Abstract
The aim of this paper is to examine and clarify the procedures of treatment and redevelopment process by undertaking case study of former factory and landfill sites in the Netherlands. It also tries to find the effect and difficulties of Soil Protection Act 1994. Investigation methods used are interviews and site visits, and ten cases have been investigated. In conclusion, it became clear that the act is effective to apply in the different stages of investigation and remediation of the contaminated sites, and also the application was wide to cover various cases.