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BACK TO MAIN Study Title Microbial Metabolism (Biodegradation) Studies of Perfluorooctane Sulfonate (PFOS) I I .

iPhone: (814)231-8032 BACK TO MAIN Fax:(814)231-1253 or (814)231-1 580 Analytical Report Fluorochemical Characterization of Slurface Water Samples Pensacola, FI (W2176) Centre Analytical Laboratory Report No. 023-014C (Revision 1) Revision Data 3/21/01 Testing Laboratory Centre Analytical Laboratory, Inc. 3048 Research Drive State College, PA 16801 3M Environmental Laborafiery Contact Kent R.

Northwest Bioanalytical Study No.

ou Ae226- 191 D 3M MEDICAL DEPARTMENT, CORPORATE TOXICOLOGY Title: Comparative Molecular Biology of Perfluorooctanesulfonate (PFOS, T6295), N-ethyl perfluorooctanesulfonamido ethanol (N-EtFOSE, T-6316), N-Ethyl perfluorooctanesulfonamide (N-EtFOSA, T-6868),Perfluorooctanesulfonamido acetate (FOSAA, T-7071), and/or Perfluorooctanesulfonamide (FOSA, Rats and Guinea Pigs following Oral dosing.

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AR226-2032 SZAKATBK 11/17/97 02:47 PM To: cc: Subject: ESTILUO, 21PFEL PLAYTIS C-8 Roof Samples Per Joe's request, the following samples were taken 10/29 & 30 on the C-8 Recovery Building root top; Location #1 = Location #2 = Location #3 = West side of Roof Mid Roof East Side of Roof DATE LOCATION WXtTO DIR C-8/MBP 10/29 11 AM to 2 3;30 PM 1 " 3 W to E " " " 0.42 0.22 0.98 10/30 1 M/E to S/W 2.75 9i10 AM to 2 " " 0.33 3i00 PM 3 " " 0.09 The blank sample submitted for analysts with the six roof area samples measured -0.0001 iapb.

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AR226-2133 Test Results Sample Date Range Concenlration Range Action Level Industrial Hygiene 1/1/2002 na2/2oo2 100% Sample Dt sample* Duration Type Employee Name BTO: 08 LOC; 045 TEFLON B-162 ROOF 2nd Level-GeneralS Hart/Units 3/5/2002 10445 360 A S/11/2002 10514 360 A 9/11/2002 10631 360 A Pera Chemical C-8/FG-143 C-8/FC-143 C-WC-143 BTO; 08 LOC: 048 TBFLON@ B-l% OUTSIDE SMOKING AREA -2ND LEVEL 3/6/2002 10448 380 A 6/11/2002 10815 360 A fl/13/2002 10637 380 A CWC-143 C-6/FC-143 C-8/FC-143 BTO: W TEFLON I.OC; 101 P/S-TFE FIELD OPERATOR (QSPA) 1/22(2002 36782 360 P ?

AR226-2160 Chris E Shoop_ 07/12/2001 01:17 PM To: cc: Subject: Robert F Pinchot/DEV/AE/DuPont@DuPont, Debbie J Mulrdoney/AE/DuPont@DuPont David M Rural</AE/DuPont@DuPont, H David Ramsey/SBDuPontQDuPont, Stephen J Gissy/AE/DuPont@DuPont, Robert L Ritchey/CL/DuPont@DuPont, John J Mentink/CL/DuPont@DuPont.

AR226-2317 ^ Charles J Zarzecki 03/26/2003 11:02 AM To: cc: Subject Ann K Masse/HO/DuPont@DuPont Catherine A Barton/AE/DuPont Washington Works C8 Modeling Report Ann, As we had promised, attached is the modeling report that Debbie Mulrooney wrote for the modeling she did for Washington Works.

AR226-2330 DISPERSION MODELING PROTOCOL Plant-wide C8 Emissions DuPont Chambers Works Facility Deepwater, New Jersey Prepared by: DuPont Engineering Technology (DuET) Environmental Section Wihmngton, DE 19898 April 9,2003 EID747779 DuPont Chambers Works Air Quality Modeling Protocol The following sections describe the dispersion modeling methodology to be employed in order to assess the locations of maximum ambient air concentrations resulting from C8 emissions at the DuPont Chambers Works facility located in Deepwater, New Jersey. 1.