jswizzle3737/ontario_laws_and_regs huggingface dataset:
325. (1) Every device, other than a portable hand-operated device, used for firing a charge shall meet the requirements of this section. O. Reg. 213/91, s. 325 (1). (2) No person other than a competent worker shall use a device used for firing a charge. O. Reg. 213/91, s. 325 (2). (3) A device used for firing a charge shall have a switch mechanism that automatically returns by gravity to the open position. O. Reg. 213/91, s. 325 (3). (4) The live side of a device used for firing a charge shall be installed in a fixed locked box which is accessible only to the worker doing the blasting. O. Reg. 213/91, s. 325 (4). (5) The lock on the box referred to in subsection (4) shall be able to be closed only when the contacts of the device are open and a short-circuiting device is in place. O. Reg. 213/91, s. 325 (5). (6) The leads to the face shall be short-circuited when the contacts of the device are in the open position. O. Reg. 213/91, s. 325 (6).
326. (1) A circuit used for blasting shall originate from an isolated ungrounded power source and shall be used only for blasting. O. Reg. 213/91, s. 326 (1). (2) Subsection (1) does not apply with respect to blasting done with a portable hand-operated device. O. Reg. 213/91, s. 326 (2).
327. (1) When a charge is fired and after a shot is heard, every worker in a place of refuge from a blast shall remain there and not return to the blast area for at least ten minutes. O. Reg. 213/91, s. 327 (1). (2) If a charge is fired and no shot is heard, before the circuit is repaired, (a) the blasting circuit shall be locked in the open position; and (b) the lead wires shall be short-circuited. O. Reg. 213/91, s. 327 (2). (3) A worker who suspects a misfire of an explosive or a blasting agent shall report it to the supervisor in charge of the project. O. Reg. 213/91, s. 327 (3). (4) A charge of an explosive or a blasting agent that has misfired shall be left in place and blasted as soon as it is discovered. O. Reg. 213/91, s. 327 (4).
328. When a blasting operation is completed, the blasting switch shall be locked in the open position, the lead wires short-circuited and the blasting box locked. O. Reg. 213/91, s. 328. Ventilation
329. An adequate supply of fresh air shall be provided and circulated throughout an underground work place. O. Reg. 213/91, s. 329.
330. (1) An underground work place shall be tested regularly for noxious or toxic gases, fumes or dust. O. Reg. 213/91, s. 330 (1). (2) A competent worker shall regularly test the air and the mechanical ventilation for an underground work place to ensure that the mechanical ventilation is adequate. O. Reg. 213/91, s. 330 (2). (3) When the results of the tests referred to in subsection (2) indicate there is a need for respiratory protective equipment, the employer shall provide respiratory protective equipment. O. Reg. 213/91, s. 330 (3).
331. (1) Mechanical ventilation shall be provided in a shaft in which an internal combustion engine or other device which emits a noxious gas or fume operates. O. Reg. 213/91, s. 331 (1). (2) Subsection (1) does not apply if the noxious gas or fume is discharged outside the shaft in such a way that its return to the shaft is prevented. O. Reg. 213/91, s. 331 (2). PART V   WORK IN COMPRESSED AIR Interpretation and Application
332. In this Part, “air lock” means a chamber designed for the passage of persons or materials from one place to another place that has a different air pressure from the first; (“sas”) “compressed air” means air whose pressure is mechanically raised to more than atmospheric pressure; (“air comprimé”) “decompression sickness”, in relation to a worker, means a condition of bodily malfunction caused by a change from a higher to a lower air pressure and includes the condition commonly known as “the bends”; (“mal de décompression”) “kilopascals”, except in section 376, means kilopascals relative to atmospheric pressure; (“kilopascals”) “maximum air pressure”, in relation to a worker, means the greatest level of air pressure to which a worker is subjected for a period of more than five minutes; (“pression d’air maximale”) “medical lock” means a chamber in which workers may be subjected to changes in air pressure for medical purposes; (“caisson de décompression”) “superintendent” means the person appointed by a constructor to be supervisor over and in charge of work done in compressed air; (“surintendant”) “work chamber” means a part of a project that is used for work in compressed air but does not include an air lock or a medical lock. (“chambre de travail”) O. Reg. 213/91, s. 332.
333. This Part applies with respect to work done in compressed air, other than work done in diving bells or work done by divers. O. Reg. 213/91, s. 333. General Requirements
334. (1) No constructor or employer shall begin work at a project where a worker may be subjected to compressed air until the requirements of this section are met. O. Reg. 213/91, s. 334 (1). (2) The employer of workers who may be subjected to compressed air at a project shall give a Director written notice of the intended use of compressed air on the project at least fourteen days before beginning work on the project. O. Reg. 213/91, s. 334 (2); O. Reg. 145/00, s. 37 (1). (3) Before work is begun in compressed air, the employer shall obtain written permission from a Director. O. Reg. 213/91, s. 334 (3); O. Reg. 145/00, s. 37 (2).
335. (1) Before work is begun in compressed air at a project, a constructor shall give written notice, (a) to the local police department and the fire department and public hospital nearest to the project; and (b) to a Director, together with the names and addresses of those to whom notice is given under clause (a). O. Reg. 213/91, s. 335 (1); O. Reg. 145/00, s. 38. (2) A notice shall set out, (a) the location of the project; (b) the name, address and telephone number of the project physician and the superintendent; and (c) the location of a medical lock for the project and of every other readily-available medical lock. O. Reg. 213/91, s. 335 (2). (3) The employer shall give notice of the completion of work in compressed air at the project to those who were given notice under clause (1) (a). O. Reg. 213/91, s. 335 (3).
336. (1) The employer shall appoint a competent person as superintendent of all work in compressed air at a project. O. Reg. 213/91, s. 336 (1). (2) The superintendent, before a worker is first subjected to compressed air, (a) shall ensure that the worker is fully instructed, (i) in the hazards of working in compressed air, and (ii) in the measures to be taken to safeguard the health and safety of the worker and other workers on the project; and (b) shall obtain an acknowledgement signed by the worker who is receiving the instruction stating that the worker has been so instructed. O. Reg. 213/91, s. 336 (2).
337. (1) A superintendent at a project shall designate for each shift at least one competent worker as lock tender who shall attend to the controls of an air lock. O. Reg. 213/91, s. 337 (1). (2) A lock tender must be able to speak, read and write English competently. O. Reg. 213/91, s. 337 (2). (3) A superintendent at a project shall ensure that at least one competent worker in addition to the lock tender is available in an emergency to perform the duties of the lock tender while a worker is working in compressed air. O. Reg. 213/91, s. 337 (3).
338. (1) The superintendent shall keep available at a project for inspection by an inspector, (a) a copy of each form described in clause 352 (1) (b) prepared by the project physician; (b) all records required under section 373 of air pressure in air locks on the project; and (c) all records required under section 394 to be kept by a lock tender. O. Reg. 213/91, s. 338 (1); O. Reg. 64/18, s. 2 (1). (2)  When work in compressed air at the project is finished, the superintendent shall promptly send to a Director a copy of each form described in clause 352 (1) (b) prepared by the project physician. O. Reg. 64/18, s. 2 (2).
339. (1) A worker who works in compressed air shall wear for at least twenty-four hours after working in compressed air a sturdy metal or plastic badge that meets the requirements of subsection (2). O. Reg. 213/91, s. 339 (1). (2) A badge shall measure at least fifty millimetres in diameter and shall set out, (a) the name of the constructor of the project; (b) the name and telephone number of the project physician; (c) the location of a medical lock at the project; and (d) the words, “compressed air worker – in case of decompression sickness take immediately to a medical lock”. O. Reg. 213/91, s. 339 (2). (3) The constructor at a project shall provide workers with the badge required under subsection (1). O. Reg. 213/91, s. 339 (3). Communications
340. (1) A telephone system for work in compressed air shall be provided at a project. O. Reg. 213/91, s. 340 (1). (2) A telephone system shall consist of telephones located, (a) at a location as close as is practicable to the work face; (b) in every work chamber near a door that leads to an air lock; (c) in every air lock; (d) near every lock tender’s work position; (e) adjacent to every compressor plant; and (f) in the superintendent’s office. O. Reg. 213/91, s. 340 (2).
341. (1) An electric buzzer or bell system for work in compressed air shall be provided at a project. O. Reg. 213/91, s. 341 (1). (2) An electric buzzer or bell system shall consist of a switch and a buzzer or bell located, (a) in every work chamber near a door that leads to an air lock; (b) in every air lock; and (c) near every lock tender’s work position. O. Reg. 213/91, s. 341 (2). (3) A signal set out in Column 1 of the Table shall be used to communicate the meaning set out opposite to it in Column 2 between a work chamber, an air lock and the lock tender’s work position. TABLE Item   Column 1   Code of signals   Column 2   Meaning 

  1.   1 signal   When no people are in the air lock, MATERIAL IS COMING OUT. 

  2.   2 signals   When people are in the air lock, STOP COMPRESSING. 

  3.   3 signals   PEOPLE ARE COMING OUT OF THE AIR LOCK. O. Reg. 345/15, s. 29. (4) A copy of the signal code shall be posted near every switch of an electric buzzer or bell system. O. Reg. 213/91, s. 341 (4). (5) A lock tender shall acknowledge every signal received on an electric buzzer or bell system by returning the same signal. O. Reg. 213/91, s. 341 (5). Fire Prevention
342. (1) No person shall use acetylene while working in compressed air. O. Reg. 213/91, s. 342 (1). (2) No person shall smoke or be permitted to smoke in an air lock or work chamber, other than in an area designated as a smoking area by the superintendent. O. Reg. 213/91, s. 342 (2).
343. Before a flame-cutting, gas-welding or similar source of ignition is introduced into a work chamber that is in the vicinity of a combustible material, (a) a firewatch shall be established and maintained; (b) a fire hose shall be prepared for use; (c) the fire hose shall be tested to ensure there is an adequate supply of water and water pressure to extinguish a fire; and (d) a fire extinguisher suitable for the hazard shall be provided nearby. O. Reg. 213/91, s. 343.
344. As far as practicable, no combustible material shall be installed in or stored in an air lock or work chamber. O. Reg. 213/91, s. 344.
345. (1) A standpipe connected to a source of water or connected to other pipes above ground shall be installed in every air lock and work chamber at a project. O. Reg. 213/91, s. 345 (1). (2) A standpipe shall have, (a) valves that isolate the standpipe from the rest of the fire prevention system; (b) a fitting that is controlled by a valve installed on the standpipe on the work chamber side of the bulkhead and by a valve inside the material lock; (c) a fitting and valve similar to that described in clause (b) installed at the end of the standpipe nearest to the work face; and (d) the location of the fittings and valves clearly marked. O. Reg. 213/91, s. 345 (2). (3) A fitting described in clause (2) (b) shall be such that a fire hose of the local fire department can be connected to it. O. Reg. 213/91, s. 345 (3). Lighting and Electrical Supply
346. Electrical wiring passing through an air lock or the bulkheads adjacent to an air lock, other than telephone and signal system wiring, shall be installed in a rigid metal conduit. O. Reg. 213/91, s. 346.
347. (1) A lighting system shall be provided in each work chamber. O. Reg. 213/91, s. 347 (1). (2) Electric light bulbs used in an air lock shall be enclosed in a glass and metal protective screen cover. O. Reg. 213/91, s. 347 (2). (3) Flashlights shall be readily available at the entrance to an air lock, on the atmospheric side in an air lock and at every telephone required by section 340. O. Reg. 213/91, s. 347 (3).
348. An auxiliary source of supply of electricity that is not a portable emergency source of supply shall be provided for the lighting system. O. Reg. 213/91, s. 348.
349. (1) An emergency electrical lighting system shall be provided and maintained in each air lock and work chamber. O. Reg. 213/91, s. 349 (1); O. Reg. 142/17, s. 37. (2) An emergency electrical lighting system, (a) shall be connected to the electrical supply so that it automatically turns on in the event of the failure of the electrical supply; and (b) shall have a testing switch, if the system is battery-powered. O. Reg. 213/91, s. 349 (2). (3) An emergency electrical lighting system shall be tested at intervals that are at least as frequent as recommended by the manufacturer and that are adequate to ensure that it will function in an emergency. O. Reg. 213/91, s. 349 (3). Sanitation
350. A work chamber shall be provided with a reasonable supply of drinking water and at least one chemical toilet. O. Reg. 213/91, s. 350. Medical Requirements
351. (1) An employer who is constructing a tunnel or caisson in which a worker works or will work in compressed air shall employ as project physician at least one legally qualified medical practitioner. O. Reg. 213/91, s. 351 (1). (2) The project physician shall conduct such medical examinations of workers as in his or her opinion are necessary and shall establish a medical treatment program for the workers. O. Reg. 213/91, s. 351 (2). (3) A project physician shall be reasonably available to render medical treatment or advice on the treatment of decompression sickness while a worker is working in compressed air. O. Reg. 213/91, s. 351 (3). (4) The employer shall ensure that the project physician instruct workers on the hazards of working in compressed air and the necessary precautions to be taken to avoid decompression sickness. O. Reg. 213/91, s. 351 (4). (5) If the pressure in a work chamber at a project may exceed 350 kilopascals for a period of more than five minutes, a project physician shall establish procedures to control decompression sickness including, (a) the maximum length of work periods for the workers in the chamber; (b) the minimum length of rest periods for workers in the chamber; and (c) compression and decompression procedures. O. Reg. 213/91, s. 351 (5).
353. (1) A worker who is about to work in compressed air and who does not feel well for any reason shall report the fact as soon as is practicable to the superintendent or a project physician before working in compressed air. O. Reg. 213/91, s. 353 (1). (2) A worker who is working in compressed air and who does not feel well for any reason shall report the fact as soon as practicable to the superintendent or a project physician. O. Reg. 213/91, s. 353 (2).
354. A worker who is absent for a period of ten or more days from working in compressed air shall not resume work in compressed air until a project physician indicates on the form described in clause 352 (1) (b) that the worker is physically fit to resume work in compressed air. O. Reg. 213/91, s. 354; O. Reg. 64/18, s. 4. Medical Locks
355. (1) A first aid room shall be provided in close proximity to each medical lock at a project. O. Reg. 213/91, s. 355 (1). (2) A first aid room shall contain all equipment necessary for first aid for workers working in compressed air and facilities adequate for conducting medical examinations. O. Reg. 213/91, s. 355 (2).
356. (1) A constructor shall supply at least one medical lock at a project where work in compressed air is done and shall maintain it ready for operation while work in compressed air is being done. O. Reg. 213/91, s. 356 (1). (2) A certificate of inspection issued under Ontario Regulation 220/01 (Boilers and Pressure Vessels) made under the Technical Standards and Safety Act, 2000
for a working pressure of at least 520 kilopascals is required for every medical lock on a project. O. Reg. 213/91, s. 356 (2); O. Reg. 142/17, s. 39.
357. (1) A medical lock shall be not less than 1.8 metres high at its centre line. O. Reg. 213/91, s. 357 (1). (2) A medical lock shall be divided into two pressure compartments. O. Reg. 213/91, s. 357 (2). (3) Each compartment of a medical lock shall have air valves that are arranged so that the compartment can be pressurized and depressurized from inside and outside the lock. O. Reg. 213/91, s. 357 (3). (4) An observation window shall be installed in each door and in the rear wall of a medical lock. O. Reg. 213/91, s. 357 (4). (5) A medical lock shall be equipped with, (a) a pressure release valve which will automatically blow-off at a pressure not greater than seventy kilopascals more than the operating pressure of the work chamber; (b) a pressure gauge, a thermometer, a telephone, a cot, seating and a radiant heater; and (c) a cot mattress, mattress cover and blankets all of which are made of material that is not readily flammable. O. Reg. 213/91, s. 357 (5). (6) The pressure release valve shall be tested and calibrated before the medical lock is used. O. Reg. 213/91, s. 357 (6). (7) A medical lock shall be maintained at a temperature of at least 18 degrees celsius, well-lit and well-ventilated and kept clean and sanitary. O. Reg. 213/91, s. 357 (7).
358. (1) A project physician shall control the medical treatment of workers in a medical lock at a project. O. Reg. 213/91, s. 358 (1). (2) While a worker is working in compressed air and for twenty-four hours afterwards, at least one worker experienced in the decompression of persons suffering from decompression sickness, (a) shall be present on the project, if the work in compressed air was done at a pressure greater than 100 kilopascals; or (b) shall be readily available, if the work in compressed air was done at a pressure of 100 kilopascals or less. O. Reg. 213/91, s. 358 (2). Air Compressors
359. (1) The superintendent shall designate at least one competent worker to be in charge of the compressors compressing air for a work chamber and air lock. O. Reg. 213/91, s. 359 (1). (2) Revoked: O. Reg. 88/13, s. 3. (3) A competent worker designated under subsection (1) shall attend to the compressors, (a) while a person is in compressed air in the work chamber or air lock; and (b) for twenty-four hours after a person has been in compressed air with a pressure exceeding 100 kilopascals in the work chamber or air lock. O. Reg. 213/91, s. 359 (3). (4) Revoked: O. Reg. 88/13, s. 3.
360. (1) At least two air compressors shall be provided for every work chamber and air lock at a project. O. Reg. 213/91, s. 360 (1). (2) The air compressors for a work chamber or an air lock shall have capacity enough to ensure that, if one compressor is not operating, the remaining compressors are capable of supplying the air required for the work chamber or air lock. O. Reg. 213/91, s. 360 (2).
361. (1) The energy required to furnish compressed air to a work chamber or an air lock shall be readily available at a project from at least two independent sources. O. Reg. 213/91, s. 361 (1). (2) The two sources of energy shall be arranged so that, should the principal energy source fail, an auxiliary source automatically energizes the compressor. O. Reg. 213/91, s. 361 (2). (3) An auxiliary source of energy shall be inspected and tested by being operated at regular intervals of not more than seven days to ensure that it works. O. Reg. 213/91, s. 361 (3).
362. (1) A compressor for a work chamber or an air lock shall be constructed so as to ensure that lubricating oil is not discharged with the air that the compressor supplies. O. Reg. 213/91, s. 362 (1). (2) The air intake for a compressor shall be located so as to prevent the entry of exhaust gases from internal combustion engines or other contaminants. O. Reg. 213/91, s. 362 (2).
363. Air supplied for use in a work chamber or an air lock, (a) shall be clean and free from excessive moisture, oil or other contaminants; and (b) shall be kept between 10 degrees and 27 degrees celsius, as far as is practicable. O. Reg. 213/91, s. 363. Air Locks and Work Chambers
364. One air lock shall be provided for each work chamber at a project. O. Reg. 213/91, s. 364.
365. (1) An air lock, including the bulkheads and doors, shall be designed by an engineer in accordance with good engineering practice to withstand the pressures to be used in the work chamber and in the air lock. O. Reg. 213/91, s. 365 (1); O. Reg. 375/22, s. 5. (2) An air lock shall be constructed in accordance with the engineer’s design drawings for it. O. Reg. 213/91, s. 365 (2); O. Reg. 375/22, s. 4. (3) An air lock used for people, (a) shall measure at least two metres laterally and vertically; (b) shall be large enough to accommodate the maximum number of people expected to be in the work chamber without them being in cramped positions; (c) other than an ancillary air lock that complies with section 367, shall contain a functional and accurate electric time piece, thermometer and pressure gauge. O. Reg. 213/91, s. 365 (3). (4) The constructor shall send to a Director before construction of an air lock begins a copy of the design drawings for the air lock. O. Reg. 213/91, s. 365 (4); O. Reg. 145/00, s. 40; O. Reg. 85/04, s. 24. (5) The constructor shall keep at a project a copy of the design drawings for an air lock while the air lock is at the project. O. Reg. 213/91, s. 365 (5).
366. Separate air locks shall be used for people and for materials, (a) if the air lock is in a shaft; or (b) where practicable, if the air locks are installed in a tunnel and if the air pressure is likely to exceed 100 kilopascals. O. Reg. 213/91, s. 366.
367. (1) Every air lock shall have an ancillary air lock that, (a) can be pressurized independently of the primary air lock; (b) has a door into the primary air lock or into the work chamber; and (c) has a door into air at atmospheric pressure. O. Reg. 213/91, s. 367 (1). (2) Except in an emergency, a door in an ancillary air lock into air at atmospheric pressure shall be kept open. O. Reg. 213/91, s. 367 (2). (3) A vertical air lock in a shaft or pneumatic caisson shall not be used to decompress workers unless a separate worker-lock with its own controls for compression and decompression is provided. O. Reg. 213/91, s. 367 (3). (4) An ancillary air lock shall be used to enter the work chamber only, (a) when the door between the chamber and the primary air lock is open; and (b) when it is impossible or impracticable for the door to be closed. O. Reg. 213/91, s. 367 (4). (5) Except in an emergency, an ancillary air lock shall not be used to decompress people. O. Reg. 213/91, s. 367 (5).
368. (1) At least two pipes shall supply air to each work chamber and each air lock. O. Reg. 213/91, s. 368 (1). (2) Each of the pipes shall have a valve installed in the vicinity of the compressors to enable one pipe to be disconnected while another pipe remains in service at the work chamber or air lock. O. Reg. 213/91, s. 368 (2). (3) The outlet end of a pipe supplying air to a work chamber or an air lock shall have a hinged flap valve. O. Reg. 213/91, s. 368 (3).
369. (1) Each work chamber and each air lock, including an ancillary air lock, shall have a means of controlling and of automatically limiting the maximum air pressure in it. O. Reg. 213/91, s. 369 (1). (2) The air pressure control mechanism shall be set at a level not greater than, (a) for an air lock, the pressure for which the air lock, bulkheads and doors are designed; and (b) for a work chamber, seventy kilopascals more than the maximum air pressure to be used in the chamber. O. Reg. 213/91, s. 369 (2).
370. At each set of valves controlling the air supply to and discharge from an air lock, there shall be, (a) a pressure gauge showing the air pressure in the air lock; (b) a pressure gauge showing the air pressure in the work chamber; (c) an electric time piece; (d) a thermometer showing the temperature in the air lock; and (e) a legible copy of the procedures governing maximum work periods and minimum decompression times for the air lock. O. Reg. 213/91, s. 370.
371. (1) Separate valves controlling the air supply to and discharge from an air lock shall be provided inside and outside the lock. O. Reg. 213/91, s. 371 (1). (2) The valves shall be arranged so that a person can enter or leave the air lock or work chamber if no lock tender is attending the air lock. O. Reg. 213/91, s. 371 (2).
372. If an automatic compression and decompression device is installed in an air lock used for people, the air lock shall have a manual means of controlling the air pressure in the lock. O. Reg. 213/91, s. 372.
373. (1) An air lock, other than an ancillary air lock, used for people shall have an automatic recording gauge to permanently record the air pressure in the lock. O. Reg. 213/91, s. 373 (1). (2) The gauge shall be a rotating dial or strip-chart rectilinear type. O. Reg. 213/91, s. 373 (2). (3) The gauge, (a) shall be installed so that the lock tender cannot see it when at the controls of the air lock; (b) shall indicate the change in air pressure at intervals of not more than five minutes; and (c) shall be kept locked except when the recording paper is being changed. O. Reg. 213/91, s. 373 (3). (4) Despite subsection (2) and clause (3) (b), the gauge for an air lock at a work chamber whose air pressure exceeds 100 kilopascals shall be the strip-chart rectilinear type and shall indicate the change in air pressure at intervals of not more than one minute. O. Reg. 213/91, s. 373 (4). (5) The recording paper used in a gauge shall be changed every seven days and shall be marked to identify the period of time to which it relates. O. Reg. 213/91, s. 373 (5).
374. (1) An air lock shall have a pressure gauge that can be read from the work chamber and that shows the air pressure in the lock. O. Reg. 213/91, s. 374 (1). (2) A pressure gauge, other than a portable pressure gauge, shall have fittings for attaching test gauges to it and shall be tested daily for accuracy. O. Reg. 213/91, s. 374 (2).
375. A work chamber shall contain, in a protective container less than 15 metres from the work face, a portable pressure gauge and a thermometer. O. Reg. 213/91, s. 375; O. Reg. 142/17, s. 40.
376. (1) Only one unit of measuring pressure (either kilopascals or pounds per square inch) shall be used on a project. O. Reg. 213/91, s. 376 (1). (2) Pressure gauges for decompression equipment and decompression procedures established for a project shall be calibrated using the unit of pressure for the project. O. Reg. 213/91, s. 376 (2).
377. (1) The door between an air lock and a work chamber shall be kept open, (a) unless the air lock is being used to compress or decompress people or to move materials; or (b) when people are in the work chamber. O. Reg. 213/91, s. 377 (1). (2) Clause (1) (a) does not apply with respect to an ancillary air lock. O. Reg. 213/91, s. 377 (2).
378. Every air lock door shall have a transparent observation window. O. Reg. 213/91, s. 378.
379. If practicable, an air lock used for people, other than an ancillary air lock, shall have one seat for each person being decompressed at one time. O. Reg. 213/91, s. 379.
380. (1) An air lock in which people are decompressed shall have a means of radiant heat if the air pressure in the lock exceeds 100 kilopascals. O. Reg. 213/91, s. 380 (1). (2) The temperature in an air lock used for people shall not exceed 27 degrees celsius. O. Reg. 213/91, s. 380 (2).
381. (1) A smoke line shall be provided from each work face of a work chamber if an air lock or bulkhead is located between the chamber and the surface. O. Reg. 213/91, s. 381 (1). (2) Each smoke line shall extend to a point less than 15 metres from a work face. O. Reg. 213/91, s. 381 (2); O. Reg. 142/17, s. 41 (1). (3) Each smoke line shall have two quick opening valves at least 100 millimetres in diameter, (a) one located less than 17 metres from the work face; and (b) one located between the air lock closest to the work chamber and the work chamber and less than two metres from the air lock. O. Reg. 213/91, s. 381 (3); O. Reg. 142/17, s. 41 (2, 3). (4) Each smoke line shall be at least 100 millimetres in diameter and shall have a readily-accessible outlet above ground, (a) that has a quick opening valve at least 100 millimetres in diameter; (b) that is clearly marked with a sign stating “SMOKE LINE – TO BE USED ONLY IN CASE OF EMERGENCY”; and (c) that is sealed to prevent the inadvertent opening of the valve. O. Reg. 213/91, s. 381 (4). (5) Each smoke line shall extend from inside the work chamber to above ground and shall pass vertically through either the air lock or the bulkhead between the work chamber and air at atmospheric pressure. O. Reg. 213/91, s. 381 (5).
382. (1) No bulkhead in a work chamber shall interfere with the free passage from the work face to an air lock of people in a tunnel or shaft. O. Reg. 213/91, s. 382 (1). (2) Subsection (1) does not apply with respect to a partial bulkhead in a sub-aqueous tunnel if the bulkhead is designed and placed to trap air so that workers can escape from the tunnel if it is flooded. O. Reg. 213/91, s. 382 (2).
383. (1) Except when it is necessary to protect people during an emergency, the pressure in a work chamber shall not exceed 350 kilopascals for more than five minutes. O. Reg. 213/91, s. 383 (1). (2) If the pressure in a work chamber exceeds 350 kilopascals for more than five minutes, (a) the superintendent shall promptly notify an inspector by telephone, two-way radio or in person; and (b) the pressure maintained in the work chamber shall be the least possible pressure required to meet the emergency. O. Reg. 213/91, s. 383 (2).
384. (1) Subject to subsection (2), no worker shall work or be permitted to work in a work chamber in which the temperature exceeds the greater of, (a) 27 degrees celsius; and (b) the temperature at the entrance to the service shaft above ground. O. Reg. 213/91, s. 384 (1). (2) No worker shall work or be permitted to work in a work chamber in which the temperature exceeds 38 degrees celsius. O. Reg. 213/91, s. 384 (2).
385. (1) Water on the floor of a work chamber or an air lock shall be drained by a pipe or mop line and, if necessary, a pump. O. Reg. 213/91, s. 385 (1). (2) A pipe or mop line shall have an inside diameter of at least fifty-one millimetres. O. Reg. 213/91, s. 385 (2). (3) At least one inlet with a valve to a pipe or mop line for an air lock and work chamber shall be located, (a) in the air lock; (b) less than 15 metres from the work face; and (c) at intervals of not more than thirty metres along the length of the work chamber. O. Reg. 213/91, s. 385 (3); O. Reg. 142/17, s. 42. (4) An inlet shall be diverted downward. O. Reg. 213/91, s. 385 (4). (5) An outlet from an air lock shall discharge downward under atmospheric air pressure. O. Reg. 213/91, s. 385 (5). Work Periods and Rest Periods
386. (1) Subject to subsection (2), no worker shall, (a) work for more than two working periods in any consecutive twenty-four hour period where the maximum air pressure is not greater than 100 kilopascals; or (b) work for more than one working period in any consecutive twenty-four hour period where the maximum air pressure is more than 100 kilopascals. O. Reg. 213/91, s. 386 (1). (2) No worker shall work or be permitted to work more than eight hours in a period of twenty-four hours. O. Reg. 213/91, s. 386 (2). (3) No lock tender shall work or be permitted to work more than nine hours in a period of twenty-four hours. O. Reg. 213/91, s. 386 (3). (4) The period between the end of one work period and the beginning of the next for a worker doing manual work under compressed air where the maximum air pressure exceeds 100 kilopascals shall be at least twelve hours. O. Reg. 213/91, s. 386 (4).
387. (1) A worker who is working in compressed air shall have a rest period of at least, (a) ¼ hour, if the worker was working in pressure of 100 kilopascals or less; (b) ¾ hour, if the worker was working in pressure greater than 100 kilopascals up to and including 140 kilopascals; (c) 1½ hours, if the worker was working in pressure greater than 140 kilopascals up to and including 220 kilopascals; or (d) two hours, if the worker was working in pressure greater than 220 kilopascals. O. Reg. 213/91, s. 387 (1). (2) No worker shall be permitted to perform manual work or engage in physical exertion during a rest period. O. Reg. 213/91, s. 387 (2). (3) No worker shall be permitted to leave a project during a rest period. O. Reg. 213/91, s. 387 (3).
388. (1) The employer shall provide, free of charge, sugar and hot beverages for workers working in compressed air to consume during their rest periods. O. Reg. 213/91, s. 388 (1). (2) An employer shall keep containers and cups for beverages in a sanitary condition and shall store them in a closed container. O. Reg. 213/91, s. 388 (2). Lock Tenders
389. (1) A lock tender shall supervise the controls of an air lock when a worker is about to be, or is being, subjected to compressed air in the air lock or work chamber. O. Reg. 213/91, s. 389 (1). (2) Subject to subsection (3), a lock tender shall tend only one air lock at a time. O. Reg. 213/91, s. 389 (2). (3) A lock tender may tend two locks if, (a) they are in close proximity; (b) the pressure in each work chamber does not exceed 100 kilopascals; and (c) only one of the locks is being used to compress or decompress a worker. O. Reg. 213/91, s. 389 (3).
390. (1) A lock tender shall ensure that the requirements of this section are met before a worker enters an air lock. O. Reg. 213/91, s. 390 (1). (2) A worker shall be examined by a project physician before the worker enters an air lock in preparation for working in compressed air. O. Reg. 213/91, s. 390 (2). (3) A lock tender shall ensure that any worker who enters the air lock in preparation for working in compressed air has been examined by a physician in accordance with subsection (2). O. Reg. 213/91, s. 390 (3). (4) The means of air supply, air pressure gauges and controls, lock equipment and other devices necessary for the safe operation of an air lock and the protection of workers shall be in working order. O. Reg. 213/91, s. 390 (4).
391. (1) A lock tender shall increase the air pressure on a worker in an air lock in accordance with this section. O. Reg. 213/91, s. 391 (1). (2) Air pressure shall be increased uniformly and to no more than thirty-five kilopascals in the first two minutes of application of compressed air. O. Reg. 213/91, s. 391 (2). (3) Air pressure shall not be increased to more than thirty-five kilopascals until the lock tender ensures that every worker in the air lock is free from discomfort due to air pressure. O. Reg. 213/91, s. 391 (3). (4) Air pressure shall be increased above thirty-five kilopascals at a uniform rate of not greater than thirty-five kilopascals per minute. O. Reg. 213/91, s. 391 (4). (5) A lock tender shall observe a worker in an air lock while increasing the air pressure on the worker and, if the worker shows signs of discomfort and the discomfort does not quickly disappear, the lock tender shall gradually decrease the air pressure until the worker reports that the discomfort has ceased or until the air pressure reaches atmospheric pressure. O. Reg. 213/91, s. 391 (5).
392. (1) A lock tender shall decrease the air pressure on a worker in an air lock in accordance with this section and section 395. O. Reg. 213/91, s. 392 (1). (2) Air pressure shall be decreased uniformly in each of the stages of decompression referred to in section 395. O. Reg. 213/91, s. 392 (2). (3) A lock tender shall constantly observe a worker in an air lock while decreasing the air pressure on the worker and, if the worker shows signs of discomfort and the discomfort does not quickly disappear, the lock tender shall gradually increase the air pressure until the worker reports that the discomfort has ceased or until the air pressure equals the pressure in the work chamber. O. Reg. 213/91, s. 392 (3).
393. (1) If a worker in an air lock appears to be suffering from decompression sickness, a lock tender shall notify, and follow the instructions of, a project physician, the superintendent or a person designated by the superintendent. O. Reg. 213/91, s. 393 (1). (2) If a worker in an air lock appears to be injured or to be unwell from a cause unrelated to air pressure, a lock tender shall notify, and follow the instructions of, a project physician. O. Reg. 213/91, s. 393 (2). (3) In the circumstances described in subsection (2), a lock tender shall decompress the worker unless otherwise instructed by the project physician. O. Reg. 213/91, s. 393 (3).
394. (1) A lock tender shall record information about the compression and decompression of a worker in an air lock. O. Reg. 213/91, s. 394 (1). (2) A separate record shall be kept for each air lock and each compression and decompression of a worker. O. Reg. 213/91, s. 394 (2). (3) The information to be recorded is, (a) the description of the air lock; (b) the worker’s name; (c) the time of the beginning and end of each compression or decompression to which the worker is subjected; (d) the pressure and temperature in the air lock before and after each compression or decompression to which the worker is subjected; and (e) a description of any unusual occurrence respecting the worker, the air lock or any related matter. O. Reg. 213/91, s. 394 (3). (4) A lock tender shall give the record to the superintendent. O. Reg. 213/91, s. 394 (4). Decompression Procedures
395. (1) A worker who has been in air pressure greater than atmospheric air pressure for more than five minutes shall be decompressed down to atmospheric pressure in accordance with this section. O. Reg. 213/91, s. 395 (1). (2) Subject to subsection (3), decompression shall be done in accordance with Table A.1 and Table A.2 as set out in the CSA Standard Z275.3-09 (R2014): Occupational Safety Code for Work in Compressed Air Environments. O. Reg. 64/18, s. 5 (1). (3) The rate of decompression required by subsection (2) may be doubled with respect to a worker if, while performing the work in compressed air, the worker, (a) has not been exposed to air pressure greater than 220 kilopascals; (b) has remained under compressed air for a maximum of thirty minutes; and (c) has not done manual work. O. Reg. 213/91, s. 395 (3). (4) Subsection (3) applies only if every worker who is in the air lock, (a) meets the requirements of clauses 3 (a), (b) and (c); and (b) has previously experienced decompression. O. Reg. 213/91, s. 395 (4). (5) A copy of the tables used for decompression described in subsection (2) shall be kept posted at a project, (a) in each air lock; (b) at the controls outside each air lock; and (c) in each change room. O. Reg. 213/91, s. 395 (5); O. Reg. 64/18, s. 5 (2).
396. A worker who believes he or she has decompression sickness shall promptly notify, (a) the superintendent or a project physician; or (b) the lock tender, if the worker is under compressed air. O. Reg. 213/91, s. 396.
397. (1) The superintendent shall make a report at least once a week to a Director concerning every case of decompression sickness at a project occurring since the previous report, if any. O. Reg. 213/91, s. 397 (1); O. Reg. 145/00, s. 41 (1). (2) The superintendent shall promptly make a report by telephone, two-way radio or other direct means to a Director concerning a case of decompression sickness that does not respond to first-aid treatment. O. Reg. 213/91, s. 397 (2); O. Reg. 145/00, s. 41 (2). (3) A report under this section shall indicate, for each case of decompression sickness, (a) the air pressure to which the worker was subjected; (b) the length of time the worker was subjected to the air pressure; (c) the nature of the medical treatment given to the worker; and (d) the extent of the worker’s recovery. O. Reg. 213/91, s. 397 (3).
398. Omitted (revokes other Regulations). O. Reg. 213/91, s. 398.
399. Omitted (provides for coming into force of provisions of this Regulation). O. Reg. 213/91, s. 399. Tables 1, 2 Revoked: O. Reg. 64/18, s. 6. Form 1 Revoked: O. Reg. 64/18, s. 6.  Français