REDS Group were commissioned to complete remediation of residual hydrocarbon contamination at a former industrial site, prior to the surrender of an existing lease and future redevelopment.
All works were required to be completed and validated in under six months, requiring a highly aggressive and focused remedial strategy.
The site was located in an area of high environmental sensitivity, adjacent to a tidal river and designated SSSI. The underlying geology was variable and complex, the former operational areas were spilt over two distinct zones and the site had suffered a significant fuel leak in the past.
Intrusive Site Investigation
Detailed Quantitive Risk Assessment (DQRA)
Dissolved hydrocarbon concentration
Dissolved oxygen concentration
Direct correlation observed between groundwater elevations and tide
Groundwater samples were collected using low-flow sampling techniques and key groundwater parameters were reviewed to confirm natural attenuation processes had been enhanced and were active
We concluded the site did not pose a potential risk to identified receptors and was suitable for ongoing commercial use.