1 The Problem and Politics of Contaminated Sites.- 2 Institutions and the Environmental Management of Contaminated Sites: A Theoretical Framework.- 3 Environmental Management and Contaminated Sites in Switzerland.- 4 The Case Study of Bonfol Chemical Landfill: Logic of Selection, Data And Methods.- 5 Episode I: The Establishment of a Chemical Landfill in Bonfol Under the First Generation of Environmental Regulations (1955-1970).- 6 Episode II: The Closure Of Bonfol Chemical Landfill, the First Remediation Project, and the Second Generation of Environmental Regulations 1971-1994.- 7 Episode III: The Birth of a Contaminated Sites Policy and the Struggle Over the Definitive Remediation of the Bonfol Site (1995-2000).- 8 Episode IV: The Consolidation of the Institutional Regime for Contaminated Site, and the Gambling on the Remediation Objectives, Methods and Funding of the Bonfol site 2000-2008.- 9 Concluding Discussion: Institutional Regimes and Modes of Participation and Interaction in Environmental Decision-Making.