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Confined Space

Before any work can begin in a confined space, a detailed Confined Space Entry Permit and written entry plan must be prepared and approved by the safety department. This process will help determine whether the space is a “Confined space” or a “Permit Required” confined space. All confined spaces shall be considered “Permit Required” unless we can prove otherwise. Refer to OSHA 29 CFR 1910.146.


By definition, a confined space must meet all of the following criteria: Any space large enough and so configured that a person can bodily enter and perform work; has limited openings for entry and exit; and was not designed for continuous human occupancy. Depending on the hazards, and if the hazards can be controlled, entry into these types of spaces may also use an “Alternate Entry” confined space entry. A “Permit Required” space meets the above criteria and has a potentially uncontrollable hazard.


“Permit Required” confined spaces may include, but are not limited to:

  • Storage tanks

  • Underground vaults and utility tunnels

  • Excavations and trenches

  • Pipelines

  • Ventilation and exhaust ducts

  • Pits and tubs

  • Sewers

  • Manholes

  • Open top spaces more than four feet in depth

  • Elevator shafts

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Before working in any confined space, a competent person will determine the type of space, and what hazards exist. Any operating system or equipment will be locked out and tagged to prevent accidental operation. Contact the operating facility representative prior to any confined space entry work.


Prior to workers entering a “Permit Required” confined space, the atmosphere must be tested and a permit completed and authorized. The atmosphere will be tested for oxygen deficiency, toxic gases or vapors, and combustible or flammable gases or vapors according to the hazard analysis and/or information provided by the client.


Contents of the Confined Space Entry Plan:

  • Space evaluation - Known hazards in the confined space

  • Written program with emergency procedures in case of an emergency

  • Training Rescue (non-entry retrieval) Rescue (unable to self-rescue)

  • Correct use of personal protective equipment when required

  • Monitoring equipment/Atmosphere testing requirements

  • Lockout/Tag out procedures

  • Fall protection if required

  • Permit records

  • Maintain exposure records


Questions or concerns regarding confined spaces should be immediately referred to
your Supervisor and/or the Safety Department.

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