Bund

A self-containment feature, which is like a large tray at the base of an entire storage facility, or a tray on which sits one or a few containers. The bund helps to prevent the leakage of oils, fuels, pesticides or chemicals from damaged or spilt containers from contaminating the environment outside of the bunded area. A bunded facility should be able to contain at least 110% of the volume of the largest container, or 25% of the maximum volume of all containers stored material, whichever is the larger, within the store.