STANDARDS a ad Sl (PFOA) Tae Fay Se Products. 2afTQ H TMTDeR e perfluoroctancicacid, NA 9635 DuPont.

StZ y WIN en Fed o> wad FP & ey ma ' 000219 ' USEPA10338 J =0 OFF SITE sampling 33//1123//8887 1S1//727//8889 33//2235//9311 8/8/91 HRA LUPUSBDECKHOMBEUSTIANPESS-pTap (2) LPPSSDD HHOOMMEE TTAAPP ----pp ULPPSSDD LPSD HHOOMMEE HOME TTAAPP Tap ---Cm kkAk 33//1133//8877 3/12/88 VLIIETNTLNEA LITTLE HHOOCMKEINTGAPBUSINESS HOCKING HOME TAP -TRap ERE kkk 11/28/90 LUBECK PRIVATE WELLS OTLEY RRR8/ 9k /91 kLUBECKkPRbIVATE WELLS (2) ~42 6/23/91 NEW LUBECK WELL (*) CHZMHILL CONFIRMED *PRESENCE OF c-g C-9pry 12..92, 1ls 0i.l7a a33l.ls8e 00..66 0.6 <0.6,0.6 <1.0,c1.0 2.4 (0) SA RRO # AT.ACHMENT 4 MIKE MCCKLUSKY 2-8 Men EXPOSURE Tours TW (3) 4aa3 100 AEL (DUPONT) 10 CEG (ATR, WATER) HASKELL ESTABLISHED: _8_ uG C-8 PER 24 HOURS 80% BY AIR ....... 6.4 uG/ 20=M 0.3 32 OR 02.3 uamM3 20% BY WATER ..... 1.6 uG/ = 0 ~% 2 L = 0.80 OR 1_ PPB QUTSIDE CONTRACT LAB: CH2MHILL $231 AUTH TO PROVIDE 0.1 PPB C-8 IN WATER ANALYSIS 000221 - USEPA 10330 / ATTACHMENT S TERRY VANDELL 1.HYDROGEOLOGY : S6A5N-D100& LUBECK WFEGTLRLADFVEIEELLPE:D,AQOUF1IF5F--ES6RI5,TEFTOANT-DESEINDoTt,Ee WRYIEISLE.LLSDDSEVEODFLROIPSLEELDVEEDR_@ALVSIEHAUVNEDRCRAAELBDLEHGUBNMDF.oRoErD.

ORIGINAL December 29, 2009 or. r ' r i u -uiL n o n r r d n ^*4 W J W LW L J J if J 33 DuPont Haskell Global Centers for Health and Environmental Sciences 1090 Elkton Road, P.O.

ORIGINAL DOES NOT CONTAIN CBI 3 3 2 .5 ^ DuPont Haskell Global Centers for Health and Environmental Sciences 1090 Elkton Road, P.O.

ORIGINAL DOCS NOT CONTAIN CBI 3 S 8 \\3 3 July 15, 2010 i- OJUL 19 fft`jM'1 09 DuPont Haskell Global Centers for Health and Environmental Sciences 1090 Elkton Road, P.O.

The internal standards used were a dual labeled PFOS where two '*0 molecules were included in the sulfonate group (intemal standard, >99% purity, synthesized by Research Triangle Institute, Research Triangle Park, NC) and a dual labeled PFOA molecule, where the carboxyl and alpha carbons were labeled with '*C stable isotope (greater than 97%, provided by DuPont, Wilmington, DE).

There are worldwide five major chemical manufacturers, namely DuPont ((FUrSaAn)c,e),AswahhiichanpdrodDuacineippeprofnluo(rJoaaplakny)l, chCelamriicaanlt r(aGwermmaatenryi)alsanvdia AtthoecThFeEm Telomerization process.

Jepson The DuPont Company, Haskell Laboratory/or Health and Environmental Sciences, Newark, Delaware, USA fllfAbstract ^Results -- Singe Exposure Phannacokinetics f Results -- R A large pharmacokinetic database exists describing ^r behavior ofpcrfluorooclanoic acid (PFQA) following oral otposure.

% DuPont Modeling Methodology and Results D ebbie M ulrooney D uPont E ngineering T e c h n o lo g y A pril 2 4 , 2 0 0 2 AR226-2279 Modeling Methodology EPA's Industrial Source Complex 3 (ISC3) Model i Followed procedures In EPA's Guideline on Air Quality Models (Appendix W) BPIP model to evaluate building downwash effects CtisfJ Terrain elevations imported from USGS electronic file Receptor grid with 100-meter spacing 5n-site met data (1996) 2-fi>r J.Y fi't/J - quip W- Modeling Inputs a?.

AR226-2655 AR226-2655 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 the form R13 permits (815E, 1353B, 1953B, and 2365C) comply with the C-8 assessment o f toxicity (CAT) recommended airborne screening level of 1.0 ug/m3 at the property line fence.

The internal standards used were adual labeled PFOS where two *0 molecules were included in the sulfonate group (internal standard, >99% purity, synthesized by Research Triangle Institute, Research Triangle Park, NC) and a dual labeled PFOA molecule, where the carboxyl and alpha carbons were labeled with C stable isotope (greater than 97%, provided by DuPont, Wilmington, DE).

ORIGmi DOCS NOT CONTAIN CBI July 20, 2010 Via Federal Express pf'p I0 JL2 OE W - h h DuPont Haskell Global Centers for Health and Environmental Sciences 1090 Elkton Road, P.O.

ORIGINAL DOCS NOT CONTAIN CBI H # 3 5 0 977 DuPont Haskell Global Centers for Health and Environmental Sciences 1090 Elkton Road, P.O.

Please send me all documents related to physical, telephone or video communications and meetings (including diary entries, notes, minutes, correspondence produced before and after the communications and meetings) between DEFRA and the Environment Agency (including the secretary of state, ministers, under secretaries, and senior officials, chair, ceo) and the organisations listed below: AGC F2 Koura Dupont 3M Chemours Honeywell Solvay National trade associations and groups: Chemical Industries Association, British Coatings Federation, European Fluorocarbons Technical Committee / Cefic Sector Group, Plastics Europe Reduce the timeframe the last 6 months of 2023.

AR226-3138 TRADE SECRET Study Title H-24256: Eye Irritation Test in Rabbits Laboratory Project ID: DuPont-3615 AUTHOR: Deborah A.