Confined Space Entry Awareness

A confined space doesn't have to look dangerous to be lethal. Manholes, vaults, tanks, and pits can build up an atmosphere with too little oxygen or too much of a hazardous gas — invisible, odorless, and capable of causing loss of consciousness in a single breath. It's one of the few hazards where a rescuer who rushes in without protection often becomes a second victim.

That's exactly why a permit-required confined space isn't something to enter based on how it looks or how quick the job seems.

Key points

• Never enter a permit-required confined space without a completed permit, atmospheric testing, and an attendant stationed outside.
• Atmospheric testing has to happen before entry and continue throughout the work — conditions can change while someone's inside.
• The attendant's job is to monitor from outside and call for help — never to enter the space themselves if something goes wrong.
• Ventilate the space as required before and during entry, not just when it "smells off."
• Know the rescue plan before entry begins. Non-entry rescue (retrieval lines and equipment) should always be the first option.
• If you're not trained and authorized for this specific space, you don't enter it — full stop.

Discussion questions

• Do we know which spaces on this site are classified as permit-required confined spaces?
• Has everyone been trained on their specific role — entrant, attendant, or supervisor — for confined space work?
• Do we know where the rescue equipment is staged, and who's trained to use it?