Following this 3,300 sqm of walls and floors of the tunnels and basements were environmentally cleaned to remove dust or debris and encapsulated. Seals were installed to close any openings to ancillary corridors and unsealed brickwork surfaces were encapsulated with ET150 sealant. All operatives had confined-space training and enhanced air-management was used during removal operations to mitigate heat-stress with damaged insulation to steam pipes being the first items for repair.
As Principal Contractor, Clifford Devlin was responsible for managing and implementing service isolations and disconnections which were planned in liaison with the Hospital's Facilities Department. The works were conducted while the Hospital remained fully operational at all times.
A central compound was created to locate our decontamination units, lockable skip, welfare facilities and vehicles. Transit routes to allow our operatives to access the underground ducts via the various ground level access points were planned and agreed in advance with the Facilities Team always maintaining operations outside the operational clinical areas of the hospital.