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Former DuPont Barksdale Works Project Update

Former DuPont Barksdale Works Project Update. May 19, 2004 DuPont Corporate Remediation Group Great Lakes Visitors Center. Purpose of Presentation. Provide an update on the alternative water supply project

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Former DuPont Barksdale Works Project Update

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

  2. Purpose of Presentation • Provide an update on the alternative water supply project • Provide update on additional project work conducted since the January 2004 public meeting and planned work for 2004 Former DuPont Barksdale Works Project Update

  3. Presenters • Brad Nave • Project Director, DuPont Corporate Remediation Group (CRG) • Cary Pooler • Project Manager, URS Corporation Former DuPont Barksdale Works Project Update

  4. Alternative Water Supply Project

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

  6. Background of Proposed ProjectAlternative Water Supply • 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 Former DuPont Barksdale Works Project Update

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

  8. Eligible Properties Former DuPont Barksdale Works Project Update

  9. Pipeline Construction UpdateAlternative Water Supply • 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 • Bid meeting held on May 18th • Super Excavators • Reuben Johnson • Summit Environmental • S. J. Lewis • S. R. Weidema • Bidding will occur June 11th • Construction start anticipated for Summer 2004 Former DuPont Barksdale Works Project Update

  10. Construction PermitsAlternative Water Supply • Permits required from • WDNR • Approval to build pipeline • Stream crossings • Erosion control • US Army Corps of Engineers • Environmental permit • Bayfield County • Shoreline grading • Department of Transportation • Right-of-way occupancy • All permits currently in review and are anticipated to be issued by July Former DuPont Barksdale Works Project Update

  11. Chris Curran • Assistant Project Manager • Responsible for Barksdale pipeline design • Has lateral line sketches for those who have signed water agreements Former DuPont Barksdale Works Project Update

  12. Eric Bryan • Construction Engineer and Contract Administrator Former DuPont Barksdale Works Project Update

  13. Bill Barnes • Construction Manager and Site Safety Officer • Bill will be the primary contact for lateral line installation Former DuPont Barksdale Works Project Update

  14. Other Barksdale Site Work

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

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

  17. Site Investigation(continued) Former DuPont Barksdale Works Project Update

  18. Miscellaneous Site Work • 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 Former DuPont Barksdale Works Project Update

  19. Home Value Protection Program • 30700 Nolander - sold in April • 72450 Highway 13 - DuPont accepted purchase offer earlier this month • 72410 Highway 13 - DuPont has made offer to purchase Former DuPont Barksdale Works Project Update

  20. Questions or comments? Former DuPont Barksdale Works Project Update

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