AR226-2038 "Roger J.

AR226-2169 k, Robert L Ritchey r 07/27/2001 03:43 PM To: Chris E Shoop/AE/DuPont@DuPont, Karl G Kronberg/AE/DuPont@DuPont, Debbie J Wlulrooney/AE/DuPont@DuPont cc: Stephen J Gissy/AE/DuPont@DuPont, David F Altman/SE/DuPont@DuPont, Andrea V Mallnowski/AE/DuPont@DuPont, Robert F Pinchot/DEV/AE/DuPont@DuPont Subject: DuPont Washington Works Model Input Files Chris and Kart, I guarantee a check by Hanshaw against permit applications re: stack flows and velocities.

AR226-2191 EID 293578 Washington Works C8 Emissions - Actual with FPD at 12000 43485004348000- 4347500- 4347000- ?

AR226-2218 Chris E Shoop 11/29/2001 09:06 AM To: Debbie J Mulrooney/AE/DuPont@DuPont cc: Subject: Re: Revised Spreadsheet O Debbie, The semiworks facility has been operating since long before the permitting regulations were in place.

AR226-2243 ( j?

SITE SCREENING LEVEL ASSESSMENTS FOR PFOA AND THE RELEVANCE OF SOIL SAMPLING Date: O ctober20,2003 Project No.: 18983753.00034 CO RPO RATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 EXP001453 Site Screening Level Assessm ents for P FO A and the R elevance of Soil Sampling Table of Contents TABLE OF CONTENTS Executive Summary............................................................................................ 1.0 Introduction.................................................................................................................. 1 OO U* U ^ 2.0 Data Presentation..................... 2.1 Development o f a Generalized PFOA Screening Level Site Conceptual M odel........................................................................................................ 2.2 Laboratory Studies o f PFOA and Field Sample Verification................. 2.2.1 TTie Behavior o f PFOA in W ater.... ........................................... 2.2.2 Adsorption/Desorption o f Ammonium Perfluorooctanoate to Soil............................................................................................... 2.2.3 Little Hocking Water Association Investigation Results........... 2.2.4 Washington Works RFI Soil Sampling Results.......................... 3 3.0 Summary............................................................ ...................................................... io 4.0 References................................................................................................................. 11 Table 1 Table 2 Table 3 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 TABLES Washington Works RFI Soil PFOA Results Washington Works RFI Surface Soil PFOA Results Washington Works RFI ADP SWMU Soil PFOA Results FIGURES PFOA Screening Level Assessment Model Comparison o f K ^'s for PFOA and Other Chemicals Little Hocking Water Association Well Field Soil PFOA Results Washington Works RFI Soil PFOA Results Washington Works RFI Surface Soil PFOA Results Washington Works RFI ADP SWMU Soil PFOA Results soil position paper4.doc Oct. 20, 03 Wilmington, DE EXP001454 I Site Screening Level A ssessm ents for PFO A and the Relevance of Soil Sampling Executive Summary EXECUTIVE SUMMARY DuPont's extensive implementation o f both media specific assessment modeling tools and comprehensive on-site and off-site soil, surface-water, and groundwater monitoring for perfluorooctanoate1at the Washington Works site in West Virginia allowed for compilation o f a generalized screening level assessment model.

Investigation Results Report2.wpd AR226-2348 Page 11 October 2 3 ,2 0 0 3 Mr.

AR226-2407 INTEROFFICE MEMORANDUM Date: From; Dept i Tel No 13-Mar-1990 06:26pm Nilliam E.

JEB. 26.2002 9:34AM afWSBtoiocte. lesam eovemmoni Center 12HQ.

Dupont Fluoroproducts AR226-2612 Chestnut Run Plaza P. 0 .

RECYCLED CO AR226-2625 mm AR226-2625 DuPont Engineering Barley Mill Plaza - Bldg. 27 4417 Lancaster Pike Wilmington, DE 19805 October 19,2004 Mr.

AR226-2641 AR226-2641 DuPont Modeling M ethodology and Results DRAFT Shimizu Site June 2003 About the Model I Industrial Source Complex Short Term 3 (ISCST3) I Sold/used globally, including in Japan http://www.phoenix-r.co.jp/products/products.htm I Input l Stack height, diameter I Flowrate, temperature I Mass of pollutant (kilogram per hour) I Local meteorological data (Shizouka 1997, 98, 99) 1 Output l Ambient air concentrations in ug/m3 I Max values and locations outside the property line Prevailing wind ai i i w i Facility Vapor reaches ground level Ambient annual ground level concentration in ug/m3 Model Calculations I Ambient air concentrations based on Gaussian Equation I Concentration a function of a vertical term and a dispersion term I Vertical term based on stack height, receptor elevation, plume rise, mixing 1 Dispersion parameters describe distribution of pollutant in lateral and vertical Shim izu M odeling Inputs Stack Param eters Source ID 2 3 4 Description Location Operations Beiahi. m Diameter, m Flowrate m3/hr Pre-scrubber exit for Tine powder Operates 24 hours scrubber (called *AC Scrubber* on mao) D Plant per day. 180 days per year 8 0.68 2400 Post-scrubber exit for fine powder Operates 24 hours scrubber (called `A C Scrubber* on per day. 180 days mao) D Plant per year Operates 24 hours 15 0.6 9600 E Plant: copolymer per day, 270 days D BC Scrubber plant for P F A and F E P per year 18.2 0.6 1620 M P-2 building: Operates 24 hours M P-2 scrubber copolymer type micro- per day, 200 days oowder per year 16.1 10.6 assumed 7500 / ' S7*----- ^ / (1) Given in email o f 4/17/03 from Hie etaka Hiromatsu: 600 s a mm square diameter.

HM6 .

AR226-2769 WASHINGTON WORKS GLOVE TESTING FOR C8 (Ammonium Perfluorooctanoat*> PBPMPa^rnW Haskell Laboratory Report No. 612-81 r 0t OValuation oi fivo types of gloves for their permeation below sSaLa^pllees3.of\t;hr g?

FOR^fi' PONT USE ONLY AR226-2888 E.