former dupont barksdale works project update december 14, 2004 dupont corporate remediation group...
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Former DuPont Barksdale Works Project Update
December 14, 2004
DuPont Corporate Remediation Group
Great Lakes Visitors Center
December 14, 2004 Former DuPont Barksdale Works Project Update
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Purpose of Presentation
Provide an update on alternative water supply work completed since early November.
Present a summary of other site work completed in 4Q2004.
December 14, 2004 Former DuPont Barksdale Works Project Update
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DuPont Company Representatives
Brad Nave– Project Director, DuPont Corporate Remediation
Group (CRG)
Cary Pooler– Project Manager, URS Corporation
Alternative Water Supply Project
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Pipeline Construction UpdateAlternative Water Supply
Approximately 48,600 feet of main (ductile iron pipe and HDPE) and service lateral (copper line to homes) is specified in the current design.
To date, approximately 95% of the pipeline project (based on lineal footage) has been constructed.
– All pipeline mains have been completed (6.25 miles). Final section of main was hydro tested on October 29th.
– 86% of the laterals have been completed (~14,300 feet); 5 lateral installations remaining.
– 19% of eligible homes are using municipal water (9 current connections).
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Bjork R
d
On
dossago
n Rd
Main completed
Main to be completed
Barksdale Municipal Water Project Main Pipeline Completed as of October 29, 2004
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Pipeline Construction UpdateAlternative Water Supply
Majority of construction will be completed by the end of calendar year 2004, assuming:
– No regulatory delays.– Outstanding contractor performance (construction and safety).– Tolerable weather.– No unforeseen or unmanageable technical issues.
Anticipate completion of most of the remaining service lateral lines and final hook-ups during the next several weeks.
A few private properties will have to be fully restored (final grading and seeding) in 2005, due to weather issues. Also, the road restoration in Birch Grove will be completed in 2005 per Barksdale Township’s request.
Wetland issues at two properties have yet to be resolved; therefore, these lateral lines may be completed in 2005.
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Bjo
rk Rd
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
Final Connection made
Lateral Connections Remaining
Other Barksdale Site Work
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Residential Monitoring
A new detection of 2,6-DNT was reported as part of the August data set.– Result estimated by lab due to low concentration.– Result was below Wisconsin Enforcement
Standard.– Potentially affected home hooked-up to municipal
today. Carbon filters continue to be effective. Official report of results will be issued shortly.
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2004 Debris Removal
Inspected 275 acres, primarily along ditches and creeks, for debris remaining from plant activities.
Identified numerous items, which included drums, pipes, sheet metal, equipment parts.
Screened items found for explosive residues. None found.
About 45 items removed to off-site landfill. Additional recovery work will be conducted in 2005.
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2004 Debris Removal – typical items
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Site Investigation – Fall 2004
Field Activities (Sept. – Nov.):– 16 soil borings sampled.– 11 new wells installed.– 36 wells sampled (25 existing and 11 new).
Preliminary findings:– Groundwater conditions near site boundary and
burning ground appear stable.– No site related chemicals found below western
TNT refining buildings.– Two new groundwater contamination source areas
for east central plume identified; however, concentrations of site-related chemicals are low when compared to the Former Burning Grounds.
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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.– Preliminary results pending.
Continuing Georgia Tech research on destruction of DNT and TNT.
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Home Value Protection Program
Three homes purchased to date. Two have been resold. One home demolished.
Home Value Protection Program will remain in effect until six months after alternative water is available.– Property owners will be notified in early 2005.
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Questions or comments?