Confined Space Entry — Permit & Plan

Talking Points

1. 1 A confined space permit is MANDATORY before entry — no exceptions
2. 2 Atmosphere testing required before entry: oxygen (19.5-23.5%), flammable gases (<5% LEL), toxic gases (CO <10ppm, H2S <5ppm)
3. 3 Always test from outside using extended probe — do not lean into the space
4. 4 Test continuously throughout work — conditions can change (stagnant air, disturbed sediments)
5. 5 Continuous ventilation required — mechanical exhaust preferred over natural ventilation
6. 6 Attendant must maintain communication and be stationed outside at all times — never leave attendant alone
7. 7 Rescuer must have full PPE and be trained in confined space rescue — never enter without independent escape equipment
8. 8 Know the emergency response procedure before you enter — do not just read it after

Control Measures

• Confined space entry permit system with tag-in/tag-out register
• Gas detection equipment calibrated and pre-checked before use
• Mechanical ventilation running continuously — confirm air movement at worker's breathing zone
• Rescue equipment on standby (tripod, harness, lifeline, SCBA if required)
• Attendant trained in monitoring, communication, and emergency initiation — has no other duties during entry