Former DuPont Barksdale Works Project Update May 19, 2004 DuPont Corporate Remediation Group Great Lakes Visitors Center

May 19, 2004Former DuPont Barksdale Works Project Update2 Purpose of Presentation n Provide an update on the alternative water supply project n Provide update on additional project work conducted since the January 2004 public meeting and planned work for 2004

May 19, 2004Former DuPont Barksdale Works Project Update3 Presenters n Brad Nave – Project Director, DuPont Corporate Remediation Group (CRG) n Cary Pooler – Project Manager, URS Corporation

Alternative Water Supply Project

May 19, 2004Former DuPont Barksdale Works Project Update5 Background of Proposed Project Alternative Water Supply n Groundwater near the former Barksdale Works is contaminated with compounds associated with DuPont’s former explosives manufacturing activities n DuPont has made a commitment to make an alternative water supply available to eligible home and property owners n DuPont evaluated several water supply options and a pipeline from Washburn to Barksdale is the leading option

May 19, 2004Former DuPont Barksdale Works Project Update6 Background of Proposed Project Alternative Water Supply n DuPont committed to provide the following to eligible home and property owner’s in Barksdale – Finance and build an alternative water supply – Pay for operations and maintenance – Pay for water used (within generous limits) for as long as the eligible residents own their home

May 19, 2004Former DuPont Barksdale Works Project Update7 Pipeline Construction Update Alternative Water Supply n Agreement between Barksdale, Washburn, and DuPont signed on January 28 th – DuPont will build the system – Washburn will operate and maintain the line n Ordinance adopting agreement was passed by Washburn on March 8 th n To date 33 owners have signed up for water – Remaining eligible owners are encouraged to sign the agreement

May 19, 2004Former DuPont Barksdale Works Project Update8 Eligible Properties

May 19, 2004Former DuPont Barksdale Works Project Update9 Pipeline Construction Update Alternative Water Supply n Pipeline design is at 90% – Currently incorporating comments from permitting agencies, Washburn, and bidders – Need feedback from individual homeowners for curb stop and lateral line routing n Bid meeting held on May 18 th – Super Excavators – Reuben Johnson – Summit Environmental – S. J. Lewis – S. R. Weidema n Bidding will occur June 11 th n Construction start anticipated for Summer 2004

May 19, 2004Former DuPont Barksdale Works Project Update10 Construction Permits Alternative Water Supply n Permits required from – WDNR n Approval to build pipeline n Stream crossings n Erosion control – US Army Corps of Engineers n Environmental permit – Bayfield County n Shoreline grading – Department of Transportation n Right-of-way occupancy n All permits currently in review and are anticipated to be issued by July

May 19, 2004Former DuPont Barksdale Works Project Update11 Chris Curran n Assistant Project Manager n Responsible for Barksdale pipeline design n Has lateral line sketches for those who have signed water agreements

May 19, 2004Former DuPont Barksdale Works Project Update12 Eric Bryan n Construction Engineer and Contract Administrator

May 19, 2004Former DuPont Barksdale Works Project Update13 Bill Barnes n Construction Manager and Site Safety Officer n Bill will be the primary contact for lateral line installation

Other Barksdale Site Work

May 19, 2004Former DuPont Barksdale Works Project Update15 Residential Monitoring n April 2004 sampling results (10 potable wells) will be transmitted to WDNR shortly – Preliminary results indicate no detections of site- related compounds n Annual change-out of carbon cylinders was completed in March/April 2004 – Two seasonal homes remain n Next sampling event will be conducted in September (approximately 82 homes)

May 19, 2004Former DuPont Barksdale Works Project Update16 Site Investigation n Trenching and further sampling in production areas is starting May 24 th – Using robotic equipment – 33 areas to be excavated – Focusing within the former manufacturing area n 10 new monitoring wells will be installed in the summer n Additional groundwater sampling to be conducted in late summer/early fall

May 19, 2004Former DuPont Barksdale Works Project Update17 Site Investigation (continued)

May 19, 2004Former DuPont Barksdale Works Project Update18 Miscellaneous Site Work n Continuing work with Adventus to evaluate a new generation of soil amendments to reduce concentrations of nitroaromatic/nitramine compounds in soil – Generation 3 product uses nano-scale zero valent iron

May 19, 2004Former DuPont Barksdale Works Project Update19 Home Value Protection Program n Nolander - sold in April n Highway 13 - DuPont accepted purchase offer earlier this month n Highway 13 - DuPont has made offer to purchase

May 19, 2004Former DuPont Barksdale Works Project Update20 Questions or comments?