A pioneering new four-dimensional contaminated land mapping technology is being used for the first time to develop a remediation strategy for a former gas works in Stamford in Lincolnshire. The CLARET project (Contaminated Land: Assessment of Remediation by Electrical Tomography) allows real-time monitoring of sites long after remediation has been completed and complements existing practices, such as intrusive sampling and contaminant transport modelling, to give a more accurate assessment of the success of remediation methods. CLARET is being led by VHE and the British Geological Survey, a world leader in the development and application of geoelectrical imaging. The consortium partners are Interkonsult Ltd, an innovative engineering practice specialising in subsurface environments, and South Kesteven District Council, who provide a regulator's perspective. The project is part-funded by the DTI Technology Programme, which supports innovative projects in priority areas. Website: www.claretproject.org