UNITED ADVANCE ENGLISH COP Y NATIONS P.

FTor:om: "BLeatutryaBoVraonschRo@uamswastear.s@tcaotdm>reusp SDuabtjee:ct: PWeFdO,ADec 26, 2007 10:A23 Hope you re enjoying tha holidays.

~ "( l`~ 3` _p( 1I ~ ~ "McCrea, Deborah" <mccrea@taftlaw .com> 08/13/2009 02 :41 PM To cc bcc Subject NCIC OPPT@EP,A "Bilott, Robert A."

Taft/ Taft Stettinius & Hollister LLP . 425 Walnut Street, Suite T800 /Cincinnati, OH 45202-3957 /Tel : 513 .381 .2838 /Fax : 513 .381 .0205 /www .taftlaw.com Cincinnati /Cleveland /Columbus /Dayton /Indianapolis /Northern Kentucky /Phoenix /Beijing ROBERT A.

AR226-1523 FINAL REPORT RECEIVED OPPT NClC 03 SEP 30 PM1:OO PROTOCOL 418-028 ORAL (GAVAGE) COMBINED REPEATED DOSE TOXICITY STUDY OF T-7706 WITH THE REPRODUCTION/DEVELOPMENTALTOXICITY SCREENING TEST SPONSOR'S STUDY NUMBER: T-7706.1 FINAL REPORT DATE: 3 1 JULY 2003 PROTOCOL 418-028 - ORAL (GAVAGE) COMBINED REPEATED DOSE TOXICITY STUDY OF T-7706 WITH THE REPRODUCTIONLDEVELOPMENTAL TOXICITY SCREENINGTEST SPONSOR'S STUDY NUMBER: T-7706.1 TABLE OF CONTENTS SUBJECT 1.

Toxicological Summary PFOS Dietary Chronic Definitive Reproductive Study: Mallard Test Substance: Perfluorooctanesulfonate (PFOS) Structure: 1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro, potassium salt.

Hollyhouse Inc.

- ADIETARYLCS0STUDYWIrToHTsHENORTHERN BOBWHITE WILDLIFE INMTELRANABTRIEOQNUAELSLTTDN,o.PRO0J2E7C23T NO 454.103 S5r U0S.

AR226-1880 Overview of APFO/Telomer Active DuPont/DuPont-Sponsored Projects Presented to US EPA Robert W.

AR226-2112 Test Results Sample Date Range Concentration Range Action Level - n < - ' g----CT'g In =;-TC d W3-;i u s t r i eJ :;ry;nTip;'-ra-j<j,,-jt ; ';=t.S-CT,-.-'----- -:----- -:-- JHygie ; -,- : - ne - - ----' 1/1/84 12/31/84 100% Sample Dt Sample Duration Type Employee Name BTO: 08 LOG; 701 TEFLON FINE POWDER DRYER--EAST SIDE (K 11QB4 46247 3SO Z 1/13HB4 46248 380 Z 3/11/84 46240 3SO Z 4/10/84 46250 398 Z 5f7/84 48251 390 Z 6084 46252 7/284 46233 380 Z 360 2 7/30/B4 46254 360 2 8C484 4625S 330 Z 9H23(B4 46256 420 Z 10(21/84 46257 3GO Z 12/17/S4 46258 370 Z Pers Chemical C-8/FC-143 C-6/FC-143 Cfl/FC-143 C</FC-143 <>a/FC-143 C-8/PC-143 C-WG-143 C-8ffC-143 08/FC.143 (>8/FC-143 C4/FC-143 08/PC-143 Cone Unit Percent 82 MPB 0.19 MP8 0.31 MPB 0.21 MPB 0.47 MPB 0.29 MPB <0.08 MPB 03B MPB OJ53 MPB 0.02 MPB 036 MPB 039 MPB 146425%* 33.6% 55.4% 375% 83S% 51.8% 5.4% 50j0% 94.6% 110.7%** 43% 69,6% BTO: 06 TEFLON U3C; 702 FINE POWDER DRYER CONTROL ROOM (ALSO SEE TTF031 1/23(84 36566 345 Z C-8/FC-143 1/27/S4 36567 420 Z C.8/FC-143 2/20(84 36568 3/17/84 36668 360 Z 360 Z 0-8^0.143 C-fl/FC-143 6/12<B4 36670 385 Z C-e/PC-143 7/8184 36571 340 Z C-8/PC-143 8/4(84 36572 420 Z Ofi/FC-143 10/2/B4 36573 360 Z C^/PC-143 11/24(84 36574 390 Z C-e/FC-143 1203(84 3S5?

SITE SCREENING LEVEL ASSESSMENTS FOR PFOA AND THE RELEVANCE OF SOIL SAMPLING Date: OctobertO, 2003 Project No,; 18983753.00034 ^ CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 EXP001453 SHe Screera'ng Level Assessments for PFOA and the Relevance of Soa Sampling Table of Contents TABLE OF CONTENTS Executive Summary. 1.0 Introduction ..... 2.0 Data Presentation................................................................................................ 2.1 Development of a Generalized PFOA Screening Level Site Conceptual Model...............,................................................................................................3 2.2 Laboratory Studies of PFOA and Field Sample Verification........................... 4 2.2.1 The Behavior of PFOA in Water......................................................... 5 2.2.2 Adsorption/Desorption of Ammonium Perfluorooctanoate to 2.2.3 2.2.4 Soil.......................................................................................................5 Little Hocking Water Association Investigation Results..................... 7 Washington Works RFI Soil Sampling Results................................... 8 3.0 Summary... .10 4.0 References. .11 Table I 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 of 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 Site Screening Level Assessments for PTOA and the Relevance of SoB Sampling _____EXCCUtlVe Summary EXECUTIVE SUMMARY DuPont's extensive implementation of 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 of a generalized screening level assessment model.

AR226-2567 1 N OF To; From; TE R PICE MEMO Mr.

ACUTE TOXICITY TO AQUATIC INVERTEBRATES (COROPHIUM VOLUTATOR) TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may alsobe referredtoas PFOS, FC-95, oras a component ofFC-602. (1Octanesulfoniaccid)(CAS # 2795-39-3).

Columbus Childrens Hospital P. 1 Page 1 of I ..

p. 1 Ae- zZ~-37"7 ACUTE TOXICITY TO THE OLIGOCHAETE WORM (Lumbriculus variegatus) TEST SUBSTANC E Identity : Perfluorooctanesulfonate ; may also be referred to as PFOS or FC-95 . (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3 ) Remarks : The test substance is a white powder .