FrontMatter -- Preface -- Contents -- Summary -- 1 Introduction -- 2 Magnitude of the Problem -- 3 Remedial Objectives, Remedy Selection, and Site Closure -- 4 Current Capabilities to Remove or Contain Contamination -- 5 Implications of Contamination Remaining in Place -- 6 Technology Development to Support Long-Term Management of Complex Sites -- 7 Better Decision Making During the Long-Term Management of Complex Groundwater Contamination Sites -- Acronyms -- Appendix A: Biographical Sketches of Committee Members and Staff -- Appendix B: Complex Site List -- Appendix C: Analysis of 80 Facilities with Contaminated Groundwater Deleted from the National Priorities List.