Key Questions
The following key questions are answered in this module:
What is a confined space?
A confined space is defined as an area that has sufficient space for a person to enter and perform work, has limited or restricted means for entry or exit, and is not designed for continuous occupancy.
What is a permit required confined space?
A permit required confined space is a space that contains or has the potential to contain a hazardous atmosphere, contains material that has the potential to engulf an entrant, has converging walls or tapered floors, or any other safety or health hazard.
What is a hazardous atmosphere?
A hazardous atmosphere is one that contains flammable gases or vapors in excess of 10% of the lower explosive limit (LEL), airborne combustible dust at a concentration that exceeds the LEL, oxygen concentration below 19.5% or above 23.5%, concentration of any hazardous substance above its permissible exposure limit (PEL), or any other condition that is immediately dangerous to life or health.
Can an entry supervisor enter a confined space?
Yes, entry supervisors can be an authorized entrant as long as they are trained and equipped to do so.
Is a rescue team required to be on site?
A confined space rescue team does not have to be on site if they are capable of responding in a timely manner based on the hazards present. If the space has an IDLH atmosphere, a rescuer must be located outside the confined space and capable of immediate action.