16^ BESTG t* ^ p-6 -i$ RECEIVED f u : M AR 1 9 1930 Enhanced Elimination of\FC-95- - 3M TOXICOLOGY and 14 FC-143- C in Rats with Cholestyramine Treatment March 5, 1980 Conducted at : During: Conducted by: Report b y : Riker Laboratories, Inc.

Internal Correspondence cc: James Boyd - Chemolite 116-1 Eileen Fasbender - 116-1 F.

( \ m r O M lj BIODEGRADATION (BOD) TEST SUBSTANCE Identity: Perfluorooctanoic acid; may also be referred to as PFOA, FC- 26, or FX-1001.

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CAS Number 24448-09-7 3M Company -fir& & Voluntary Use and Exposure Information Profile N-methyl perfluorooctanesulfonamido ethanol I.

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PERSONAL AND CONFIDENTIAL AR226-1981 O.

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AR226-2071 4 S' 258508 ,,, Processed!

AR226-2102 Test Results Sample Date Range Concentration Range Action Level Industrial H ygiene 1/1/93 12/31/93 100% Sample Dt Sample# Duration Type Employee Name BTO : 08 TEFLON LOC: 045 BLDG. 162 ROOF-GENERAL 11/4/93 2310 450 A Pers Chemical C-8/FC-143 Cone Unit Percent <,Q8 MPB 5.4% BTO: 08 TEFLON LOC: 113 PIS - SHIFT MECHANIC (58MD) 11/16/93 19224 360 P 58MD C-8/FC-143 <.03 MPB 5.4% BTO: 03 LOC: 701 TEFLON FINE POWDER DRYER-EAST SIDE #2 1/21/93 8818 445 A 8/14/93 8823 360 A 6/29/93 8825 440 A 9/8/93 8832 360 A C-8/FC-143 C-8/FC-143 C-8/FC-143 C45/FC-143 2,04 MPB 031 MPB 0.23 MPB 0.39 MPB 525.0% ** 55.4% 41.1% 69.6% BTO: 08 LOC: 702 TEFLON FINE POWDER DRYER CONTROL ROOM (ALSO SEETTF031 1/21/93 1801 445 A C-8/FC-143 6/17/93 2135 450 A C-8/FC-143 6/29/93 2140 440 A C-8/FC-143 0.07 MPB 0 MPB 0.1 MPB 125% 0.0% 17.9% BTO: 08 LOC: 703 TEFLON FINE POWDER PACKOUT ROOM 0/26/93 2172 375 A 8/31/99 2173 360 A 9/13/93 2216 375 A 10/20/93 2271 375 A 11/8/93 2306 360 A C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 <03 MPB <.03 MPB <.03 MPB <.03 MPB <.03 MPB 5.4% 5.4% 5.4% 5.4% 5.4% BTO: 08 TEFLON@ LOC: 706 FINE POWDER DRYER #3 1/21/93 1800 440 A 6/14/93 2138 360 A 6/29/93 2139 440 A ..

AR226-2284 kJUKs PofEhiTUf A q s ffLL " o s & T S '- V Pofc.fi'hJ ft$4tuaus_ dnfitfgO.)

AR226-2527 REMOVING THE 1.4X FACTOR FROM EXPERIMENTAL STATION C-3 IN WATER RESULTS, HERE IS A COMPARISON OF THE MOST RECENT SAMPLES: C-8 SAMPLE EXP ST (PPB) CH2MHILL fPPB) CH2M C9(%) CH2M Cll(%) LAB BLANK --- < 0.1 82 74 TW-27 DUPLICATE 4.7 4.3 2.5 3.2 63 45 75 46 TW-M4 DUPLICATE 1.3 1.7 0.7 0.6 87 72 74 45 TW-331 DUPLICATE 1.0 1.4 0.6 76 49 0.6 85 61 TW-33 DUPLICATE 94 100 75 46 78 34 73 37 NOTE: C9 AND Cll ARE CH2MHILL SURROGATES WITH % RECOVERY SHOW4.

AR226-2579 ['Aridfew SrTptten .. ... ~~...... ......... 02/27/2002 10:39 A M ]| To: M.

AR226-2639 28 Forwarded by Andrea V Malinowski/AE/DuPont on 11/15/2004 11:33 AM Jim E Pesek/AE/DuPont 11/15/2004 11:17 AM To Michael D Aucoin/AE/DuPont@DuPont, Andrew S Hartten/AE/DuPont@DuPont, Andrea V Malinowski/AE/DuPont@DuPont cc Jeff E Todd/HO/DuPont@DuPont, Bradley S Martin/AE/DuPont@DuPont Subject Re : data in Envista for PAS (Document link: Andrea Malinowski) Andrew and Andrea-- I now have the explanations for the data set below.

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