Setting the Course for Cleanup

1. Setting the Course for Cleanup Key Decision: Waste Disposition Siting of a Potential On-Site Disposal Cell (OSDC) Marc Jewett, Manager, Regulatory Planning and Implementation September 1, 2011

2. Where We Are Now • Fluor-B&W appreciated the SSAB’s invitation to attend the Executive Planning Session. • The SSAB’s work this year will help drive decisions that will prepare this site to meet the community’s future needs. • Today we will work to put yet another decision piece in place to D&D the site and meet that future need.

3. The Key Decisions • Land use after cleanup. • SSAB input requested by December 2011. • Process Building D&D. • SSAB input requested by December 2011 • Final cleanup levels for water and soil. • SSAB input requested by December 2011 and March 2012. • Waste Disposition. • SSAB input requested by October 2011 and March 2012 .

4. Participants in Key Decisions Ohio EPA Considers DOE’s proposed solutions, approves end use decisions Post Cleanup Land Use US DOE Proposes solutions, evaluates input, and implements decisions 4 4

5. Today’s Key Decision: OSDC Siting • Requested input from SSAB by October board meeting: • If an OSDC were to be built, what is the SSAB’s preferred location(s)? • Which location(s) would not be acceptable?

6. Key Decision: Waste Disposition OSDC SITING EFFORT TO DATE

7. Previous Siting Studies • The entire site has been evaluated. • Study areas were about 150 acres each. • The ID numbers are in no particular order.

8. Current Waste Disposition RI/FS After reviewing the results of the previous siting studies, four study areas are being considered in the Waste Disposition RI/FS Study: Site D • Site A – Air Strip/Hillside • Site B – Switch Yard • Site C – Hilltop (Southeastern) • Site D – Hilltop (Northeastern) Site C Site B Site A

9. Decision Analysis –Preliminary Technical Ranking Site C N Site D

10. Key Decision: Waste Disposition SUPPORTING INFORMATION OF THE RANKING

11. Consider SSAB Recommendations(those relevant to OSDC siting are highlighted)

12. Decision Analysis – Accommodationof SSAB Recommendations SSAB Recommendation 11-01

13. Decision Analysis – Factors Considered • Satisfy Critical Requirements: • Full regulatory compliance • Better long term protectiveness of environment • Meet stakeholder values and priorities • Achieve Operational Objectives: • Right timing (i.e., 2013) • Higher waste acceptance criteria • Efficient transportation route • Sufficient capacity (i.e., 5 M cubic yards) Meet Criteria • Potential impact to neighbors • Potential impact to other operations • Potential impact to green field • Potential impact to cultural resources Minimize Adverse Effects

14. Geologic Structure at PORTS

15. Key Factors - Good HydrogeologicalConditions at Sites C and D • Factors Considered: • Depth to Water • Net Recharge • Soil Media • Vadose Zone Media • Aquifer Media • Topography • Hydraulic Conductivity • (including impacts of fractures) D B A C

16. Key Decision: Waste Disposition PRELIMINARY ENGINEERING LAYOUTS

17. OSDC Conceptual Model At Site C West East

18. OSDC Conceptual Model At Site D

19. Maximize Re-Industrialization Area Site D Site C

20. Next Steps: Waste Disposition