We were commissioned to design and implement a remediation strategy for the residential redevelopment of a former goods vehicle depot. The strategy adopted provided a sustainable, integrated and cost effective solution.

Site investigation indicated a significant area of hydrocarbon contamination related to underground diesel storage tanks. The remediation strategy comprised tank removal and stabilisation of contaminated soils using e-clay technology. This avoided the need to dispose of material off site and minimised the import of fill to restore the site.

E-clay treated soil was also used to provide ‘filter’ zones within a cut-off barrier wall to prevent off-site migration of contaminated groundwater. The barrier was installed by the same rig used to construct the structural piles for the development.