Definition | Types | Typical | Potential | Requirements | Considerations |
Permitting Services:
Air Quality - Confined Spaces

Definition

A confined space is any work area having a limited or restricted means of entry or exit, large enough and configured so that an employee can physically enter and perform assigned activities, but not designed for continuous employee occupancy.


Types of Hazards

  • Accumulation of toxic or flammable contaminants

  • Physical hazards

  • Oxygen deficient atmospheres

"Typical" Confined Spaces

  • Storage tanks

  • Ventilation or exhaust ducting

  • Sewers

  • Process vessels

  • Bins

  • Boilers

  • Tunnels

  • Pipeline

  • Underground utility vaults

  • Other open top spaces more than four feet in depth

Potential for Hazard

  • Falls

  • Burns

  • Drowning

  • Asphyxiation

  • Engulfment

  • Toxic Exposure

  • Electrocution

  • Death

Entry Permit Requirements

A confined space entry permit defines the series of steps the entry team must follow to ensure the safe entry, conduct of work, and exit from the designated confined space. The main component is the evaluation and recording of various potential hazards.


Considerations in Evaluation

  • The breathing atmosphere of the work place

  • The potential electrical, hydraulic or pneumatic hazards

  • The prevention tools available, such as explosion proof lighting, non-sparking tools, etc.

  • Equipment and facilities outside the space to support a rescue


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