To protect the hangars from fire damage, a dual system is being used. In addition to a conventional sprinkler system, the aircraft parking and maintenance areas will be equipped with an instantaneous foam deluge system. In the event of a fire, the multi-layers of fire suppression do not rely on a conventional single source of water supply. The city hydrant system is fully supplemented by an onsite underground water storage tank containing approximately 1.2 million litres of water. The hangars have been designed to exceed current energy efficiency standards. Stormwater management has also been factored into the design. Instead of rain and stormwater flowing directly into and over-stressing city mains, two 173,000-litre underground tanks are being installed to capture excess runoff.