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AR226-2006 INTEROFFICE MEMORANDUM Date; From; Depts Tel No; 14-Mar-1983 l0:34om Hiiliarn A.

TesfReaflts file:///C|WINDOWS/TEMP/Polymers C-8 7-24-78 <hru 1-3-98 23 pagesAtm lof43 AR226-2126 Test Results Sample Date Range Concentration Range Action Level Industrial Hygiene 7/24/78 1/3/98 100% Sample Dt Sample U Duration Type EroployBB (tone BTO; LOG: 18 TEFLON COPOLYMERS 001 FEP OVENS NORTH SIDE 12/18/79 47723 Z Pers 1/16/80 47724 Z 1/22/80 4772S Z 8/8/80 47726 Z Chemical Cone Unit Psrcotrt c-a 0.0005 PPM 0.0% G-8 0.0006 PPM 0.0% &8 0.0009 PPM 0.0% c-a 0.0095 PPM 0.0% BTO: LOC: 18 TEFLON COPOLYMERS 002 FEP OVENS SOUTH SIDE 12/19/79 47601 Z 1/25/80 47602 Z 08 0.0001 PPM 0.0% C-8 0.0031 PPM 0.0% 8TO: LOC: 18 TEFLON COPOLYMERS 003 #1 OVEN COOLING TOWER 2/S/81 54698 Z 2/11/81 54697 2 3/17/81 54688 Z 5/23/81 54699 Z 8/10/81 54700 2 8/11/81 54701 Z C-8 0.0001 PPM 0.0% C-8 <0.0001 PPM 0.0% C.8 0,0002 PPM 0.0% S C-8 <0.0001 PPM 0.0% C-8 0.0001 PPM 0.0% C-8 <0.0001 PPM 0.0% 8/28/20014:49 PM EID140183 TesfResults file:///C|/WINDOWS/TEMP/PolymeisC-8 7-24-78 fliru 1-3-98 23pages.htm 8/12/81 54702 BTO: LOG: 1B TEFLON COPOLYMERS 004 10.

x AR226-2139 I. cc: J.

AR226-2270 GIST MEETING March 5,2002 Dave Wafkins, chairperson, called the meeting to order at 9:15 am on March 5,2002.

AR226-2350 Ohio EPA December 2,2003 Objectives Provide grounding/update on recent activities Solicit input on upcoming activities Agenda Water - GIST Final Report Recommendations - Proposed MOU Based on GIST Recommendations - OEPA Requests - DuPont Suggested Modifications Air - Review Recent Model Results - Air Permit Update - Additional Reduction Programs - Air Model Verification Plan Proposed Memorandum of Understanding-West Virgini DEP and Ohio EPA Summary of Activities December 2, 2003 GIST Report Recommendations Summary Final GIST report issued August, 2003 Continued quarterly/annual monitoring of certain Ohio River public water systems Quarterly/annual monitoring of private water supplies (10 locations West Virginia and Ohio - West Virginia: Wash Works 0-2 mile radius and Dry Run Landfill/Letart Landfill 1-mile radius - Ohio: Wash Works 0-2 mile radius - List to include wells, springs, cisterns Conduct C8 monitoring at all DuPont Washington Works facilities according to applicable West Virginia Solid Waste/NPDES, NPDES and EPA HSWA (Corrective Action) permit requirements Proposed MOU -Administrative Details Parties: - West Virginia Department of Environmental Protection - West Virginia Department of Health and Human Resources - Ohio Environmental Protection Agency - E.I. du Pont de Nemours & Company Objectives: - Continued monitoring and reporting ofC8 concentrations in groundwater and surface water - Implement recommendations of me GIST concerning continu sampling and monitoring in WV & Ohio ("in and around the facilities") - Begin first quarter 2004 Proposed MOU -Public Water System Sampling WV Public Water Systems: - Quarterly sampling 1Q2004-4Q2005 atLubeckPS DuPont WW, and GE production wells and finished water (if applicable) - Annual sampling 2004-2005 at Blennerhassett Islan State Park, Mason Cty.

AR226-2382 /^OC^T/^A/ '3>AT-' ----.

i > C-8 Sum p Analysis Sheet Date Time Liquid Sample pH , NTU Solids Sample ^|a&l^ -. - ss^g------ \2-:t>l ^^ 7':^ 2.:^ ^^Q, ^A ^:L <-n .- ^-.

AR226-2520 Stephen R Peck 11/12/02 02:08 PM To: cc: Subject Ronald V Crosmun/CL/DuPont@DuPont John E Crum/SE/DuPont@DuPont, Ta-Wei Fu/SE/DuPont@DuPont, [_gQ ^ Lech/DuPont@DuPont, Thomas W Mahlberg/SE/DuPont@DuPont, Mark E Reeder/SE/DuPont@DuPont Eureka!

AR226-2541 RESPONSETO INFORMATION REQUESTEDREGARDINGAPRIL 1992 VI REPORT (REFERENCE;EPA REGION III LETTER DATED HAY 5, OUPONT WASHINGTONWORKS 1997) WVD045875291 Responses to information requested in the referenced EPA letter are presented below.

AR226-2574 GROUNDWATER INVESTIGATION QUALITY ASSURANCE PROJECT PLAN FOR WASHINGTON WORKS PLANT Date: January 2002 Project No.: D6WV/7423.01 CHB^ ^ CORPORATE REMEDIATION GROUP..

AR226-2601 Ohio EPA December 2,2003 'W' Objectives Provide grounding/update on recent activities Solicit input on upcoming activities '^-^--s^-s-ss ^,^f Agenda Water - GIST Final Report Recommendations - Proposed MOU Based on GIST Recommendations - OEPA Requests - DuPont Suggested Modifications Air - Review Recent Model Results - Air Permit Update - Additional Reduction Programs - Air Model Verification Plan Proposed Memorandum Understanding-West Virg DEP and Ohio EPA Summary of Activities December 2, 2003 '^^' GIST Report Recommendations Summary Final GIST report issued August, 2003 Continued quarterly/annual monitoring of certain Ohio River water systems Quarterly/annual monitoring of private water supplies (10 loca West Virginia and Ohio - West Virginia: Wash Works 0-2 mile radius and Dry Run Landfill/Letart Landfill 1-mile radius - Ohio: Wash Works 0-2 mile radius - List to include wells, springs, cisterns Conduct C8 monitoring at all DuPont Washington Works faci according to applicable West Virginia Solid Waste/NPDES, N and EPA HSWA (Corrective Action) permit requirements hV~'WSsy^ ^ Proposed MOU -Administrative Details Parties: - West Virginia Department of Environmental Protection - West Virginia Department of Health and Human Resour - Ohio Environmental Protection Agency - E.I, du Font de Nemours & Company Objectives: - Continued monitoring and reporting of C8 concentration gromidwater and surface water - Implement recommendations of me GIST concerning co sampling and monitoring in WV & Ohio ("in and around facilities") - Begin first quarter 2004 g g 5 " ^ 5 S I-1 .j " ro ljL U} U) Proposed MOU -Public Water System Samplin WV Public Water Systems: - Quarterly sampling 1Q2004-4Q2005 at Lubec DuPont WW, and GE production wells and fin water (if applicable) - Annual sampling 2004-2005 at Blemierhassett State Park, Mason Cty.

'ii^/' AR226-2819 Copies ,to:|---------- I .

AR226-2948 Performing Laboratory Haskell E.

92091 SPONSOR ElfAtochemSA.