AR226-2573 COMPILATION OF HISTORICAL C-8 DATA DUPONT WASHINGTON WORKS MAIN PLANT AND LANDFILLS Date; January 2002 Project No: D6WW7423 h ^ CORPORATE REMEOIAT10N GROUP An Alliance between DuPOnt and URS Diamond Bailey MM SHOta, Building 27 Wilmingtwi, Dtttwait 196G5 JS0015042 EID620777 TABLE OF CONTENTS 1.0 Introduction............,....,.......................,...............--.......................................... 1-1 1.1 Document Organization.......................................................................... 1-1 1.2 C-8 Historical Laboratory Analysis........................................................... 1-1 1.3 Physicochemical Data for Animonium Perfluorooctanoate (C-8)................ 1-2 1.4 References................................................................................................. 1-2 2,0 Washington Worta Main Plant ...........................,...........................................,.,.....2-1 2.1 Introduction..,..,.....,............................-..--......,..........................................2-2 2.2 Environmental Setting...,....................................,...,.,.,.,....,,...........,...............2-3 2.2.1 Geology............,..,.,.,.,...................................,..,,..,............................2-3 2.2.2 Hydrology, Hydrogeology and Groundwater Flow..........,..,............2-3 2.3 Water Quality ..................................,..............................................................2-6 2.3.1 Surface Water Quality .....,..,.,.,................................................,,.......2-6 2.3.2 Groundwater Quality .......,,..,.........,.............................................,..,,2-6 2.3.3 Drinldng/Tap Water Quality .................,.,...,..,.,-.,....,.......................2-7 2.4 Site Conceptual Model ..,................................................................................2-7 2.5 DataGaps........-,.,...,....,...........................................,..-,...........,..................2-8 2.6 References..................................................--..................,..,...-,,,....,...............2-8 3.0 Local ]LandfiU....................................-.....,,,...,...........................:.................,..........3-l 3.1 Introduction ,......,...........................................-,......,........................................3-2 3.2 Eilvir&mnentalSetting.......,..,............,.................................,..........................3-2 3.2.1 3.2.2 Geology.................,,....................................,...,.,....,......,,......,........,..3-2 Hydrology, Hydrogeology and Groundwater Flow..........................3-3 3.3 Water Qualiy....,.................................................,..,.,.......,.............................3-4 3.3.1 Surface Water Quality ......................................................................3-4 3.3.2 Groundwater Quality .....................................,......,....,......,...............3-4 3.4 Site Conceptual Model...................,..,...,,..,....................................................3-5 3.5 DataGaps..........................................,........,.................................................-.3-6 3.6 References ....,..,..........,...,........1......................,..,.,.,,..,..........,.........................3-6 4.0 Letart Landfill........................... ,.................,......,.....................................,.............,4-1 4.1 Introduction ......-...............-..............,,.......,,.........................;..................,,,,,,,, 4-2 4.2 Environmental Settmg.........................................,..,......................................,4-2 4.2.1 Geology.........................................,,..................................................4-2 4.2.2 Hydrology, Hydrogeology and Grovndwater Flow..........................4-3 4.3 Water Quality ...,.........................................,...................................................4-4 4.3.1 Surface Water Quality ..............................,..........,............................4-4 4.3.2 Groundwater Quality.......................................,.,..............,...............4-5 4.4 Site Conceptual Model........................ ,..........................................................4-6 4.5 DataGaps.....,-................-.........-...,,,..................................-.....................,.4-7 4.6 References.............................;.......,.....,.,.................................................,......4-8 JS0015043 EID620778 Main Plant and Landfills Table of Contents 5.0 Dry Run Landfill .......................................................................................... ..5-1 5.1 Introduction........-....,...........--................................,...,............."......--....-- ..5-2 5.2 Environmental Setting........................................................,,,,..,,,,,,,,.,,........ ..5-2 5.2.1 5-2.2 Geology.......................................................................................... ..5-2 Hydrology, Hydrogeology and Groundwater Flow,.,....,....,,......... ..5,3 5.3 Water Quality................................................................................ ..5-4 5.3.1 Surface Water Quality ............................................................. ..5-4 5.3.2 Groundwater Quality ................................................................ ..5-4 5.4 Site Conceptual Model................................................................................ ..5-5 5.5 Data Gaps.................................................................................................. ,.5-6 5.6 References.......... ...........................,,...,,...,,.,,...--........................................ ,.5*6 TABLES Table 2.0 Table 2.1 A Table 2.1 B Table 2.1 C Table 3.0 Table 3.1A Table 3,1 B Table 4.0 Table 4.1 A Table 4.1 B Table 5.0 Table 5.1 A Table 5.1B Washington Works Main Plant Monitoring Wells Construction Data Washington Works Main Plant Analytical Data Table - Surface Water Washington Works Main Plant Analytical Data Table - Groundwater Washington Works Main Plant Analytical Data Table - Drinking Water Local Landfill Monitoring Wells Construction Data Local Landfill Analytical Data Tables - Surface Water Local Landfill Analytical Data Tables - Groundwater Letart Landfill Monitoring Wells Construction Data Letart LaodFdl Analytical Data Tables - Surface Water Letart Landfill Analytical Data Tables - Groundwater Dry Run Landfill Monitoring Wells Construction Data Dry Run Landfill Analytical Data Tables - Surface Water Dry Run Landfill Analytical Data Tables - Groundwater Figure 1.0 Figure 2.0 Figure 2.1 Figure 2.2 Figure 2.3 Figure 2.4A Figure 2.4B Figure 2.4C Figure 2.4D FIGURES Solubilities of CyF^ COOM in Water as a Function of Temperature Washington Works Main Plant Location and SWMU Map Washington Works Main Plant and Local Landfill 1-mile Radius Map Washington Works Main Plant Monitoring Well and Surface Water Sample Location Map Washington Works Main Plant Cross Section Location Map Washington Works Main Plant Cross Section A-A' Washington Works Main Plant Cross Section B-B' Washington Works Main Plant Cross Section C-C' Washington Works Main Plant Cross Section D-D' Compilation of hittBiy dale Draft 2rev.doc Mar. 11,02 Wilmtngton.

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Summary PFOS Rat Cross-Fostering StudyNumbers:3M T-6295.13,Argus418-014 Compound & Lot: PFOS (Perfluorooctanesulfona-teL)ot 217,98.4% pure(SMD AnalyticalRequest 53030) C.A.S.

PFOS: A D DIETARY ACUTE MALLARD DUCK STUDY TEST SUBSTANCE Identity:Perfluorooctanesulfonatmea;y alsobe referredto as PFOS or FC-95.

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3M SpecialtyMaterials 3M Center St.Paul,MN 55144-IOOQ_-:651733 1100 3M June 28,2000 FecEx, 18077182 FadEx Tracking Number for Customer VIA EXPRESS MAIL Dr.CharlesAuer Director Chemical ControlDivision OfficeOf PollutioPnreventionAnd Toxics UnitedStatesEnvironmentalProtectioAngency 401 M Street,Southwest Room 403 EastTower (MailCode 7405) Washington,D.

ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE Identity:Mixturecontainingperfluorooctanesulfonawtheich may also be referredto as PFOS, FC-95, or as a component of FC-201 F. (1-Octanesulfonicacid,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-p,otassium salt,CAS # 2795-39-3) Remarks: The 3M productionlotnumber was 1.

ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST ellm'zTAK'rl= ldenfity:Mixturecontainingperfluorooctanesulfonawtheich may alsobe referredto as PFOS, FC-95, oras a component ofFC-3003. (1Octanesulfonicacid)(CAS # 2795-39-3).