PART 11Lighting (continued)
Working, Walking and Climbing Areas
156 Unless otherwise specified, all working, walking and climbing areas must be illuminated to
Visual Display Terminals
(2) Reflection glare on a VDT screen must be reduced to the point where an employee at a task position is able to read every portion of any text displayed on the screen and see every portion of the visual display on the screen.
(3) If VDT work requires the reading of a document, supplementary lighting must be provided where necessary to give a level of lighting of at least 500 lx on the document.
PART 12Prevention of Noise and Vibration
158 The following provisions do not apply in respect of vessels constructed before the day on which the MLC 2006 comes into force in Canada:
159 The following definitions apply in this Part.
- A-weighted sound pressure level
A-weighted sound pressure level means a sound pressure level as determined by a measurement system which includes an A-weighting filter that meets the requirements set out in the International Electrotechnical Commission International Standard IEC 61672-1:2002(E), 1st edition 2002-2005 Electroacoustics – Sound Level Meters. (niveau de pression acoustique pondérée A)
dBA means decibel A-weighted and is a unit of A-weighted sound pressure level. (dBA)
- noise exposure level (Lex,8)
noise exposure level (Lex,8) means 10 times the logarithm to the base 10 of the time integral over any 24-hour period of a squared A-weighted sound pressure divided by 8, the reference sound pressure being 20 µPa. (niveau d’exposition (Lex,8))
- sound level meter
sound level meter means an instrument for measuring levels of sound and impulse sound that meets the standards set out in CSA Standard CAN/CSA-Z107.56-06, Procedures for the Measurement of Occupational Noise Exposure. (sonomètre)
- sound pressure level
sound pressure level means 20 times the logarithm to the base 10 of the ratio of the root mean square pressure of a sound to the reference sound pressure of 20 µPa, expressed in decibels. (niveau de pression acoustique)
160 (1) Accommodation and recreational and catering facilities must be located as far as practicable from the engines, steering gear rooms, deck winches, ventilation, heating and air conditioning equipment and other noisy machinery and apparatus.
(2) Acoustic insulation or other appropriate sound-absorbing materials and self-closing noise-isolating doors for machinery spaces must be used in the construction and finishing of bulkheads, deckheads and decks within the sound-producing spaces.
(3) Engine rooms and other machinery spaces must be provided, wherever practicable, with soundproof centralized control rooms for engine-room personnel.
(4) Working spaces, such as the machine shop, must be insulated, as far as practicable, from the general engine-room noise and measures must be taken to reduce noise in the operation of machinery.
(5) Accommodation or recreational or catering facilities must not be exposed to excessive vibration.
Levels of Sound
(2) Subject to subsection (3), if it is not reasonably practicable for an employer to maintain the level of sound in the work place at less than 85 dB, an employee must not be exposed in any 24-hour period
(a) to a level of sound set out in column 1 of the table to this section for a number of hours that is more than the number set out in column 2; or
(b) to any combination of the different levels of sound set out in column 1 of the table to this section, if the number of hours of exposure to each level of sound divided by the maximum number of hours of exposure for that level per 24-hour period set out in column 2 of the table to this section is more than one.
(3) An employee must not be exposed to a continuous level of sound in crew accommodation that is more than 75 dB.
(4) If the level of impulse sound in a work place is more than 140 dB, the employer must provide every employee entering the work place with a hearing protector that
(5) Unless otherwise specified, the limits for noise levels for working and crew accommodations must comply with the ILO international guidelines on exposure levels, including those in the ILO code of practice, entitled Ambient factors in the workplace, 2001, and, if applicable, the specific protection recommended by the IMO, and with any subsequent amending and supplementary instruments for acceptable noise levels on board vessels.
(6) A copy of the documents in English and in French referred to in subsection (5) must be kept on board the vessel and be made available to employees.
Maximum Exposure to Levels of Sound in the Work Place
Column 1 Column 2 Item Levels of Sound in dB Maximum Number of Hours of Exposure per Employee per 24-hour Period 1 85 or more but not more than 90 8 2 more than 90 but not more than 92 6 3 more than 92 but not more than 95 4 4 more than 95 but not more than 97 3 5 more than 97 but not more than 100 2 6 more than 100 but not more than 102 1.5 7 more than 102 but not more than 105 1 8 more than 105 but not more than 110 0.5 9 more than 110 but not more than 115 0.25 10 more than 115 0
(a) appoint a qualified person to carry out an investigation of the degree of exposure;
(b) notify the work place committee or the health and safety representative of the investigation and of the name of the person appointed to carry out the investigation; and
(c) provide every employee entering the work place with a hearing protector that
(2) For the purposes of subsection (1), the measurement of the A-weighted sound pressure level in a work place must be performed instantaneously, in normal working conditions, using the slow response setting of a sound level meter.
(3) During the investigation referred to in subsection (1), the following matters must be considered:
(a) the sources of sound in the work place;
(b) the A-weighted sound pressure levels to which the employee is likely to be exposed and the duration of that exposure;
(c) the methods being used to reduce the exposure;
(d) whether the exposure of the employee is likely to be more than the limits prescribed by section 161; and
(e) whether the employee is likely to be exposed to a noise exposure level (Lex,8) equal to or greater than 85 dBA.
(4) On completion of the investigation and after consultation with the work place committee or the health and safety representative, as the case may be, the person appointed to carry out the investigation must set out in a written report signed and dated by the person
(a) observations respecting the matters considered under subsection (3);
(b) recommendations respecting the measures that are to be taken in order to comply with section 161; and
(c) recommendations respecting the use of hearing protectors by employees who are exposed to a noise exposure level (Lex,8) equal to or greater than 85 dBA and not greater than 87 dBA.
(5) The report must be kept by the employer at the work place where it applies for a period of 10 years after the day on which the report is submitted.
(6) If it is stated in the report that employees are likely to be exposed to a noise exposure level (Lex,8) equal to or greater than 85 dBA, the employer must, without delay,
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