The hazards encountered and associated with entering and working in
confined spaces are capable of causing bodily injury, illness, and death
to the worker.
Accidents occur among workers because of failure to recognize that a
confined space is a potential hazard. It should, therefore, be considered
that the most unfavorable situation exists in every case and that the
danger of explosion, poisoning, and asphyxiation will be present at the
onset of entry.
Many hazardous conditions are possible and include: Hazardous Atmospheres
(flammable, toxic, irritant, and asphyxiating), and General Safety Hazards
(mechanical, communications, entry and exit, and physical).