AR226-2244 Thompson Collins Watkins Smith _______________________________ Name_____________________________________ Concentrations are from the deposition modeling runs, and Include wet and dry depletion due to deposition EDDOO6 5 8 3 3 Particulate Vapor Total Deposition Deposition Deposition Coordinates (q/m2/yr) (q/m2/yr) (g/m2/yr) 445213E 4346090N 443141E 4345753N 443223E 4345847N 443254E 4345S88N 0.00098 0.00179 0.00193 0.00186 0.00008 0.00021 0.00019 0.00018 0.00106 0.00200 0,00212 0.00204 Particulate Vapor Total Concentration Concentration Concentration (ug/m3) iu g /m 3) (ug/m3) 0.02000 0.03217 0.05217 0.037S2 0.05854 0.09606 0.03665 0.05695 0.09360 0.03554 0.05587 0,09141 EDDO O6 5 8 3 4

AR226-2333 GAB0O0373 Source 1D '1 2 3, 4 Description Pre-scrubber exit for fine powder scrubber (called "AC Scrubber" on map) Post-scrubber exit for fine powder scrubber (called "AC Scrubber" on map) DBC Scrubber MP-2 scrubber Location Contribution, Height, m ug/m3 Contribution, % D Plant 8 7.002 50 D Plant 15 E Plant; copolymer plant for PFA and FEP MP-2 building: copolymer type micro- 18.2 16.1 3.345 2.953 0.771 total = 14.071 24 21 5 w H O tHr \ source parameters 5-1-03.xls Contribution ?

AR226-2432 mw|Wiv T"i ~r f ZIPFEL 08/06/93 08;1g AM To: RAM SEY, EICHSTTL cc: PLAYTIS , KENNEDY A T A1 A T H S K V A X , RITCHERL AT 1SCDCVM2 , ALLENJB A T A1 A T WMVX , STEWART Subject: C-8 in site drinking water The attached communication puts some perspective on the recent results of C-8 in our site's drinking water.

HAZLETON la bo ra to ries AMERCA. sic. 3301 KINSMAN BLVO..

BACK TO MAIN SUMMARY OF ANALYTICAL RESULTS: MULTI-CITY FOOD STUDY The Multi-City Study was originally designed by Battelle Memorial Institute (Columbus, OH), to obtain preliminary data about the presence of fluorochemicals in foods and in drinking water to understand the potential sources of human exposure.

r AR226-1404 Tl CC: POLYMERS OCCUPATIONAL H E A L T H COPY LIST A R A R G - IH-0 / f JUNE II, 1991 TO: POLYMERS OCCUPATIONAL HEALTH SITE CONTACTS FROM: / Ut V)AjMY<1tS.nULB3E*RGAELs - ACCEPTABLE EXPOSURE LIMITS The following changes were made in the AEL list at the June meeting.

* -1 * 0 0 3 -A A E V . 3-77 E.

Attachment 2 * 77& Analytical Report Air Sampling Fluorochemical Report DuPont Washington Works - Air Sampling Program Round 9 Exygen Research Report No.

P M226-/93S Proven Results. i \ m Analytical Report itf 3M Company Analysis o f PFOA and PFOS in W ater Samples from O akdale M unicipality E05-0074 m Exygen Report No.

* r AR226-2445 ZIPFEL 5 08 /04/97 03:51 PM To: WEBERDA , ELLISDE A T A1 AT CSOC cc: STEWART , HARTTEAS A T A1 AT CSOC Subject: RE: C-8 BIOFATE PROGRAM - WELL SAMPLING Dan, this needs to be discussed with Dave Ellis before we alter from our current program.

AR226-2624 RECYCLED AR226-2624 JULY 2004 PFOA SAMPLING DUPONT CIRCLEVILLE WORKS CIRCLEVILLE, OHIO Date: August 2004 Project No.: 18984003.04005 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 July 2004 PFOA Sampling Introduction On July 8,2004, groundwater was sampled from two recovery wells and three production wells at the DuPont Circleville Plant.

RECYCLED AR226-2647 \ \ GO \ Z-47 REV 6-82 T * B l.lR rl t> 1803 E.

AR226-2689 11 AR226-2689 ABCTelomer Research Program O A lK m Ciariant 8-2 Telomer B Alcohol Biodegradation Research Scone and Rationale The Telomer Research Program (TRP) 1 is investigating the biodegradation potential and pathway(s) o f 8-2 Telomer B Alcohol (CsF17CH2CH2OH; CAS #678-39-7), a primary fluorotelomer intermediate.

AR226-2744 E.

FOR DU FONT USE ONLY AR226-2779 E.