Former DuPont Barksdale Works Project Update

May 19, 2004

DuPont Corporate Remediation Group

Great Lakes Visitors Center

May 19, 2004 Former DuPont Barksdale Works Project Update

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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

May 19, 2004 Former DuPont Barksdale Works Project Update

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Presenters

Brad Nave– Project Director, DuPont Corporate Remediation

Group (CRG)

Cary Pooler– Project Manager, URS Corporation

Alternative Water Supply Project

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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

May 19, 2004 Former DuPont Barksdale Works Project Update

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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

May 19, 2004 Former DuPont Barksdale Works Project Update

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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

May 19, 2004 Former DuPont Barksdale Works Project Update

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Eligible Properties

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&V &V &V

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&V&V&V&V&V&V&V

&V

&V&V

&V

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&V &V&V

&V&V&V&V&V &V&V

&V

&V&V&V&V&V

&V

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29450N29600N 29890N

30900N30110N

73150BJ

30240N

30300N

30380N

30810N

30700N30490N

30600N

72480H72470H72450H

72420H72410H

72370H72330H

72520H

72920H72910H

72860H

72790H

72730H72700H

72040H

73500H

73300BC73280H73250H

&V Fire Call NumberParcel Boundary

Parcels Included in Municipal Water Supply AgreementRoads

LEGEND

May 19, 2004 Former DuPont Barksdale Works Project Update

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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

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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

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Chris Curran

Assistant Project Manager

Responsible for Barksdale pipeline design

Has lateral line sketches for those who have signed water agreements

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Eric Bryan

Construction Engineer and Contract Administrator

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Bill Barnes

Construction Manager and Site Safety Officer

Bill will be the primary contact for lateral line installation

Other Barksdale Site Work

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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)

May 19, 2004 Former DuPont Barksdale Works Project Update

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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

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Site Investigation(continued)

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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

May 19, 2004 Former DuPont Barksdale Works Project Update

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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

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Questions or comments?