Transcript Barksdale Alternative Water Supply Project Proposal

Former DuPont Barksdale Works
Project Update
August 3, 2005
DuPont Corporate Remediation Group
Great Lakes Visitors Center
Purpose of Presentation
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
Provide an update on alternative water supply
project.
Present a summary of other site work
conducted and planned in 2005.
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DuPont Company Representatives

Brad Nave
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Project Director, DuPont Corporate Remediation
Group (CRG)
Cary Pooler
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August 3, 2005
Project Manager, URS Corporation
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Alternative Water Supply Project
Brad Nave
Pipeline Construction Update
Alternative Water Supply

On June 17, 2005, the construction was
completed.
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All pipeline mains have been completed (6.25
miles).
Last lateral was connected on June 17, 2005.
Forty-eight properties are anticipated to use water
in 2005.
Remaining eight properties may use water at a
future date.
Feedback from residents regarding water quality
and pressure has been very positive.
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Pipeline Construction Update
Alternative Water Supply

Remaining restoration work for 2005:
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Address engineering inspection items.
Minor property restoration (reseeding, driveway
patching, and grading).
Road repairs.
Well abandonment to commence in early
September.
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Anticipate limited or no impact to currently
restored properties.
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Pipeline Construction Update
Alternative Water Supply

Road repairs to be completed:
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Minor shoulder work on HWY13 (address WIDOT inspection
items).
Nolander road restoration (to be managed by Barksdale
Township and paid by DuPont):
 Nolander from west of Bjork to pipeline end:
– Pulverization of existing roadway and rough grade.
– 4-in. thick supplemental crushed aggregate base.
– 3-in. thick Hot-mix asphalt pavement.
– Shoulder gravel.
 Nolander east of Bjork to HWY 13:
– 1 1/2-in. asphalt surface to be applied.
Bjork Road (reimburse Barksdale Township for gravel
added).
Birch Grove (additional shoulder work and minor paving).
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Other Barksdale Site Work
Cary Pooler
2005 Residential Monitoring
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Working with WDNR to develop a new
residential well monitoring program for homes
that lie directly south and east of the site that
are not connected to municipal water.
Sampling anticipated to begin in late August
or September, pending WDNR approval.
Proposed sampling frequency is biennial for a
5 year period.
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Pipeline O&M
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Project provides for management of
municipal supply for eligible properties.
To date, DuPont has paid over $83,000 in
bills and currently owes $1,100.
Several homeowners have exceeded the
allotted daily volume of 300 gallons. DuPont
will contact these homeowners to discuss
usage.
Average daily use for the 38 homes
connected to the system in 2Q05 was 100
gallons per household per day.
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2005 Site Investigation Work

Conducted sediment and surface water sampling in
April 2005. September 2005 targeted as transmittal
date of the findings.
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Preliminary results are consistent with previous sampling.
Field work for the southern area of the site is
complete, per WDNR approved work plan:
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Samples were collected on a “grid” covering the entire
southern area, which was supplemented by biased samples
in former product storage areas and rail beds.
Approximately 680 locations were drilled to comprise
approximately 410 samples that were submitted for analysis.
Preliminary laboratory results will be reported to DuPont in
about 45 days.
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Drainages sampled in April 2005
Acid Area
TNT/TNX
Area
TNT/DNT
Area
NG/
Dynamite
Area
Burning
Ground
NItramex /
Nitramon
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Southern Area Sampling Grid
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2005 Site Investigation Work (continued)
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Continue to investigate former manufacturing
areas (via trenching and soil sampling).
Continue to monitor on-site groundwater
conditions.
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GA Tech Research
Brad Nave
Site-related Research Work
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Continuing Georgia Institute of Technology research
on destruction of DNT and TNT.
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Study being conducted by Dr. Joe Hughes (Professor and
Chair of the Civil Engineering Dept. at Ga. Tech) and Dr. Jim
Spain.
Study initiated in early 2004 and is ongoing.
A portion of their research on TNT destruction is expected to
be published in the journal Environmental Science &
Technology within the next year.
Scaled-up DNT bioremediation project will be undertaken at
Georgia Tech facility.
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Proposed Barksdale Soil Biodegradation
Pilot
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Proposed pilot project is a simple set up with low
operation and maintenance requirements.
Methanol
(wood alcohol)
Water &
Nutrients
(phosphate,
magnesium, calcium,
iron)
DNT Biodegradation Reactor
Site Soils
Contaminated w/ DNT
(source of bacteria and DNT)
Denitrification Reactor
to Remove Nitrite
(bacteria from soils)
2 NO2-
N2 + CO2 + H2O
1 DNT
Buffer
(pH control)
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Methanol
+
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Home Value Protection Program
Brad Nave
Home Value Protection Program
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Four properties purchased to date. Two have
been resold. One home removed, but
property retained.
One additional property is being processed.
Home Value Protection Program will remain
in effect until six months after alternative
water is available.
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Availability of the program will be the last calendar
day of August 2005 for most residents.
Written notification was made in February 2005 to
appropriate property owners.
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Questions or comments?
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