A confined space has been tested and shows 23% oxygen, 0% combustible gases, and no toxic substances. The space also has the potential for engulfment. What classification should this space receive?
Correct Answer
B) Permit-required confined space
Even though atmospheric conditions are acceptable, the potential for engulfment makes this a permit-required confined space. Any space with recognized serious safety or health hazards requires a permit entry system.
Why This Is the Correct Answer
A permit-required confined space is defined by OSHA as any confined space that has one or more of four specific hazards, including the potential for engulfment. Even though the atmospheric conditions are within acceptable ranges (oxygen between 19.5-23.5%, no combustible gases, no toxic substances), the presence of any single qualifying hazard is sufficient to require permit entry procedures. The potential for engulfment alone makes this space permit-required, regardless of acceptable atmospheric conditions.
Why the Other Options Are Wrong
Option A: Restricted access space
Restricted access space is not a standard OSHA classification for confined spaces. OSHA only recognizes confined spaces as either permit-required or non-permit required.
Option D: Standard workspace
A standard workspace cannot be a confined space by definition. Confined spaces have limited entry/exit means and are not designed for continuous occupancy, which disqualifies them from being standard workspaces.
Memory Technique
Use 'PACE' - Permit required if ANY of: Physical hazards (engulfment), Atmospheric hazards, Configuration hazards, or other Existing serious hazards are present
Reference Hint
OSHA 29 CFR 1926.95 - Personal Protective Equipment, and confined space entry procedures in safety management chapters
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