO COMPOUNDS STUDY TITLE COMPOUND LABORATORY REPORT NUMBER SUMMARIES Biodegradation Executive Summary The Aerobic Biodegradation of N-EtFOSE Alcohol by the Microbial Activity Present in Municipal Waste Water Treatment Sludge N-EtFOSE E00-2252 Robust Summary The 18-Day Aerobic Biodegradation Study of PerfluorooctanesulfonylBased Chemistries 18 Day PFOS 18 Day PFOA 18Day FOSA 18Day N-EtFOSAA 18 Day N-EtFOSA 18 Day N-EtFOSE The 35-Day Aerobic Biodegradation Study of PFOS PFOS E01-0415 E01-0444 Robust Summary Robust Summary

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.. . 3M Strategic Toxicology Laboratory Study Title: Acute Inhalation Limit Toxicity Study of Perfluoroctanesulfonyl Fluoride (POSF) T-7098.3 rest Number (sample): T-7098.3 (Perfluoroctanesulfonyl Fluoride (POSF) Laboratory Project Identification: ST64 [n-Life Initiation Date: 5/1/2001 [n-Life Completion Date: 5/14/2001 Research Client: 3M Specialty Materials Division 3M Center Building 236 Saint Paul, MN 55 133-3220 Testing Laboratory: 3M Strategic Toxicology Laboratory 3M Center Building 270-SB-181 Saint Paul, h8N 55133L3220 Study Director: Andrew M.

j NorthwestBioanalytical f RSetpuodryt NNoo..NNWWB'BRS0010--006951 Quantitative Determination of PFOS and Related Compounds Serum and Plasma by LC/MS/MS in Human Sample Analysis Report EPI-0012 for Protocol Northwest Bioanalytical (NWB) A Division of NWT Inc. 1121 East 3900 South Salt Lake City, UT 84124 PREPARED FOR: 3M Company Epidemiology, Medical Department 220-3W-05 St.

ACHARLESRIVER COMPANY PATHOLOGY PEER REVIEW REPORT 26-WEEK CAPSULE TOXICI(TAYPFSOT)UIDNYCWYINTOHMAOMLMGOUNSIUMMONPKEERYFSLUOROOCTANOATE `Covance Study Number 6329-231 OBJECTIVE oaAbnjmdeicctthrieovsetcwooopfiactnhipemeaerlresvritehevawitewhwaaodsfattnhoeucnaoslncfthiiesmdsuuaelsneddfrsfoaucmrrtiahlfleircheie(gl1hu0-c5idd7oa2st1ee aainnfidmpao1ls0ss5,i7bsl2ee4,l)ewctatheosd spcaeotrntferodorlmceadan.uismoaTlhsoe,f moriboufnandimialys 105721 and 10724.

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- ADIETARYLCS0STUDYWIrToHTsHENORTHERN BOBWHITE WILDLIFE INMTELRANABTRIEOQNUAELSLTTDN,o.PRO0J2E7C23T NO 454.103 S5r U0S.

Toxicological Summary PFOS Dietary Acute Mallard Study Test Substance: Perfluorooctancsulfonate (PFOS) Structure; p1o-tOacstsanieusmuslaflot,niCcASa#cid2,7951-,3192.23.33.44.5.5,6,67,7,88$-heptadecafluoro-, Remarks: sTthoeretdesutndseurbstaamnbcieenits caonwdhiittieonpsoawndderpu(ri3tMy wloats#2o1r7i)g.inalTlyhedestaemrpmlienewdatso tbeechn9i0q.ue4s9.% bIny aLCsu/bMsSe,que'nHt-aHnMaRly,sis"oFf-tNhMeRtesatndsubcslteamnecen,talpuraitnyalywsaess determined to be 86.9%.

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AR226-2232 Steven L Grise 12/12/2001 09:43:14 AM To: cc: Subject: Bernard J ReilIy/AE/DuPont@DuPont, Robert F Pinchot/DEV/AE/DiiPont@DuPont, Debbie J Mulrooney/AE/DuPont@DuPont Steven L Grise/AE/DuPont@DuPont C.O.

AR226-2430 Ht^'-f^ INTEROFFICE MEMORANDUM c^ TOt WALTER M.

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