1. Weldon Spring Site: Past, Present, and Future
2010 Long-Term Surveillance
and Monitoring Conference
Grand Junction, Colorado
Patrick Anderson, Environmental Engineer
Missouri Department of Natural Resources
Hazardous Waste Program
Federal Facilities Section
November 18, 2010

2. Site Map

3. Site Map

4. Brief History of the Weldon Spring Site
– U.S. Army acquires 17,000+ acres in St. Charles County, Missouri
– Explosives produced at the Weldon Spring Ordnance Works
1956 – 217 acres transferred to the Atomic Energy Commission (AEC); Quarry transferred in 1958
– Weldon Spring Uranium Feed Materials Plant processed uranium ore concentrates

5. Weldon Spring Uranium Feed Materials Plant (a. k. a
Weldon Spring Uranium Feed Materials Plant (a.k.a. Chemical Plant)

6. Brief History of the Weldon Spring Site
– Chemical Plant returned to the Army for defoliant production. Weldon Spring Site held in caretaker status.
1985 – Chemical Plant transferred to DOE
1987 – 30 July - Quarry placed on NPL list
1989 – 30 March - Chemical Plant placed on NPL List

7. Weldon Spring Quarry

8. Condition of Site Prior to Cleanup

9. Condition of Site Prior to Cleanup

10. Condition of Site Prior to Cleanup

11. Condition of Site Prior to Cleanup

12. Public Reaction

13. Cleanup and Final Disposition

14. Cleanup and Final Disposition

15. Cleanup and Final Disposition

16. Cleanup and Final Disposition

17. Cleanup and Final Disposition

18. Present Conditions Monitored Natural Attenuation
Institutional Controls
Long-Term Surveillance and Monitoring Plan
Annual Inspections
Interpretive Center
Hike and Bike Trails
Prairie
Outreach

19. Present Conditions Unresolved Issues
The State does not agree with some of DOE's statements about the site
Federal Facilities Agreement between DOE, EPA, and MDNR

20. Future Continuation of Liability and Due Diligence
Interpretive Center and Outreach
Training and Teaching the Next Generations
Hosting Events
Maintain a Site Presence
Institutional Knowledge (People forget)
Is the Groundwater Safe?
Is the Fish and Game Safe to Eat?
Development Pressure
Encroachment
Right Price, Meet Budget Shortfalls

21. Thank You