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PFOA Distribution - June 2006 = ND = 0.2 - 0.9 ug/L = 1-1. 9 ug/L = 2- 5. 9 ug/L = 6-9. 9 ug/L >10 ug/L O Private well Li City weil Monitoring we -fa Surface water I I no results yet PFOS Distribution - June 2006 jilt PFOS Concentrations = ND O Private well = 0.2 - 0.9 ug/L C- City well = 1-1.9 ug/L Monitoring we = 2- 5. 9 ug/L = 6- 9. 9 ug/L | > 10 ug/L no results yet &m.

NORTHERN KENTUCKY OFFICE SUITE 340 1717 DIXIE HIGHWAY COVINGTON, KENTUCKY 41011-4704 606-331-2838 513-381-2838 FAX: 513-381-6613 DAYTON, OHIO OFFICE SUITE 900 110 NORTH MAIN STREET DAYTON, OHIO 45402-1786 937-228-2838 FAX: 937-228-2816 R o b e r t a .

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E~N NVVII RROONN Introduction Introduction TiTnhhciilssuwdwioonrrgkkshshheeeeeqltuaccnootnnitftaaiicinnasstiaonbboiifocaatcchcceuupmmruoulpaloalrtltiooinonnmmooofddeeexllp1too0supprrreedediccetrithhveeedccfooinnoccmeennstturraafttiaoocnne osofefdPPiFFmOeOnSSt iivneffriissshuhsitishssseuuee,, water column. including the quantification water column.

Medical Center NEBRASKA'S HEALTH SCIENCE CENTER June 18, 2004 PATHOLOGY AND MICROBIOLOGY John L.

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

NORTHERN KENTUCKY OFFICE SUITE 340 1717 DIXIE HIGHWAY COVINGTON, KENTUCKY 41011-4704 606-331-2838 513-381-2838 FAX: 513-381-6613 DAYTON, OHIO OFFICE SUITE 900 110 NORTH MAIN STREET DAYTON, OHIO 45402-1786 937-228-2838 FAX: 937-228-2816 Ro b e r t a .

TestResults AR226-2125 file:///C|/WINDOWS/TEMP/Monomers C-8 2-26-73 to n 8-5-81 9 pages.htm J TestResults Sam ple Dat Range C oncentration Range A ctio n Level Industrial Hygiene 2/26/73 100% 8/5/81 Sample D t Sample # D uration Type Employe Name Pers BTO : 08 TEFLON LOC : 016 MONOMER ANALYZER COMPUTER ROOM 11/15/79 61389 z 11/26/79 61390 z 11/29/79 61391 z C hem ical Cone U nit Percent C-8 0.0006 PPM 0.0% 0 8 0.0003 PPM 0.0% 0 8 0.0004 PPM 0.0% BTO : 08 TEFLON zLOC : 023 TRAINING FACILITY (OLD PROD C.C.) 3/3/81 54817 3/3/81 54818 'z 3/16/81 54819 3/17/81 54820 3/18/81 54821 3/18/81 54822 3/19/81 54823 3/19/81 54B24 z z 2 z z z 3/27/81 54825 z lo f 16 BTO : 08 TEFLON LO C : 701 FINE POWDER DRYER-EAST SIDE #2 0 8 0.0004 PPM 0.0% 0 8 0.0005 PPM 0.0% 0-8 0.0002 PPM 0.0% 0 8 0.0008 PPM 0.0% C-8 0.0002 PPM 0.0% 0 8 <0.0001 PPM o.0% 0 8 0.0003 PPM 0.0% o.b%0 8 0.0004 PPM 0 8 <0.0001 PPM 0,0% 8/28/2001 4:41 PM E ID 129508 AJP007141 TestRssults Me:///C|/WINDOWS/TEMP/Monomers C-8 2-26-73 thru 8-5-81 9 pages,htra 2/26/73 62670 9/3/74 62671 2/3/77 62672 2/16/78 62673 2/12/79 62674 12/13/79 62675 12/31/80 62676 8/5/81 62677 8/5/81 82678 Z Z Z Z Z Z Z Z Z C-8 C-8 C-8 C-B C-8 C-8 C-8 C-8 C-8 <0.1 PPM 0.0% <0.1 PPM 0.0% <0.1 PPM 0.0% <0,1 PPM 0.0% <0.1 PPM 0.0% <0.0001 PPM 0.0% 0.0073 PPM 0.0% 0,0091 PPM 0.0% 0.0005 PPM 0.0% BTO: LOC : 08 TEFLON 702 FINE POWDER DRYER CONTROL ROOM (ALSO SEE TTF031 2/26/73 57136 Z C-8 9/3/74 57137 Z C-8 2/3/77 57138 Z C-8 Tuesday, August 28,2001 3:18:48 PM <0.1 PPM 0.0% <0.1 PPM 0.0% <0.1 PPM 0.0% Page 1 of 9 2 of 16 AJP0O7142 Sample Dt Sam ple # D uration 2/16/78 57139 Type Employee Name Z 2/12/79 57140 Z 11/28779 57141 z Pers Chemical C-8 C-8 C-8 Cone U nit Percent <0.1 PPM <0.1 PPM 0.0002 PPM 0.0% 0.0% 0.0% 8/28/2001 4:41 PM E ID 12 95 09 TestResults 1 11/29/79 57142 7/9/80 57143 7/14/80 57144 7/16/80 57146 8/28/80 57146 6/8/81 67147 6/13/81 57148 7/21/81 57149 7/23/81 57150 file-7//C|AVTNDOWS/TEMP/Monomers C-8 2-26-73 thru 8-5-819 pages&tm Z 0 8 0.0005 PPM 0.0% Z 0 4 0,0009 PPM 0.0% Z C-8 0.0022 PPM 0.0% Z C-8 0.0001 PPM 0.0% Z C-8 <0,0001 PPM 0.0% Z C-8 0.0004 PPM 0.0% Z C-8 0.0004 PPM 0.0% Z C-8 0.0002 PPM 0.0% Z C-8 0.0003 PPM 0.0% BTO: LOG: 08 703 TEFLON FINE POW DER PACKOUT ROOM 2/3/77 49590 Z 2/16/78 49591 Z 2/12/79 49592 Z 11/12/79 49593 Z 11/14/79 49594 Z 12/31/80 49595 Z 6/16/81 49596 Z BTO: LO G : 08 704 TEFLON A/S - FINE POWDER C-8 W EIGH HOOD 2/3/77 51169 Z 2/16/78 51170 Z 2/127/9 51171 Z C-8 <0.1 PPM 0.0% 0 4 <0.1 PPM 0.0% C 4 <0.1 PPM 0.0% C-8 0.0003 PPM 0.0% C-8 0.0001 PPM 0.0% C-8 <0.0001 PPM 0.0% C 4 <0.0001 PPM 0.0% C 4 <0.1 PPM 0.0% C 4 <0.1 PPM 0.0% C-8 <0.1 PPM 0.0% AJP007143 f 3 of 16 8/28/20014:41 PM E ID 129510 TestResults 12/3/79 61172 12/31/80 51173 file^/C|/WINDOWS/TEMP/Monomets C-8 2-26*73 thru 8-5-81 9 pages.htm Z C-B 0.0008 PPM 0.0% Z 0 8 0.0004 PPM 0.0% BTO : 08 TEFLON LOC : 705 DISPERSION PACK OUT AREA 1/16/80 60378 Z 1/17/80 60370 Z 3/31/80 60380 6/16/81 60381 Z z OS 0,0017 PPM 0.0% C-8 0,0002 PPM 0.0% C-8 <0.0001 PPM 0.0% C-8 0.0002 PPM 0.0% Tuesday, August 28,2001 3:18:48 PM Page 2 o f 0 ) 4 of 16 Sample Dt Sam ple # D uration Type Employee Name BTO ; 08 TEFLON LO C: 706 FINE POWDER DRYER #3 10/5/79 48575 Z 10/15/79' 48576 Z 10/17/79 48577 z 11/14/79 48578 z 12/13/79 48579 s 1/30/80 48580 2 4/29/80 48581 Z Pera Chemical Cono U nit Percent C-8 0.002 PPM 0.0% C 8 Q.0002 PPM 0.0% C-8 0.0044 PPM 0.0% C-B 0.004 PPM 0.0% C-B <0.0001 PPM 0,0% C-8 0.0065 PPM 0.0% C-8 0.029 PPM AJP007144 8/28/2001 ra E ID 129511 ' TestR'esults 4/29/80 46582 7/14/80 48583 7m m 48584 7/23/80 48585 7/29/B0 48586 7/29/80 48587 6/5/81 48588 6/5/81 48589 6/9/81 48590 6/9/81 48591 6/13/81 48592 file:///C|AVINDOWS/TEMP/Monomers C-8 2-26*73 thru 8-5-819 pages.htm 0-0% Z C-8 0.005 PPM 0.0% z C-8 0.0095 PPM 0.0% z C-8 0.0039 PPM 0.0% z C-8 0.0009 PPM 0.0% z C-8 0.0055 PPM 0.0% z C-8 0.0051 PPM 0.0% z C-8 0.0081 PPM 0.0% z C-8 0.0043 PPM 0.0% z 0 8 0.0015 PPM 0.0% z 0 8 0.0016 PPM 0.0% z C-8 0.0015 PPM 0.0% BTO : LOG : 08 707 TEFLON FINE POW DER DRYER #2 10/15/79 60137 2 10/17/79 60138 z 12/11/79 60139 s 12/11/79 60140 2 4/17/80 60141 z 4/17/80 60142 z 6/3/81 60143 z 6/3/81 60144 z 6/13/81 60145 z 0 8 0.0003 PPM 0.0% 0 8 0.0047 PPM 0,0% 0 8 0.0038 PPM 0,0% 0 8 0.0038 PPM 0.0% 0 8 0.0051 PPM 0.0% C-8 0,0035 PPM 0,0% 0 8 0.0946 PPM 0.0% 0 8 0.0061 PPM 0.0% 0 8 0.0014 PPM 0.0% A P 0 0 7 1 4 5 I 5 of 16 8/28/2001 4:41 PM E ID 129512 "TestR'esults 7/21/B1 80148 7/21/81 60147 7/22/01 60148 7/22/81 60149 file:///C|AVrNDOWS/TEMP/Monomers C-8 2-26-73 thru 8-5-81 9 pages.htm Z 0 8 0.0358 PPM 0.0% Z 0 8 0.0056 PPM 0.0% Z 0 8 0.0445 PPM 0.0% z 0 8 0.0058 PPM 0.0% BTO : 08 TEFLON LOC : 708 P/S - FINE POWDER PACKOUT (0BPJ) 10/17/79 49585 z Tuesday, August 28,2001 3:18:48 PM 0 8 <0.0001 PPM 0.0% Sample Dt Sample # D uration Type Employee Name 12/11/79 49586 Z 1/ 16/ao 49587 'z Pete Chemical C-8 C-8 Cone U nit Percent 0.0032 PPM 0.0006 PPM 0.0% 0.0% BTO : OB TEFLON LOC : 709 DRYER FLOATATION TANK 12/11/79 48867 z 0 8 0.0012 PPM 0.0% BTO : 08 TEFLON LOC : 710 FP&D AUTOCLAVE CONTROL ROOM 11/13/79 62583 z 11/15/79 62584 z 12/10/79 62585 z 12/13/79 62586 z 0 8 0.0006 PPM 0.0% 0 8 0.0007 PPM 0.0% 0 8 0.0004 PPM 0,0% 0 8 0.0001 PPM 0-0% AJP007146 6 of-16 8/28/20014:41 PM E ID 129513 TestKesults 1/25/80 62587 2/11/80 62688 2/26/80 62589 6/26/80 62590 7/14/80 62591 7/16/80 62592 7/31/80 62593 7/31/80 62594 8/4/80 62595 8/25/80 62596 1/8/81 62597 3/5/81 62598 6/13/81 62599 7/23/81 62600 file7//C|/WINDOWS/TEMP/MoEomets C-8 2-26-73 thm 8-5-819 pagesitm Z C-8 0,0012 PPM 0.0% Z C-8 0.0008 PPM 0,0% z C-8 0.0004 PPM 0.0% z 0 8 0.001 PPM 0.0% z 0 8 0.0024 PPM 0,0% z 0 8 <0.0001 PPM 0.0% z 0 8 0.0005 PPM 0.0% z 0 8 0.0009 PPM 0.0% z 0 8 0.0026 PPM 0.0% z C-8 .

* TestRsults ) , i AR226-2132 file:///C|AVINDOWS/TBMP/R]D C-8FC143 9-24-81 thru 7-19-01 6pages.htm 1 o f 12 Test Results Sam ple Data Range Concentration Range Action Level Industrial Hygiene 9/24/81 7/18/01 100% Sam ple Dt Sample # Duration Type Employee Name Pens BTO : 17 RESEARCH LOG : 019 WEIGH AND ADD C-8 TO POLYKETTLE 7/29/83 39740 411 Z 1/13/84 12116 409 P nono 8/17/84 12117 380 P none 4/30/85 12118 360 P none Chemical Cone Unit Percent C-8/FC-143 <0.03 MPB 5.4% C-8/FC-143 0.06 MPB 10.7% C-8/FC-143 0.34 MPB 60.7% C-8/FC-143 0.13 MPB 23.2% BTO: LOC : 17 RESEARCH 057 AROUND FLUOROCARBON EXTRUDERS 11/9/81 49895 2 C-8/FC-143 0.08 MPB 14.3% BTO: 17 RESEARCH LOC : 065 PPD SEMIWORKS 7/29/83 39741 410 Z C-B/FC-143 <0.03 MPB 5.4% AJP006929 BTO : LOC : 17 RESEARCH 066 FLUOROCARBON PANEL BOARD 10/14/83 39883 330 z 1/13/84 12224 414 P 6/21/84 12225 300 p 8/13/85 12362 380 p 8/13/85 12363 360 p norie none none none C-8/FC-143 0.03 MPB 5.4% C-8/FC-143 0.06 MPB 10.7% C-8/FC-143 <0.03 MPB 5.4% C-8/FC-143 0.055 MPB 9.8% C-B/FC-143 0.13 MPB 8/28/2001 5:09 PM EID 140171 TestResults 1/3/86 12370 1/3/86 12371 7/1/86 12383 7/1/86 12384 8/14/86 13212 8/14/86 13213 10/13/86 13279 10/13/86 13280 11/19/86 13348 11/19/86 13349 310 P 315 P 373 P 375 P 360 P 365 P 405 P 404 P 380 P 380 P file:///C|AVINDO'WS/TEMP/RD C-8 FC143 9-24-81 thru 7-19-01 OpagesAlm none none none none none none none none none none 23.2% 08/FC-143 <0.03 MPB 5.4% C-8/FC-143 0.07 MPB 12.5% C-8/FC-143 0.208 MPB 37.1% C-8/F0143 0.139 MPB 24.8% 06/FC-143 0.121 MPB 21.6% C-8/FC-143 0.577 MPB 103.0% 08/FC-143 0.458 MPB 81.8% 08/FC-143 0.09 MPB 16.1% C-8/FC-143 0.026 MPB 4.6% C-8/FC-143 0.204 MPB 36.4% Tuesday, August 28,2001 3:16:19 PM P an el of6 2 of 12 Sample Di Sam ple # Duration Type Employee Name BTO: 17 LOC: 068 RESEARCH SP AREA REFRIGERATION UNIT 1/27/97 25054 380 P Pars Chemical 08PM C-8/FC-143 Cone Unit Percent 0.1 MPB 17.9% .

1 ?

AR226-2610 SAMPLING INVESTIGATION RESULTS LITTLE HOCKING WATER ASSOCIATION WELL FIELD WASHINGTON COUNTY, OHIO Date; April 2003 Project No,: 7482 18983762.00010 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 1980S ASH025862 EID779150 ED779150 Sampling Investigation Rsulte Table of Contente TABLE OF CONTENTS Executive Summary................................. 1.0 Introduction........................ . .......... iii ......,,...1 2.0 Environmental Setting.................... 2.1 Geology............................ ...... 2.2 Hydrogeology........................ . .....3 ............ 3 4 3.0 Sampling Approach............................. .................. . ....5 4.0 Groundwater Sample Results........................... ............................... 4.1 C-8 in Groundwater from Temporary Borings...................... 4.2 C-8 in Groundwater from Production and Test W ells........... 4.3 Groundwater Elevations in Production and Test Wells and Ohio River Stage., ....6 ....6 ....6 ......8 5.0 Soil Sample Results.................................................... ....9 6.0 Site Conceptual Model........... .............................................. 6.1 Geology...................................... ............................ 6.2 Hydrogeology................................. ................ ............. 6.3 C-8 Transport Mechanisms and Migration Pathways. ..10 ..10 ..10 ,,11 7.0 Conclusions and Recommendations ..................................... .................. 13 8.0 References.............................................................................. .................. 15 Table 1 /Table 2 Table 3 Table 4 TABLES C-8 in Groundwater from Temporary Borings ' C-8 in Production and Test Wells Groundwater Elevation Data for Production and Test Wells August 21, 2002 C-8 in Soil from Temporary Borings L.HSIreportl Apf. 17.03 Wilmington, DE f ASB025863 EID779151 EID779151 Sampling Investigation Results Table of Contents Figure t Figure 2 Figure 3 Figure 4 Figures Figure 6 Figure 7 Figure 8 Figure?

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AR226-3164 DuPont-2925 TRADE SECRET Study Title H-24000: Biopersistence Screening 10-Dose Oral Gavage Study in Rats Laboratory Project ID: DuPont-2925 Author: Carol Finlay, B.A.

3M 3M General Offices QrtjM-M8il 3M Center St.