A worker enters an excavation where a hazardous atmosphere could reasonably exist. What should be done before entry?
Correct Answer
C) Test and control the atmosphere as required before entry.
Potential hazardous atmospheres in excavations require appropriate testing and controls before employee entry.
Why This Is the Correct Answer
Potential hazardous atmospheres in excavations require appropriate testing and controls before employee entry.
Why the Other Options Are Wrong
Option A: Rely on smell only.
Rely on smell only. may relate to another site control, but it does not remove or guard the excavation safety exposure being tested.
Option B: Enter quickly before vapors collect.
Enter quickly before vapors collect. may relate to another site control, but it does not remove or guard the excavation safety exposure being tested.
Option D: Skip checks if the trench is less than 8 feet deep and work is brief.
Skip checks if the trench is less than 8 feet deep and work is brief. may relate to another site control, but it does not remove or guard the excavation safety exposure being tested.
Memory Technique
If Working Near can still reach the worker, the control is decoration.
Reference Hint
Study anchor (closed-book): memorize Excavation safety from Cal/OSHA Title 8 Construction Safety Orders; CSLB Law and Business. / Title 8 excavation hazardous atmosphere requirements; know the rule or calculation trigger without relying on exam-room lookup.
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