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S-2.1, r. 4 - Safety Code for the construction industry
Section 9.5.4
Disposition versions
9.5.4. (Revoked).
9.5.4. Lock tender:
(1) The employer shall entrust to a competent worker the operation of valves and pressure gauges which regulate and indicate the air pressure in the working chamber. Such worker shall work not more than 9 hours in a 24-hour period. In caisson works, such worker shall not be required to operate more than 2 separate air supplies.
(2) Any working chamber shall be equipped with a recording pressure gauge and with a needle dial pressure gauge which shall at all times indicate the actual pressure in the working chamber. Such pressure gauges shall be installed in full view of the lock tender.
(3) While persons are under compressed air, the employer shall make sure that there is another qualified person available on the site to perform the duties of a lock tender in an emergency.
