PART VI OCCUPATIONAL HEALTH REQUIREMENTS — Ventilation

there is appropriate circulation of clean and wholesome air; all parts of a ventilation system are maintained; the engine shall be adequately serviced and maintained to minimize the concentration of air contaminants in the exhaust to the applicable ACGIH Standards, and the mechanical ventilation system

there is adequate ventilation; and louvers are cleaned regularly; and the work area shall be assessed to determine the potential for exposure of workers to harmful levels of exhaust components. a qualified person inspects and maintains all parts of a mechanical ventilation system, cleans all louvers and replaces or adequately cleans all filters at a frequency that is sufficient to protect the health and safety of workers;

impurities are made harmless and inoffensive in a workplace in accordance with standards established by ASHRAE and ACGIH. ventilation openings are free of obstruction and sources of contamination. a record of all inspections, maintenance and cleaning of the mechanical ventilation system is

Where a work or process gives off dust, fumes, vapour, mist or other impurity of a kind and quantity liable to be injurious or offensive to a worker, an employer shall provide, maintain and ensure the proper use of a ventilation system sufficient to protect the worker against inhalation of impurities and to prevent impurities accumulating in the work space.

Where practicable, local exhaust ventilation shall be installed and maintained near to the point of origin of an impurity to prevent it entering the air of the workplace and the breathing zone of its workers.

Impurities removed under subsections (2) and (3) shall be exhausted clear of a workplace and prevented from entering a workplace.

An employer shall ensure that,

Where possible, exhaust from an internal combustion engine operated indoors shall be vented to the outdoors.

Where mobile equipment powered by an internal combustion engine is operated indoors or in an enclosed work area

Where a worker is or may be exposed to an exhaust gas component in concentrations exceeding the applicable exposure limits, exhaust gas scrubbers, catalytic converters, or other engineering controls shall be installed.

An employer, contractor or owner shall ensure that

including humidification equipment, is constructed and maintained to minimize the growth and dissemination of micro-organisms, insects and mites through the ventilation system, and (ii) where reasonably practicable, is readily accessible for cleaning and inspection; completed by a qualified person who performs the work, and (ii) readily available for examination by the occupational health and safety committee, or worker representative or designate or, where there is no committee, representative or designate, by the workers and the occupational health and safety officer;

when mechanical ventilation is required, the ventilating fans are located to prevent recirculation of contaminated air; and

measurements of the air volume of the mechanical ventilation system are taken at suitable intervals to ensure compliance with the minimum air volume requirements in accordance with standards established by ASHRAE, ACGIH or other applicable standard approved by the minister.

An employer shall ensure that, wherever possible, a less hazardous substance or work process is used in preference to a more hazardous substance or process.

A ventilation system used to control airborne contaminants shall have electrical and mechanical systems designed to control all potential ignition sources and meet the requirements of the Canadian Electrical Code.