Working in a confined space can expose a person to a very risky situation that can cause diseases and
injury which leads to an accident and death. Statistics have shown many fatalities involving workers
working in a confined space such as working in a silo, storage tank, pressure vessel or tank, sewer system
or communication system, trenches and others. In most cases the cause of death is due to inhaling of toxic
gases or oxygen deficiency.
Investigations conducted by the Department of Occupational Safety and Health (DOSH) have found that
most confined space accident were due to failure of the employer in establishing and providing a safe work
system for working in a confined space. Another factor is due to lack of coordination and control of activities
when executing more than one task at the same time. For example, working in a confined space can be
hazardous when maintenance work on a piping system containing flammable substances connected to the
confined space is done without proper coordination and control.
DOSH also noticed that one of the main reasons for these accidents is the sub-contacting of work to
contractors that do not have knowledge and experience in working in a confined space. These contractors
normally do not have proper work procedures and equipment for working in a confined space.
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