Operational petrol station, Diss
A flow line failure to one of the diesel pumps on site resulted in hydrocarbon impact to the underlying soils and groundwater.
To enable the site to continue to operate and sell fuel, an insitu Multi Phase Extraction system was installed.
This system was supplemented with a proprietary Soil Washing process to reduce the contamination to the agreed residual criteria over a twelve month period.
In order to ensure that impact to neighboring residential properties did not occur a migration control system was installed around the perimeter of the site.
Client
Major oil company
Site
Operational petrol station, Diss, Norfolk
Problem
Hydrocarbon impact to the soil and groundwater
Technologies utilised
Multi phase extraction combined with in situ soil washing. installation of site perimeter migration control barrier
Remediation criteria
Free phase < 1mm thickness, VOCs < 50ppm, Soil TPH < 2200mg/kg, groundwater TPH < 1.7mg/l
Validation
Sampling and validation by an independent consultant
