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Email : David.W

.Boothe@usa.dupont.com Reply To: DAVIDW . BOOTHE E.1 . du Pont de Nemours and Company Director, Corporate Risk Management 1007 Market Street Wilmington, DE 19898 Telephone: 302.999.4091 Facsimile

: 302.999.3404
October 29, 2010 PUBLIC COPY - NOCBI

VIAOVERNIGHT DELIVERY OPPT Document Control Office (DCO) Attention: Docket ID Number EPA-HQ-OPPT-2006-0621 1201 Constitution Avenue, NW EPAEast Building, Room 6428 Washington, D

.C. 20004 Dear Sir/Madam

: 2010/15 PFOA Stewardship ProgramReport Please find enclosed, in both paper copy and on CD, the 2009 DuPont Report (CBI version) for the 2010/15 PFOA Stewardship Program . We look forward to further dialogue on ongoing reporting to best meet the program objectives.

David W . Boothe Attachment and Enclosure (Paper and CD) 

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# COmpany Sanitized -' ft

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 20102010/15 PFOA Stewardship Program October 30, 2009

DuPont Submission Page 1 of 1

Index of Documents - Public Version Document Number Document Number of On CD Date Document Pages 001 10.30.09 Transmittal letter for report 1 002-006 10.30.09 CBI 5 007 10.30.09 Appendix D- Facility Report on Product Content - Aqueous Fluoropolymer Dispersion 5 008 10.30.09 Appendix D- Facility Report on Product Content - Fluoroelastomer 6 009 10.30.09 Appendix D- Facility Report on Product Content - Fluorotelomer 7 010 10.30.09 Appendix F - Company Annual Report Summary of Reductions in Emissions and Product Content 3 O11 10

.30.09 CBI (Attachments) 28

Public Copy

# 2010/15 PFOA STEWARDSHIP PROGRAM October 29, 2010 DuPont Submission 

# Document 002 Claimed as Confidential Business Information

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010

# 2010/15 PFOA STEWARDSHIP PROGRAM October 29, 2010 DuPont Submission Document 003 Claimed as Confidential Business Information

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010

# 2010/15 PFOA STEWARDSHIP PROGRAM October 29, 2010 DuPont Submission Document 004 Claimed as Confidential Business Information

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010

# 2010/15 PFOA STEWARDSHIP PROGRAM October 29, 2010 DuPont Submission Document 005 Claimed as Confidential Business Information

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010

# 2010/15 PFOA STEWARDSHIP PROGRAM October 29, 2010 DuPont Submission Document 006 Claimed as Confidential Business Information

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010

# Appendix D Facility Report on Product Content Aqueous Fluoropolymer Dispersion COMPANY SANITIZED PUBLIC COPY

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010

## 2010/15 PFOA Stewardship Program Facility Report on Product Content COMPANY SANITIZED PUBLIC COPY
I . CHEMICAL IDENTIFICATION Identify the product (e.g fluoropolymer dispersion) for which you are submitting information: Product name: Aqueous Fluoropolymer Dispersion Product description (including concentrations of perfluoroalkyl chemicals identified in Section IV below

and year ofproduction) : Aqueous fluoropolymer dispersions of PTFE and melt copolymers [CBI] II . COMPANY IDENTIFICATION Identify the company and location of the facility submitting information:

Company name: E. I . du Pont de Nemours and Company Site location: [ CBI ] Identify a company technical contact who can respond to inquiries about the information submitted: Technical contact : Kirsten E. Myers Phone: 302-999-2111 Address: DuPont Chemicals &Fluoropolymers CRP 711/1100-G 4417 Lancaster Pike Wilmington DE, 19805

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010III . PRODUCTION

Calendar year for which you are reporting: Jan 1, 2009 to Dec 31, 2009

Provide the amount of the product for the reporting year at each specific site: Imported (not reported) kgs/yr Manufactured [ CBI ]

[ CBI ]

IV. PRODUCT CONTENT A . CONCENTRATIONS OF RELEVANT PERFLUOROALKYL CHEMICALS Please provide the concentrations (ppb) ofvarious perfluoroalkyl chemicals in your product. For chemicals for which you do not have actual data, please provide range estimates. The following is a nonexhaustive list of chemicals that should be included: PFOA and its salts " Octanoic acid, pentadecafluoro- (CAS 335-67-1) " Octanoic acid, pentadecafluoro- ammoniumsalt (CAS 3825-26-1) PFOAprecursors " Octane, l,1,l,2,2,3,3,4,4,5,5,6,6,7,7, 8,8-heptadecafluoro-8-iodo- (CAS 507-63-1) " 1-Decanol, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 678-39-7) " 1-Decene, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 21652-58-4) " 2-Propenoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl ester (CAS 27905-45-9) " 2-Propenoic acid, 2-methyl-, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl ester (CAS 1996-88-9) " 2-Decenoic acid, 3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-hexadecafluoro- (CAS 70887-84-2) " Decanoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 27854-31-5) Higher homologues " Dodecane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12-pentacosafluoro-12-- iodo- (CAS 307-60-8) " Decane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-heneicosafluoro-l0-iodo- (CAS 423- 62-1) " Nonanoic acid, heptadecafluoro- (CAS 375-95-1) COMPANY SANITIZED PUBLIC COPYN OCTOBER29, 2010" Decanoic acid, nonadecafluoro- (CAS 335-76-2)

" 1-Decanol, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 678-39-7) " Decane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-heptadecafluoro-10-iodo- (CAS 2043-53-0) " Dodecane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-heneicosafluoro-12-iodo- (CAS 2043-54-1) " 2-Propenoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl ester (CAS 4980-53-4) " 2-Propenoic acid, 2-methyl-, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,12- heneicosafluorododecyl ester (CAS 17741-60-5) B. ANALYTICAL METHODS PFOA concentration is measured on all production by Gas Chromatograph/Electron Capture Detector (GC/ECD) at the US and European sites and by High Performance Liquid Chromatography (HPLC) method at our Japan site. The Limit ofDetection (LOD) for the GC/EDmethod is 1 ppm . The LODfor the HPLC method is 3 ppm at this time.

COMPANY SANITIZED PUBLIC COPYN OCTOBER29, 2010p. 12

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# Appendix D

Facility Report on Product Content

Fluoroelastomers COMPANY SANITIZED PUBLIC COPY

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010

## 2010/15 PFOA Stewardship Program Facility Report on Product Content COMPANY SANITIZED PUBLIC COPY I . CHEMICAL IDENTIFICATION Identify the product (e .g., fluoropolymer dispersion) forwhich you are submitting information: Product name: Fluoroelastomer

Product description (including concentrations ofperfluoroalkyl chemicals identified in Section IV below and year ofproduction) : Elastomer made from

fluorinated monomers in aqueous dispersion with the ammoniumsalt of PFOA, i .e. Octanoic acid, pentadecafluoroammoniumsalt (CAS 3825-26-1)

II . COMPANY IDENTIFICATION Identify the company and location of the facility submitting information:

Company name: DuPont Performance Elastomers LLC Site location: [ CBI J Identify a company technical contact whocan respond to inquiries about the information submitted: Technical contact: Pascal Ferrandez

Phone: 240 994 4967 Address: Experimental Station ESL 323/127

200 Powder Mill Rd. Rt141 Wilmington, Delaware 19880-0323

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010III . PRODUCTION

Calendar year forwhich you are reporting: Jan 1, 2009_ to Dec 31, 2009

Provide the amount of the product for the reporting year at each specific site: Imported (not reported) kgs/yr Manufactured [ CBI ]

[ CBI ] IV. PRODUCT CONTENT A . CONCENTRATIONS OF RELEVANT PERFLUOROALKYL CHEMICALS Please provide the concentrations (ppb) ofvarious perfluoroalkyl chemicals in your product
. For chemicals for which you do not have actual data, please provide range estimates
. The following is a nonexhaustive list of chemicals that should be included : PFOA and its salts " Octanoic acid, pentadecafluoro- (CAS 335-67-1) " Octanoic acid, pentadecafluoro- ammoniumsalt (CAS 3825-26-1) PFOA precursors " Octane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7, 8,8-heptadecafluoro-8-iodo- (CAS 507-63-1) " 1-Decanol, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 678-39-7) " 1-Decene, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 21652-58-4) " 2-Propenoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl ester (CAS 27905-45-9) " 2-Propenoic acid, 2-methyl-, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl ester (CAS 1996-88-9) " 2-Decenoic acid, 3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-hexadecafluoro- (CAS 70887-84-2) " Decanoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 27854-31-5) Higher homologues " Dodecane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12-pentacosafluoro-12-~ iodo- (CAS 307-60-8) " Decane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-heneicosafluoro-10-iodo- (CAS 423- 62-1) " Nonanoic acid, heptadecafluoro- (CAS 375-95-1) Part IV (cont .) " Decanoic acid, nonadecafluoro- (CAS 335-76-2) " 1-Decanol, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 678-39-7) COMPANY SANITIZED PUBLICCOPY OCTOBER29, 2010" Decane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-heptadecafluoro-10-iodo- (CAS 2043-53-0)

" Dodecane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-heneicosafluoro-12-iodo- (CAS 2043-54-1) " 2-Propenoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl ester (CAS 4980-53-4) " 2-Propenoic acid, 2-methyl-, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,12- heneicosafluorododecyl ester (CAS 17741-60-5) B . ANALYTICAL METHODS The method of analysis consisted of aprocess of extraction using high purity methanol as the solvent, followed by LC-MS-MS analysis of the extract as described in the following article: Larsen, B

. S.,Kaiser, M

. A ., Botelho, M

., Wooler, G

. R ., Buxton, L. W

. Comparison of Pressurized Solvent and Reflux Extraction methods for the determination of perfluorooctanoic acid in polytetrafluoroethylene polymers using LC-MS-MS. Analyst. 2005, 130, 59-62 .

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# Appendix D Facility Report on Product Content

Fluorotelomers COMPANY SANITIZED PUBLIC COPY

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010

## 2010/15 PFOA Stewardship Program Facility Report on Product Content Confidential Business Information I . CHEMICAL IDENTIFICATION Identify the product (e.g fluoropolymer dispersion) for which you are submitting information:

Product name: Fluorotelomer-based polymeric and surfactant products Product description (including concentrations ofperfluoroalkyl chemicals identified in Section IV below and year of production) : Production year: 2009

[ CBI ] II . COMPANY IDENTIFICATION Identify the company and location of the facility submitting information:

Company name: E. I . du Pont de Nemours and Company Site locations: [ CBI ] Identify a company technical contact who can respond to inquiries about the information submitted: Technical contact: Stephen Korzeniowski

Phone: 302-695-8672 Address: DuPont Experimental Station

ESL 402-5231 Route 141 and Henry Clay Wilmington, DE 19803 III . PRODUCTION Calendar year forwhich you are reporting: Jan 1, 2009to Dec 31, 2009 Provide the amount ofthe product for the reporting year at each specific site:

Imported NA kgs/yr Manufactured [ CBI ] COMPANY SANITIZEDPUBLIC COPY OCTOBER 29, 2010IV

. PRODUCT CONTENT A . CONCENTRATIONS OF RELEVANT PERFLUOROALKYL CHEMICALS Please provide the concentrations (ppb) ofvarious perfluoroalkyl chemicals in your product
. For chemicals for which you do not have actual data, please provide range estimates. The following is a nonexhaustive list of chemicals that should be included: PFOA and its salts " Octanoic acid, pentadecafluoro- (CAS 335-67-1) " Octanoic acid, pentadecafluoro- ammonium salt (CAS 3825-26-1) PFOAprecursors " Octane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7, 8,8-heptadecafluoro-8-iodo- (CAS 507-63-1) " 1-Decanol, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 678-39-7) " 1-Decene, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 21652-58-4) " 2-Propenoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl ester (CAS 27905-45-9) " 2-Propenoic acid, 2-methyl-, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl ester (CAS 1996-88-9) " 2-Decenoic acid, 3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-hexadecafluoro- (CAS 70887-84-2) " Decanoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 27854-31-5) Higher homologues " Dodecane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12-pentacosafluoro-~12-iodo- (CAS 307-60-8) " Decane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-heneicosafluoro-l0-iodo- (CAS 423-62- 1) " Nonanoic acid, heptadecafluoro- (CAS 375-95-1) " Decanoic acid, nonadecafluoro- (CAS 335-76-2) " 1-Decanol, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro- (CAS 678-39-7) " Decane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-heptadecafluoro-10-iodo- (CAS 2043-53-0) " Dodecane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-heneicosafluoro-12-iodo- (CAS 2043-54-1) " 2-Propenoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl ester (CAS 4980-53-4) " 2-Propenoic acid, 2-methyl-, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,12- heneicosafluorododecyl ester (CAS 17741-60-5) [ CBI ]

COMPANY SANITIZED PUBLIC COPY OCTOBER 29, 2010B

. ANALYTICAL METHODS - Not CBl The general methods used for the analyses reported here have been published in the following article: Larsen, B.S.; Stchur, P . ; Szostek, B

. ; Bachmura, S.F. ; Rowand, R .C.; Prickett, K

.B. ; Korzeniowski, S.H. ; Buck, R .C. Method development for the determination of residual fluorotelomer raw

materials and perfluorooctanoate in fluorotelomer-based products by gas chromatography and liquid chromatography mass spectrometry. Journal of Chromatography A. 2006 (1110),117-124. In general the LOQ

was 2ppm

and LODwas 0

.7 ppm . Unpublished improvements have been made to the PFOA method providing for an LOQ of 0 .5 ppm and an LODof 0

.15 ppm . This improved method was used in 2007 - 2009.

COMPANY SANITIZED PUBLICCOPY OCTOBER 29, 2010p. 23

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Company Annual Report - Summary of Reductions in Emissions and Product Content

Company Sanitized Public Copy

CONFIDENTIAL BUSINESS INFORMATION OCTOBER29, 20100 N N O U



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# 2010/15 PFOA STEWARDSHIP PROGRAM October 29, 2010 DuPont Submission Document 011 Claimed as Confidential Business Information

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010Index of Attachments

1a Attachment 1a - Pascagoula PFOA RESULTS LTR01-2009thru 06-2009, 1 b. Attachment 1 b - Pascagoula PFOA RESULTS LTR06-2009 thru 12-2009 2 . Fayetteville biennial report - 2002 and 2003 3. Fayetteville biennial report - 2004 and 2005 3a. CBI 3b. CBI 4 . CBI 5 . CBI 6 . CBI

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010Attachment 1 A 1 .31

Sincerely, IIZST CHEMICAIL CORPOF 1001 Industrial Road Pascagoula . MS 39581-3237 USA DO Box 7005 Pascagoula MS 39568-7005 USA 228 762-0870 Fax: 228 769-5355 

# S First Chemical Corporation

A DuPont Company August 25, 2009

Certified Mail No 7008 18300004 9185 8334 Return eceivt Requested Mr . Toby Cook, PE Environmental Permits Division Mississippi Department of~Environmental Quality P OBox 2249 Jackson, MS 39225-2249 Dear Mr Cook: RE: MSP090360, Cc
Please find attached First Chemical Corporation's PFOA discharge results for ourw : January throughTune, 2009 as required by the above referenced discharge permit. C nuintained on site andcan be made readily availableto youor your agency upon rec collectedas 24-hour compositesamples and analyzed by an independent contract lat a minimum

detection level ofless than one (1-0) partper billion (ppb) . The results a concentration and mass loading .. Ifyou have any questions or need any further information, please contact Cari Field, 228-938-2264

James Freeman Operations and Maintenance N

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010/

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1001 Industrial Road Pascagoula, MS 39581-3237 USA P0 Box 7005 Pascagoula MS 39568-7005 USA 228 762-0870 Fax: 228 769-5355 

## SFirst Chemical Corporation

ADuPont Company February 24, 2010

Certified Mail No : 7008 18300004 9185 8556 Return Receipt Req-uested Ms Carla Blown Environmental Permits Division Mississippi Department of Environmental Quality P O . Box 2249 Jackson, MS 39225-2249 RE: MSP090360, Conditions M-1 & S-1 Dear Ms Brown

: Please find attached First Chemical Corporation's PFOA discharge results for our wastewater for the months of June through December, 2009as required bythe above referenced dischage permit Copies ofall lab results an maintained onsiteand can be made readilyavailable to you or your agency upon request All samples were collected as 24-hour composite samples and analyzed by an independent contract lab using a test method having a minimum

detection level of'less than one (1 .0) part per billion (ppb) The results arereported inunits ofboth concentration and mass loading If you have any questions or need any further information, please contact Can Field, Environmental Affairs, at 228-938-2264 Since :ely, FIRSI CHEMICAL CORPORAI ION

Whit Griffin Plant Manage _p. 33

_

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010

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COMPANYSANITIZED PUBLIC COPY OCTOBER29, 2010p. 35 ATTACHMENT 2 

### Biennial Report for the Manufacture of APFO Calendar Years of 2002 and 2003 DuPont Company - Fayetteville Works Note: The information contained in this document is submitted voluntarily and may be subject to future revision and/or modification.

CONFIDENTIAL BUSINESS INFORMATION IS BRACKETED This report is submitted pursuant to commitments made by DuPont in a March 14, 2003, Letter of Intent (LOI) to Stephen L. Johnson, Assistant Administrator, USEPA, entitled "Voluntary Actions to Evaluate and Control Emissions ofAmmonium Perfluorooctanoate (APFO) . Pursuant to Addendum III of this LOI, provision 5, a facility manufacturing APFO is required to, beginning in the year after production commences, and continuing for five consecutive years f6llowing, for the prior calendar year, report to EPAbiennially the following information on a calendar year basis: 1 . Annual production volume ofAPFO ; 2. Emissions per facility (air, water, waste) ; 3. Summary report of groundwater monitoring results; 4 . Summary report of surface water monitoring results; 5. Workplace industrial hygiene monitoring; and 6 . Summary data on employee blood monitoring results. This report provides the above information for calendar years 2002 and 2003. 

### General Facility Information

Company Name: E. 1. du Pont de Nemours and Company Site Location: Site where APFOis manufactured:

DuPont Company - Fayetteville Works 22828 NCHighway 87 W Fayetteville, NC 28306-7332

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010Annual production volume ofAPFO ATTACHMENT 2

The DuPont Company - Fayetteville Works' APFO Manufacturing Facility commenced production in late 2002 . The following table shows the total production volume ofAPFOfor calendar years 2002 and 2003.

Calendar Year APFOProduction 2002 [CBIJ 2003 [ CBI]

1. Emission per facility (air, water, waste) ; Confidential Business Information

The DuPont Company - Fayetteville Works' APFO Manufacturing Facility has estimated the quantity of PFOA emitted to the atmosphere as air emissions using engineering calculations
. In addition, stack testing performed in 2003 showed the PFOA emissions to be less than the analytical detection limit.' Annually a sample of the site's surface water discharge to the Cape Fear River is analyzed for PFOA; however that monitoring shows the PFOA to be less than the quantification limit of the analytical method. The waste emissions are the quantities of PFOA, on a dry basis, that are estimated to have been present in the various solid waste streams transferred from the Fayetteville Works site. The following table gives the estimated emissions of APFO to specific media fromthe Fayetteville Works during the subject years:

Emission Media 2002 2003 Air 17 lb. 22 lb. Water Note 1 NQ Waste 35 lb. 3,236 lb. Note 1 : Due to the late start-up of the APFOManufacturing Facility and the short

duration of the 2002 production run, no surface water monitoring occurred in 2002. NQ=1ess than the practical analytical quantification limit of 0 .05 pg/L

' While APFOis the substance manufactured at the facility, the substance measured by analytical techniques is the perfluorooctanoate anion (PFOA) COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010p. 37

2 . Summary report of groundwater monitoring results In 2002, the DuPont Company - Fayetteville Works performed air dispersion modeling to determine the most probable locations for the atmospheric deposition of PFOAfromthe new manufacturing facility. New

monitoring wells were installed in the surficial aquifer at the two locations predicted by the modeling. In 2003, the Fayetteville Works site began annual monitoring ofthe groundwater for PFOA . The monitoring involved the two newly installed wells described above, and included two existing monitoring wells. Groundwater monitoring conducted in January and March 2003 showed no quantifiable levels of PFOA in the two new

wells and the existing well at the Old Biosludge Lagoon (SMU-O1, SWM-02, and MW-1 S respectively) . These monitoring events did indicate levels of PFOAabove the quantification limit at the existing well located upgradient of the Nafion®Common Sump. Following discussions with the North Carolina Division of Waste Management, the 2004 groundwater monitoring was expanded to include three existing wells downgradient ofthe Nafion® Common Sump area. The 2004 monitoring results were virtually identical to those in 2003, and the three above-mentioned downgradient wells showed PFOA concentrations of 0.303 ~tg/L, 1 .530 ~tg/L, and 0 .123 ~tg/L respectively. It is believed that the detected PFOA is a result of a historical release originating fromthe Nafion©manufacturing area's common process wastewater sump. That source has been eliminated fromthe site.

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010The followingtable shows the groundwater

monitoring analytical results for 2003 and 2004Sample Name (Monitoring Well Descri p tion) Monitoring Date PFOA

(~Lg/L) SMU-O1 01/27/03 <0.01 (New well on River Pump Road; 03/27/03 <0.01 East ofAPFOFacility) 02/04/04 <0 .01 SW-02 01/27/03 <0.01 (New well at Construction Gate entrance; 03/27/03 <0.01 Southwest ofAPFOFacility) 02/04/04 <0.01 MW-1 S 01/28/03 <0.05 (Existing well at Old Biosludge Lagoon SWMU O1/28/03 <0.05 by Central WWTP

; South ofAPFOFacility) 03/27/03 <0 .05 02/04/04 <0 .05 NAF-01 01/27/03 0.065 (Existing well upgradient of Nafion®Common 03/27/03 0 .068 Sump; Southeast ofAPFOFacility) 03/27/03 0 .063 02/04/04 0

.062 NAF-02 (Existing well downgradient of Nafion© Common Sump; Southeast ofAPFOFacility) 02/04/04 0 .303 NAF-03 (Existing well downgradient of Nafion® Common Sump; Southeast ofAPFOFacility) 02/04/04 1 .530 NAF-04 (Existing well downgradient ofNafion® Common Sump; Southeast ofAPFOFacility) 02/04/04 0 .123

3 . Summary report of surface water monitoring results As reported in Item 1 above, the DuPont Company - Fayetteville Works annually monitors for PFOA in the site's surface water discharge to the Cape Fear River. The monitoring conducted in both 2003 and 2004 shows the PFOA to be less than the quantification limit of the analytical method, or less than 0 .05 ~tg/L. No surface water monitoring occurred in 2002 due to the late start-up of -the APFO Manufacturing Facility and the short duration of the 2002 production run. 4 . Workplace industrial hygiene monitoring The DuPont Company - Fayetteville Works began workplace monitoring for PFOAwith the start up of the APFOManufacturing Facility in 2002. The workplace monitoring in 2002 and 2003 consisted of stationary area monitors that sampled the building air space for twelve (12) continuous hours. These sampled locations are limited access restricted areas in which personnel wear both respiratory COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010p. 39

and dermal personnel protection. The analytical results reported in the following table are the 12- hour time weighted average (TWA) PFOA concentration values. Year Sample Type Number Minimum Maximum Average of Conc. Conc. Conc. Samples (mg/m') (mg/m3) (mg/m') 2002 Area 12-hr 4 0 .008 0

.024 0

.017 TWA 2003 105 0 .000 0

.292 0

.010 mg/m3 = milligrams per cubic meter 5 . Summary data on employee blood monitoring results At the DuPont Company - Fayetteville Works, blood serumlevels of PFOA have been :measured since 2002. Asummary ofresults of employees with identified APFOexposure potential in 2002 and 2003 is presented in the table below . The entire data set of blood concentrations is available upon request. Number of Minimum Maximum Average Concentration Concentration Concentration Samples (ppm) (ppm) (ppm) Year 2002 17 0 .004 0

.020 0

.011 2003 44 0 .008 2.280 0 .217

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010p. 40 ATTACHMENT 3 LETTER OF INTENT SUBMISSION Biennial Report for APFOManufacture Calendar Years of 2004 and 2005 E. I . du Pont de Nemours and Company Fayetteville Works Site Bladen County, North Carolina Note: The information contained in this document is submitted voluntarily and maybe subject to future revision and/or modification.

CONFIDENTIAL BUSINESS INFORMATIONIS BRACKETED This report is submitted pursuant to commitments made by E.I . du Pont de Nemours and Company (DuPont) in a March 14, 2003, Letter of Intent (LOI) to Stephen L. Johnson, Assistant Administrator, United States Environmental Protection Agency (EPA), entitled "Voluntary Actions to Evaluate and Control Emissions ofAmmoniumPerfluorooctanoate (APFO)" . Pursuant to Addendum III, provision 5, of this LOI, a facility manufacturing APFOwill, beginning in the year after production commences, and continuing for five consecutive years following, for the prior calendar year, report to EPA biennially the following information on a calendar year basis: 7. Annual production volume ofAPFO ; 8. Emissions per facility (air, water, waste) ; 9 . Summary report of groundwater monitoring results; 10. Summary report of surface water monitoring results; 11 . Workplace industrial hygiene monitoring; and 12. Summary data on employee blood monitoring results. This report provides the above information for calendar years 2004 and 2005, and includes data received as of May 15, 2006, for the Fayetteville Works site ("the site") . General Facility Information

Company Name: E. I . du Pont de Nemours and Company Site Location: Site where APFOis manufactured:

DuPont Company - Fayetteville Works 22828 NC Highway 87 W Fayetteville, NC 28306-7332

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010p. 41 ATTACHMENT 3 

### 6. Annual production volume ofAPFO The following table shows the total production volume ofAPFOfor calendar years 2004 and 2005.

Calendar Year APFOProduction 2004 [CBI] 2005 [CBIJ
7 . Emission per facility (air, water, waste) Confidential Business Information

For air emissions, the quantity of APFO emitted to the atmosphere in 2004 and 2005 fronn the site was estimated using engineering calculations. For surface water emissions, annually a sample of the site's final surface water discharge to the Cape Fear River is tested for the presence of APFOZ. For 2004 and 2005, results showed APFOto be less than the analytical method's quantification limit of 0 .050 ~tg/L (0.050 parts per billion) . The reported emissions were calculated using this analytical result (<0 .050 ~tg/L) and the average discharge flow rate (12.397 million gallons per day in 2004 and 10 .441 million gallons per day in 2005) . The waste emissions are the quantities of APFO, on a dry basis, that are estimated to have been present in the various solid waste streams transferred fromthe Fayetteville Works site. The following table gives the estimated emissions of APFO to specific media fromthe Fa.yetteville Works during the subject years:

Media 2004 2005 Air 47 .3 lb. 55 .5 lb. Water <1 .9 lb. <l . 6 lb. Waste 9,914 lb. 10,019 lb. 8 . Summary report of groundwater monitoring results In 2004, 2005, and 2006, the Fayetteville Works site continued the annual groundwater monitoring for APFOthat began in 2003. The monitoring involved both newly installed wells and existing monitoring wells. All groundwater and surface water concentrations are reported as APFO (see footnote 1 on this page) . This report also provides results available as of May 30, 2006

2 While APFO is the substance manufactured at the facility, the substance measured by analytical techniques is the perfluorooctanoate anion (PFO-) . The commercial laboratory converts this analytical result to an APFO value via molecular weight calculations. For consistency with the previously submitted biennial report for this site, results are reported as the calculated APFOvalues. COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010ATTACHMENT 3 The following table reports the groundwater monitoring analytical results, both onsite and offsite, for 2004, 2005, and year-to-date 2006:

Summary of Groundwater Analytical Results DuPont Fayetteville Works

2004 -2006 Sample ID Monitoring APFO (Groundwater Monitoring Well Description) Date GLg/L,) MW-1S 02/03/04 NQ (<0.050) Onsite monitoring well located near the inactive Biosludge 06/20/05 NQ (<0.050) roundwater above a local clay erched oon area in the L g

p ag feature; South ofthe APFOManufacturing Facility. O1/24/06 0.038 MW-2S Onsite monitoring well located near the inactive Biosludge 06/20/OS NQ (<0.050) Lagoon area in the perched groundwater above a local clay feature; South of the APFOManufacturing Facility. MW-5D Onsite monitoring well located near the inactive Biosludge 06/20/OS NQ (<0.050) Lagoon area in the surficial groundwater beneath a local clay feature; South of the APFOManufacturing Facility. MW-7S Onsite monitoring well located near the inactive Biosludge Lagoon area in the perched groundwater above a local clay 10/18/OS 0.047 feature; South of the APFOManufacturing Facility. MW-10D Onsite monitoring well located near the inactive Biosludge 06/20/OS ND (<0.100) Lagoon area in the surficial groundwater beneath a local clay feature; South of the APFOManufacturing Facility. NAF-01 02/04/04 0.062 Onsite monitoring well located upgradient of the Nafion® 06/15/05 0.104 Common Sump in the perched groundwater above a local clay 10/13/05 0.151 feature; Southeast ofthe APFO Manufacturing Facility. 02/O1/06 0.115 NAF-02 02/04/04 0.307 Onsite monitoring well located downgradient of the Nafion® 06/15/05 0.338 Common Sump in the perched groundwater above a local clay 10/14/05 0.24~6 feature; Southeast of the APFOManufacturing Facility. 02/O1/06 0.316 NAF-03 02/04/04 1 .530 Onsite monitoring well located downgradient of the Nafion® 06/15/05 0.663 Common Sump in the perched groundwater above a local clay 10/14/05 0.872 feature; Southeast of the APFOManufacturing Facility. O1/25/06 0.4-34 ~Lg/L = micrograms per liter or parts per billion COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010Summary of Groundwater Analytical Results DuPont Fayetteville Works 2004 -2006 ATTACHMENT .3 Sample ID (Groundwater Monitoring Well Description) Monitoring Date APFI3

GLg/L) NAF-04 02/04/04 0 .124 Onsite monitoring well located downgradient of the 06/17/05 0 .093 Nafion®Common Sump in the perched groundwater 10/18/05 0.21 :2 above a local clay feature; Southeast of the APFO 02/O1/06 0 .06.5 NAF-05A well located downgradient ofthe Onsite monitorin 11/11/04 0 .239 g Nafion®Common Sump in the perched groundwater above a local cla feature.- Southeast of the APFO 10/13/05 0 .187 NAF-05B Onsite monitoring well located downgradient of the Nafion®Common Sump in the surficial groundwater beneath a local clay feature; Southeast ofthe APFO Manufacturing Facility. 11/11/04 ND (<0 .010)

NAF-06 06/16/05 0.262 Onsite monitoring well located northeast of the Fluoromonomers production area in the perched 10/14/05 0 .535 groundwater above a local clay feature; Southeast ofthe O1/31/06 0 .303 NAF-07 06/16/05 NQ (<0 .050) Onsite monitoring well located northeast of the Fluoromonomers production area in the perched 10/14/05 0 .085 groundwater above a local clay feature; Southeast of the F M n f in Faci l i ty. O1/31/06 0.065 NAF-08A 06/17/05 0 .072 Onsite monitoring well located southeast of the Fluoromonomers production area in the perched 10/13/05 0 .172 groundwater above a local clay feature' Southeast of the cility 01/31/06 0 .053 NAF-08B 06/21/05 ND (<0 .010) Onsite monitoring well located southeast ofthe Fluoromonomers production area in the surficial 10/13/05 NQ (<0.011) groundwater beneath a local clay feature; Southeast of O1/31/06 NQ (<0 .012) NAF-09 06/16/05 0 .080 Onsite monitoring well located south ofthe h d i h 10/13/05 0 .1121 e perc e n t Fluoromonomers production area groundwater above a local cla y feature; Southeast of the 02/O1/06 0 .086 p,g/L = micrograms per liter or parts per billion COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010Summary of Groundwater Analytical Results DuPont Fayetteville Works

2004- 2006 Attachment 3 Sample ID Monitoring APF0 (Groundwater Monitoring Well Description) Date (gg/L) NAF-10 06/16/05 0 .122 Onsite monitoring well located south ofthe 10/13/05 0 .134 h i th d i d e perc

n e on area Fluoromonomers pro uct oundwater above a local cla y feature ; Southeast of the 02/O1/06 0 .0813 NAF-11A 07/05/05 NQ (<0 .05) Onsite monitoring well located northeast of the Fluoromonomers production area in the perched 10/17/05 0 .021 groundwater above a local clay feature; Southeast of the 01/26/06 0.048 NAF-11 B Onsite monitoring well located northeast of the 07/05/05 ND (<0 .010) Fluoromonomers production area in the surficial groundwater beneath a local clay feature; Southeast of the APFO 10/17/05 ND (<0 .002) 4328MLR 11/16/05 0 .011 Offsite private residential drinking water well ; Northeast of the APFOManufacturing Facility. 11/16/05 NQ (<0 .022) 6999PED 11/16/05 ND (<0 .005) Offsite private residential drinking waterwell ; Northwest ofthe APFOManufacturing Facility. 11/16/05 ND (<0 .002) PW-01 Offsite private residential drinking water well ; West of O1/25/06 ND (<0 .002) the APFOManufacturing Facility. PW-02 Offsite transient noncommunity public water system ; O1/25/06 ND (<0 .002) West of the APFOManufacturing Facility. PW-03 Offsite transient noncommunity public water system ; O1/25/06 ND (<0 .002) Southeast of the APFOManufacturing Facility. PW-04 Onsite transient noncommunity public water system ; O1/25/06 ND (<0 .002) Northwest of the APFOManufacturing Facility. PW-05 Offsite transient noncommunity public water system ; O1/25/06 NQ (<0 .012) North-northwest ofthe APFOManufacturing Facility. ~Lg/L = micrograms per liter or parts per billion

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 2010Summary of Groundwater Analytical Results DuPont Fayetteville Works 2004 -2006 ATTACHMENT .3 Sample ID Monitoring APFtJ (Groundwater Monitoring Well Description) Date (p.g/L) PW-06 Offsite transient noncommunity public water system ; O1/25/06 ND (<0.002) North-northwest of the APFOManufacturing Facility. PW-07 Offsite private residential drinking water well ; South- 03/30/06 ND (<0 .001) southwest of the APFOManufacturing Facility. PZ-04 Onsite monitoring well located southeast of Naflon® 02/O1/06 0 .617 Common Sump in the perched groundwater above a local clay feature; Southeast of the APFOManufacturing Facility. PZ-12 10/17/05 0 .021 Onsite monitoring well located southeast of the APFO 12/13/05 0 .015 d t b h h d F ili i f i ove groun wa er a e perc e ty n t actur ng ac Manu a local clay feature. Ol/26/06 0.018 PZ-15 Onsite monitoring well located northwest ofthe PMDF O1/26/06 0 .032 Facility in the perched groundwater above a local clay feature; South-southeast ofthe APFOManufacturing Facility. PZ-16 Onsite monitoring well located southeast of the PMDF O1/26/06 NQ (<0 .012) Facility in the perched groundwater above a local clay feature; South-southeast of the APFOManufacturing Facility. SMW-O1 02/03/04 ND (<0 .010) Onsite monitoring well located east of the Construction 06/20/05 ND (<0 .010) if 87 i th fi i l Hi h G er; n e sur c a aqu g way ate entrance near Southwest ofthe APFOManufacturing Facility. O1/24/06 ND (<0 .002) SMW-02 02/03/04 ND <0.010 Onsite monitoring well located north of the River Pump 06/20/05 ND <0.010 Road, north of the Fluoromonomers manufacturing area, 09/06/05 N <0.007 in the perched groundwater above a local clay feature; 10/17/05 ND <0.002 East of the APFOManufacturing Facility. O1/26/06 NQ (<0 .012) p,g/L = micrograms per liter or parts perbillion

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 201.0Summary of Groundwater Analytical Results DuPont Fayetteville Works 2004 -2006 ATTACHMENT .; Sample ID Monitoring APFO (Groundwater Monitoring Well Description) Date (pg/L,) SMW-02B Onsite monitoring well located north ofthe River Pump Road, north of the Fluoromonomers manufacturing area, 10/17/05 ND (<0 .022) in the surficial groundwater beneath a local clay feature; East of the APFOManufacturing Facility. SMW-04B 10/17/05 2.25 Onsite monitoring well located north of the River Pump 11/10/05 2.51 in the Facilit APFOManufacturin th fth d R y, g , nor o e oa surficial groundwater beneath a local clay feature. O1/24/06 1 .30 SMW-05 10/17/05 147 Onsite monitoring well located north of and adjacent to the APFOManufacturing Facility, in the perched 12/13/05 765 SMW-05P Onsite monitoring well located north of and adjacent to 02/22/06 6 .5 the APFOManufacturing Facility, in the surficial SMW-06 12/13/05 0 .224 Onsite monitoring well located east of and adjacent to the APFOManufacturing Facility, in the perched Ol/26/06 0 .261 SMW-07 10/17/05 0.019 Onsite monitoring well located south of and adjacent to 12/13/05 NQ (<0 .012) the APFOManufacturing Facility, in the perched Ol/26/06 NQ (<0 .012) #562877 - Domestic H20 Inactive onsite drinking water well located near the 07/15/04 ND (<0 .010) Powerhouse area, screened in the Upper Cape Fear #562878 - Domestic H20 Inactive onsite drinking water well located near the 07/15/04 ND (<0 .010) Powerhouse area, screened in the Upper Cape Fear INSITU#1 Shallow Onsite monitoring well located near the facility's 12/20/05 NQ (<0.013) northern property line in the upper level of the surficial urnrnmnwnrer~ North-nnrrneacr of the farri ) p .g/L = micrograms per liter or parts per billion

COMPANY SANITIZED PUBLIC COPY OCTOBER29, 20110Summary of Groundwater Analytical Results DuPont Fayetteville Works 2004 -2006 ATTACHMENT .3 Sample ID Monitoring APFIJ (Groundwater Monitoring Well Description) Date (n/L) INSITU #2 Deep Onsite monitoring well located near the facility's 12/20/OS ND (<0 .027) northern property line in the lower level of the surficial groundwater; Northwest of the APFOManufacturing Facility. INSITU#2 Shallow Onsite monitoring well located near the facility's 12/20/05 NQ (<0 .013) northern property line in the lower level of the surficial groundwater; Northwest of the APFOManufacturing Facility. LTW-01 Onsite monitoring well located near the facility's eastern 02/02/06 0 .033 property line along the Cape Fear River in the surficial groundwater; East of the APFOManufacturing Facility. LTW-02 Onsite monitoring well located near the facility's eastern property line along the Cape Fear River in the surficial 02/02/06 ND (<0 .002) groundwater; East-southeast of the APFO Manufacturing Facility. LTW-03 Onsite monitoring well located near the facility's eastern property line along the Cape Fear River in the surficial 02/O1/06 ND (<0 .002) groundwater; East-southeast of the APFO Manufacturing Facility. LTW-04 Onsite monitoring well located near the facility's eastern O1/24/06 ND (<0 .002) property line along the Cape Fear River in the surficial groundwater; Southeast of the APFOManufacturing Facility. LTW-05 Onsite monitoring well located near the facility's eastern 02/02/06 ND (<0 .002) property line along the Cape Fear River in the surficial groundwater; Southeast of the APFOManufacturing Facility. 4g/L = micrograms per liter or parts per billion COMPANY SANITIZED PUBLIC COPY OCTOBER29, 20109

. Summary report of surface water monitoring results The Fayetteville Works facility annually monitors for APFO in the site's surface water discharge to the Cape Fear River. This monitoring location is the site's final effluent discharge at the NPDES permitted Outfall 002. The results of that monitoring are shown in the following table: Surface Water Sample ID Monitoring APFO (Sample Description) Date (pg/L) Outfa11002 02/03/04 NQ Final NPDES permitted wastewater discharge; Located (<0 .0~50) south ofthe central wastewater treatment plant and 06/20/05 NQ south of the APFOManufacturing Facility. (<0 .050) 01/24/06 0

.025 p,g/L = micrograms per liter or parts perbillion Monitoring of stagnant water in a stormwater conveyance ditch was conducted in 2005. While this stagnant water meets the definition of a surface water, it should be noted that this water consisted of exclusively non-flowing puddles of water at the time of the sampling. The results of that monitoring are shown in the following table: Surface Water Sample ID (Sample Description) Monitoring Date APFO

(pg/L) SW-01 06/20/2005 0.100 Stormwater ditch north of Fluoromonomers area; East 09/06/2005 0.129 of the APFOManufacturing Facility. 10/07/2005 0 .068 SW-02 06/20/2005 0 .135 Stormwater ditch north ofFluoromonomers area; East 09/06/2005 0 .302 of the APFOManufacturing Facility. 10/07/2005 0 .157 SW-03 06/21/2005 0-142 Stormwater ditch north of Fluoromonomers area; East 09/06/2005 0 .298 ofthe APFOManufacturing Facility. 10/07/2005 0 .149 SW-04 06/20/2005 0 .093 Stormwater ditch north ofFluoromonomers area; East 10/07/2005 0 .147 SW-05 Stormwater ditch north of Fluoromonomers area; East of the APFOManufacturing Facility. 10/07/2005 0 .139 p,g/L = micrograms per liter or parts per billion
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Sampling of two unnamed tributaries to the Cape Fear River, and two streams flowing to one of those tributaries, was conducted in 2006. It is believed that the base flow in these tributaries is primarily from expressed groundwater, with additional episodic flow from stormwater runoff. The surface water samples described in the table that follows were taken during base flowconditions. The results of that monitoring are shown in the following table: Surface Water Sample ID Monitoring APFO (Sample Description) Date (pg/L) SW-06 Located east of the Fluoromonomers area, in an O1/25/2006 0 .027 unnamed tributary (#1) to the Cape Fear River SW-07 Located east of the Fluoromonomers area, in a stream O1/25/2006 0 .040 (#1) flowing into the unnamed tributary #1 SW-08 Located east of the Fluoromonomers area, in a stream O1/25/2006 0 .032 (#2) flowing into the unnamed tributary #1 SW-09 Located east of the PMDF manufacturing area, in an O1/25/2006 0 .027 unnamed tributary (#2) to the Cape Fear River pg/L = micrograms per liter or parts perbillion In 2005, the site's non-contact cooling water and the influent and effluent of the river water sediment basin were sampled. Both of these waters ultimately discharge through the site's NPDES permitted Outfall 002. The non-contact cooling water is rawriver water that is pumped from the Cape Fear River, through equipment to remove heat, and then back to the river. The river water sediment basins receive river water and its sediment that has been removed fromthe river water as a result of clarification. The results of that monitoring are shown in the following table:

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010Surface Water Sample ID Monitoring APF7O (Sample Description) Date (~Lg/L) NR-01 Non-contact, once-through cooling water flowing in the 09/06/2005 0 .0',77 open ditch south ofthe Fluoromonomers area; East of the APFOManufacturin Facilit RW-O1 Influent to the filtered river water sediment basin 09/06/2005 0 .083 located west of the Fluoromonomers area; East of the APFOManufacturin Facilit RW-02 Effluent fromthe filtered river water sediment basin 09/06/2005 0 .081 located west of the Fluoromonomers area; East of APFOthe Manufacturin Facility ~Lg/L = micrograms per liter or parts per billion 10. Workplace industrial hygiene monitoring The DuPont Company - Fayetteville Works began workplace monitoring for perfluorooctanoic acid (PFOA) with the start up of the APFOManufacturing Facility in 2002. The workplace monitoring in 2004 and 2005 consisted of stationary area monitors that sampled the building air space for twelve (12) continuous hours. These sampled locations are limited access restricted areas in which personnel wear both respiratory and dermal personnel protection. The 12-hour time weighted average (TWA) PFOA concentration values are shown in the following table: Number pFOA PFOA PFOA Year Sample Type Of Minimum Maximum Average Samples Conc. Conc. Conc.

(mg/m3) (mg/m3) (mg/in;, 2004 Area 12-hour 85 0 .00021 1 .9 0 .041 2005 TWA 42 <0 .00021 0

.061 0

.0081 mg/m3 = milligramsper cubic meter 11 . Summary data on employee blood monitoring results At the DuPont Company - Fayetteville Works, blood serumlevels of PFOA have been measured since 2002. A summary of results of employees with identified APFOexposure potential in 2004 and 2005 is shown in the following table:

COMPANY SANITIZEDPUBLIC COPY OCTOBER29, 2010PFOA PFOA PFOA Number of Minimum Maximum Average Year Samples Concentration Concentration Concentration (ppm) (ppm) (ppm) 2004 56 0 .0027 1 .87 0 .437 2005 64 0 .0031 4.54 0 .504
ppm=parts per million Additional monitoring information Additional APFO monitoring information that is not specified by the LOI is being reported in Appendix Aof the site's Phase II RCRA Facility Investigation (RFI) Report . This additional information will be the analytical results for APFO concentrations of samples taken of soil, sediment, ambient air, and the Cape Fear River. A copy of the Phase II RFI Report was submitted to the N .C. Division of Waste Management on June 30, 2006 and will be provided to EPADocket OPPT-2003-0012 as a separate submission.

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