Over the years, various industrial activities have had a huge impact on the environment. Often, after closing down operations, sites were abandoned as they were too polluted for launching new activities such as residential or commercial buildings. Today, people are increasingly drawing the card of revitalising such sites, but the problem remains: what to do with the heavily contaminated soils? Jan De Nul and its daughter companies Envisan and PSR are giving contaminated sites a second lease of life, thanks to a wide range of remediation techniques. In doing so, we always look for innovative and sustainable techniques.