AR226-2277 Robert I Wevodau 05/21/2002 09:36 AM To: George L Clowes_Jr/CL/DuPont@DuPont, Ravinder Singh/CL/DuPont@DuPont, Michael T Evans/AE,'DuPont@DuPont, Michael G McClusky/AE/DuPont@DuPont, Cynthia E Read/AE/DuPont@DuPont, Ta-Wei Fu/SE/DuPont@DuPont cc: Stephen J Gissy/AE/DuPont@DuPont, Chris E Shoop/AE/DuPont@DuPont, Karl G Kronberg/AE/DuPont@DuPont Subject: C8 Modeling W e are anticipating th at TERA will soon release an annual exposure level for C8.

Modelinq - CAB - 5/7/03 Source ID 1 2 Description Pre-scrubber exit for fne powder scrubber (called "AC Scrubber11on map) Post-scrubber exit for fins powder scrubber (celled "AC Scrubber" on map) Location D Plant O Plant 3 DBC Scrubber 4 MP-2 scrubber E Plant; copolymer plant for PFA and FEP MP-2 building: copolymer type micro- powder Height, m 8 15 18.2 16.1 Diameter, m Flowrate m3/hr Flowrate. m3/min Temp 0.68l" 2400 40 100 c 0.6 9600 160 40-50 C 0.6 1820 27 40 C 0.6 assumed 7500 125 40 C assumed Compound C8 C8 cs C0 Emission Emission Rate, kg/br Rate, g/s 0.24 0.0667 0.24 0.0667 0.07 0.0194 0.125 0.0347 --------- . ... ........ {1) Given in email of 4/17/03 from Hldetaka Hiromatsu: 600 sq mm square dame er.

Stephen W C onstable 09/08/2000 11:02 AM To: W illiam G 0 'Brien/AE/DuPont@DuPont cc: Ta-Wei Fu/CL/DuPont@DuPont Subject: analytical for C8 I met willi Ta-Wei (his morning and he mentioned dial you were searching for a method to analyze CK.

AR226-2486 David M Rurak 09/06/2002 01:11 PM To: Robert F Pinchot/DEV/AE/DuPont@DuPont cc: Subject: Environmental coordination -- Forw arded by David M R urak/AE/DuPont on 0 9/0 6/20 0 2 01:10 PM - f Uma Chowdhry ' 0 8 /28 /2 0 0 2 11:16 AM To: David M Rurak/AE/DuPont@DuPont cc: Subject: Environmental coordination I hear you are the env coordinator for the C8 issue.,!

AR226-2747 WL Copies to: E.

AR226-2759 gnn nu POUT USE ONLY K I du Pont de Nemours and Company HHaasekke.llll ^U kiki mtono SJoad> TNeowkarlck>o lWDelaware 19711 " Study Inltiated/Completed 1/1/B - 11/3/ Material Submitted by c oiymer" rroduc.ts Dept.

AR226-2776 fINHALATION : EMBRRYO-FET-]AL TOXICITY AND TERATOGENICITY STUDY IN THE RAT HASKELL LABORATORY REPORT NO. 881-81 Company Sanitized.

AR226-2858 PERSONAL AND CONFIDENTIAL Copies to : u . .. , WE * 1' du Pon+ de Nsmours and Company H askell Laboratory fo r T oxicology and In d u s tria l M edicine HASKELL LABORATORY REPORT NO. 448-77 MR NO M a te ria ls Tested* Haste11 No. 1) 11,225 2) 11,226 Samp I es Ready For Testing 5- 6-77 L Materials Submitted bv __T e x t!

AR226-2881 Copies S- I. du Pont de Nemours and Company Haskell Laboratory for Toxicology and Industrial Medicine Elkton Road, Newark, Delaware 19711 ORAL LD50 TEST IN RATS lO^oun^adult'ch'R-CD^ale 2 S E * * * * " * intubation in single doses to 5 level for the U>50 study*.

AR226-2884 E.

AR226-2924 CENTRAL RESEARCH AND DEVELOPMENT DEPARTMENT HASKELL LABORATORY FOR TOXICOLOGY AND INDUSTRIAL MEDICINE THE EFFECT OF PARTICLE OF A 1ATION TOXICITY INTRODUCTION . in this study nad been shown to be extremely tjoxic by inhalation when tested as a highly respirable aerosol (ALC of 4Z mg/m ).

FOR DU PONT USE ONLY y./ .... . ;_ T .. _.. . ..

AR226-3390 Comparison of Dose and Toxicity after Administration of a Fluoroalkylethyl Phosphate Surfactant by Dermal and Inhalation Routes in Rats C.

P-1 AR226-3586 January 30, 2006 70Q ~O lo-l^5l DuPont Corporate Remediation Group Barley Mill Plaza - Bldg. 19 4417 Lancaster Pike Wilmington, DE 19805 GS FE3 - ' ;.

Katherine E.