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Under OSHA 1926.651(g)(1)(i), when must the atmosphere be tested before employees enter an excavation more than 4 feet deep?

Correct Answer

A) When a hazardous atmosphere could be expected

Section 1926.651(g)(1)(i) requires pre-entry testing under the stated depth and hazard conditions. This is distinct from the 4-feet-or-more egress rule; shallower excavations are not exempt from other atmospheric safety duties. Source: https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.651

Answer Options
A
When a hazardous atmosphere could be expected
B
After backfill
C
During lunch breaks
D
Never in construction excavations

Why This Is the Correct Answer

Section 1926.651(g)(1)(i) requires pre-entry testing under the stated depth and hazard conditions. This is distinct from the 4-feet-or-more egress rule; shallower excavations are not exempt from other atmospheric safety duties. Source: https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.651

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