In process-controlled remediation of contaminated land the prospects for lasting success of a particular technique are often governed by the physicochemical properties and composition of the soil environment. Using a range of physical, chemical and biological techniques, this project will investigate these parameters and the key determinants at separate chromium- and polycyclic aromatic hydrocarbon-contaminated sites in central Scotland. The data will then be used to generate, for the specific types of sites and remedial approaches, customised linked chemical/physical transport models within which the influence of these parameters on site stability and remediative effectiveness can be tested. The latter will be further assessed via post-remedial screening of soil microbiological activity.