Envirotreat

Smith street case study

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Courtesy of Envirotreat

The Smith Street site is situated in Scunthorpe, Lincolnshire. Historically, the site had been utilised as a commercial vehicle sales centre and repair garage. These activities featured fuel pumps with associated under and above ground storage tanks.

At some point, there was believed to have been a release of fuel from one of the above ground storage tanks. The contamination encountered was attributed to the previously mentioned activities and included, Total Petroleum Hydrocarbons (TPH) and Polycyclic Aromatic Hydrocarbons (PAH). Envirotreat proposed both bioremediation and
advanced stabilisation / solidifi cation (using E-Clay® Technology) as effective remediation strategies.

Objective

The overall remediation strategy was designed to address the source and indirectly the pathway contamination issues in order to protect the identified groundwater and human health receptors. The remedial operation involved the ex-situ bioremediation treatment of the identified contaminants of concern to the agreed Site Specific Target Levels (SSTL), which are summarised in Table 1. The SSTL were derived based on a sitespecific risk assessment approach.

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