Cover -- Front Matter -- Acknowledgments -- Preface -- Contents -- Synopsis -- Summary -- 1 Introduction -- 2 Conceptual Framework -- 3 Contaminant Reduction -- 4 Contaminant Isolation -- 5 Stewardship Activities -- 6 Contextual Factors -- 7 Fundamental Limits on Technical and Institutional Capabilities -- 8 Design Principles and Criteria for an Effective Long-Term Institutional Management System: Findings and Recommendations -- References Cited -- APPENDIXES -- APPENDIX A Committee's Statement of Task -- APPENDIX B Closure Plans for Major DOE Sites -- APPENDIX C Committee Information Gathering Meetings -- APPENDIX D Summary of Recent Stewardship Studies -- APPENDIX E Existing Legal Structure for Closure of the Weapons Complex Sites -- APPENDIX F Disposition of the Nevada Test Site -- APPENDIX G Mathematical Models Used for Site Closure Decisions -- APPENDIX H Biographical Sketches of Committee Members and Consultants -- APPENDIX I Definitions of Terms Used in This Report.