The RESPONSE project deals with the transport of point-source contaminants in soils and groundwater. There exist numerous types of pollution point sources, including landfills, industrial facilities, storage tanks, disposal of hazardous waste, etc. Point source contaminations in Belgium from historical or current activities are numerous and display a great variety in forms, areas and contaminants involved. In the context of the EU Groundwater Directive (2006/118/CE), plumes resulting from point sources have received particular attention. However, the huge number of confirmed or potential point source sites constitutes a challenge. New methods to assess the migration potential of contaminants are needed.