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AhaBulb: Stuff Everyone Should Know · ahabulb.com/osha-confined-space-testing

When testing the air in a permit space, what must you test for first?

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  1. Oxygen
  2. Toxic gases
  3. Combustible gases

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References

  1. 29 CFR 1910.146 Permit-required confined spaces www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-J/section-1910.146 Checked 2026-10-10.

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