former dupont barksdale works project update august 3, 2005 dupont corporate remediation group great...

Former DuPont Barksdale Works Project Update

August 3, 2005

DuPont Corporate Remediation Group

Great Lakes Visitors Center

August 3, 2005 Former DuPont Barksdale Works Project Update

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Purpose of Presentation

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– Project Director, DuPont Corporate Remediation

Group (CRG)

Cary Pooler– Project Manager, URS Corporation

Alternative Water Supply ProjectBrad Nave


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Pipeline Construction UpdateAlternative Water Supply

On June 17, 2005, the construction was completed.– 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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Remaining restoration work for 2005:– Address engineering inspection items.– Minor property restoration (reseeding, driveway

patching, and grading).– Road repairs.

Well abandonment to commence in early September.– Anticipate limited or no impact to currently

restored properties.


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Road repairs to be completed:– 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).

Other Barksdale Site WorkCary Pooler


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2005 Residential Monitoring

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

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.

– Preliminary results are consistent with previous sampling. Field work for the southern area of the site is

complete, per WDNR approved work plan:– 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

TNT/TNX Area

NItramex / Nitramon

Burning Ground

Acid Area

TNT/DNT Area

NG/Dynamite

Area


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Southern Area Sampling Grid


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2005 Site Investigation Work (continued)

Continue to investigate former manufacturing areas (via trenching and soil sampling).

Continue to monitor on-site groundwater conditions.

GA Tech ResearchBrad Nave


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Site-related Research Work

Continuing Georgia Institute of Technology research on destruction of DNT and TNT.

– 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 Proposed pilot project is a simple set up with low operation and

maintenance requirements.

Water & Nutrients

(phosphate, magnesium, calcium,

iron)

DNT Biodegradation ReactorSite Soils

Contaminated w/ DNT (source of bacteria and DNT)

Buffer(pH control)

1 DNT 2 NO2

-

Methanol +NO2

-

N2 + CO2 + H2O

Methanol (wood alcohol)

Denitrification Reactor to Remove Nitrite

(bacteria from soils)


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Home Value Protection ProgramBrad Nave


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Home Value Protection Program

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.– 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?

former dupont barksdale works project update august 3, 2005 dupont corporate remediation group great...

Documents

n sampling

barksdale township

residential monitoring

n nolander east of bjork

n average daily use

municipal water

water quality

urs corporation slide