SafetyQuestion 1263 of 1605
Before entering a trench more than 4 feet deep where a hazardous atmosphere could exist (e.g., near landfill or sewer), the employer must:
a.Simply open the trench for a few minutes
b.Test the atmosphere for oxygen deficiency and hazardous gases and provide controls as needed
c.Rely on workers' sense of smell
d.Ignore the atmosphere below 10 feet
Explanation
1926.651(g) requires atmospheric testing in excavations over 4 feet deep where oxygen deficiency or hazardous/flammable atmospheres could reasonably exist, with adequate ventilation or respiratory protection provided.
Law Reference: 29 CFR 1926.651(g)Practice all 1605 questions free — no signup required.
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Reviewed by Abraham Chen — Licensed California General Contractor (CSLB License #1101856 — verify)