Silica

[OHS Regs., s.xx] Follow these links to related legislation.

Highlighted words reveal definitions when selected.

Silica is the name for a group of naturally occurring minerals that include quartz. Silica is the second most common mineral on earth and is found in virtually all types of rock, sand, soil, and stone. It is also found in construction materials, such as asphalt, brick, cement, concrete, drywall, grout, mortar, plaster, refractory, stucco, tile, etc. Materials that contain crystalline silica become hazardous if they are disturbed by processes like blasting, cutting, and grinding that generate airborne dust.

Repeated overexposure to silica dust can cause serious irreversible lung diseases like silicosis, lung cancer and chronic obstructive pulmonary disease (COPD). It is critical to protect worker health by eliminating or reducing exposure to silica in the workplace.

The silica legislation must be followed whenever workers perform work with silica, including: [OHS Regs., s. 46(2)]

  • Sandblasting;
  • The cleaning of castings;
  • The blasting, fettling, grinding or dressing of a surface containing silica, including the engraving or abrasive cleaning of gravestones, buildings or structures of siliceous stones or rocks;
  • A process in which silica flour is used;
  • The manufacture of silica-containing refractory bricks or silica-containing substances and the dismantling or repair of the refractory lining of furnaces;
  • A process which the chief occupational medical officer has reason to believe creates a risk to the health of workers by silica dust; and
  • A process that includes the getting, cutting, splitting, crushing, grinding, milling, drilling, sieving, or other mechanical manipulation of gravel or siliceous stone or rock where there is potential for exceeding 1% free silica or 50% of TLV.

Employer Responsibilities

Where silica hazards exist in the workplace, employers must:

  • Make all reasonable efforts to protect the health, safety, and welfare of their workers. [OHS Act, s. 4]
  • Provide and maintain a workplace and the necessary equipment, systems, and tools in a manner that is safe and without risk to workers. [OHS Act, s. 5(a)]
  • Provide the necessary information, instruction, training, supervision, and facilities. [OHS Act, s. 5(b)]
  • Make sure necessary personal protective equipment (PPE) and devices are used. [OHS Regs., s. 14(2)]
  • Make sure workers who wear PPE are adequately instructed in their correct use, limitations, and assigned maintenance duties. [OHS Regs., s. 72]
  • Make sure that safe work procedures are followed. [OHS Regs., s. 14(3)]
  • Make sure that safe work procedures promote the safe interaction of workers and their work environment. [OHS Regs., s. 14(4)]
  • Conduct a risk assessment in a workplace where a need to rescue or evacuate workers may arise. When the risk assessment identifies a need for evacuation or rescue, develop written rescue and evacuation procedures and assign a worker to coordinate their implementation. Written rescue and evacuation procedures are required for work with hazardous substance, such as silica dust. [OHS Regs., s. 38(1)(2)(3)]
  • Not allow persons under 18 to work with silica or be involved in cleaning or maintenance work that may expose them to silica dust. This requirement does not apply to work that is a recognized part of an apprenticeship or training that is comparable to an apprenticeship. [OHS Regs., s. 46(11)]
  • Monitor the use or presence of silica at the workplace. [OHS Regs., s. 42(1)]
  • Implement a chemical control program that is appropriate for the risk associated with silica. [OHS Regs., s. 42(2)]
  • Eliminate silica in the workplace, or substitute with a less hazardous product if elimination is not practicable. Where elimination or substitution is not possible, use engineering and administrative controls to make sure that hazardous products are used, stored, and handled safely. Consult the safety data sheet (SDS) or consumer product safety information for advice on suitable controls. [OHS Regs., s. 42(3)(4)(5)] [OHS Regs., s. 45(10)]
  • Isolate workers from air containing silica dust when it is not reasonably practical to prevent silica dust from becoming airborne. [OHS Regs., s. 46(5)]
  • Provide facilities for workers to effectively cleanse contaminated body areas if workers may be exposed to chemicals harmful to the skin or eyes, including emergency water baths, showers, jump tanks, eyewash facilities, or other effective means of treatment. [OHS Regs., s. 42(11)]
  • Keep workers informed of the nature and degree of health effects that could result from being exposed to silica dust and that smoking increases the risk of developing these health effects. [OHS Regs., s. 42(7)(b)] [OHS Regs., s. 46(10)]
  • Prevent silica dust from becoming airborne as much as possible, except when sandblasting, by using: [OHS Regs., s. 46(3)]
    • Total or partial enclosure of the process;
    • Efficient local exhaust ventilation;
    • Jets or sprays of water or another suitable wetting agent; and
    • Another method considered suitable by OHS Division.

Silica flour

Employers must:

Abrasive blasting enclosures

For abrasive blasting processes that use abrasives containing silica, such as sand, employers must: [OHS Regs., s. 46(12)]

  • Perform abrasive blasting inside an abrasive blasting enclosure, if the article being blasted can be safely used inside an enclosure.
  • Not use sand or another substance containing more than 1% respirable dust by weight inside an abrasive blasting enclosure.
  • Not perform abrasive blasting underground.

Always use a blasting enclosure when blasting objects that could create airborne silica dust, including blasting casting and gravestones. [OHS Regs., s. 46(13)]

Where abrasive blasting is performed inside a blasting enclosure using a silica containing abrasive, employers must:

  • Only use the blasting enclosure to: [OHS Regs., s. 46(13)]
    • Perform abrasive blasting,
    • Perform work directly related to abrasive blasting; and
    • Clean and repair the enclosure and equipment inside the enclosure.
  • Make sure a blasting enclosure that may contain silica dust: [OHS Regs., s. 46(14]
    • Is constructed, operated, and maintained to prevent dust from escaping.
    • Is in operation when workers are inside the chamber.
    • Has an efficient dust extraction system that is operated continuously when the enclosure is in use, even when blasting is not currently happening.
    • Has a dust extraction system capable of separating the abrasive from other dusts, if possible, and that does not reintroduce the abrasive into the blasting apparatus again until it is separated.
    • Is inspected by a competent person once a week, when it is used for abrasive blasting.
    • Is thoroughly inspected and tested by a competent person once a month. This inspection must include the enclosure, ventilation system and connected apparatus.
    • Is repaired without delay when defects are found during an inspection.
    • Have records of inspection and testing.
  • Make sure an enclosure apparatus that may contain silica dust: [OHS Regs., s. 46(4)(a)]
    • Is inspected and maintained by a competent person once a week.
    • Is certified by a competent person at least once every calendar year.

Ventilation, dust extraction and dust-separating systems

Employers must:

  • Make sure the air in the workplace is clean and adequate for the number of workers and work processes. [OHS Regs., s. 45(1)]
  • Provide and maintain a ventilation system(s) where a work process may give off airborne emissions, such as silica. This system must protect workers against inhaling airborne silica dust and prevent it from accumulating in the workplace [OHS Regs., s. 45(2)]
  • Install and maintain local exhaust ventilation near the source of an airborne silica hazard to prevent it from entering the worker’s breathing zone and from spreading throughout the workplace, where possible. [OHS Regs., s. 45(3)]
  • Make sure ventilation systems: [OHS Regs., s. 45(1)] [OHS Regs., s. 45(11)]
    • Meet the standards set by ASHRAE and ACGIH.
    • Meet the requirements of the Canadian Electrical Code.
    • Have electrical and mechanical components designed to control all potential ignition sources.
  • Make sure all ventilation systems are exhausted clear of the workplace in a way that prevents airborne silica from re-entering. [OHS Regs., s. 45(4)]
  • Make sure ventilating fans are placed in a way to prevent the recirculation of contaminated air. [OHS Regs., s. 45(9)(d)]
  • Provide effective methods to collect the silica dust removed by a ventilation system, dust extraction system or separating system and prevent this dust from re-entering the workplace. [OHS Regs., s. 46(4)(b)]
  • Make sure every silica filtering or settling device is completely separated from the general ventilation system for a workplace using an enclosure ventilated to the outside air. [OHS Regs., s. 46(4)(b)]
  • Maintain and inspect local exhaust ventilation equipment that is used to contain silica dust once a week. [OHS Regs., s. 46(4)(a)]
  • Make sure exhaust ventilation equipment that is used to contain silica dust is certified by a competent person at least once every calendar year. [OHS Regs., s. 46(4)(a)]
  • Make sure all parts of a ventilation system, including louvers and filters, are maintained by qualified people, and make sure all openings (e.g., exhaust vents and supply diffusers) are clean and unobstructed. [OHS Regs., s. 45(5)] [OHS Regs., s. 45(9)(b)]
  • Make sure ventilation systems are constructed and maintained to minimize the presence of micro-organisms, insects, and mites. [OHS Regs., s. 45(9)(a)(i)]
  • Make sure ventilation systems are accessible for cleaning and inspection, where practical. [OHS Regs., s. 45(9)(a)(ii)]
  • Keep records of inspections, maintenance, and cleaning of the ventilation systems. [OHS Regs., s. 45(9)(c)]
  • Provide records of inspections, maintenance, and cleaning of the ventilation systems to the Occupational Health and Safety Committee, WHS Representative or Designate, when requested. [OHS Regs., s. 45(9)(c)]
  • Measure the air volume of a ventilation system at suitable intervals to make sure it complies with the minimum air volume requirements set by ASHRAE, ACGIH, or another standard approved by OHS Division. [OHS Regs., s. 45(9)(e)]

Housekeeping

An employer must make sure the workplace is sanitary and kept as clean as is reasonably practical. [OHS Regs., s. 67]

Where silica dust may be present, the employer must: [OHS Regs., s. 37] [OHS Regs., s. 46(8) and (17)]

  • Only use vacuuming or hosing with water to clean an abrasive blasting enclosure, apparatus, ventilation system, dust extraction system, dust separating system, or their surroundings.
  • Make sure that areas where silica dust accumulates are regularly cleaned by HEPA vacuuming. Methods other than HEPA vacuuming should only be used where HEPA vacuuming is not practical.
  • Make sure that compressed air is not used to clean clothes, machinery, work benches, or floors.
  • Take precautions to eliminate or reduce the amount of silica dust that is made airborne or inhaled during cleaning of an abrasive blasting enclosure, apparatus, ventilation system, dust extraction system, dust separating system, or their surroundings.

Airborne silica exposure limits

Where workers may be exposed to airborne silica dust, employers must:

Personal protective equipment

Where silica hazards cannot be adequality reduced by engineering or administrative controls or these controls are not practical, employers must: [OHS Regs., s. 46(6), (7) and (15)] [OHS Regs., s. 72] [OHS Regs., S. 84(1) and (2)]

  • Provide workers with respiratory protection appropriate to the degree of exposure. Make sure respiratory protection is properly fitted to the worker.
  • Make sure workers use or wear respiratory protection. Make sure workers are provided with and wear protective clothing, such as coveralls or an abrasive blast suit, that protects the worker and their personal clothing from silica dust.
  • Instruct workers on how to properly use personal protective equipment (PPE), including respiratory protection and protective clothing, and why this equipment is needed before requiring workers to use them.
  • Make sure that PPE is regularly inspected, cleaned (by vacuum or wet methods), and maintained.

Where a worker enters into an abrasive blasting enclosure, regardless of whether abrasive blasting is in progress, the employer must: [OHS Regs., s. 46(15) and (16)] [OHS Regs., s. 84(3) and (4)]

  • Provide workers with and ensure they wear a blasters’ helmet, gauntlets and coveralls.
  • Make sure a blasters helmet is supplied with no less than six cubic feet per minute of clean air that is not unreasonably cold.
  • Make sure that breathing air and systems used to supply breathable air to a blasters helmet is maintained in accordance with CSA Code Z180.1 Compressed breathing air and systems.
  • Make sure compressed oxygen is not used in atmosphere-supplying respirators, including blasters helmets, that have previously used compressed air.

Where respiratory protection equipment is used, including a blasters helmet, employers must:

  • Establish and maintain a written respiratory protection program which complies with the CSA Standard Z94.4 Selection, use and care of respirators. [OHS Regs., s. 83]
  • Place warning signs at all access points displaying the name of the hazard and that respiratory protection equipment is required beyond this point. [OHS Regs., s. 84(5)]
  • Select and provide appropriate respiratory protection. Respiratory protection must be certified by the NIOSH and must be selected based on the respiratory hazards present (e.g., chemical composition and physical state), the worker’s potential exposure, and user factors that will affect performance and reliability. [OHS Regs., s. 85(1), (2), and (3)]
  • Take immediate precautions to protect workers from immediate danger if a respiratory hazard cannot be identified. [OHS Regs., s. 85(4)]
  • Do not allow workers to wear respirators with a tight-fitting facepiece if their hair, facial hair, or another condition that could hinder the effectiveness of the seal of the facepiece or valve function. Acceptable and unacceptable facial hair is established by the CSA standard. [OHS Regs., s. 85(5)]
  • Make sure workers who wear prescription glasses or goggles, or another type of PPE wear their tight-fitting respirator in a way that does not interfere with the seal of the facepiece. [OHS Regs., s. 85(6)]
  • Make sure workers using a tight-fitting respirator perform a seal fit check before each use. [OHS Regs., s. 85(7)]
  • Make sure workers keep respiratory protection sanitary by cleaning and disinfecting, as often as is necessary, and between users if the respiratory protection is shared. [OHS Regs., s. 86(1) and (2)]
  • Make sure respiratory protection is inspected before each use and after cleaning. [OHS Regs., s. 86(3)(a)]
  • Make sure emergency respiratory protection is checked for proper function before and after each use. Emergency respirator protection must also be inspected at least once a month, following the manufacturer's recommendations. [OHS Regs., s. 86(3)(b)]
  • Make sure respiratory protection that is used for emergency escape only is inspected before it is brought into the workplace for use. [OHS Regs., s. 86(3)(c)]
  • Make sure the respiratory protection is removed from service if an inspection or check reveals any damage. [OHS Regs., s. 86(4)]

Health Surveillance

Where workers are exposed to silica dust hazards, employers must:

Supervisor Responsibilities

Supervisors must:

  • Make all reasonable efforts to protect the health, safety, and welfare of the workers under their supervision. [OHS Act, s. 5.1]
  • Advise workers under their supervision of present and potential workplace hazards, and provide written or oral instructions about safety precautions that must be followed. [OHS Act, s. 5.2(a)(b)]
  • Make sure the workers under their supervision use or wear personal protective equipment (PPE) and safety devices required for their protection. [OHS Act, s. 5.2(c)]

Worker Responsibilities

Workers must:

  • Make all reasonable efforts to protect their own health and safety, and that of workers and other persons at, or near, the workplace. [OHS Act, s. 6]
  • Cooperate with the employer and co-workers to protect the health and safety of everyone in the workplace. [OHS Act, s. 7(a)]
  • Consult and cooperate with the OHS Committee, WHS Representative, or Designate. [OHS Act, s. 7(b)]
  • Cooperate with a person exercising a duty imposed by the OHS Act or Regulations, such as an OHS Officer. [OHS Act, s. 7(c)]
  • Use or wear all necessary PPE and safety devices according to manufacturers’ instructions and training. [OHS Act, s. 7(a.1)] [OHS Regs., s. 17(1)]
  • Follow safe work practices and procedures. [OHS Regs., s. 17(2)]
  • Immediately report hazards to the supervisor or employer. [OHS Regs., s. 17(3)]
  • Wear a blasters helmet whenever entering into a blasting enclosure. [OHS Regs., s. 46(15)]

Physician Responsibilities

Where a physician performs health surveillance of a worker exposed to silica dust, the physician must:

  • Record in the log the date and nature of the certificate they issue to each worker they examine. [OHS Regs., s. 46(19)]
  • Notify the worker of their medical results as part of the health surveillance for silica and provide necessary explanation of their results. [OHS Regs., s. 47(7)(a)]
  • Notify the employer of the general outcome of the worker’s health surveillance for silica and provide advice on the need for remedial actions. [OHS Regs., s. 47(7)(b)]
  • Notify the minister if a prescribed adverse health effect that is consistent with silica exposure is detected. [OHS Regs., s. 47(7)(c)]

Initial health assessments must include: [OHS Regs., s. 47(5)]

  • An occupational history;
  • A respiratory questionnaire;
  • A pulmonary/lung function test;
  • A chest x-ray (i.e. full size posteroanterior view); and
  • A medical history and physical examination emphasizing the respiratory system.

Periodic health assessments must include: [OHS Regs., s. 47(6)]

  • Chest x-rays at the frequency set by the Silica Code of Practice;
  • A medical respiratory system examination once every two years unless a physician prescribes otherwise; and
  • Pulmonary (lung) functions tests, including FEV1, FVC, and DLCO standardized for alveolar volume, once every year unless a physician prescribes otherwise.

OHS Division

OHS Division has the authority to:

  • Inquire into the use of silica in the workplace and prohibit, restrict, or modify the use of silica until the employer can prove that the use or presence of silica does not negatively affect worker health. [OHS Regs., s. 42(6)]
  • Designate a workplace or class of workplace as requiring an occupational health surveillance program or requiring modifications to an occupational health surveillance program. [OHS Regs., s. 43(3)]
  • Require a worker to undergo a medical examination as part of a health surveillance program, if the examination is necessary for preventing occupational disease. [OHS Regs., s. 43(5)]
  • Require the employer to provide, without loss of pay, temporary alternative work, where a physician has advised the OHS Division that a hazardous product negatively impacted the health of a worker and they require temporary removal or accommodation. [OHS Regs., s. 43(7)]

Related Topics

Abrasive blasting

The cleaning, smoothing, roughening or removing of part of the surface of an article by the use as an abrasive of a jet of sand, metal shot or grit or other material propelled by compressed air or steam or by a wheel.

Silica flour

The ground material produced by the milling of siliceous rocks or other siliceous substances, including diatomite (Kieselguhr, diatomaceous earth). Also known as micro silica or nano silica.

Silica dust

Dust of respirable particle size and composed substantially of uncombined silica (Silicon Dioxide, SiO2).

Threshold Limit Values (TLVs)

Threshold limit values represent conditions under which it is believed that nearly all workers may be repeatedly exposed, day after day, over a working lifetime, without adverse health effects.

Risk assessment

A risk assessment is a thorough check of the work environment and task before work begins.
The purpose is to identify potential hazards and appropriate safety measures to be used to eliminate or reduce the hazards.

Safety Data Sheet

A safety data sheet (SDS) provided by a supplier that contains information required by the Hazardous Products Act (Canada), including potential hazards of a hazardous substance, instructions on how to work safely with it, and actions to take in an emergency. A SDS should not be confused with the label; as it contains much more detailed information.
Before using a hazardous product, it's essential to conduct a risk assessment by reading and fully understanding the SDS.[WHMIS Regs., s. 2(s]

ASHRAE

ASHRAE, founded in 1894, is a global society advancing human well-being through sustainable technology for the built environment. The Society and its members focus on building systems, energy efficiency, indoor air quality, refrigeration and sustainability within the industry. Through research, standards writing, publishing and continuing education, ASHRAE shapes tomorrow’s built environment today. ASHRAE was formed as the American Society of Heating, Refrigerating and Air-Conditioning Engineers by the merger in 1959 of American Society of Heating and Air-Conditioning Engineers (ASHAE) founded in 1894 and The American Society of Refrigerating Engineers (ASRE) founded in 1904.

https://www.ashrae.org/

Canadian Electrical code

The Canadian Electrical Code, Part I has been developed and updated to help better protect electrical workers and promote improved consistency in electrical installations across the country. It can be purchased at
https://www.csagroup.org/store/product/CSA%20C22.1%3A21/

Occupational Health and Safety Committee

Where 10 or more workers are employed at a workplace, the employer shall establish an occupational health and safety committee to monitor the health, safety and welfare of the workers employed at the workplace. [OHS Act, s. 37]
A committee shall consist of 2 to 12 persons. Where the employer and workers cannot agree on the size of the committee, the minister may establish its size. [OHS Act, s. 38]
At least half of the members are to be persons representing the workers who are not connected with the management. The persons representing the workers are to be elected by other workers or appointed in accordance with the constitution of the union of which the workers are members.
The employer shall appoint sufficient employer representatives to ensure that the committee may function.
The employer and worker members of a committee shall elect a co-chairperson from their respective groups.
The employer shall post the names of the committee members in a prominent place at the workplace.
A committee:
  • Shall seek to identify aspects of the workplace that may be unhealthy or unsafe;
  • Shall participate in a workplace inspection that an employer is required by the regulations to conduct;
  • May make recommendations to principal contractors, employers, workers, self-employed persons and the Assistant Deputy Minister or an Officer for the enforcement of standards to protect the health, safety and welfare of workers at the workplace;
  • Shall receive complaints from workers as to their concerns about the health and safety of the workplace and their welfare;
  • Shall establish and promote health and safety educational programs for workers;
  • Shall maintain records as to the receipt and disposition of complaints received from workers;
  • Shall co-operate with the Assistant Deputy Minister or an Officer who is exercising his or her duties under the act; and
  • Shall perform those other duties and follow those procedures that may be prescribed by the regulations. [OHS Act, s. 39]
Meetings of a committee shall take place during regular working hours at least once every 3 months and a worker is not to suffer loss of pay or other benefits while engaged in a meeting of a committee. [OHS Act, s. 40]

Worker Health and Safety Representative

Where less than 10 workers are employed at a workplace, the employer shall ensure that a worker not connected with the management of the workplace is designated as the worker health and safety representative to monitor the health, safety and welfare of workers employed at the workplace.
[OHS Act, s. 41]
The worker health and safety representative is to be elected by other workers at the workplace or appointed in accordance with the constitution of the labour union of which the workers are members. [OHS Act, s. 42]
The employer shall post the name of the worker health and safety representative in a prominent place at the workplace. [OHS Act, s. 43]
A worker health and safety representative has the same duties as those imposed upon a committee where that is reasonably practicable. [OHS Act, s. 44]
A worker health and safety representative shall consult with his or her employer while performing his or her duties. [OHS Act, s. 44]

Workplace Health and Safety Designate

Where less than 6 persons are engaged at a workplace and the designation of a worker health and safety representative is impracticable, the employer may designate a workplace health and safety designate to monitor the health, safety and welfare of workers employed at the workplace. [OHS Act, s. 42]
The workplace health and safety designate shall be appointed by the employer. The workplace health and safety designate may be either a worker connected with the management of the workplace; or the employer, if the designation of a worker connected with the management of the workplace is not practicable. [OHS Act, s. 42]
If the assistant deputy minister or an officer is of the opinion that a workplace health and safety designate cannot adequately monitor the health, safety and welfare of workers employed at the workplace, the assistant deputy minister or officer shall order, in writing, that a worker health and safety representative be designated. [OHS Act, s. 42]
The employer shall provide and pay for training for the workplace health and safety designate. The training provided shall meet the requirements that the Workplace Health and Safety Compensation Commission may set. An employer shall compensate a worker for participating in training as if the training were regular work. [OHS Act, s. 42]
The workplace health and safety designate shall participate in the training provided. [OHS Act, s. 42]
The employer shall post the name of the worker health and safety designate in a prominent place at the workplace. [OHS Act, s. 43]
A worker health and safety designate has the same duties as those imposed upon a committee where that is reasonably practicable. [OHS Act, s. 44]
A worker health and safety designate, where the workplace health and safety designate is not the employer, shall consult with his or her employer while performing his or her duties. Where the workplace health and safety designate is the employer, he or she shall consult with the workers while performing his or her duties. [OHS Act, s. 44]

HEPA filters

A high efficiency particulate aerosol filter that is at least 99.97 percent efficient in collecting a 0.3 micrometre aerosol. [Asbestos Abatement Regs., s. 3(j)]

ACGIH (American Conference of Governmental Industrial Hygienists)

The American Conference of Governmental Industrial Hygienists (ACGIH) is a scientific organization that develops occupational exposure limits for chemical and physical hazards. These limits can be found in their TLVs® and BEIs® book.
In Newfoundland and Labrador, acceptable occupational exposure limits are established by the ACGIH.

Time weighted average (TWA)

The time weighted average concentration for a conventional 8 hour workday and a 40 hour workweek, to which it is believed that nearly all workers may be repeatedly exposed day after day, over a working lifetime, without adverse health effects.

Short-term exposure limit (STEL)

A 15 minute time weighted average exposure that should not be exceeded at any time during the workday, even if the 8 hour TWA is within the TLV-TWA.

The TLV-STEL is this the concentration at which it is believed that nearly all workers can be exposed continuously for a short period of time without suffering from  (1) irritation; (2)chronic or irreversible tissue damage;(3) dose-rate-dependent toxic effects; or (4) narcosis if sufficient degree to increase the likelihood of accidental injury, impaired self-rescue or materially reduced work efficacy.

Exposures up to the TLV-STEL should be less than 15 minutes, should occur no more than four times per day, and there should be at least 60 minutes between successive this range.

Ceiling limit (C)

The concentration that should not be exceeded during any part of the working exposure.

CSA

CSA is the Canadian Standards Association Group. Certain CSA standards are available for online viewing.
To access these, you must first create an account with "CSA Communities".
Go to: https://community.csagroup.org/login.jspa?referer=%252Findex.jspa
Once you are logged in, click on the text below the "OHS Standards / View Access" graphic.
Click on the jurisdiction of your choice to see the CSA Standards as referenced in that legislation.
Standards may also be purchased from CSA Group: https://store.csagroup.org/

National Institute for Occupational Safety and Health (NIOSH)

The National Institute for Occupational Safety and Health (NIOSH) is a research agency that is focused on the study of worker safety and health.

OCCUPATIONAL HEALTH AND SAFETY ACT
R.S.N.L. 1990, c. O-3

Section 4 Employers' general duty

4. An employer shall ensure, where it is reasonably practicable, the health, safety and welfare of his or her workers.

Section 5 Specific duties of employers

5. Without limiting the generality of section 4, an employer

(a) shall, where it is reasonably practicable, provide and maintain a workplace and the necessary equipment, systems and tools that are safe and without risk to the health of his or her workers;

(b) shall, where it is reasonably practicable, provide the information, instruction, training and supervision and facilities that are necessary to ensure the health, safety and welfare of his or her workers;

(c) shall ensure that his or her workers, and particularly his or her supervisors, are made familiar with health or safety hazards that may be met by them in the workplace;

(d) shall, where it is reasonably practicable, conduct his or her undertaking so that persons not in his or her employ are not exposed to health or safety hazards as a result of the undertaking;

(e) shall ensure that his or her workers are given operating instruction in the use of devices and equipment provided for their protection;

(f) shall consult and co-operate with the occupational health and safety committee, the worker health and safety representative or the workplace health and safety designate, where the employer is not the workplace health and safety designate, on all matters respecting occupational health and safety at the workplace;

(f.1) shall respond in writing within 30 days to a recommendation of

(i) the occupational health and safety committee at the workplace,

(ii) the worker health and safety representative at the workplace, or

(iii) where the employer is not the workplace health and safety designate, the workplace health and safety designate at the workplace

indicating that the recommendation has been accepted or that it has been rejected, with a reason for the rejection;

(f.2) shall provide periodic written updates to

(i) the occupational health and safety committee at the workplace,

(ii) the worker health and safety representative at the workplace, or

(iii) where the employer is not the workplace health and safety designate, the workplace health and safety designate at the workplace

on the implementation of a recommendation accepted by the employer until the implementation is complete;

(f.3) shall consult with

(i) the occupational health and safety committee at the workplace,

(ii) the worker health and safety representative at the workplace, or

(iii) where the employer is not the workplace health and safety designate, the workplace health and safety designate at the workplace

about the scheduling of workplace inspections that are required by the regulations, and ensure that the committee, the worker health and safety representative or the workplace health and safety designate participates in the inspection; and

(g) shall co-operate with a person exercising a duty imposed by this Act or regulations.

[S.N.L. 1999, c. 28, s. 2; 2001, c. 10, s. 25; 2004, c. 52, s. 1]

Section 5.1 Supervisors' general duty

5.1 A supervisor shall ensure, where it is reasonably practicable, the health, safety and welfare of all workers under his or her supervision.

[S.N.L. 2009, c. 19, s. 2]

Section 5.2 Specific duties of supervisors

5.2 A supervisor shall

(a) advise workers under his or her supervision of the health or safety hazards that may be met by them in the workplace;

(b) provide proper written or oral instructions regarding precautions to be taken for the protection of all workers under his or her supervision; and

(c) ensure that a worker under his or her supervision uses or wears protective equipment, devices or other apparel that this Act, the regulations or the worker's employer requires to be used or worn.

[S.N.L. 2009, c. 19, s. 2]

Section 6 Workers' general duty

6. A worker, while at work, shall take reasonable care to protect his or her own health and safety and that of workers and other persons at or near the workplace.

Section 7 Specific duties of workers

7. A worker

(a) shall co-operate with his or her employer and with other workers in the workplace to protect

(i) his or her own health and safety,

(ii) the health and safety of other workers engaged in the work of the employer,

(iii) the health and safety of other workers or persons not engaged in the work of the employer but present at or near the workplace;

(a.1) shall use devices and equipment provided for his or her protection in accordance with the instructions for use and training provided with respect to the devices and equipment;

(b) shall consult and co-operate with the occupational health and safety committee, the worker health and safety representative or the workplace health and safety designate at the workplace; and

(c) shall co-operate with a person exercising a duty imposed by this Act or regulations.

[S.N.L. 1999, c. 28, s. 3; 2001, c. 10, s. 26; 2004, c. 52, s. 2]

Section 37 Committees

37. Where 10 or more workers are employed at a workplace, the employer shall establish an occupational health and safety committee to monitor the health, safety and welfare of the workers employed at the workplace.

[S.N.L. 1999, c. 28, s. 9]

Section 38 Membership of committees

38. (1) A committee shall consist of the number of persons that may be agreed to by the employer and the workers but shall not be less than 2 nor more than 12 persons.

(2) At least half of the members of a committee are to be persons representing the workers at the workplace who are not connected with the management of the workplace.

(3) The persons representing the workers on the committee are to be elected by other workers at the workplace or appointed in accordance with the constitution of the union of which the workers are members.

(4) Where the employer and workers cannot agree on the size of the committee, the minister may establish its size.

(5) The employer shall appoint sufficient employer representatives to ensure that the committee may function.

(6) The employer and worker members of a committee shall elect a co- chairperson from their respective groups.

(7) The employer shall post the names of the committee members in a prominent place at the workplace.

Section 39 Duties of committees

39. A committee established under section 37

(a) shall seek to identify aspects of the workplace that may be unhealthy or unsafe;

(a.1) shall participate in a workplace inspection that an employer is required by the regulations to conduct;

(b) may make recommendations to principal contractors, employers, workers, self-employed persons and the assistant deputy minister or an officer for the enforcement of standards to protect the health, safety and welfare of workers at the workplace;

(c) shall receive complaints from workers as to their concerns about the health and safety of the workplace and their welfare;

(d) shall establish and promote health and safety educational programs for workers;

(e) shall maintain records as to the receipt and disposition of complaints received from workers under paragraph (c);

(f) shall co-operate with the assistant deputy minister or an officer who is exercising his or her duties under the Act; and

(g) shall perform those other duties and follow those procedures that may be prescribed by the regulations.

[S.N.L. 2001, c. 10, s. 29]

Section 40 Meetings of committee

40. Meetings of a committee shall take place during regular working hours at least once every 3 months and a worker is not to suffer loss of pay or other benefits while engaged in a meeting of a committee.

Section 41 Worker representative

41. (1) Where less than 10 workers are employed at a workplace, the employer shall ensure that a worker not connected with the management of the workplace is designated as the worker health and safety representative to monitor the health, safety and welfare of workers employed at the workplace.

(2) The employer shall provide and pay for training for the worker health and safety representative.

(3) The training provided under subsection (2) shall meet the requirements the Workplace Health Safety and Compensation Commission may set.

(4) The worker health and safety representative shall participate in the training provided under this section.

(5) An employer shall compensate a worker for participating in training under this section as if the training were regular work.

[S.N.L. 2001, c. 10, s. 30; 2004, c. 47, s. 27]

Section 42 Election of representative

42. The worker health and safety representative is to be elected by other workers at the workplace or appointed in accordance with the constitution of the labour union of which the workers are members.

Section 43 Posting name

43. The employer shall post the name of the worker health and safety representative or the workplace health and safety designate in a prominent place at the workplace.

[S.N.L. 2004, c. 52, s. 9]

Section 44 Duties of representative

44. (1) A worker health and safety representative or the workplace health and safety designate has the same duties as those imposed upon a committee under section 39, where that is reasonably practicable.

(2) A worker health and safety representative or the workplace health and safety designate, where the workplace health and safety designate is not the employer, shall consult with his or her employer while performing his or her duties under subsection (1).

(3) Where the workplace health and safety designate is the employer, he or she shall consult with the workers while performing his or her duties under subsection (1).

[S.N.L. 2004, c. 52, s. 10]

Occupational Health and Safety Regulations, 2012
N.L.R. 5/12

Part III GENERAL DUTIES

Section 14 General duties of employers

14. (1) An employer shall ensure, so far as is reasonably practicable, that all buildings, structures, whether permanent or temporary, excavation, machinery, workstations, places of employment and equipment are capable of withstanding the stresses likely to be imposed upon them and of safely performing the functions for which they are used or intended.

(2) An employer shall ensure that necessary protective clothing and devices are used for the health and safety of the employer’s workers.

(3) The employer shall ensure that safe work procedures are followed at all workplaces.

(4) An employer shall ensure, so far as is reasonably practicable, that work procedures promote the safe interaction of workers and their work environment to minimize the potential for injury.

[N.L.R. 43/22, s. 3]

Section 17 General duties of workers

17. (1) A worker shall make proper use of all necessary safeguards, protective clothing, safety devices, lifting devices or aids, and appliances

(a) designated and provided for the worker’s protection by the employer; or

(b) required under these regulations to be used or worn by a worker.

(2) A worker shall follow the safe work procedure in which the worker has been instructed.

(3) A worker shall immediately report a hazardous work condition that may come to the worker’s attention to the employer or supervisor.

[N.L.R. 43/22, s. 4]

Part V GENERAL HEALTH AND SAFETY REQUIREMENTS

Section 37 Compressed air

37. Compressed air shall not be used to clean clothes, machinery, work benches or floors.

Section 38 Emergency plan risk assessment

38. (1) An employer shall conduct a risk assessment in a workplace in which a need to rescue or evacuate workers may arise.

(2) Where the risk assessment required by subsection (1) shows a need for evacuation or rescue, appropriate written procedures shall be developed and implemented and a worker assigned to coordinate their implementation.

(3) Written rescue and evacuation procedures are required for but not limited to

(a) work at high angles;

(b) work in confined spaces or where there is a risk of entrapment;

(c) work with hazardous substances;

(d) underground work;

(e) work in close proximity to power lines;

(f) work on or over water; and

(g) workplaces where there are persons who require physical assistance to be moved.

(4) Where a workplace is a low risk workplace in the opinion of an employer, the employer shall post information about escape routes and conduct emergency drills the employer considers appropriate.

[N.L.R. 43/22, s. 10]

Part VI OCCUPATIONAL HEALTH REQUIREMENTS

Section 42 Hazardous substances

42. (1) An employer shall monitor the use or presence of substances at the workplace that may be hazardous to the health and safety of workers.

(2) In accordance with subsection (1), an employer shall implement a chemical and biological control program commensurate with the associated risks.

(3) In accordance with subsection (1), an employer shall eliminate hazardous substances from the workplace and where this is not practicable substitute a less hazardous substance.

(4) Where hazardous substances exist, an employer shall employ engineering and administrative controls to ensure their safe use.

(5) An employer shall ensure that a substance produced, used or handled at a workplace which by reason of toxicity, flammability or reactivity creates a risk to the health or safety of workers is controlled in accordance with the Safety Data Sheet or manufacturer's specifications.

(6) Where the minister determines that the use or presence of a hazardous substance at a place of employment may be injurious to the health of workers, the minister may inquire into the substance and may prohibit, restrict or modify the use of the substance until a time that an employer establishes to the minister that its use or presence is not injurious to the health of workers.

(7) An employer shall ensure that

(a) atmospheric contamination of the workplace by hazardous substances is kept as low as is reasonably practicable;

(b) a worker is informed of the nature and degree of health effects of the hazardous substances to which the worker is exposed;

(c) exposure of a worker to hazardous substances is as minimal as is reasonably practicable, and where a threshold limit value has been established by the ACGIH, exposure shall not exceed the threshold limit value;

(d) except as otherwise determined by the division, a worker is not exposed to a substance that exceeds the ceiling limit, short-term exposure limit or 8-hour TWA (time weighted average) limit prescribed by ACGIH; and

(e) where a substance referred to in paragraph (d) has an 8-hour TWA limit, a worker's exposure to the substance does not exceed

(i) 3 times the 8-hour TWA limit for more than a total of 30 minutes during the work period, and

(ii) 5 times the 8-hour TWA limit.

(8) Where extended work periods exist where the work period is more than 8 hours in a 24 hour day, the 8 hour exposure shall be adjusted accordingly as outlined in the ACGIH "Threshold Limit Values (TLVs)" Manual.

(9) Adjustment of TLVs, as required, shall be done in consultation with the occupational health and safety committee, the worker health and safety representative or the workplace health and safety designate, as appropriate.

(10) Where a worker is exposed to a substance which is designated as a reproductive toxin or a sensitizer, an employer shall develop policy and procedures appropriate to the risk, which may include protective reassignment.

(11) Where workers may be exposed to contact with chemicals harmful to the skin, facilities shall be available for the worker to effectively cleanse the contaminated body areas, including, where corrosive chemicals are involved, emergency water baths, showers, jump tanks, eyewash facilities or other effective means of treatment.

(12) The policy and procedures required by subsection (10) shall include

(a) informing workers about the reproductive toxin and identifying ways to minimize exposure to the toxin for a worker who has advised the employer of pregnancy or intent to conceive a child; and

(b) identifying ways to eliminate exposure to a sensitizer for a worker who is or may become sensitized to that substance.

(13) Solvents, oils, greases, paints or other flammable substances shall be cleaned up by using an approved non-combustible grease and oil absorbent which shall be placed in covered metal containers before disposal.

(14) Containers referred to in subsection (13) shall not be stored in work areas.

[S.N.L. 2019, c. 8, s. 20]

Section 43 Health surveillance

43. (1) In accordance with subsection 42(2), an employer shall assess the need for and extent of health surveillance of the employer’s workers.

(2) Based on the results of the assessment under subsection (1), an employer shall establish and maintain a program for the surveillance of the health of workers, which shall be in accordance with the following guidelines

(a) the International Code of Ethics for Occupational Health Professionals; and

(b) the International Labour Organization's Technical and Ethical Guidelines for Health Surveillance.

(3) In addition, to subsections (1) and (2), the minister may

(a) designate a workplace or class of workplaces as requiring an occupational health surveillance program; or

(b) make requirements for modifications to an occupational health surveillance program.

(4) An employer shall ensure that an occupational health surveillance program in a workplace is communicated to employees of that workplace.

(5) The minister may require a worker to undergo a medical examination as part of a health surveillance program where it may be necessary for the prevention of occupational disease.

(6) A medical examination shall be performed during normal working hours without loss of pay to workers.

(7) Where the minister has been advised by a physician that a worker has been adversely affected by a hazardous substance in the workplace and requires temporary removal or workplace accommodation from that workplace or hazard, the minister may require the employer to provide without loss of pay to the worker temporary alternative work for the time period required.

(8) An employer shall keep records of a health surveillance program for a period of time specified by the minister, and these records shall be made available to

(a) an employee who requests information pertaining to the employee’s health surveillance records; and

(b) where a physician is no longer able to keep medical records pertaining to an occupational exposure, the minister shall be notified in advance to make alternate arrangements that are in accordance with the guidelines of the College of Physicians and Surgeons of Newfoundland and Labrador regarding the retention and storage of medical records.

[N.L.R. 43/22, s. 12]

Section 45 Ventilation

45. (1) An employer shall ensure that

(a) there is appropriate circulation of clean and wholesome air;

(b) there is adequate ventilation; and

(c) impurities are made harmless and inoffensive

in a workplace in accordance with standards established by ASHRAE and ACGIH.

(2) 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.

(3) 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.

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

(5) An employer shall ensure that,

(a) all parts of a ventilation system are maintained;

(b) louvers are cleaned regularly; and

(c) ventilation openings are free of obstruction and sources of contamination.

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

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

(a) the engine shall be adequately serviced and maintained to minimize the concentration of air contaminants in the exhaust to the applicable ACGIH Standards, and

(b) the work area shall be assessed to determine the potential for exposure of workers to harmful levels of exhaust components.

(8) 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.

(9) An employer, contractor or owner shall ensure that

(a) the mechanical ventilation system

(i) 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;

(b) 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;

(c) a record of all inspections, maintenance and cleaning of the mechanical ventilation system is

(i) 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;

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

(e) 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.

(10) 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.

(11) 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.

Section 46 Silica regulation

46. (1) In this section

(a) "blasting" means the cleaning, smoothing, roughening or removing of part of the surface of an article by the use as an abrasive of a jet of sand, metal shot or grit or other material propelled by compressed air or steam or by a wheel;

(b) "blasting chamber" means a blasting enclosure into which workers enter;

(c) "blasting enclosure" means a chamber, barrel, cabinet or other similar enclosure designed for the purpose of blasting in it;

(d) "cleaning of castings" means, where done as an incidental or supplemental process in connection with the making of metal castings, the freeing of the castings from adherent sand or other substance, and includes the removal of cores and the general smoothing of the castings where the freeing is done, but does not include the freeing of castings from scale formed during annealing or heat treatment;

(e) "sandblasting" means the process of projecting sand by means of compressed air or steam or by a wheel;

(f) "silica dust" means dust of respirable particle size and composed substantially of uncombined silica (Silicon Dioxide SiO2);

(g) "silica flour" means the ground material produced by the milling of siliceous rocks or other siliceous substances, including diatomite (Kieselguhr, diatomaceous earth);

(h) "uncombined silica" means silica which is not combined chemically with another element or compound; and

(i) "use of a parting material" means the application of a material to a surface of a pattern or of a mould to facilitate the separation of the pattern from a mould or the separation of parts of the mould.

(2) The provisions of this section apply wherever workers are employed in a silica process, including

(a) sandblasting;

(b) the cleaning of castings;

(c) the blasting, fettling, grinding or dressing of a surface containing silica, including the engraving or abrasive cleaning of gravestones, buildings or structures of siliceous stones or rocks;

(d) a process in which silica flour is used;

(e) the manufacture of silica-containing refractory bricks or silica-containing substances and the dismantling or repair of the refractory lining of furnaces;

(f) a process which the chief occupational medical officer has reason to believe creates a risk to the health of workers by silica dust; and

(g) a process that includes the getting, cutting, splitting, crushing, grinding, milling, drilling, sieving, or other mechanical manipulation of gravel or siliceous stone or rock where there is potential for exceeding 1% free silica or 50% of TLV.

(3) An employer shall ensure that at every silica process except sandblasting to which subsection (12) applies, the entry into the air of silica dust is prevented where reasonably practicable by the provision of

(a) total or partial enclosure of the process;

(b) efficient local exhaust ventilation;

(c) jets or sprays of water or other suitable wetting agent; and

(d) another method considered suitable by the assistant deputy minister.

(4) An employer shall ensure that

(a) enclosure apparatus and exhaust ventilation equipment used or likely to be used to contain silica dust is maintained and is inspected at least once in every 7 days and is certified by a competent person at least once in every calendar year; and

(b) effective means is provided to collect silica dust removed by exhaust ventilation equipment and to prevent its re-entry into a workroom, and every filtering or settling device situated in a workroom is completely separated from the general air of that workroom in an enclosure ventilated to the open air.

(5) Where it is not reasonably practicable to prevent the entry into the air of silica dust, the employer shall provide for the isolation of the worker from the air containing silica dust.

(6) Where it is not reasonably practicable to prevent the entry into the air of silica dust nor practicable to isolate the worker from the air containing silica dust, and for all cleaning and maintenance work, the employer shall provide for the use of each worker who may be exposed to silica dust

(a) approved respiratory protective equipment; and

(b) protective clothing, including coveralls and headgear, that, when worn, exclude silica dust and that is maintained and cleaned in a safe manner.

(7) A worker shall not be required to perform work for which respiratory protective equipment and clothing is provided unless fully instructed in the need for and proper use of that equipment and clothing.

(8) An employer shall ensure that all places where silica dust may accumulate are regularly cleaned using vacuum methods wherever practicable.

(9) An employer shall ensure that the standard for dust levels does not exceed the threshold limit value (TLV) established by the ACGIH.

(10) A worker who in the course of the worker’s employment is likely to be engaged in a silica process shall be warned by the employer of the danger to the worker’s health of inhaling silica dust and that the risk of injury is made greater by smoking.

(11) Persons under the age of 18 shall not be employed in a silica process nor in cleaning or maintenance work likely to involve exposure to silica dust except work that is a recognized part of apprenticeship or comparable course of training.

(12) An employer shall ensure that

(a) sandblasting is not done outside a blasting enclosure to an article which it is practicable to introduce into a blasting enclosure;

(b) sand or other substance containing more than 1% by weight of respirable dust is not introduced into a blasting enclosure;

(c) sandblasting is not done except with the written permission of the officer and in accordance with the conditions and to the extent that the officer may prescribe; and

(d) sandblasting is not done underground,

and sandblasting shall not be undertaken nor performed by an employer, worker or self-employed person other than those registered for that purpose with the division.

(13) An employer shall ensure where practicable that castings, gravestones and other articles which are liable to give rise to silica dust by blasting are not blasted except in a blasting enclosure, and that work is not performed in a blasting enclosure except blasting and work immediately incidental to that and the cleaning and repairing of the enclosure and of plant and appliances situated in that enclosure.

(14) An employer shall ensure that every blasting enclosure which is liable to contain silica dust is

(a) constructed, operated and maintained to prevent the escape of dust;

(b) provided with an efficient dust extraction system, which is kept in continuous operation whenever the blasting enclosure is in use whether or not blasting is actually taking place, and a blasting chamber is in operation when a worker is inside the chamber;

(c) specially inspected by a competent person once in every week in which it is used for blasting, and the enclosure, the apparatus connected with it and the ventilating plant associated with it is thoroughly examined and tested by a competent person once every month, and all results of required inspection, examinations and tests are recorded and all defects remedied without avoidable delay; and

(d) provided with efficient apparatus for separating where practicable the abrasive from other dust, and the abrasive is not again introduced into the blasting apparatus until it has been separated.

(15) An employer shall provide and maintain for workers who work in a blasting chamber, whether in blasting or other work, protective blasters' helmets supplied with clean and not unreasonably cold air of not less than 6 cubic feet a minute, and the helmets shall be used by workers whenever they are in the blasting chamber.

(16) Suitable gauntlets and coveralls shall be provided for the use of, and shall be worn by, all workers while performing blasting or assisting at blasting, and suitable provision shall be made for the storage, regular cleaning by vacuum and maintenance in good condition of the gauntlets and coveralls.

(17) When a worker is engaged in the cleaning of a blasting apparatus or enclosure, ventilating or separating plant, or the surrounds, all practical measures shall be taken to prevent the inhalation of silica dust or its dissemination into the air and all the cleaning shall be by vacuum or hosing by water whenever practicable.

(18) An employer shall ensure that silica flour

(a) is not manufactured except under standards prescribed by the division;

(b) is not used for a purpose for which a less hazardous substance may be substituted; and

(c) is not used in the manufacture of scouring powder or abrasive soaps or as an abrasive in a process.

(19) The examining physician shall record in the log the date and nature of the certificate the examining physician issues to each worker the examining physician has medically examined.

[N.L.R. 43/22, s. 13]

Section 47 Silica medical surveillance

47. (1) An employer shall establish and maintain a system for the surveillance of the health of employees arising from silica dust exposure in accordance with the silica health surveillance guidance document prescribed by the minister.

(2) An employee who requires silica related health surveillance is one who:

(a) works in an industry where the employee is potentially affected by a silica process as defined in this subsection 46(2);

(b) is potentially exposed to silica levels in excess of the ACGIH TLV- TWA; and

(c) has been determined, through the company's silica control program, to require silica health surveillance as prescribed in the general health surveillance section.

(3) An employer shall not regularly employ a worker in a silica process unless the employer has been assured by a medical practitioner by a written notification that the worker is medically fit for the work being undertaken.

(4) An employer shall keep at the place of employment to be readily available to an officer a log recording the name of every worker referred for medical examination.

(5) The initial health assessment shall be carried out under the direction of a physician and shall include

(a) an occupational history;

(b) a respiratory questionnaire;

(c) a pulmonary/lung function test;

(d) a chest x-ray (Full size PA view); and

(e) a medical history and physical examination emphasizing the respiratory system.

(6) A periodic health assessment shall comply with the following requirements:

(a) the frequency of chest x-rays shall be in accordance with the silica health surveillance document;

(b) the medical examination emphasizing the respiratory system shall be repeated annually unless prescribed otherwise by the physician; and

(c) the pulmonary /lung functions tests including FEV1, FVC, and DLCO standardized for alveolar volume shall be repeated annually unless prescribed otherwise by the physician.

(7) Where an employee is undergoing health surveillance for silica, the physician shall ensure, as soon as practicable, that

(a) the employee is notified of the results, together with a necessary explanation of these results;

(b) the employer is notified of the general outcome of a worker's health surveillance and is advised on the need for remedial actions; and

(c) the minister is notified of a prescribed adverse health effect that had been detected which is consistent with exposure to silica.

(8) Where an employer has been advised by the physician on the need for remedial action, the employer shall, as soon as practicable, re-evaluate the assessment of the employee's exposure to silica and implement the control measures required.

(9) An employer shall ensure employees are informed of the purpose and procedures for health surveillance and make arrangements for employees to participate in the health surveillance program.

[N.L.R. 43/22, s. 14]

Section 67 Sanitary and orderly conditions

67. An employer shall ensure that the workplace is sanitary and kept as clean as is reasonably practicable and that

(a) accumulated dirt and refuse is removed daily by a suitable method from floors, working surfaces, stairways and passages;

(b) floors are cleaned at least once a week by washing, vacuum cleaning or other effective and suitable means;

(c) interior walls and partitions, ceilings, passages and staircases are kept in a reasonable state of repair and suitably finished and maintained; and

(d) floors, platforms, stairs and walkways used by workers are kept in a state of good repair and free of hazards.

Part VII PERSONAL PROTECTIVE EQUIPMENT

Section 72 Instruction

72. An employer shall ensure that a worker who wears personal protective equipment is adequately instructed in the correct use, limitations and assigned maintenance duties for the equipment to be used.

Section 83 Respiratory protection program

83. Where required, an employer shall establish, implement and maintain, and revise where necessary, a written respiratory protection program in accordance with CSA Standard Z94.4 "Selection, Use and Care of Respirators" .

Section 84 Respiratory protection

84. (1) When a worker is or may be exposed to an oxygen deficient atmosphere or harmful concentrations of air contaminants, atmospheric contamination shall be prevented to the extent practicable by accepted engineering controls and when engineering or other controls are not practicable, appropriate respiratory protection equipment shall be used in accordance with this section.

(2) Respiratory protection equipment shall be provided by an employer when the equipment is necessary to protect the health of a worker.

(3) An employer shall ensure that compressed air, compressed oxygen, liquid air and liquid oxygen used for respiration comply with the specifications of CSA Code Z180.1 Compressed Breathing Air and Systems .

(4) An employer shall ensure that compressed oxygen is not used in atmosphere-supplying respiratory equipment that has previously used compressed air.

(5) Access points shall display signs warning that respiratory protection equipment is required and naming the contaminant or hazard involved.

(6) An employer shall ensure that sufficient workers who are trained in rescue procedures are immediately available whenever workers are working in areas where an oxygen deficient atmosphere or hazardous contaminants may be present.

(7) A rescue worker referred to in subsection (6) shall have immediate access to appropriate breathing apparatus or other aids necessary to effect a rescue.

Section 85 Respiratory protection equipment

85. (1) An employer shall select and provide appropriate respiratory protection equipment based on the respiratory hazard to which a worker is exposed and workplace and user factors that affect the performance and reliability of the equipment.

(2) The equipment referred to in subsection (1) shall be certified by the National Institution of Occupational Safety and Health and used in compliance with the conditions of its certification.

(3) An employer shall identify and evaluate the respiratory hazards in the workplace, and the evaluation shall include an employee's potential exposure to respiratory hazards and an identification of the contaminant's chemical composition and physical state.

(4) Where an employer cannot identify the exposure referred to in subsection (3), the employer shall take immediate precautions to protect a worker from immediate danger.

(5) An employer shall not permit a respirator with a tight-fitting facepiece to be worn by an employee who has

(a) hair on the face or scalp that is likely to prevent effective sealing of the facepiece to the facial skin; or

(b) a condition that interferes with the face to facepiece seal or valve function.

(6) Where an employee wears corrective glasses or goggles or other personal protective equipment, the employer shall ensure that the equipment is worn in a manner that does not interfere with the seal of the facepiece to the face of the user.

(7) Where a tight-fitting respirator is used by an employee, an employer shall ensure that the employee performs a user seal check before each use.

Section 86 Inspection and maintenance of respiratory protection equipment

86. (1) Respiratory protection equipment that is issued for the exclusive use of an employee shall be cleaned and disinfected as often as necessary to maintain it in a sanitary condition.

(2) Respiratory protection equipment that is issued for the use of more than one employee shall be cleaned and disinfected before being worn by different individuals.

(3) An employer shall ensure that respiratory protection equipment is inspected as follows:

(a) equipment used in routine situations is inspected before each use and after cleaning;

(b) equipment maintained for use in emergency situations is inspected at least once monthly and according to the manufacturer's recommendations, and is checked for proper function before and after each use; and

(c) emergency escape only equipment is inspected before being carried into the workplace for use.

(4) Where an inspection conducted under subsection (3) reveals damage, the equipment shall be discarded.

Workplace Hazardous Materials Information System (WHMIS) Regulations, 2018
C.N.L.R. 34/18

Section 2 Definitions

2. In these regulations

(a) "bulk shipment" means a shipment of a hazardous product that is contained, without intermediate containment or intermediate packaging, in

(i) a vessel that has a water capacity equal to or greater than 450 litres,

(ii) a freight container, a road vehicle, a railway vehicle or a portable tank,

(iii) the hold of a ship, or

(iv) a pipeline;

(b) "CAS registry number" means the identification number assigned to a chemical by the Chemical Abstracts Service, a division of the American Chemical Society;

(c) "category" includes a subcategory;

(d) "container" includes a bag, barrel, bottle, box, can, cylinder, drum, storage tank or similar package or receptacle;

(e) "education" means the delivery of general information to workers including information applicable to more than one workplace or job;

(f) "fugitive emission" means a gas, liquid, solid, vapour, fume, mist, fog or dust that escapes from process equipment or from emission control equipment or from a product to which workers may be readily exposed;

(g) "hazard information" means information on the proper and safe use, storage and handling of a hazardous product and includes information relating to its health and physical hazards;

(h) "hazardous product" means a product, material, mixture or substance classified by the regulations made under subsection 15(1) of the Hazardous Products Act (Canada) in a category of a hazard class listed in Schedule 2 of that Act;

(i) " Hazardous Products Regulations " means the Hazardous Products Regulations under the Hazardous Products Act (Canada) ;

(j) "hazardous waste" means a hazardous product in the workplace that is acquired or generated for recycling or recovery or is intended for disposal;

(k) "health professional" means

(i) a physician who is registered and entitled under the laws of a province to practise medicine and who is practising medicine under those laws in that province, and

(ii) a nurse who is registered or licensed and entitled under the laws of a province to practise nursing and who is practising nursing under those laws in that province;

(l) "label" means written, printed or graphic information elements relating to a hazardous product which are designed to be affixed to, printed on or attached to the hazardous product or the container in which the hazardous product is packaged;

(m) "laboratory sample" means a sample of a hazardous product packaged in a container that contains less than 10 kilograms of the hazardous product and is intended solely to be tested in a laboratory but does not include a sample that is to be used

(i) by the laboratory for testing other products, materials, mixtures or substances, or

(ii) for education or demonstration purposes;

(n) "manufactured article" means an article that

(i) is formed to a specific shape or design during manufacture, the intended use of which when in that form is dependent in whole or in part on its shape or design, and

(ii) when being installed, if the intended use of the article requires it to be installed, and under normal conditions of use, will not release or otherwise cause a person to be exposed to a hazardous product;

(o) "proceedings" has the same meaning as in subsection 19(3) of the Hazardous Materials Information Review Act (Canada) ;

(p) "product identifier" means, in respect of a hazardous product, the brand name, chemical name, common name, generic name or trade name;

(q) "readily available" means

(i) present in an appropriate place that is known to the workers,

(ii) accessible to workers at all times, and

(iii) in the form of either a physical copy that can be handled or an electronic copy that is easily available in hard copy to workers likely to be exposed to a hazardous product;

(r) "research and development" means a systematic investigation or search carried out in a field of science or technology by means of experiment or analysis, other than the disclosure of source of toxicological data under section 25;

(s) "safety data sheet" means a document that contains the headings required under the regulations made under subsection 15(1) of the Hazardous Products Act (Canada) and information about a hazardous product, including information related to the hazards associated with the use, storage or handling of the hazardous product in the workplace;

(t) "significant new data" means new data regarding the hazard presented by a hazardous product that changes its classification in a category of a hazard class or results in its classification in another hazard class, or changes the ways to protect against the hazard presented by the hazardous product;

(u) "supplier label" means a label provided by a supplier that contains information elements as required by the Hazardous Products Act (Canada)

(v) "supplier safety data sheet" means a safety data sheet provided by a supplier that contains information elements as required by the Hazardous Products Act (Canada) ;

(w) "training" refers to the delivery of workplace and job specific information to workers; and

(x) "workplace label" means a label which discloses

(i) a product identifier which is identical to that found on the safety data sheet of the corresponding hazardous product,

(ii) information for the safe handling (ii) information for the safe handling of the hazardous product which is conveyed in a manner appropriate to the workplace, and

(iii) that a safety data sheet for the hazardous product, where one has been obtained from a supplier or prepared by the employer, is available.

Asbestos Abatement Regulations, 1998
N.L.R. 111/98

Section 3 Definitions

3. In these regulations

(a) "Act" means the Occupational Health and Safety Act;

(b) "amended water" means water to which a wetting agent has been added in accordance with manufacturers specifications;

(c) "asbestos" means any of the following fibrous silicates: actinolite, amosite, anthophyllite, chrysotile, crocidolite or tremolite;

(d) "asbestos abatement training course" means a course of training with content equivalent to that outlined in Schedule A and provided by a training organization acceptable to the assistant deputy minister;

(e) "asbestos dust" means airborne particles of asbestos or settled particles of asbestos which are liable to become airborne in the working environment;

(f) "asbestos material" means material containing greater than 1% asbestos by dry weight;

(g) "exposure to asbestos" means exposure at work to airborne respirable asbestos fibres or asbestos dust, whether originating from asbestos minerals, materials or products;

(h) "fibre/cm3" means fibres per cubic centimetre;

(i) "friable material" means material that when dry can be crumbled, pulverized or powdered by hand pressure and includes the material that is crumbled, pulverized or powdered;

(j) "HEPA filters" means a high efficiency particulate aerosol filter that is at least 99.97% efficient in collecting a 0.3 micrometre aerosol;

(k) "owner" means a trustee, receiver, tenant or occupier or a person for whose direct benefit on completion work is being done;

(l) "polyethylene sheeting" shall be considered to be no less than 6 millimetre thickness;

(m) "qualified contractor" means principal contractor as defined in the Act and for purposes of these regulations has one or more persons on staff qualified in asbestos abatement;

(n) "qualified person" means a person who has successfully completed a course in asbestos abatement acceptable to the assistant deputy minister according to Schedule A;

(o) "respirable asbestos fibres" means asbestos fibres having a diameter of less than 3 um and a length-to-diameter ratio greater than 3:1 and only fibres of a length greater than 5 um shall be taken into account for purposes of measurement; and

(p) "um" means micrometre.