Historically the 0.17 hectares site was occupied by a Petrol Filling Station and vehicle service/repair garage, with associated under ground fuel storage tanks and pipe work.
The intrusive investigations revealed the main contamination source to be an area previously occupied by underground storage tanks where elevated concentrations of Total Petroleum Hydrocarbon (TPH) and BTEX were identified.
The site was being developed into a housing estate comprising of a mixture of two storey houses with associated gardens, landscaping, car parking and an access road.
The remediation strategy for the site was designed to address the on-site source contamination and indirectly, the pathway contamination issues with the intention of protecting the end user and the locally important underlying aquifer located in sands and gravels beneath the site.
Envirotreat employed an ex-situ soil mixing remediation strategy for the treatment of over 300m³ of contaminated soils.
The treated / validated soils were then temporarily stockpiled before being reused on-site as a substitute for imported clean fill, thus preventing the need for off site disposal.
