1. River Corridor Closure Project Safety People Results End State and Final Closure Jeff A Lerch Manager, Long Term Stewardship June 1 and 2, 2006

2. River Corridor Closure Project Safety People Results E0601041_2 General Scoping Highlights Beginning of process to establish final cleanup decisions is… Key to shared success in the River Corridor

3. River Corridor Closure Project Safety People Results E0601041_3 General Scoping Highlights Present strategy and alternatives Ensure integrated approach Identify challenges Provide foundation for discussions and pathway selection –Regulatory approval and pathway selection not required per scoping agreements –TPA change package and milestones to document agreements

4. River Corridor Closure Project Safety People Results E0601041_4 Document Organization 1.0 Introduction 2.0 Status of Current Activities 3.0 Hanford Site Programs 4.0 Project Organization and Baseline 5.0 WCH Performance Plan 6.0 Potential Alternative Approaches 7.0 Issues and Challenges 8.0 Conclusions/Path Forward

5. River Corridor Closure Project Safety People Results E0601041_5 WCH Performance Plan for Final Cleanup Decisions Objective: Lock-in final remedial action objectives and exposure scenario mid way through contract Integrated with but not dependent on groundwater schedule Acceleration and enhancement of selected scope items One proposed plan for all source operable units

6. River Corridor Closure Project Safety People Results E0601041_6

7. River Corridor Closure Project Safety People Results E0601041_7 Potential Alternatives Operable unit groupings based on anticipated schedules, exposure scenarios, and cleanup effectiveness Aspects may be dependent on other Hanford contractors

8. River Corridor Closure Project Safety People Results E0601041_8 Issues and Challenges Source unit and GW schedule alignment Integration role assignment, authority, and budget Exposure scenarios and land use Modeling for residual conditions (dose and contaminant transport)

9. River Corridor Closure Project Safety People Results E0601041_9 Key Schedule Items 6/6Meeting to discuss initial RL comments ~6/29Briefing with Regulators; Distribution of Review Copies 8/14All comments due 9/26Transmit final document