The 1.7 hectare former PD Fuels Depot at Tipner formed part of the 44 hectare Tipner Regeneration Project that would transform the geographical area and provide a new gateway to Portsmouth. The site was located in a sensitive busy residential area adjacent to Tipner Lake, an SPA, Ramsar Site and SSSI designated tidal water body interconnected with Portsmouth Harbour. The site was heavily contaminated with a range of pollutants including TPH, PAH, SVOCs/VOCs and asbestos due to historic industry including a fuel depot, tar works and timber yard leaving the site contaminated.
Cognition was contracted by SEEDA to remediate site soils and groundwater in order to reduce the health risk to future residents. The key elements of these works included;
Cognition processed 80,000m3 of soil with 30,000m3 successfully bioremediated to meet the agreed re-use criteria and backfilled. Other remediation techniques such as groundwater treatment and a PRB were employed on the site to aid remediation. Treatment and re-use delivered significant savings over conventional disposal, as well as other benefits such as reducing site traffic and disruption in the local area.