THE FRENCH APPROACH OF BROWNFIELD REDEVELOPMENT: GOVERNMENT STRATEGY AND SCIENTIFIC RESEARCH

摘要

In France, some old industrial regions are seriously concerned by the brownfield redevelopment. So, marked by more than one century of heavy industry, the North and the East of the country respectively concentrate about 10000 and 5000 ha of brownfield. Moreover, they are located in densely inhabited regions, what induces serious potential hazard for people but in the same time, significantly increases the ground value. The French government adjusted a national strategy of brownfield reclamation, based on the work of specific regional agencies of redevelopment and previous owners - when they still exist -.It involves a multiphases approach, including a risk assessment policy at the national scale, and a hierarchical system for classifying polluted sites in order to either remediate or monitor them. Besides, the government developed new "tools" specifically devoted to the control and the research of solutions to the technical brownfield reclamation. In this field, the National Research Centre for Polluted Sites and Soils has been created in 1996, mixing public funding and private sponsors. Located in the North of France, it is directly involved in the brownfield investigation. In this respect, the research team has studied the transfer of pollutants from areas of former industrial activity into the environment, and the impact of their migration downstream. Two types of pollution have been particularly followed for 4 years: PAH's lagoons and Cr-As discharges. Examples of plume evolution during time will be illustrated for these two groups of products and the methodology commented.