Former DuPont Barksdale Works Project Update July 14, 2004 DuPont Corporate Remediation Group Great Lakes Visitors Center

July 14, 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 May 2004 public meeting and planned work for 2004

July 14, 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

July 14, 2004Former DuPont Barksdale Works Project Update5 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 All eligible homeowners have signed up for water

July 14, 2004Former DuPont Barksdale Works Project Update6

July 14, 2004Former DuPont Barksdale Works Project Update7 Construction Permits Alternative Water Supply n Permits and approvals 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 – City of Washburn n Design approval

July 14, 2004Former DuPont Barksdale Works Project Update8 Construction Permits Alternative Water Supply n All permits currently received with the exception of Bayfield County Zoning (permit approved, needs signature) n Washburn follow-up to City Council approval of Water Agreement – Letter officially documents City of Washburn’s acceptance of the Barksdale Water Pipeline design. n Four votes for approval n 2 abstained (new council members) n 1 opposed (new council member)

July 14, 2004Former DuPont Barksdale Works Project Update9 Easements Alternative Water Supply n Easement agreements filed for three properties along Bigelow Street (within Washburn City limits) – City of Washburn property – Bayfield County property – One private property

July 14, 2004Former DuPont Barksdale Works Project Update10 Pipeline Construction Update Alternative Water Supply n Pipeline design is at 99% – Comments from permitting agencies, Washburn, and bidders have been incorporated – Need feedback from a few individual homeowners for curb stop and lateral line routing n Bid meeting held on May 18 th – Super Excavators – Reuben Johnson and Sons – Summit Environmental – S. J. Lewis – S. R. Weidema n Bidding occurred in June – selected contractor is Rueben Johnson and Sons, Inc. (official contract immanent)

July 14, 2004Former DuPont Barksdale Works Project Update11 Pipeline Construction Update Alternative Water Supply n Construction start anticipated for July 26 th pending finalization of contract with Reuben Johnson and Sons, Inc. n Construction completion targeted for end of calendar year 2004, assuming: – No regulatory delays – Outstanding contractor performance (construction and safety) – Favorable weather

Other Barksdale Site Work

July 14, 2004Former DuPont Barksdale Works Project Update13 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 completed in June n Next sampling event will be conducted in late summer (approximately 82 homes starting on August 23rd)

July 14, 2004Former DuPont Barksdale Works Project Update14 Site Investigation n Trenching and further sampling in production areas started May 24 th and completed July 9, – 33 trenches excavated – 300 pounds of TNT recovered for off-site disposal – Used robotic equipment – Focus was 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

July 14, 2004Former DuPont Barksdale Works Project Update15 Site Investigation (continued)

July 14, 2004Former DuPont Barksdale Works Project Update16 Site Investigation (continued)

July 14, 2004Former DuPont Barksdale Works Project Update17 Site Investigation (continued)

July 14, 2004Former DuPont Barksdale Works Project Update18 Site Investigation (continued)

July 14, 2004Former DuPont Barksdale Works Project Update19 Site Investigation (continued)

July 14, 2004Former DuPont Barksdale Works Project Update20 Home Value Protection Program n Nolander - sold on April 21 st n Highway 13 – sold on June 10 th n Highway 13 – purchased on June 29 th – Home is in poor condition – Structural and moisture issues exist – Interior mold issues exist – DuPont is strongly considering removal of the structure n Program will remain in effect until six months after alternative water is available

July 14, 2004Former DuPont Barksdale Works Project Update21 Questions or comments?