Proper Ventilation Considerations
Initially determine:
- number and size of openings
- volume and configuration of the space to be entered
- capacity and positioning of the ventilation equipment to be used
- existing and potential atmospheric hazards
After beginning ventilation:
- Routinely test the confined space until levels stabilize at acceptable entry conditions.
Once entry and work start:
- Continue ventilation and frequent atmospheric testing for the entire duration of entry.
- Consider atmospheric hazards created by work in the space.
Knowledge Check Choose the best answer for the question.
6-4. When is ventilation required for work in a confined space?
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