Significant petroleum hydrocarbon (TPH) contamination was discovered during the redevelopment of a former manor house into a block of residential properties. The TPH contamination was the result of leaks from a heating-oil tank, which resulted in free- and dissolved phase contamination in the soils and groundwater underneath the properties onsite.

Although the tank had been removed during the redevelopment, further remedial works were required in order to protect the occupants of the properties and prevent offsite migration.