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Part 9 Confined Spaces
Standby Persons
9.34 Low hazard atmosphere
If a worker enters a confined space which contains a low hazard atmosphere
(a) another worker must be assigned as a standby person,
(b) there must be a continuous means of summoning the standby person,
(c) the standby person must check on the well-being of workers inside the space at least every 20 minutes, and
(d) the standby person must have a means to immediately summon rescue personnel.
9.35 Moderate hazard atmosphere
If a worker enters a confined space which contains a moderate hazard atmosphere
(a) another worker or workers must be assigned as the standby person(s),
(b) a standby person must be stationed at or near the entrance to the space,
(c) the standby person must visually observe or otherwise check the well-being of the worker(s) inside the space, as often as may be required by the nature of the work to be performed, but at least every 20 minutes,
(d) there must be a continuous means of summoning the standby person from inside the space, and
(e) the standby person must have a means to immediately summon rescue personnel.
9.36 High hazard atmosphere, engulfment or entrapment
If a worker enters a confined space which contains a high hazard atmosphere, a risk of engulfment or entrapment or with any other recognized serious health or safety hazard
(a) another worker or workers must be assigned as the standby person(s),
(b) the standby person(s) must be stationed at the entrance to the space and must continuously attend to the standby duties,
(c) the standby person(s) must visually observe or otherwise continuously monitor the well-being of the worker(s) inside the space,
(d) there must be a continuous means of summoning the standby person(s) from inside the space,
(e) the standby person(s) must be equipped and capable of immediately effecting rescue using lifting equipment if required, or otherwise performing the duties of rescue persons, and
(f) the standby person(s) must prevent the entanglement of lifelines and other equipment.
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