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

River Corridor Closure Project Safety People Results E _2 General Scoping Highlights Beginning of process to establish final cleanup decisions is… Key to shared success in the River Corridor

River Corridor Closure Project Safety People Results E _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

River Corridor Closure Project Safety People Results E _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

River Corridor Closure Project Safety People Results E _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

River Corridor Closure Project Safety People Results E _6

River Corridor Closure Project Safety People Results E _7 Potential Alternatives Operable unit groupings based on anticipated schedules, exposure scenarios, and cleanup effectiveness Aspects may be dependent on other Hanford contractors

River Corridor Closure Project Safety People Results E _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)

River Corridor Closure Project Safety People Results E _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