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Maritime Occupational Health and Safety Regulations

Version of section 174 from 2010-06-03 to 2019-06-24:

  •  (1) If a hazardous substance may be produced in a confined space by the work to be performed,

    • (a) the confined space must be ventilated in accordance with subsection (2); or

    • (b) each person granted access to the confined space must use a respiratory protective device or breathing apparatus referred to in section 142.

  • (2) If an airborne hazardous substance or oxygen in the atmosphere in a confined space is maintained at the value, level or percentage referred to in subsection 172(2) by the use of ventilation equipment, a person may only be granted access to the confined space if

    • (a) the ventilation equipment is

      • (i) equipped with an alarm that will, if the equipment fails, be activated automatically and be audible or visible to any person in the confined space, or

      • (ii) monitored by an employee who is in constant attendance at the equipment and in communication with any person in the confined space; and

    • (b) in the event of failure of the ventilation equipment, sufficient time will be available for the person to escape from the confined space before one of the following occurs:

      • (i) their exposure to or the concentration of a hazardous substance in the confined space is more than the value, level or percentage prescribed in paragraph 172(2)(a) or (b), and

      • (ii) the percentage of oxygen in the atmosphere ceases to meet the requirements of paragraph 172(2)(c).

  • (3) The employee referred to in subparagraph (2)(a)(ii) must activate an alarm in the event of faulty operation of the ventilation equipment.

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