The Project


A leaking fuel line beneath a petrol station forecourt resulted in 1,000 litres of petrol contaminating groundwater and emerging into an adjacent river. Following clean-up of the river, remediation of the groundwater was required to mitigate the residual risks to the watercourse.

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The Solution


Ground investigation work had been undertaken prior to Adler and Allan involvement, the results of which had been used to generate some stringent remedial targets, resulting in an estimated remediation cost of £140k. A&A staff were engaged to assess the remedial targets and the proposed solution to determine whether an alternative solution could be found.

Additional ground investigation, risk assessment and monitoring were undertaken, which demonstrated that risks to the nearby river were negligible and led to successful re-evaluation of the remedial targets. A free product recovery system was installed and operated for a period of ten months, with a further month of rebound trials. A&A was able to agree completion ahead of schedule and with a significant cost saving. Post-completion monitoring verified the Conceptual Site Model and Risk Assessment.

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The Outcome


A verification report was issued in Spring 2010 demonstrating completion of the works to our client’s satisfaction. A Remediation Statement was subsequently submitted and approved by regulators.