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.
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.