Case Study - Remediation works at a Covid testing centre at a UK international airport
Background
During fuelling of a generator-set, a spillage of diesel occurred onto a region of tarmac and grass. It was estimated that approximately 180 litres of diesel was released to ground.
The spillage caused the closure of an assisted testing lane at the Covid testing centre and a subsequent reduction in the overall testing capacity. The spill led to staining and damage of the tarmac surface, dieback of grass and a potential risk to the site drainage system. The site was also located on a Principal Aquifer.
Planning & Management
A specialist utility contractor was instructed by OEE to complete a detailed survey of the work area which included the use of ground penetrating radar. It was identified that an electric cable forming part of a taxiway lighting circuit was located within the required excavation area.
Oracle liaised closely with the client and the airport to ensure that the works would not interrupt the operation of the taxiway and runway and to ensure the correct permits and control measures were put in place.
It was determined that the works would require isolation of the electric cable and would need to be undertaken overnight.
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Outcome
OEE worked closely with the airport engineering department to ensure the safe isolation of the required cable and completed the remedial works over a period of 3 nights. The works involved the excavation and removal of 35 tonnes of diesel contaminated soil and tarmac. All works were supervised and validated by an Oracle Consultant holding the CITB SMSTS qualification.
The excavation and tarmac were reinstated in accordance with the airport specifications and allowed the Covid testing centre to return to full capacity.