AR226-1539 ATTACHMENT 1 YEAR 2002 AIR DISPERSION MODELING ANALYSIS OF APFO EMISSIONS DuPont Washington Works Facility Parkersburg, West Virginia RECEIVED OPPT NCIC 2003 October 31 8:25AM Prepared by: DuPont Engineering Technology (DuET) Environmental Section Wilmington, DE 19898 October 17, 2003 Year 2002 Air Dispersion Modeling Analysis October 17, 2003 Page 2 1.

3M Specialty Materials March 13, 2002 3M Center St.

T-7132.1 FR DT15 Title: Comparative Molecular Biology o f Perfluorooctanesulfonamide (FOSA, T- 7132) in Rats following four consecutive days o f dosing.

AR226-2108 Industrial Hygiene Sample Date Range Concentration Range Action Level 1/1/81 100% 12/31/81 Sample Dt Sample# Duration Type Employee Name STO: m TECHNICAL LOC: 411 BLDG. 163 LAB GENERALAREA 9/11/81 48665 Z 9/22/B1 48666 Z 9/23/81 48657 Z 9/23/81 48668 9/25/81 48669 10/12/81 48660 Z Z Z 10/14/81 48661 Z 10/19/81 48662 12/1/81 48663 12/1/81 48664 Z z z Pera Chemical C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 BTO: OB LOC: 7D1 TEFLON FINE POWDER DRYER-EASTSIDE #2 7/30/81 62679 Z 7/30/81 62680 z 9/26/81 62681 z 10/9/81 62682 z 10/9/81 62683 z 10/9/81 62684 z 10/20/81 62685 z 10/20/81 62686 z 10/20/81 62687 z 10/27/81 62688 z 10/28/81 62689 z 10/28/81 62690 z 10/30/81 62681 z 10/31/81 62692 z 10/31/81 62693 z 11/1/81 62694 z 11/4/81 62695 z 11/4/81 62696 z 11/4/81 62697 z Tuesday, January 16,2001 11:47:40 AM C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-6/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 Cone Unit Percent 0.15 MPB 0.06 MPB <0.03 MPB 0.03 MPB 0.03 MPB 0.04 MPB 0.1 MPB 0.14 MPB 0.03 MPB 0.03 MPB 26.8% 10.7% 5.4% 5.4% 5.4% 7.1% 17.9% 25.0% 5.4% 5.4% 096 MPB 1.18 MPB 2S3 MPB 0.67 MPB 0.36 MPB 0.68 MPB 4.31 MPB 1,48 MPB 1.13 MPB 0.69 MPB 0.27 MPB 0.1B MPB 1.91 MPB 2.91 MPB 1.25 MPB 0.31 MPB 0.69 MPB 0.31 MPB 0.41 MPB 171.4%** 210.7%** 461.8%** 119.6%** 64.3% 121.4%** 769.6%** 264/3%** 201.8%** 123.2% ** 48.2% 32.1% 341.1%** 519.6%** 223.2%** 55.4% 123.2%** 55.4% 73.2% Page 1 of3l AJP004045 E ID 1 1 3 1 8 0 Sample Dt Sample# Duration Type Employee Name 11/11/81 62688 11/13/81 62609 11/16/81 62700 11/16/31 62701 11/19/81 62702 11/20/81 62703 11/20/81 62704 12/9/81 62705 12/9/81 62706 12/9/81 62707 12/20/81 62708 12/22/81 62709 12/28/81 62710 12/29/81 62711 Z z z z z z z z z z z z z Z Fere Chemical C-8/FC-143 C-8/FC-143 C-8/FC-143 C-S/FC-143 C-S/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-B/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 C-8/FC-143 BTO: 08 TEFLON LOG: 702 FINEPOWDER DRYER CONTROL ROOM (ALSO SEETTF031 9/21/81 57258 z C-B/FC-143 9/23/81 57259 z C-8/FC-143 9/24/81 57260 z C-8/FC-143 9/27/81 57261 z C-B/FC-143 9/27/81 57262 z \ C-S/FC-143 9/30/81 57263 z C-8/FC-143 9/30/81 57264 z C-8/FC-143 9/30(81 57265 z C-8/FC-143 10/19/81 57266 z C-8/FC-143 11/9/81 57267 z C-8/FC-143 11/9/81 57268 z CB/FC-143 11/9/81 57269 z C-S/FC-143 11/11/81 57270 z C-S/FC-143 11/12/81 57271 z C-B/FC-143 11/12/81 57272 z C-S/FC-143 11/12/81 57273 11/18/81 57274 z z C-S/FC-143 C-S/FC-143 11/18/81 57275 z C-8/FC-143 11/16/81 57276 z C-8/FC-143 11/19/81 57277 z C-S/FC-143 12/2/81 57278 z C-8/FC-143 12/14/81 57279 z C-S/FC-143 Tuesday, January 16,2001 11:47:40 AM Cone unit 0.77 MPB 3.18 MPB 0.87 MPB 0.93 MPB 1.06 MPB 4.54 MPB 3.93 MPB 216 MPB 1.02 MPB 1.21 MPB 2.69 MPB 1.42 MPB 0.55 MPB 3.05 MPB percent 137.5%** 567.9%** 1732%** 166.1%** 189.3%** 810.7%** 701.8%** 385.7%** 1821%** 216.1%** 480.4%** 253.6%** 90.2% 544.6%** 0.12 MPB 1.64 MPB 1,04 MPB 4.6 MPB 0.47 MPB 0.46 MPB 1.00 MPB 0.46 MPB 0.13 MPB 0.7 MPB 0.06 MPB 054 MPB 3.01 MPB 0.68 MPB 0.57 MPB 0.52 MPB 0.65 MPB 1.33 MPB 1.18 MPB 0.07 MPB 0.12 MPB 024 MPB 21.4% 292.9%** 185.7% ** 821.4%** 83.9% 821% 183.9%** 821% 232% 125.0%** 100.0%** 96.4% 537.5% " 117.9%** 101.8%** 92.9% 116.1%** .237.5%** 210.7%** 125% 21.4% 429% Page 2 of31 AJP04046 E I D l13181 Sam ple D t Sam p le# Duration Type Em ployee Nam e 12/21/81 57280 12/21/31 67281 12/21/81 57282 12/22/81 57283 12/28/81 57284 Z Z Z Z Z BTO : 08 l,OC: 703 TEFLON FINE POWDER PACKOUT ROOM 8/25/31 31236 P 922/81 49740 Z 10/2/81 49741 Z BTO: OB TEFLON LOC : 704 A/S-FINE POWDER C-8 WEIGH HOOD 12/3/81 51474 Z 12/14/81 51475 Z 12/28/81 51476 Z.

TestResults AR226-2119 fite:///C|/WIND0WS/TEMP/C-8 Z 2-26-73 thim8-12-81.htm TestResults Sam ple Date Range C oncentration Range A ction Level Industrial Hygiene 2/26/73 100% 8/12/81 Sample Dt Sample # D uration Type Employee Name Fera BTO : LOC : 04 POWER & SERVICES 074 INCINERATOR AREA - GENERAL 4/15/81 52165 Z 4/20/81 52166 Z 4/20/81 52167 Z C hem ical Cone U nit Percent C-8 0.0005 PPM 0.0% C-8 0.0011 PPM 0.0% C-8 0.0002 PPM 0.0% BTO : LOC : 07 TECHNICAL 406 TFE-FEP-MELT INDEXER-ON BENCH 10/23/80 57333 Z 10/28/80 57334 Z 10/31/80 57335 Z C-8 <0.0001 PPM 0.0% C-B 0.0011 PPM 0.0% C-8 0.0008 PPM 0.0% BTO : LOC : 07 TECHNICAL 411 BLDG. 163 - LAB GENERAL AREA 4/10/81 47508 Z C-8 <0.0001 PPM 0.0% A3P006235 BTO ; LOC : 07 TECHNICAL 435 BLDG 212-CHECK VISUAL CONTAMINATION CUBES 2/25/81 60866 Z C-8 0.0003 PPM 0.0% BTO : LOC : 07 TECHNICAL 436 BLDG 212-FEP-MELT INDEXER-ON BENCH 2/25/81 52683 Z lo f 51 C-8 O.OCi 5 PPM 0.0% 8/9/2001 3:52 PM E ID 139477 TestResults file:///C|/WIND0WS/TEMP/C-8 Z 2-26-73 thru 8-12-81.htm 2/25/81 52684.

AR226-2310 Charles J Zarzecki 03/13/2003 11:02 AM To: Catherine A Barton/AE/DuPont cc: Subject: Re: Our stance on actual sampling Q C a th ie , Actual sampling w ill show low er numbers.

Relevance of Soil Sampling in Site Screening Level Assessments for PFOA October 22,2003 AR226-2347 I Discussion Topics Review soil sampling key learning's Present site screening level assessment conceptual model g O to 0> Ul H EXP015812 Messages For Today | Soil sampling is not critical to site screening level assessments designed to evaluate | overall human and environmental exposure at a PFOA use facility. * Water monitoring should focus on site boundaries, key discharge points, or where wg potential exposure is occurring. 0 tO a<01\ to EXP015813 PFOA P/C Characteristics PFOA displays high water solubility - 1000 mg/L (Kissa, 1994) - >10% (3M, 2001) PFOA displays low adsorption capacity in all soil types (3M & APME Studies) - Similar to other highly mobile chemicals (see Koc chart) s SB oNJ m 'j w u EXP015814 Koc Comparison Comparison of Koc's for PFOA and Other Chemicals Napthalene --------------- C ap e F ear (A P M E , 2003) Drum m er (A P M E , 2003) -- 4 Hidalgo (A P M E , 2 0 0 3 ) 4 -------4 Keyport (A P M E , 2 00 3) 4--,4 Wilmington Sludge (A P M E , 2003) S Methylene Chloride O IO A Brill Sandy Loam (3M , 1978) _________ , _______ ,-------------------------- - c\ si I 0 200 400 600 800 1000 1200 Koc (mL/g) EXP015815 Soil Sampling Key Learning's I Our extensive soil sampling database from Washington Works shows: --Overall low concentrations, won't build-up --Air deposited PFOA readily dissolves and migrates via water movement (sw/gw) Most surface soils <50 ug/kg --All results significantly below CATT screening level of 240,000 ug/kg o N at -d Ul U1 EXP015816 Site Screening Level Assessment Conceptual Model Ba 0 to 0) U1 01 EXP015817 PFOA Site Screening Level Assessment Conceptual Model - Compiled using extensive modeling and monitoring conducted at Washington Works - Considers realistic potential exposure points to focus screening level assessment monitoring Facility water discharges Groundwater at site or discharge boundaries I - Soil is not a key monitoring point o N Ul sj EXP015818 SCREENING LEVEL ASSESSMENT MODEL AIR EMISSIONS t= > <==5, % AQUEOUS DISCHARGE ^-r /~ * S W M U \ ttl UNSATURATED SOIL AQUEOUS DISCHARGE -- MX RIVER / l UNSATURATED SOIL yt y tv GROUNDWATER o POTENTIAL SCREENING LEVEL ASSESSMENT MONITORING POINTS M cn 0 FACILITY AQUEOUS DISCHARGE (OUTFALLS) ui oo (2 ) SURFACE WATER (RIVERS, PONDS, STREAMS ETC.)

AR226-2560 August 31, 2001 Mr.

AR226-3147 DuPont-3823 TRADE SECRET Study Title H-24335: Local Lymph Node Assay (LLNA) Laboratory Project ID: DuPont-3823 AUTHOR: Gregory S.

TRADE SECRET AR226-3179 DuPont-6818 S tudy Title H-24616: Static, Acute, 96-Hour Screening Test to Pimephales prom elas Laboratory Project ID: DuPont-6818 A u t h o r : Daniel J.

TRADE SECRET Study Title H-24761: Biopersistence Screening 10-Dose Oral Gavage Study in Rats Laboratory Project ED: DuPont-55^1 AR226-3190 DuPont-5591 A u t h o r : Carol Finlay, B .A .

AR226-3359 EVALUATION OF POTENTIAL ENVIRONMENTAL EXPOSURE FOR PERFLUORINATED 8-2 TELOMER B ALCOHOL ffOUNIVERSITAT ..OSNABRCK J.

AR226-3636 INTERIM REPORT #1 Analysis of Oakdale Water Samples STUDY TITLE Analysis of Perfluorooctanoic Acid (PFOA), Perfluorobutanesulfonate (PFBS), Perfluorohexanesulfonate (PFHS), and Perfluorooctanesulfonate (PFOS) in Water, Soil, Sediment, Fish, and Clams Using LC/MS/MS for the 3M Cottage Grove Monitoring Program DATA REQUIREMENTS EPA TSCA Good Laboratory Practice Standards 40 CFR 792 STUDY DIRECTOR Jaisimha Kesari P.E., DEE Weston Solutions, Inc. 1400 Weston Way West Chester, PA 19380 Phone: 610-701-3761 INTERIM REPORT COMPLETION DATE May 19, 2005 PERFORMING LABORATORY Exygen Research 3058 Research Drive State College, PA 16801 .

etty Boros-Russo - Fwd: TRANSM ITTAL - Parlin P&T System Remaining Data From: To: Date: Subject: Karen Fell Boros-Russo, Betty Mon, May 14, 2007 11:12 AM Fwd: T R A N S M IT T A L -- Parlin P&T System Remaining Data fyi > William B Robertson William.B.Robertson@USA.dupont.com> 5/14/2007 8:48 A M > Hi Karen, Attached to this m essage please find a transmittal of the remaining analytical data for the Parlin Pump and Treat system as requested in the N JD E P letter of April 2, 2007.

Jean B.