What is Confined Space "Entry"?
A confined space entry is considered to have occurred when any part of a person's body crosses the plane of an opening into the space.
Each employer should ask two questions at the onset of each project:
- Is confined space entry always necessary for this task?
- Is it possible to complete the task from the outside?
If a workplace contains permit spaces, the employer must inform exposed employees of their existence, location and the hazards they pose.
If possible, avoid entering a confined space. Every consideration should be given to completing the task from the outside.
Hazard Identification Procedures
If employees must enter a confined space, initial testing for confined space hazards must occur before entry and continued testing, and monitoring must occur while work is conducted within the confined space.
O-F-T Testing
Before entry into a confined space, a qualified person must perform appropriate testing for atmospheric hazards in this sequence: oxygen, combustible gases or vapors, and toxic gases or vapors.
Always test for atmospheric hazards in the order listed below:
- O - oxygen deficiency, enrichment or displacement
- F - flammable or explosive atmospheres
- T - toxic or corrosive atmospheres
Remember "O-F-T" and you can't go wrong. We'll cover more about atmospheric and non-atmospheric confined space hazards in upcoming modules.
Knowledge Check Choose the best answer for the question.
1-6. What is the correct sequence when testing for atmospheric hazards within confined spaces?
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