Distribution Terminal, Exeter

The contamination arose as the result of a fuel loss from a UST. The impacted area of 9,000 sq m was located within a distribution yard.

The UST and associated pipe work were removed together with the most heavily contaminated soils.

Forty multi phase abstraction wells were installed on grid basis across the area of contamination. The installation works were scheduled in order to maintain 24 hour access to the distribution warehouse.

Recovery of free product proceeded in parallel with groundwater treatment and the remediation of the residual soil contamination.

Groundwater was treated on site to remove suspended solids and free phase/dissolved hydrocarbons prior to discharge to sewer under the terms of a trade discharge consent.

Client
International Logistics Network Company. 

Site
Exeter. 

Problem
Contamination of soil and groundwater by diesel range organics. 

Technologies utilised
Multi Phase Extraction, Vapour and Liquid Phase GAC Absorption, Phase Separation, Suspended Solids Removal.

Remediation criteria
VOC’s < 50ppm, Groundwater TPH <17 mg/l, Soil TPH < 2,400mg/kg, Removal of Free Phase < 1.3mm

Validation
Project overseen and validated by an independent consultant.