The IBC containment unit is intended to capture an ignitable liquid release from a composite IBC. The unit contains the fuel spill allowing the liquid or burning liquid to drop through a flame arrestor and deposit into a holding tank. The holding tank has a capacity of 150% of the composite IBC that it is designed for. The IBC containment unit is offered with sides up or sides down, offering two convenient options for installation. In addition to its installation benefits, the IBC containment units also offer: