ARX& - 03U BIODEGRADATION TEST SUBSTANCE Identity: Perfluorodecanesulfonate, ammonium salt; may also be referred to as PFDS, FC-120, or 3M Sample J2905-1. (1-Decanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10heneicosafluoro-, ammonium salt, CAS # 67906-42-7) Remarks: Test sample is a mixture of the test substance in water and butyl cellosolve (approximately 25% test substance, 37.5% butyl cellosolve and 37.5% water).

3M Specialty Materials June 15, 2000 3M Center St.

Ar s.us _0608.

ftp*JUlS - 63J .Dainippon Ink & Chemicals, Inc * Facsimile Transmission D A T E ............................. 21 th.

226-1968 0 AJP003169 fio UI f.

a \ - ` UiAKr 36 22:ot ' ID:UfiNlKRFfiK3800 Ff: PAGE Z AR226-2021 WASHINGTON WORKS C-B INDUSTRIAL HYGIENE WORK ROLES, PROTECTIVE CLOTHING, RESPIRATORY PROTECTION, ETC, LIQUID C-S AIR MONITORING BLOOD MONITORING RJZ007180 i E ID 1 3 6 9 5 7 \J1S\JS" 30 C.C,-Ol 1 L r-.U IIM iC W H A O 'O O O rH A* PHtat ' 3 WASHINGTON WORKS AIR SAMPLING RESULTS PERSONAL SAMPLES OX - <107.

^' <9-k3 u y ( pY )r .

AR226-2156 Catherine A Barton A 07/08/2001 04:23 PM To: Robert F Pinchot/DEV/AE/DuPont@DuPont cc: Debbie J Mulrooney/AE/DuPont@DuPont Subject: Rob, I hope you had a nice vacation last week.

AR226-2159 Robert F Pinchot 07/12/2001 12:33 PM To: David M Rurak/AE/DuPont@DuPont, H David Ramsey/SE/DuPont@DuPont, Stephen J Gfesy/AE/DuPont@DuPont, Robert L Ritchey/CL/DuPorrt@DuPont, John J Mentink/CL/DuPont@DuPont, Chris E Shoop/AE/DuPont@DuPont, Bernard J Reilly/AE/DuPont@DuPont, John R Bowman/AE/DuPont@DuPont, Andrea V Maiinowski/AE/DuPont@DuPont, Oscar T Garza/AE/DuPont@DuPont cc: Maurice Astorga/AE/DuPont@DuPont, Debbie J Mulrooney/AE/DuPont@DuPont, Catherine A Barton/AE/DuPont@DuPont Subject: Air dispersion modeling strategy I have talked with a number of people yesterday and today concerning modeling of APFO emissions from Washington Works.

AR226-2163 Chris E S hoop 07/16/2001_ 01:38 PM To: Robert F Pinchot/DEV/AE/DuPont@DuPont, Debbie J Mulrooney/AE/DuPont@DuPont cc: David M RuraWAE/DuPorrt@DuPont, H David Ramsey/SE/DuPont@DuPont, Stephen J Gissy/AE/DuPont@DuPont, Robert L Ritchey/CUDuPont@DuPont, John J Mentink/CUDuPont@DuPont, Bernard J Reilly/AE/DuPont@DuPont, John R Bowman/AE/DuPont@DuPont, Andrea V Malinowski/AE/DuPont@DuPont, O scar T Garza/AE/DuPont@DuPont, Maurice Astorga/AE/DuPont@DuPont, Catherine A Barton/AEVDuPont@DuPont Subject: Air Dispersion Modeling Data Rob / Debbie, I have updated the table I sent Friday to include the vents from the not yet submitted Research Semiworks application.

AR226-2289 Robbin B anerjee 09/04/02 02:34 PM To: Oscar T Garza/AE/DuPont@ DuPont, Ta-W ei Fu/SE/DuPont@ DuPont cc: Stephen J Gissy/AE/DuPont@ DuPont, Kart G Kronberg/AE/DuPont@ DuPont, Fred M Lentz/SE/DuPont@ DuPont, Chris E Shoop/AE/DuPont@ DuPont Subject: CB report N O T Q U ITE SURE W H A T T H IS NUM BER M EANS Y E T ....F E N C E L IN E O R PO PULATIO N R EC EPTO R .....JU S T FO R IN FO ..... ----------------------------- Forwarded by Robbin Banerjee/AE/DuPont on 09/04/2002 05:33 PM -- ---------------------------------- From: Dawn D Jackson on 09/04/2002 04:48 PM To: Martha L Rees/AE/DuPont@ DuPont, John R Bowm an/AE/DuPont@ DuPont, David M Rurak/AE/DuPont@ DuPont, Diane R Shomper/AE/DuPont@ DuPont, Paul J Bosseri/AE/DuPont@ DuPont, H David Ram sey/SE/DuPont@ DuPont, George A Ainsley/SE/DuPont@ DuPont, Dawn D Jackson/CUDuPont@ DuPont, George H Senkler Jr/AE/DuPont@ DuPont, Robbin BanerJee/AE/DuPont@ DuPont, Kelli H Kukura/AE/DuPont@ DuPont, M.

AR226-2402 INTEROFFICE MEMORANDUM Dates From?

AR226-2413 ,,,,28/91 07:13 O M !

AR226-2434 t.fc BRANDERA AT A1 AT EU0IS2 02/18/94 02:27 PM To- RIETBRG AT A1 AT EU0IS2 , HUISMAW AT A1 AT EU0IS2 , QUARLES AT A1 AT WWPS , NISHIKAY AT A1 AT WWPS , AREA AT A1 AT YOVXOO , SAWATAI AT A1 AT YOVX00 , PRIMUSCJ AT A1 AT WWPS , 2IPFEL AT A1 AT WWPS cc: YOKOYAK AT A 1 AT YOVXOO Subject: First draft C-8 sampling + analysis procedure Tor see distribution list FromsR.A.

AR226-2455 Ohio River monthly average flows at Cincinnati, OH River flow data from <ftp://www.lrd-wc.usace.army.mil/Monthly_htm/> Assume: 1 ft3/sec= 0.0283m3/sec; 1 m3 = 1*10A6 cm3; 1 cm3 - 1 mL Estimated Estimated Estimated Mo-Yr Measured Long-term normal flow, of normal, flow, ft3/sec % ft3/sec normal flow. m3/sec normal Estimated flow, normal m3/mo flow, L/mo Jun-98 131,400 175 75086 2.12E+03 S.51E+09 5.51E+12 Jul-98 94,452 211 44764 1.27E+03 3.39E+09 3.39E+12 Aug-98 28,387 80 35484 1.00E+Q3 2.69E+09 2.69E+12 Sep-98 21,200 74 28649 8.11E+02 2.10E+09 2.10E+12 Oct*98 21,065 77 27357 7.74E+02 2.07E+09 2.07E+12 Nov-98 21,400 40 53500 1.51 +03 3.92E+09 3.92E+12 Dec-98 34,548 35 98709 2.79E+03 7.48E+09 7.48E+12 Jan-99 178,190 131 136023 3.85E+03 1.03E+10 1.03E+13 Feb-99 134,860 81 166494 4.71E+03 1.14E+10 1.14E+13 Mar-99 180,260 85 212071 6.00E+03 1.61E+10 1.61E+13 Apr-90 118000 66 178788 5.06E+03 1.31E+10 1.31E+13 May-99 60226 49 122910 3.481+03 9.32E+09 9.32E+12 Total 1.02E+06 1.18E+06 3.34E+04 8.74E+10 8.74E+13 C8 discharge to Ohio River in 1996, ibs 40600 RJZ0154QO EID137010 t C "t Estimated C8 C8 discharge concentration to Ohio River in Ohio River, in 1996, kg kg/L Estim ated C8 concentration in Ohio River, mg/L Estimated C8 concentration in Ohio River, ug/L 18416 2.11E-10 2.11E-Q4 0,211 RI2015401 BXD137011