What is a Permit Required Confined Space?
1. It contains or has a potential to contain a hazardous atmosphere;
2. It contains a material that has the potential for engulfing an entrant;
3. It 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; or
4. It contains any other recognized serious safety or health hazard.