Application
14.8.1.

Division 8 applies to indoor or enclosed areas when occupied by employees, except:

(a) a controlled atmosphere enclosure;

(b) a confined space; and

(c) when clearly impracticable, such as during some construction or renovation projects

Installation and Maintenance
14.8.1.2

(1) A railway must ensure that a ventilation system for the supply and distribution of air and removal of indoor air contaminates is designed, constructed and operated in accordance with: (a) established engineering principles; and

(b) ASHRAE Standard 62-1989, "Ventilation for Acceptable Indoor Air Quality", or other standard acceptable to the safety officer .

(2) An adequate supply of outdoor air must be provided to the workplace in accordance with Table 2 of the ASHRAE Standard 62-1989, or other standard acceptable to the safety officer .

(3) For a building ventilation installed prior to 1989, an adequate supply of outdoor air must be provided in accordance with the ASHRAE standard in place at the time the ventilation system was designed, or other standard acceptable to the safety officer. ..

Distribution
14.8.1.3

Outdoor air must be effectively distributed throughout the workplace

Balancing
14.8.1.4

The ventilation system must be balanced to:

1. ensure that each space within the building receives an adequate allotment of outdoor air, and

(b) accommodate the actual or the normally anticipated occupancy of each space.

Ventilation Openings
14.8.1.5

(1) A ventilation system must not be obstructed by material or equipment placed in front of the ventilation air intakes or discharged points.

(2) Outdoor air intakes must be located so that outdoor air entering the ventilation system does not contain any contaminant in a concentration greater than normal outdoor air in that locality .

Discharge Air
14.8.1.6

A ventilation system that discharges air from the work area must be designed to minimize the likelihood of exposing any employee at a workplace, including adjacent workplace:

(a) to an air contaminant in a concentration which exceeds either 10% of its applicable exposure limit in Division 15 of this Part, or an acceptable ambient air quality standard established by an authority having jurisdiction over environmental air standards, whichever is greater, and

(b) where practicable, to an objectionable odour.

Preventative Maintenance
14.8.1.7

(1) To maintain acceptable air quality, the railway must establish an effective preventative maintenance program for the ventilation system.

(2) Preventative maintenance must include:

(a) regular inspections:

(i) of all critical components of the ventilation system, such as dampers, fans, belts, baffles, ductwork, diffusers and controls systems, and

(ii) for conditions which would promote the growth of micro-organisms, such as water leaks or stagnant water pools;

(b) correction of any deficiencies found during the inspections carried out under paragraph (a);

(c) repair or replacement of malfunctioning and consumable components, such as filters and

belts, and the cleaning of air distribution systems, ducts and dampers when necessary to correct an indoor air quality deficiency;

(d) adequate treatment of open water systems associated with ventilation equipment such as cooling towers and humidifiers, to control biological growth; and

(e) maintenance of combustion sources, such as furnaces, space heaters and water heaters to assure proper burning and exhausting of waste gases so that recirculation of gases to the workplace will not occur .

Investigation
14.8.1.8 (1)

The railway must ensure that the indoor air quality is investigated when:

(a) complaints are reported;

(b) occupancy in the space changes substantially; or

(c) renovation involving significant changes to the ventilation system occur.

(2) An air quality investigation must include:

(a) assessment of the ventilation rate, unless the indoor carbon dioxide level is less than 650 ppm above ambient outdoor levels;

(b) inspection of the ventilation system as required in subsection 14.8.1.7 (2);

(c) sampling for airborne contaminants suspect to be present in concentrations associated with the report complaints; and

( d) a record of the complaint, the findings of the investigation, and any action taken.

Temperature and Humidity
14.8.1.9

The railway must ensure that temperature and humidity levels within the indoor work environment are maintained within acceptable comfort ranges, as far as possible.

Controlling Exposure
14.8.2.1

The railway must control the exposure of employees at any workplace to environmental tobacco smoke by: .

(a) prohibiting smoking in the workplace, or

(b) restricting smoking to designated smoking areas or by other effective means.

Designated Areas
14.8.2.2

(1) A designated smoking area provided under paragraph 14.8.2.1 (b) must be clearly identified to the workforce by signs or other effective means and must be:

(a) a safe outdoor location, or

(b) a room structurally separate from other work or break areas.

(2) If necessary to prevent tobacco smoke from entering a workplace, the designated smoking room must be provided with a separate, non-recirculating ventilation system which:

(3) Except in an emergency, a railway must not require an employee to enter an indoor area where smoking is permitted under section 14.8.2.1 until the tobacco smoke has been effectively removed.

Public Areas
14.8.2.3

(1) Areas used by the public are exempt from the requirements of subsection 14.8.2.3 (1), if the exposure to employees to environmental tobacco smoke is minimized by the use of all reasonable and practicable controls, including administrative and engineering controls.

(2) The exemption provided in subsection 14.8.2.3 (2) expires on January 01, 2000.

Note: For the purpose of this section, public areas include enclosed areas where railway passengers congregate or wait for passenger trains such as underground platforms, waiting rooms, ticket offices, etc.