Presented with some interesting challenges,Senoko Tank Oil Fuel Depot successfully upgraded the secondary containment system, for the Defence Infrastructure Organisation (DIO), at the Senoko Energy strategic oil fuel depot in Singapore. The UK’s Defence Infrastructure Organisation (DIO), part of the Ministry of Defence, is responsible for the management and maintenance of the Senoko Oil Fuel Depot infrastructure, and is inspected under the Major Accident Control Regulations (MACR). A 2018 inspection identified several non-conformances in the secondary containment system resulting in the issuing of an improvement notice. Because of the short time scale, DIO opted for a negotiated contract with Trant Engineering, with whom they have a long-standing relationship. The £12.3m contract was awarded in December 2018 .