A worker discovers an unexpected underground storage tank while excavating. The space appears to have limited entry and exit points and is not designed for continuous occupancy. What must be done before any worker enters this space?
Correct Answer
A) Test the atmosphere, obtain entry permits, and follow confined space procedures
This describes a confined space that requires atmospheric testing, proper permits, and adherence to confined space entry procedures before anyone can safely enter. OSHA requires these safety measures to prevent serious injuries or fatalities.
Why This Is the Correct Answer
Option B is correct because an underground storage tank with limited entry/exit points and not designed for continuous occupancy meets OSHA's definition of a confined space. OSHA 29 CFR 1926.95 requires atmospheric testing for oxygen levels, flammable gases, and toxic substances before entry. Written entry permits must be obtained and confined space procedures followed, including having an attendant outside, emergency rescue procedures, and proper ventilation. These requirements exist because confined spaces can contain deadly atmospheric hazards that have killed many workers.
Why the Other Options Are Wrong
Option B: Mark the area and continue work around it
While ventilation is part of confined space safety, installing fans alone without atmospheric testing and proper permits is insufficient and dangerous - workers could still be exposed to deadly gases or oxygen-deficient atmospheres.
Option D: Provide adequate lighting and proceed with normal work
Simply providing lighting ignores the serious atmospheric hazards that may be present in confined spaces, such as toxic gases, oxygen deficiency, or explosive vapors that could kill workers instantly.
Memory Technique
Think 'Underground = Dangerous Ground' - any underground space discovery requires full confined space protocols before entry, never assume it's safe to enter.
Reference Hint
OSHA 29 CFR 1926.95 - Personal Protective Equipment, and 29 CFR 1910.146 - Permit-Required Confined Spaces (often referenced in construction standards)
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