1. Presentation of 2002 Barksdale Investigations and Path Forward
June 25, 2002
Presented by:
DuPont Corporate Remediation Group

2. Introduction
Brad Nave

3. 2002 Barksdale Investigations and Path Forward
Presenters
Brad Nave
Introduction, Background, and General Project Overview
Cary Pooler, P.G.
2001 Findings and Recommendations
Jon Hammerberg, P.E.
Historical Document Review Findings
2002 Recommendations and next steps
June 25, 2002
2002 Barksdale Investigations and Path Forward

4. Today’s Public Meeting
Reviews 2001 site investigation results
Discusses actions taken since 2001
Shares current historical review results
Discusses future project plans
Provides an opportunity to ask questions
June 25, 2002
2002 Barksdale Investigations and Path Forward

5. 2002 Barksdale Investigations and Path Forward
The DuPont Philosophy
Conduct investigations that allow DuPont and the regulatory agency to make informed decisions and take appropriate steps to protect human health and the environment
June 25, 2002
2002 Barksdale Investigations and Path Forward

6. Former Barksdale Works Location
Wedal Road
East Ondassagon Road
Ondassagon Road
Nolander Road
State Hwy 13
Bjork Road
Former Plant
June 25, 2002
2002 Barksdale Investigations and Path Forward

7. Overall Project Objectives
Provide drinking water that meets appropriate Wisconsin regulatory standards for all site-related compounds
Develop plan for long-term drinking water supply and implement as appropriate
Evaluate for potential off-site surface issues and take appropriate action
Identify priority source areas and take appropriate action
June 25, 2002
2002 Barksdale Investigations and Path Forward

8. 2001 Findings and Recommendations
Cary Pooler

9. 2001 Investigation Findings
Groundwater:
Plumes identified in east-central and northeast areas
Nitroaromatic/nitramine organics are the primary COPCs
Three groundwater zones identified
COPCs are limited to the shallow and intermediate zones
Deep flow zone has potential as a drinking water supply
Former Production Areas:
Site-related constituents are present in the former production areas which could be exposed to erosion.
Former Operation Area:
A release is indicated near the Burning Ground which may have contributed to groundwater impact.
Site-related constituents are present at the Burning Ground surface which could be exposed to erosion.
June 25, 2002
2002 Barksdale Investigations and Path Forward

10. 2002 Barksdale Investigations and Path Forward
2001 Recommendations
Priority 1: Continue to operate and maintain drinking water treatment systems while evaluating alternative supplies:
Install systems at residences with identified impacts
Conduct regular maintenance and sampling
Continue analytical sampling to confirm correct operation
Continue to communicate results to WDNR
June 25, 2002
2002 Barksdale Investigations and Path Forward

11. 2001 Recommendations (continued)
Priority 2: Continue to collect information to be used to plan for an alternative long-term drinking water supply:
Obtain residential well construction details
Confirm analytical results from the deep zone
Install additional monitoring wells
Conduct deep zone pumping tests
June 25, 2002
2002 Barksdale Investigations and Path Forward

12. 2001 Recommendations (continued)
Priority 3: Identify off-site soil or sediment issues and address as appropriate:
Implement erosion control measures as appropriate to prevent potential off-site migration of site-related constituents from production areas identified in 2001
Complete sediment sampling in on-site drainages as appropriate
June 25, 2002
2002 Barksdale Investigations and Path Forward

13. 2001 Recommendations (continued)
Priority 4: Identify source areas and take appropriate action:
Review the results of the surface water and sediment sampling and communicate to WDNR
Continue detailed historical research into past operations
Continue working with WDNR to plan future investigations for areas requiring further action
June 25, 2002
2002 Barksdale Investigations and Path Forward

14. Historical Document Review
Jon Hammerberg

15. Historical Documentation Review
Purpose
Provide a framework for management of information
Prioritize screening and sampling efforts
Goals
Identify former uses of site areas
Identify former uses of site buildings
Identify potential chemicals and products present
Identify former chemical routes of migration .
June 25, 2002
2002 Barksdale Investigations and Path Forward

16. Historical Documentation Review: Process:
Identify information sources
Obtain copies of documents from sources
Review documents obtained for relevance
Cross reference documents to determine position on site
Ground truth positions and conditions of buildings identified
Obtain specific details on identified areas
Ground-truth reports of employees and experts
Revise site maps and repeat process as needed
June 25, 2002
2002 Barksdale Investigations and Path Forward

17. Historical Documentation Review - Status
Sources of documents were identified in summer 2001
Documents were requested from sources in fall 2001
Compiled documents through March 2002
Cross-referenced documents from March through May
Ground truthed documents from May through June
Several process areas remain to be ground truthed including the NG, Powder and Dynamite lines. A second round of ground truthing has been started this week.
Employee interviews will begin in July. Additional ground truthing is planned to follow the interviews.
June 25, 2002
2002 Barksdale Investigations and Path Forward

18. Historical Review - Preliminary Observations
Production areas ground truthed to date are:
TNT (Triton) production lines 1 through 10
TNX production lines 1 through 5
DNT (Trivelene and Lydol) production lines 1 through 3
Triton Refine
Triton Finishing
Powder Line (DNT pumps and screening houses only)
Nitramex/Nitramon
Primer Pack
June 25, 2002
2002 Barksdale Investigations and Path Forward

19. Historical Review - Preliminary Observations (cont.)
Support areas/buildings ground truthed to date are:
OV Plant
Power Plant and Laundry
Lead Melting Pot
Ammonium Nitrate Cystalizer
Empty Barrel Store
Magazines (16 built in WW-I, 7 kept in WW-II, 1 built post 1966)
June 25, 2002
2002 Barksdale Investigations and Path Forward

20. Historical Review - Preliminary Observations (cont.)
Operational period waste areas ground truthed are:
Burning Ground
Crushed Barrel Dump
Reed Fields
Decomissioning period waste areas identified are
Decon Burn Area (on top of former reed fields)
Demolition debris piles in production areas
Former Power Plant Reservoir debris dump
June 25, 2002
2002 Barksdale Investigations and Path Forward

21. Historical Review - Preliminary Observations (cont.)
Bare spots found in 2001 correlate with nitration, neutralization and graining building foundations in the No. 2 and No. 4 TNT lines. Similar spots have since been found near neutralization and graining buildings in the other TNT lines or the equivalent buildings in the DNT lines.
Acid area soil samples with detected nitramine compounds (Area 2 samples 3 and 4) were in an area near former waste acid recycling tanks. Bare spots were also found near the waste acid rail car loading areas at the production lines.
Areas covered with cinders were observed in the acid plants, lead melt pot and shop/office areas.
Bare spots were not observed to date in the TNX, Nitramex or Powder Line areas.
June 25, 2002
2002 Barksdale Investigations and Path Forward

22. Historical Review - Preliminary Conclusions
The foundations observed in the areas ground truthed to-date correspond very well to the buildings shown on the historic plans indicating that the plans provide reliable depictions of former site operations.
The processes identified on the drawings agree with the site operational area designations shown in past reports indicating that past assumptions regarding historic operations remain valid.
No process areas have been identified by the historic documents which would change our belief that there have not been releases from the site to land located to the northwest, west, or south.
June 25, 2002
2002 Barksdale Investigations and Path Forward

23. Historical Documentation Review
Next Steps:
Integrate findings into the prioritized site investigation effort.
Continue review of documents as they become available
return
June 25, 2002
2002 Barksdale Investigations and Path Forward

24. Questions and Comments?

25. 2002 Barksdale Investigations and Path Forward
General Information
Contact DuPont:
(715)
Project website:
Next meeting will be 3rd Quarter 2002
June 25, 2002
2002 Barksdale Investigations and Path Forward

26. Thanks for coming tonight