AR226-2653 AR226-2653 ISC Modeling Methodology and Results Introduction This report summarizes dispersion modeling that was completed for the DuPont Washington Works facility to demonstrate that the emission limits included in Permit Application 1823C for the Thermal Converter complies with the C-8 assessment of toxicity (CAT) recommended airborne screening level o f 1.0 ug/m3 at the property line fence.

HECYCLEO Ol Ol AR226-2665 en RESEARCH Precise Research.

AR226-2695 AR226-2695 Biodegradability of Telomer-Based Polymeric Products 1.

3-2j' DuPont-12966 TRADE SECRET Study Title H-25777: Inhalation Approximate Lethal Concentration (ALC) in Rats A uthor: David P.

M6_ I- 28 000235 DuPont Company Chambers Works PFOA in Blood -^ Chambers Works PFOA Recycle ntaawwasslPffdshauoaeannsoerbaoemvmtriddttausoeorePbn1kprp2c3rrr1eFe9aetall04ti0eoi9rotOnls0nros0srn9eady0g.AsrewolmpeuyatiwbwaTpaafsnhbpprlrbtb4haldootyrsley-l.2isii.oyrunsa2waascdwPlpg0WlqosocoahF0msuoncoonbuyiO0oorangndfologkrnduebnAtturkniehrtllaeelbceaiirdoeintftwdstrecnooieobseePtwvwrardadedwyliFtsosanoeoimcsOalhnhbdgrorvioetaokogeoAle2cmcdetrncndtva0eoaoroRepbmioc0stnwtdloa.eotele0lcepurreeviDtrceedtyowanicnyahnnduittluicgtheetgautPnhtrlshnedinoaeaoceicmresnatthianepte,irnlghPomadetyrtitheonnFcnazhg1fpecsyynOcibo9aeanelcas9allroiuAgeseollgs9tcesydffsweebn.f,hsrttepsleslihebreidottccrnoceiShassoaotne3ymthsiaalcCdvgce0comnlceaeeallhwsishipitnvlpn1naanosieeeee0lmbcmeggmeoadsl0lrrssbnuspbppaari.plddlwsetrlepooeeipotreBsohsifosesbcdutfnytrlsfdreWf.hloeooootswssessouAmpsartuoada.in<ecnWpmtrlnrohtdlak1mAphadlnpso0aotteyeaohtlo0sfsrlserzrnehorteaoadtsepschiictormldtn,puwitseooipgrmg.bnspanoreesieti.lsndnbarorBenedaeamwconsgrcatlbh,ocitashWpohiba1youespolnn9ulletnttcoillhsui9hstneedcorer9iecsekisbnetoonts1gldelacfoat9brdnufohbooo9odcuaoud9rttlthenpdd rTaenhloiiasthbelexerpmdearetitaehnaoctdethtlheeadltoDwwuoPlueolvdnetblsteoimnwwoorrhekicswehniwtshietaivwdeeiafrfenedirneptnertorecvsoitdneedtr.amcot raensaclyietinctaiflilcaablloyraatcocruyroatne and J) December 9,2004 Barbara J.

- 3V- 7 A R .& Z6 - }lf 1 ORGANIC FLUOROCQMP PONDS IK BLOOD In May, 1978/ 3M informed Du Pont of findings of organic fluorocompounds in blood of employees exposed to long-chain perfliioro-surface active materials. 3M reported airborne contaminant levels up to 81 ppm in their operations and organic fluorine blood levels of 1 to 71 ppm for exposed workers. 3M reports that some level of organic fluorine in humans is normal/ i.e. equal to or less than 1 ppm.

AR226-3650 Attachment A 000003 " > r4,~ V ANALYTICAL REPORT ST LT R E N T STL Denver 4 9 5 5 Yarrow Street Arvada, CO 8 0 0 0 2 Tel: 30 3 7 3 6 0 1 0 0 Fax: 3 0 3 4 3 1 7171 w w w .stl-inc.com PFOA Analysis Lot#: D6A270318 Dale VanDeVelde GE Plastics State Route 892 DuPont Road PO Box 68 Washington, WV 26181 Severn Trent Laboratories, Inc.

'3/ Qb J f-y*oc-3l5~ Garfield water Department Client Sample ID: Gli B U M D C D PARX PUKP STATION HPLC Lot-Sample fi... ; D8C060309-001 Work Order f . : KH51C1AA Date Sampled__ : 03/05/08 09:00 Date Received..: 03/06/08 Prep Date..... : 03/10/08 Analysis Date..: 03/12/08 Prep Batch ff___: 8070135 Analysis Time..: 22:21 Dilution Pactor: 1 Method DEN -LC-0012 Matrix PARAMETER PROS PFOA RESULT 0 .0 2 1 0.038 REPORTING LIMIT UNITS 0.010 ug/L 0.015 ug/L SURROGATE 13C4 PFOA 13C4 PFOS PERCENT RECOVERY 67 41 * RECOVERY LIMITS (50 - 200) (50 - 200) BOIB(S): ________________ * Sum m it recovery ti outtide rated conirot lmiti

Analytical Report Fluorochemical Characterization of Aqueous Samples Decatur Outfall 001 FC Monitoring (E03-0326) Exygen Research Laboratory Report No.

y)R 6 _ 0930 TSCA NCIC Notification Form for CBI Documents ElVED Docket Number: _ ft I?

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3 GLP10-01-02 Interim Report 25: Analysis of PFOS, PFHS and PFBS in Sediments Collected from the Jeffries Property Study Title 3M Environmental Laboratory Analytical Protocol GLP10-01-02: Analysis of Perfluorooctane Sulfonate (PFOS), Perfluorohexane Sulfonate (PFHS) and Perfluorobutane Sulfonate (PFBS) in Groundwater, Soil and Sediment for the 3M Decatur Phase 3 Site-Related Monitoring Program Data Requirement EPA TSCA Good Laboratory Practice Standards 40 CFR Part 792 Study Director Jaisimha Kesari P.E., DEE Weston Solutions, Inc. 1400 Weston Way W est Chester, PA 19380 Phone: 610-701-3761 Principal Analytical Investigator Cleston C.

3M Environmental Laboratory P0003268; Interim Report#2 Analytical Report Analysis of PFBS, PFHS, and PFOS from 3M Decatur Offsite Sediment Samples Interim Report #2 MPI GLP Protocol Number P0003268 Data Requirement 40 CFR Part 792 Author Michelle D.

CoSlcThLesBteurr,liVngetromnont Extended Data Package SDG: 117633 Case Narrative Chain of Custody................................................................................................

2 5 / J UN, 25. 1 9 9 9 0 1 2 : 4 1 P M p c f K E D I C A L 2 2 0 2E 0 2 n , u o u t e r s 57331773 NO, 0773 n P. 30 001 A W 2&-0253 REPORT EVALUATION OF THE MUTAGENIC ACTIVITY OF T-6906 IN AN i n v i t r o m a m m a l i a n c e l l g e n e m u t a t i o n t e s t WITH L517BY MOUSE LYMPHOMA CELLS (WITH INDEPENDENT REPEAT) NOTOX Project 223458 NOTOX Substance 7B741 page 1 of 31 9 TELEFAX oaTUu /OAT^: *aM/TO/H:M waB/enow/ce-,__ eET,/9UiJ.