The challenge The site, a former petrol station in Wolverhampton, suffered a 4000 litre unleaded fuel leak from one of its underground tanks. Due to delays in the sale of the site, GRM were not enlisted to investigate and remediate the problem until almost two years after the leak was first reported. As the site was underlain by a major aquifer, the consequences of the leak had severely worsened with time. Following initial investigation and analysis, GRM discovered that the plume had migrated approximately 100m down gradient. Consequently, GRM and their client had to consider liabilities with regards to neighbouring properties. GRM undertook a Detailed Quantitative Risk Assessment (DQRA) to assess the risk that the contamination posed to human health and controlled waters. The DQRA involv

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