Permit-required confined space (permit space)
A confined space that has one or more of the following characteristics:1. Contains or has a potential to contain a hazardous atmosphere;2. Contains a material that has the potential for engulfing an entrant;3. Has an internal configuration such that an entrant could be trapped or asphyxiated by inwardly converging walls or by a floor which slopes downward and tapers to a smaller cross-section; or4. Contains any other recognized serious safety or health hazard.
