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NORTHERN KENTUCKY OFFICE SUITE 340 1717 DIXIE HIGHWAY COVINGTON, KENTUCKY 41011-4704 SOS-331-2S3S 513-3S1-2S3S FAX: 513-381-6613 DAYTON, OHIO OFFICE SUITE 900 110 NORTH MAIN STREET DAYTON, OHIO 45402-1786 937-22B-2S3S FAX: 937-228-2616 Robert A, Bilott (513) 357-9638 bilott@taftlaw.com TAFT, STETTINIUS & HOLLISTER LLP 425 WALNUT STREET, SUITE 1800 CINCINNATI, OHIO 45202-3957 513-381 -2838 FAX: 513-381-0205 www. taftlaw. com CLEVELAND, OHIO OFFICE 3500 BP TOWER 200 PUBLIC SQUARE CLEVELAND, OHIO 44114-2302 216-241-2838 FAX: 216-241-3707 COLUMBUS, OHIO OFFICE 21 EAST STATE STREET COLUMBUS, OHIO 43215-4221 614-221-2638 FAX:614-221-2007 /9S May 12,2005 FEDERAL EXPRESS Dr.

AR226-1999 TABLE 1* Comparison of Tenax Tube (T.T.) and Aqueous-impinger (A.I_.)

AR226-2064 WASHINGTON WORKS INDUSTRIAL HYGIENE REPORT FROM 1-Jan-1988 TO 31-Oct-199l 31-Oct-1991 Page 1 AREA; FLUOROCARBONS - COPOLYMERS CHEMICAL SAMPLE LOCATION * 5CONTROL C-S/FC-143 216 PERSONAL SAMPLE-WET FINISHING * DATE; 1i-Apl-- 19BB NOTEBOOK; 3 1 2 4 1 ,P1ES EMPLOYEE #04512 DURATION; 0390 CONCs 0.116 MPB PERS CODE; SAMPLE TYPE; P PERCENTAGE; 21% C-B/FC-143 216 PERSONAL SAMPLE-WET FINISHING *8 DATE; IB-Apt-- 1988 NOTEBOOK; 31241,P128 EMPLOYEE #04304 DURATION; 0660 CONG; 0.096 MPB PERS CODE; SAMPLE TYPE;P PERCENTAGE; 17% C-B/FC-143 216 PERSONAL SAMPLE-WET FINISHING *i DATE; 3-May-1988 NOTEBOOK; 31241,PI32 EMPLOYEE #04538 DURATION; 0660 CONC; <0.03 MPB PERS CODE; SAMPLE TYPE;P PERCENTAGE; 5% C-8/FC-143 216 PERSONAL SAMPLE-WET FINISHING *: DATE; 22-Jun-- 1908 NOTEBOOK; 31241,P139 EMPLOYEE #04445 DURATION; 0660 CONC; <0.03MPB ' PERS CODE; SAMPLE TYPE;P PERCENTAGE; 5% C-B/FC-143 216 PERSONAL SAMPLE-WET FINISHING DATE; e-Aug-1938 NOTEBOOK; 31241,P149 EMPLOYEE #04512 DURATION: 0660 CONC; 0.12 MPB PERS CODE; SAMPLE TYPE;P PERCENTAGE; 21% C-8/FC-143 216 PERSONAL SAMPLE-WET FINISHING *; DATE: 17-Apr-- 1991 NOTEBOOK: 53235,P056 EMPLOYEE #04304 DURATION: 480 CONC; 0.049 MPB PERS CODE; 1SPC SAMPLE TYPE: P PERCENTAGE; 9% 216 PERSONAL SAMPLE-WET FINISHING *: DATE; 25-Apt-- 1991 NOTEBOOK; 53235,P056 EMPLOYEE #04445 DURATION; 480 CONC; <0.03 MPB PERS CODE; 18PC SAMPLE TYPE; P PERCENTAGE; 5% C-8/FC-J.43 216 PERSONAL SAMPLE-WET FINISHING *s DATE: 6-Jun-- 1991 NOTEBOOK: 53235,P059 EMPLOYEE #04512 DURATION: 480 CONCs <.03 MPB PERS CODE; PC SAMPLE TYPE: P PERCENTAGE; 5% C-S/FC-143 216 PERSONAL SAMPLE-WET FINISHING DATE: 1i-Jun-1991 NOTEBOOK: 53235,P059 EMPLOYEE #04304 DURATION: 480 CONC: .235 MPB PERS CODE; P C SAMPLE TYPE; P PERCENTAGE: 42% C-S/FC-143 216 PERSONAL SAMPLE-WET FINISHING DATE; 13-Jun-1991 NOTEBOOK: 53235,P060 EMPLOYEE #04304 DURATIONS 480 CONCs .250 MPB PERS CODE; PC SAMPLE TYPE; P PERCENTAGE; 45% AJP002131 EXD079767 WASHINGTON WORKS INDUSTRIAL HYGIENE REPORT FROM 1-Jan-1988 TO 31~0et-1991 31--Oct-1991 Page 8 AREA!

* TestRsults ) , i AR226-2132 file:///C|AVINDOWS/TBMP/R]D C-8FC143 9-24-81 thru 7-19-01 6pages.htm 1 o f 12 Test Results Sam ple Data Range Concentration Range Action Level Industrial Hygiene 9/24/81 7/18/01 100% Sam ple Dt Sample # Duration Type Employee Name Pens BTO : 17 RESEARCH LOG : 019 WEIGH AND ADD C-8 TO POLYKETTLE 7/29/83 39740 411 Z 1/13/84 12116 409 P nono 8/17/84 12117 380 P none 4/30/85 12118 360 P none Chemical Cone Unit Percent C-8/FC-143 <0.03 MPB 5.4% C-8/FC-143 0.06 MPB 10.7% C-8/FC-143 0.34 MPB 60.7% C-8/FC-143 0.13 MPB 23.2% BTO: LOC : 17 RESEARCH 057 AROUND FLUOROCARBON EXTRUDERS 11/9/81 49895 2 C-8/FC-143 0.08 MPB 14.3% BTO: 17 RESEARCH LOC : 065 PPD SEMIWORKS 7/29/83 39741 410 Z C-B/FC-143 <0.03 MPB 5.4% AJP006929 BTO : LOC : 17 RESEARCH 066 FLUOROCARBON PANEL BOARD 10/14/83 39883 330 z 1/13/84 12224 414 P 6/21/84 12225 300 p 8/13/85 12362 380 p 8/13/85 12363 360 p norie none none none C-8/FC-143 0.03 MPB 5.4% C-8/FC-143 0.06 MPB 10.7% C-8/FC-143 <0.03 MPB 5.4% C-8/FC-143 0.055 MPB 9.8% C-B/FC-143 0.13 MPB 8/28/2001 5:09 PM EID 140171 TestResults 1/3/86 12370 1/3/86 12371 7/1/86 12383 7/1/86 12384 8/14/86 13212 8/14/86 13213 10/13/86 13279 10/13/86 13280 11/19/86 13348 11/19/86 13349 310 P 315 P 373 P 375 P 360 P 365 P 405 P 404 P 380 P 380 P file:///C|AVINDO'WS/TEMP/RD C-8 FC143 9-24-81 thru 7-19-01 OpagesAlm none none none none none none none none none none 23.2% 08/FC-143 <0.03 MPB 5.4% C-8/FC-143 0.07 MPB 12.5% C-8/FC-143 0.208 MPB 37.1% C-8/F0143 0.139 MPB 24.8% 06/FC-143 0.121 MPB 21.6% C-8/FC-143 0.577 MPB 103.0% 08/FC-143 0.458 MPB 81.8% 08/FC-143 0.09 MPB 16.1% C-8/FC-143 0.026 MPB 4.6% C-8/FC-143 0.204 MPB 36.4% Tuesday, August 28,2001 3:16:19 PM P an el of6 2 of 12 Sample Di Sam ple # Duration Type Employee Name BTO: 17 LOC: 068 RESEARCH SP AREA REFRIGERATION UNIT 1/27/97 25054 380 P Pars Chemical 08PM C-8/FC-143 Cone Unit Percent 0.1 MPB 17.9% .

.

AR226-2176 EID384427 Current Permlt/Appllcation/PDF_#______________________ 1823A 815D 815D 1353A Pre-Existing 614A 614A 781 1953 2365A Note: For some vents the surfactant rate Is less than the total particulate reported in Air Emissions Inventory which can Include polymer dust.

AR226-2323 / Irene A Legiec 04/03/2003 10:40 AM To: Ann K Masse/HO/DuPont@DuPont cc: Mark D Richmond/AE/DuPont@DuPont, Catherine A Barton/AE/DuPont@DuPont, Richard S Viekery/AE/DuPont@DuPont, Maria S Angelo/AE/DuPont@DuPont, Paul J Gorzsas/ABDuPont@DuPont Subject Re: Dispersion modeling data Q Ann, W e have a ballpark number for influent data.

AR226-2326 { 'f John W M ilroy_III 04/04/2003 11:09 AM To: cc: S u b je ct Catherine A Barton/AE/DuPont@DuPont Stephen R Hastings/DDE/DuPont@DuPont, Ann K Masse/HO/DuPont@DuPont, Charles J Zarzecki/AE/DuPont@ DuPont Re: Data fo r a ir dispersion modeling Q Stack height is 25 feet.

AR226-2360 E L du Pont de Nemours and Company W ashington W orks Halb P.O.

AR226-2814 DuPont-14096 TRADE SECRET Study Title H-24750: Static, Acute, 48-Hour Toxicity Screening Test with Daphnia magna Authors: Barbra D.

FOR DU PONT USE ONLY AR226-2890 Copies to: E.

Study Sponsor: Issue Date: Document Reference No.: ATOCHEM 28-Jun-84 511 TAL AR226-2917 Eye Irritation Author(s): A.

P-1 ENVIRONMENT CANADA AND HEALTH CANADA CONSULTATIONS ON THE PROPOSED ACTION PLAN FOR PERFLUOROCARBOXYLIC ACIDS AND PRECURSORS REPORT OF CONSULTATION MEETING Ottawa, Ontario, Canada February 6 and 7,2006 P-2 Table of Contents INTRODUCTION............................................................................................................... 2 WELCOME/OBJECTIVES..............................................................................................3 PART 1 THE SCIENTIFIC CONTEXT................................................................... 4 PFCAs and Precursors: Simplified Terminology/Sources and Fate...............................4 Environmental Fate of Fluorotelomer Based Substances...............................................5 External Review and Science Update............................................................................. 8 PART 2 THE REGULATORY CONTEXT.............................................................. 8 Assessment and Management of Substances.................................................................. 9 PART 3 PROPOSALS ON PFCAs AND PRECURSORS...................................... 9 Overview o f Proposed Action Plan................................................................................. 9 Proposed Action Plan: New Substances....................................................................... 11 FEEDBACK ON PROPOSED ACTIONS FOR NEW SUBSTANCES.............12 Process for preparing a Regulatory Impact Analysis Statement.................................... 13 Proposed Action Plan: Existing Substances...................................................................14 FEEDBACK ON PROPOSED ACTIONS FOR EXISTING SUBSTANCES .. 14 Proposed Action Plan: Research and International Cooperation..................................16 CLOSING COMMENTS AND NEXT STEPS............................................................. 18 APPENDIX A: Consultation Agenda APPENDIX B: List of Participants Environment Canada Health Canada - PFCAs and Precursors: Action Plan Consultations - Report page 1 P-3 INTRODUCTION In 2004, the New Substances Program of Environment Canada and Health Canada assessed four new substances which are considered sources of perfluorinated carboxylic acids (PFCAs).