Controlling Confined Space Hazards
Introduction
Once hazards are identified, it is critical to institute appropriate control measures to eliminate or, if not possible, reduce and control confined space hazards. This module discusses the "Hierarchy of Controls" strategies to control confined space hazards.
The moment of entry is critical in confined or enclosed space operations. Injuries from fires, explosions, falls, and unsafe atmospheres may be avoided with careful preparation and adequate testing. Remember, acceptable entry conditions must be attained before entry and those safe conditions must be maintained throughout the duration of an entry. This module also explains some of the procedures and precautions that should be in place to safeguard entrants while they are working in the confined space.
Confined Space Hazard Controls
Elimination
The highest priority in controlling hazards in confined spaces should be given to the attempt to totally eliminate the hazard so that entry will be completely safe. That's not possible in many situations, but the attempt should still be considered. For instance, if there is a hazardous atmosphere in the confined space, forced-air ventilation of the space might be the answer to completely eliminate the hazard.
Substitution
If elimination is not possible, it may be acceptable to replace toxic substances with less toxic or non-toxic substances so that hazardous atmospheres are not created. One primary control measure effective in preventing toxic hazardous atmospheres from developing in the first place is the use of less toxic products that vaporize less readily. Keep less of the product at the site and keep containers closed inside the confined space at all times.
Knowledge Check Choose the best answer for the question.
6-1. Which of the following should be considered the top priority in the Hierarchy of Control strategies?
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