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An excavation is 5 ft deep beside a former fuel line, and a hazardous atmosphere could reasonably exist. What atmospheric check is required before employees enter?

Correct Answer

B) The atmosphere must be tested before entry when the excavation is over 4 ft deep and a hazardous atmosphere could reasonably be expected

OSHA 1926.651(g)(1)(ii) requires testing before employees enter excavations greater than 4 ft deep where oxygen deficiency or a hazardous atmosphere exists or could reasonably be expected to exist. Other choices wait too long or use the wrong depth trigger.

Answer Options
A
Assume no atmosphere test is needed if workers can smell fuel
B
The atmosphere must be tested before entry when the excavation is over 4 ft deep and a hazardous atmosphere could reasonably be expected
C
Testing is required only for excavations deeper than 20 ft
D
Testing may wait until the first employee reports symptoms

Why This Is the Correct Answer

OSHA 1926.651(g)(1)(ii) requires testing before employees enter excavations greater than 4 ft deep where oxygen deficiency or a hazardous atmosphere exists or could reasonably be expected to exist. Other choices wait too long or use the wrong depth trigger.

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