CANJEM
Occupational exposure information system
Select Substance from List ↴
overview
CANJEM
Substance List
  • Inorganic substances
    • Inorganic dusts
      • Abrasives dust
        • Abrasives dust
        • Cristalline silica
        • Alumi
        • Silicon carbide
      • Inorganic insulation dust
        • Inorganic insulation dust
        • Chrysotile asbestos
        • Amphibole asbestos
        • Glass fibres
        • Mineral wool fibres
      • Metallic dust
        • Metallic dust
        • Bronze dust
        • Brass dust
        • Stainless steel dust
        • Mild steel dust
      • Inorganic pigments
        • Inorganic pigments
        • Titanium dioxide
        • Iron oxides
        • Zinc oxide
        • Lead oxides
        • Basic lead carbote
        • Lead chromate
      • Extenders
        • Extenders
        • Industrial talc
        • Clay dust
        • Mica
        • Cosmetic talc
        • Calcium carbonate
      • Construction material dusts
        • Portland cement
        • Brick dust
        • Concrete dust
        • Refractory brick dust
        • Calcium oxide
        • Calcium sulphate
      • Other inorganic dust
        • Glass dust
        • Ashes
        • Sodium carbote
        • Sodium hydrosulphite
        • Sulfur
    • Inorganic gases
      • Inorganic acids
        • Hydrogen fluoride
        • Hydrogen sulphide
        • Hydrogen chloride
      • Nitrogen oxides
        • Nitrogen oxides
      • Other inorganic gases
        • Hydrogen
        • Carbon monoxide
        • Sulphur dioxide
        • Chlorine
        • Ammonia
        • Chlorine dioxide
        • Ozone
    • Inorganic fumes
      • Metal and metal oxide fumes
        • Metal oxide fumes
        • Aluminium fumes
        • Calcium oxide fumes
        • Titanium dioxide fumes
        • Chromium fumes
        • Manganese fumes
        • Iron fumes
        • Nickel fumes
        • Copper fumes
        • Zinc fumes
        • Silver fumes
        • Cadmium fumes
        • Tin fumes
        • Lead fumes
      • Welding fumes
        • Gas welding fumes
        • Arc welding fumes
        • Soldering fumes
    • Inorganic liquids and vapours
      • Inorganic acid solutions
        • Inorganic acid solutions
        • Phosphoric acid
        • Sulphuric acid
        • Nitric acid
      • Caustic alkali solutions
        • Caustic alkali solutions
      • Other inorganic liquids
        • Plating solutions
        • Hydrogen peroxide
    • Metallic compounds
      • Chromium (VI)
      • Beryllium
      • Magnesium
      • Aluminium
      • Titanium
      • Vadium
      • Chromium
      • Manganese
      • Iron
      • Cobalt
      • Nickel
      • Copper
      • Zinc
      • Arsenic
      • Selenium
      • Silver
      • Cadmium
      • Tin
      • Antimony
      • Tungsten compounds
      • Mercury
      • Lead
    • Other inorganic substances
      • Cyanides
      • Fluorides
      • Hypochlorites
      • Nitrates
  • Organic substances
    • Organic dusts
      • Animal-derived dusts
        • Fur dust
        • Hair dust
        • Leather dust
      • Wood dust
        • Wood dust
        • Cork dust
      • Rubber dust
        • Rubber dust
        • Natural rubber
        • Styrene-butadiene rubber
        • Polychloroprene
      • Flour, grain and related dusts
        • Grain dust
        • Flour dust
        • Starch dust
      • Plastic dusts
        • Plastic dusts
        • Cellulose acetate
        • Cellulose nitrate
        • Polyethylene
        • Polypropylene
        • Polystyrene
        • Poly(vinyl chloride)
        • Poly(vinyl acetate)
        • Polyamides
        • Polyacrylates
        • Epoxies
        • Phenol-formaldehyde
        • Urea-formaldehyde
        • Melamine-formaldehyde
        • Polyurethanes
        • Polyesters
      • Fabric and textile fibre dusts
        • Natural fabric and textile fibre dusts
          • Cotton dust
          • Wool fibres
          • Silk fibres
          • Flax fibres
          • Felt dust
        • Synthetic fibres
          • Synthetic fibres
          • Rayon fibres
          • Acrylic fibres
          • Polyester fibres
          • Nylon fibres
          • Acetate fibres
        • Treated textile fibres
          • Treated textile fibres
      • Other organic dusts
        • Organic dyes and pigments
        • Sugar dust
        • Tobacco dust
        • Tannic acid
        • Cellulose
    • Organic gases
      • Alkanes (C1-C4)
        • Alkanes (C1-C4)
        • Natural gas
        • Methane
        • Propane
      • Aliphatic aldehydes
        • Aliphatic aldehydes
        • Formaldehyde
      • Unsaturated aliphatic hydrocarbons
        • Unsaturated aliphatic hydrocarbons
        • Acetylene
      • Other organic gases
        • Hydrogen cyanide
        • Vinyl chloride
        • Ethylene oxide
        • Phosgene
        • Aesthetic gases
        • Propellant gases
    • Organic liquids and vapours
      • Volatile Organic Liquids
        • Acetic acid
        • Formic acid
        • Carbon disulphide
        • Methyl methacrylate
        • Turpentine
      • Aromatic alcohols
        • Aromatic alcohols
        • Phenol
      • Halogeted aromatic hydrocarbons
        • Polychlorited biphenyls or PCBs
      • Petroleum cuts
        • Leaded gasoline
        • Kerosene
        • Diesel oil
        • Heating oil
        • Asphalt
        • Other mineral oils
        • Aviation gasoline
        • Alkanes (C18+)
        • Alkanes (C5-C17)
      • Organic solvents
        • Organic solvents
        • Aliphatic alcohols
          • Aliphatic alcohols
          • Methanol
          • Ethanol
          • Isopropanol
        • Chlorited alkanes
          • Chlorited alkanes
          • Carbon tetrachloride
          • Chloroform
          • Methylene chloride
          • 1,1,1-Trichlorethane
        • Chlorited alkenes
          • Chlorited alkenes
          • Trichloroethylene
          • Perchloroethylene
        • Aliphatic esters
          • Aliphatic esters
        • Aliphatic ketones
          • Aliphatic ketones
          • Acetone
        • Glycol ethers
          • Glycol ethers
        • Mononuclear aromatic hydrocarbons
          • Mononuclear aromatic hydrocarbons
          • Benzene
          • Toluene
          • Xylene
          • Styrene
        • Ethers
          • Diethyl ether
          • Ethylene glycol
        • Aliphatic hydrocarbons
          • Mineral spirits post 1970
          • Mineral spirits pre 1970
      • Cutting fluids
        • Cutting fluids pre-1955 (straight, mineral-based)
        • Cutting fluids post-1955 (straight, mineral-based)
      • Complex organic fluids
        • Animal, vegetable glues
        • Linseed oil
        • Synthetic adhesives
        • Waxes, polishes
        • Crude petroleum
        • Lubricating oils and greases (mineral-based)
        • Coal tar and pitch
        • Hydraulic fluid
      • Fluorocarbons
        • Fluorocarbons
      • Polycyclic aromatic hydrocarbons
        • PAHs from any source
        • PAHs from other sources
        • PAHs from wood
        • PAHs from petroleum
        • PAHs from coal
        • Benzo[a]pyrene
    • Other organic products
      • Alkyds
      • Nitroglycerine
      • RDX
      • Trinitrotoluene
      • Aromatic amines
      • Phthalates
      • Isocyates
  • Inorganic and organic mixtures
    • Dusts containing inorganic and organic compounds
      • Soot from any source
        • Soot from any source
      • Carbon dust
        • Coal dust
        • Carbon black
        • Coke dust
        • Graphite dust
    • Mixtures of inorganic and organic gases
      • Coal gas
    • Inorganic and organic combustion fumes
      • Exhaust gas
        • Engine emissions
        • Diesel engine emissions
        • Liquid fuel combustion products
        • Propane engine emissions
      • Pyrolysis fumes
        • Other pyrolysis fumes
        • Plastics pyrolysis fumes
        • Rubber pyrolysis fumes
      • Other combustion fumes
        • Cooking fumes
        • Coal combustion products
        • Wood combustion products
        • Natural gas combustion products
        • Propane combustion products
        • Coke combustion products
    • Liquid mixtures of inorganic and organic substances
      • Paints, varnishes and inks
        • Other paints, varnishes
        • Wood varnishes, stains
        • Inks
        • Metal coatings
  • General categories
    • Pesticides
      • Pesticides
      • Insecticides
        • DDT
      • Wood preservatives
        • Creosote
    • Cleaning agents
      • Cleaning agents
    • Fertilizers
      • Fertilizers
    • Biocides
      • Biocides
    • Bleaches
      • Bleaches
  • Radiation, electric and magnetic fields
    • Ionizing radiation
    • Radio frequency, microwaves
    • Ultraviolet radiation

This Website presents a summary of the CANJEM occupational exposure information system.

CANJEM is a job exposure matrix, i.e. for a given occupation and time period, it provides information on the probability, frequency and intensity of exposure from a list of 258 occupational risk factors.

CANJEM was built from past individual expert evaluations of occupational exposures in a series of four case control studies of various cancers conducted since the mid-1980s up to 2010 in the greater Montreal area. During these studies over 30 000 jobs from 1920 to 2005 held by close to 10 000 subjects were evaluated by experts who assigned exposures based on descriptions of tasks, processes, work environment, and exposure control measures.

CANJEM provides information on work activities using standard classifications of occupation and industry. Versions of CANJEM based on occupation include the following systems: Canadian Classification and Dictionary of Occupations (CCDO 1971), National Occupational Classification (Canada, 2011), International Standard Classification of Occupations (ISCO 1968), and Standard Occupational Classification (USA, 2010). Versions of CANJEM based on industry include the following systems: Standard Industrial Classification (Canada, 1980), North American Industry Classification System (2012), and International Standard Industrial Classification of all Economic Activities (UN, 1968). Searching for specific codes from these classifications can be done on a sister website: www.caps-canada.ca.

The full CANJEM system is being finalized. This Website provides a snapshot of what will be available to potential users. For each of the 258 agents that will be present in CANJEM (click on the agent hierarchy on the left), this Website provides their basic definitions and descriptive statistics, as well as the top 5 occupations and industries regarding probability and intensity of exposure.

Interested users are encouraged to contact our group to develop collaborations.

In the full CANJEM, the following figures show an example of the additional information that will be provided for the occupation Motor vehicle mechanic during the period 1985-2005. Explanations for the CANJEM exposure metrics can be found here. Other sections below provide further information on the development of CANJEM.



The CANJEM system is currently being finalized. This website aims at informing users about the CANJEM project, as well as providing preliminary reports about the 258 agents included in CANJEM.

The list on the left of the screen is a hierarchical classification of the 258 agents according to their physic-chemical properties and uses. At the bottom of the hierarchy, categories in light green are actual CANJEM agents, and clicking on them provides preliminary information available in CANJEM.

The information includes the definition of the agent, the number of jobs in the CANJEM database that were deemed exposed to this agent by the experts as well as descriptive statistics of two simple JEMs including no time period and based either on the 4-digit Canadian Classification and Dictionary of Occupations (CCDO 1971), or on the Canadian Standard Industrial Classification (Canada, 1980).

For each classification, one table presents the top 5 categories with the highest probability of exposure (see definition), and another presents the top 5 categories with highest frequency weighted intensity of exposure (see definition).

The current and final CANJEM database contains 31673 jobs from 8760 subjects, covering the years from 1920 to 2005.

The table below present the top 20 agents in terms of number of jobs exposed.

Agent Code Agent Name Number Exposed Percentage Exposed
530193 PAHs from any source 8240 26.0
370004 Engine emissions 6724 21.0
460003 Organic solvents 6569 21.0
530196 PAHs from petroleum 6458 20.0
210601 Carbon monoxide 5587 18.0
520199 Alkanes (C5-C17) 4961 16.0
518299 Lead 4587 14.0
530199 Mononuclear aromatic hydrocarbons 4319 14.0
520599 Aliphatic aldehydes 4261 13.0
520197 Alkanes (C18+) 3895 12.0
990005 Cleaning agents 3879 12.0
220501 Formaldehyde 3596 11.0
110005 Metallic dust 3514 11.0
512699 Iron 3080 9.7
110001 Abrasives dust 2896 9.1
370006 Diesel engine emissions 2842 9.0
140004 Wood dust 2695 8.5
210703 Nitrogen oxides 2589 8.2
990021 Biocides 2546 8.0
110009 Cristalline silica 2507 7.9

Content


Introduction

Since the mid 80s, our research group has performed several community-based case-control studies of cancer and occupation. Throughout these studies, occupational exposure to close to 300 chemicals was assessed for more than 30 000 individual jobs using an expert-based approach. This approach, based on the evaluation by industrial hygienists of tasks and work environment descriptions collected from interviews, has been regarded as the best, albeit most costly, exposure assessment method for this type of study. The exposure assessments performed during the course of our studies have contributed to a considerable extent to the current body of knowledge on the relationships between occupational exposures and cancer. We intend to further exploit our data by translating the extensive exposure database accumulated into a job-exposure matrix, called CANJEM, that is useable outside the scope of our studies, by other epidemiologists or public health specialists in Canada and internationally.

Description of the Study populations that are the basis for CANJEM

The first Montreal cancer case-control study, hereafter referred to as the Multisite study, is a study of male Canadian citizens aged 35-70 years, living in Montreal during 1979-1985. Cancer cases were ascertained from the 18 largest hospitals in the Montreal metropolitan area, while population-based controls were selected from population based electoral lists and a small group through random-digit dialling. Over 20 cancer sites were considered eligible for recruitment.

The second Montreal study, hereafter referred to as the Lung study, was undertaken from 1996 to 2004 and was also a population-based case-control study aiming to elucidate occupational and non-occupational risk factors for cancer. By contrast with the Multisite study, it focused on lung cancer only and included both men and women aged 35-75 years. In this study, there were 1205 cases and 1541 population controls interviewed.

The third Montreal study involved in this project is hereafter referred to as the Brain cancer study. In 2000, the International Agency for Research on Cancer (IARC) undertook to coordinate an international epidemiologic study of the possible relationship between the use of cellular telephones and brain cancer (INTERPHONE study). That study involved 20 centers located in 13 different countries, including Canada. The Canadian branch of that study included three centers: Ottawa, Montreal and Vancouver. The Ottawa and Montreal sections, managed by our group, involved the implementation of our exposure assessment approach. 218 cases, men and women aged 30-59 of glioma, meningioma, acoustic neurinoma or malignant parotid gland tumours, and 414 controls were successfully interviewed.

The fourth study was a hospital-based breast cancer case-control study. Cases were recruited between 1996 and 1997 and were aged between 50 and 75 years. Controls were subjects newly diagnosed of cancer (32 different sites), frequency matched by age and selected in the same hospitals and during the same period than cases. 1,069 women were included in this study.

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Description of the exposure assessment performed by our group

Outline of the expert assessment approach

We present here a succinct outline of the exposure assessment method used in the three studies along with basic descriptive statistics of the data generated. The reader is referred to Siemiatycki [1] or Gérin [2] for additional details, including the list of substances and examples of job-specific questionnaires. For each consenting subject, interview included a semi-structured section eliciting a detailed description of each job held by the subject in his working lifetime. For each job held, a trained interviewer asked the subject about the company, its products, the nature of the worksite, the subject’s main and subsidiary tasks, and any additional information (e.g., equipment maintenance, use of protective equipment, activities of coworkers) that could provide clues about work exposures and their intensity. Occupations and industries were coded, respectively, according to the 1971 Canadian Classification and Dictionary of Occupations and the 1970 and 1980 versions of the Standard Industry Classification. For some occupations, supplementary questionnaires were used to assist interviewers with detailed technical probing. A team of chemists and industrial hygienists examined each completed questionnaire and translated each job into a list of potential exposures using a checklist of ~300 agents. This list was originally devised to include substances prevalent in the workplace and for which scientific and technical literature was available. The agents include specific chemicals (e.g. benzene), chemical groups or functions (e.g. aromatic amines), mixtures of relatively fixed composition (e.g. gasoline) or variable composition (e.g. paints), complex materials (e.g. cement), as well as general categories (e.g. solvents). They are classified into categories according to their usual physical state: dusts, gases, fumes and smoke, and liquids and their vapors. The sources of information available to the hygienists included scientific and technical literature, trade directories, contact with experts and consultants from the industry or the occupational health and safety network, as well as worksite visits.

When taking together all studies, the team of coders spent 50 person-years on the exposure assessment, including helping to develop the methodology, monitoring the quality of the interviewing, conducting background research on exposures in different occupations, coding the individual participants’ files, and recoding after the initial complete round of coding was finished. The final exposure codes attributed to a participant were based on consensus among the coders. Coders were blind with regard to the subject’s disease status. For each substance considered present in each job, the coders noted three dimensions of information, their degree of confidence (‘reliability’) that the exposure had actually occurred (possible, probable, definite), the frequency of exposure in a normal workweek (<5%, 5% to 30%, >30% of the time for the Multisite study, and a percentage value for the Lung, Brain and Breast studies), and the relative level of concentration of the agent (low, medium, high). Concentration levels were established with reference to certain benchmark occupations in which the substance is found. Specifically, we identified some hypothetical workplace situations a priori which would correspond to low, medium and high exposure for each substance, and the experts rated each real job against these benchmarks. As an illustration, examples of settings for crystalline silica would include: low concentration - mining and brickworks; medium concentration - foundries, concrete work and masonry; high concentration - sandblasting and pottery works. The exposure assessment was based not only on the worker’s occupation and industry, but also on individual characteristics of the workplace and tasks as reported by the subject. Non-exposure was interpreted as exposure up to the level that can be found in the general, non-occupational environment.

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Validity of the individual expert assessments

The expert assessment method used in our studies is considered to be the best available method of retrospectively assessing occupational exposures in community-based studies [3,4]. Moreover, the few assessments of reliability and validity [5-7] have been encouraging. Weighted kappa for repeatability has been reported as high as 80% when the raters worked as a panel and around 70% when they worked independently [7]. Intra-rater reliability in the same study was also around 70%. Finally, Fritschi et al. reported a validation study where the Montreal experts assessed exposure to 19 substances for 47 jobs for which some measurements were available [8]. They found that the experts were able to correctly identify between 70% and 90% of the substances known to have been present. This study is the closest to external validation performed to date on the Montreal expert data.

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Example of exposure assessment for a job

The following example is of a job of working on the production line from 1952 to 1953 at an appliance facility.

The occupation coded in CCDO 1971 was ‘electrical appliance set-up man’ (electrical equipment).

The industry, coded in Canadian SIC 1980 was ‘Major appliance industry’

The following are the notes from the interviewer for that job, loosely translated from French :

Big plant (occupied a whole city block) ~ 100 guys on the production line Subject was adding the main control and ‘butter compartment’ Subject used only drill and air powered screwdrivers, no visible dust Did not use oil, grease or any other chemical

Following these descriptions, the experts assigned the following exposures:

Days per week Daily hours at level Reliability Comment
Low Medium High
Plastic Dust 5 8 Low Drilling and others on the line
CFC-113 1 0.5 Low Leak of cooling system
Magnetic fields 5 5 Low Electric or air-driven drill ?
Magnetic fields (pulsed) 5 Medium Electric or air-driven drill ?
Env. Tobacco smoke 8 High

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Development of CANJEM

CANJEM is the synthesis of the expert evaluation of ~30 000 jobs held by subjects of the 4 studies described above. For each job, a decision was made on the presence, frequency and intensity of exposure to ~300 agents. This sums up almost to 10 M decisions.

It was decided the best way to implement this synthesis in order to share this information with others was to create a series of job exposure matrices (JEMs). A JEM can be viewed as a tool linking a particular exposure situation to exposure estimates. The exposure situation can be described by one or several axes. The simplest kind of JEM may have 2 axes: occupation and agent. For each combination of values of the axes describing an exposure situation (e.g. welder and lead fumes), the JEM will provide exposure estimates (e.g. in the crudest form: exposed or not exposed). There can be more than 2 axes for a JEM; for instance exposures are known to change over time, and time period can form an additional JEM axis. A particular combination of values of the JEM dimensions, or axes, is called a JEM cell. Each JEM cell corresponds to a particular exposure situation, and thus has its own exposure estimates. Depending on the type of information, exposure estimates provided by a JEM can take several forms; e.g. from simple exposed/not exposed dichotomy to a quantitative exposure level in concentration unit.

The sections below summarize the dimensions of the CANJEM system, the exposure metrics derived for each cell of the JEM, and the statistical approach used to compute these metrics.

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CANJEM dimensions

The first dimension of CANJEM is ‘risk factor’. The initial list of occupational risk factors in the Multisite study included 294 agents. This list was updated during the following studies. Some agents were added while some were eliminated. CANJEM includes 258 agents that were coded in all studies and which could be pooled across the studies.

The second dimension of CANJEM is ‘activity’, i.e. which tasks were performed by the worker within which industrial environment. CANJEM is available either as occupation based or industry based, i.e. the activity is defined by the worker’s occupation, or by the industry in which it was performed. In order to facilitate linking CANJEM to other systems, occupation in CANJEM is described using 4 different standard classification systems: Canadian Classification and Dictionary of Occupations (CCDO 1971), National Occupational Classification (Canada, 2011), International Standard Classification of Occupations (ISCO 1968), and Standard Occupational Classification (USA, 2010). In a similar manner, industry is described in 3 different standard classification systems: Standard Industrial Classification (Canada, 1980), North American Industry Classification System (2012), and International Standard Industrial Classification of all Economic Activities (UN, 1968). CANJEM versions exist with the ‘activity’ axis being any of these 7 standard classifications.

The third dimension of CANJEM is time. In order to provide flexibility to users, and since splitting the data into separate time periods can impact the number of occupations or industry with sufficient information, CANJEM will be available based on 3 different time period classifications : no time period (1920-2005), 2 time periods (1920-1969 and 1970-2005), and 4 time periods (1920-1949, 1950-1969, 1970-1984 and 1985-2005).

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CANJEM exposure metrics

For each cell, several exposure metrics were calculated:

Probability of exposure was measured as the proportion of jobs coded as being exposed within a cell, i.e. if the exposure occurred for a minimum of 2 h/week at a low exposure level or higher.

Distribution of Exposure intensity across individual exposed jobs; 3 proportions for low, medium and high summing to 100% are provided

Distribution of Exposure assignment reliability across individual exposed jobs; 3 proportions for low, medium and high summing to 100% are provided

Distribution of Exposure frequency across individual exposed jobs; 4 proportions for [0-2h], ]2h-12h], ]12h-39h] and >40h per week, summing to 100%, are provided

To facilitate quantification of exposure in the cells of the JEMs, we created an index that combines the intensity averaged over a 40-hour workweek, referred to as frequency-weighted intensity (FWI; i.e. FWI = exposure intensity*frequency of exposure in hours worked per week/40 hours). To operationalise this computation, we attributed numerical values to the three exposure intensity values from the expert assessment (i.e. low, medium, high). The experts considered that medium and high levels corresponded approximately to relative absolute values of 5 times and 25 times the low level. This varied from agent to agent, but these weights (i.e. 1, 5, 25) were thought to represent the best overall estimate of the ratios for the three intensity categories across agents. Intensity of exposure for a JEM cell was defined as the median FWI across all exposed jobs within a cell.

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Computing of exposure metrics within cells

The metrics described above were computed using Bayesian hierarchical models, using the hierarchy of the occupation/industry classifications, to draw information from similar groups in order to improve estimates for cells with few observations. This framework was also used to provide measures of uncertainty around the estimates reported in the cell, as well as to adjust for potential differences in exposure assessment between the studies from which CANJEM was built upon.

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Availability

CANJEM will be available for free from the Web to allow users to find information on specific occupations, industry or chemicals in the form of summary reports or cell by cell.

Regarding bulk access to the various CANJEM matrices, since it was funded by Canadian institutions, the aim of our group is to provide access to Canadian research teams for minimal fees depending on the amount of work involved for our group. For other research teams, financial participation would depend on each particular situation. Any collected money this money will serve to help maintain and refine CANJEM, and to provide technical and scientific support to users.

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References

  1. Siemiatycki J. Exposure assessment in community-based studies of occupational cancer. Occup Hyg 1996;3:41-58.http://www.csa.com/partners/viewrecord.php?requester=gs&collection=ENV&recid=3913624 (accessed 9 Feb2011).
  2. Gérin M. Recent approaches to retrospective exposure assessment in occupational cancer epidemiology. Recent Results Cancer Res 1985;120:39-49.
  3. Teschke K, Olshan AF, Daniels JL, et al. Occupational exposure assessment in case-control studies: opportunities for improvement. Occup Environ Med 2002;59:575-93; discussion 594.http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1740358&tool=pmcentrez&rendertype=abstract (accessed 29 Jun2011).
  4. McGuire V, Nelson LM, Koepsell TD, et al. Assessment of occupational exposures in community-based case-control studies. Annu Rev Public Health 1998;19:35-53. doi:10.1146/annurev.publhealth.19.1.35
  5. Goldberg MS, Siemiatycki J, Gérin M. Inter-rater agreement in assessing occupational exposure in a case-control study. Br J Ind Med 1986;43:667-76.
  6. Benke G, Sim M, Forbes L, et al. Retrospective assessment of occupational exposure to chemicals in community-based studies: validity and repeatability of industrial hygiene panel ratings. Int J Epidemiol 1997;26:635-42.
  7. Siemiatycki J, Fritschi L, Nadon L, et al. Reliability of an expert rating procedure for retrospective assessment of occupational exposures in community-based case-control studies. Am J Ind Med 1997;31:280-6.http://www.ncbi.nlm.nih.gov/pubmed/9055950
  8. Fritschi L, Nadon L, Benke G, et al. Validation of expert assessment of occupational exposures. Am J Ind Med 2003;43:519-22.

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CANJEM was developed at the University of Montreal Hospital Research Center (CRCHUM) within the Chair of environmental epidemiology led by Dr. Jack Siemiatycki.

The CANJEM project was led by Jérôme Lavoué and Jack Siemiatycki.

Other collaborators included:

France Labrèche

Marie-Élise Parent

Michel Gérin

Mark Goldberg

Marie-Claude Rousseau

Marie-Pierre Sylvestre

Tracy Kirkham

Aude Lacourt

Jean-François Sauvé


Acknowledgments

Lesley Richardson contributed to the design of the studies, and the development and coordination of the data collection methods. Exposure assessment methods were expertly developed and implemented by Michel Gérin, Louise Nadon, Ramzan Lakhani, Denis Bégin, and Benoit Latreille. The studies would not have been possible without the able participation of a large number of research assistants and interviewers, including Marie-Claire Goulet, Jerome Asselin, and Sally Campbell. Dora Rodriguez and Elmira Aliyeva, were responsible for the work on verifying the coding of cross-walks, while Ana Gueorguieva in conjunction with Mendher Merzoug prepared the databases and analyses required in the preparation of the final matrix.

Grant Support

The actual development of the CANJEM was funded by the Société de recherche sur le cancer (SRC) through the GrePEC initiative. The original studies were funded by a number of agencies, including the National Health Research and Development Programme, Health Canada, the National Cancer Institute of Canada, the Medical Research Council of Canada, the Canadian Institutes for Health Research and the National Institutes of Health (NIH). JS was the recipient of a Canada Research Chair and holds the Guzzo-SRC Research Chair in Environment and Cancer. Dr Parent had a salary award from the Fonds de la recherche en santé du Québec.

Definition of the agent

Abrasives dust

Dust generated from abrasives during the manufacturing of abrasives or during abrading, smoothing, or polishing of metals, wood, stones, concrete, jewelry, etc. The abrasive could be of a single composition such as silica, or aggregate material containing alumina or silicon carbide, with binders such as vitrified glass, resins or rubber.


In the current CANJEM database, 1365 jobs are exposed at low concentration, 1220 at medium, and 311 at high, for a total of 9.1 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 176 cells have a non null probability of exposure, with 71 lower than 5% and 105 greater than 5%. The median and range of probability values among cells with >5% probability is 20% [5.1-96].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8310 FOREMEN, METAL MACHINING OCCUPATIONS 25 22 24 21 96 67 25 8.3 5
8373 ABRADING AND POLISHING OCCUPATIONS: CLAY, GLASS, STONE AND RELATED MATERIALS 17 13 16 12 94 19 19 62 40
8311 TOOL-AND-DIE MAKING OCCUPATIONS 58 36 53 35 91 21 66 13 5
8357 WOOD SANDING OCCUPATIONS 13 12 11 10 85 0 36 64 40
8313 MACHINIST AND MACHINE-TOOL SETTINGUP OCCUPATIONS 250 150 200 130 82 26 59 15 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8357 WOOD SANDING OCCUPATIONS 13 12 11 10 85 0 36 64 25 40
8371 CUTTING AND SHAPING OCCUPATIONS:CLAY, GLASS, STONE AND RELATED MATERIAL 19 16 10 8 53 10 30 60 25 40
8373 ABRADING AND POLISHING OCCUPATIONS: CLAY, GLASS, STONE AND RELATED MATERIALS 17 13 16 12 94 19 19 62 25 40
8786 INSULATING OCCUPATIONS, CONSTRUCTION 23 21 1 1 4.3 0 0 100 25 40
8353 WOOD SAWING AND RELATED OCCUPATIONS EXCEPT SAWMILL 15 14 2 2 13 0 50 50 15 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 305 cells have a non null probability of exposure, with 100 lower than 5% and 205 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-87].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6352 Paint and Body Repair Shops 52 35 45 31 87 18 47 36 5
8668 Offices of Denturists 18 13 15 10 83 20 80 0 5
4275 Painting and Decorating Work 150 110 120 89 78 25 71 3.5 5
4271 Plastering and Stucco Work 36 27 27 21 75 37 15 48 5
4277 Hardwood Flooring Installation 20 16 15 14 75 6.7 80 13 10

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3599 Other Non-Metallic Mineral Products Industries n.e.c. 13 11 5 4 38 0 0 100 25 40
3932 Toys and Games Industry 28 26 5 4 18 20 20 60 25 40
4234 Insulation Work 24 19 1 1 4.2 0 0 100 25 40
4276 Terrazzo and Tile Work 10 10 6 6 60 0 17 83 25 40
611 Shoe Stores 33 28 1 1 3 0 0 100 25 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Cristalline silica

The crystalline forms of free silica are quartz, cristobalite and tridymite. Many sands, clays and rocks are largely composed of small silica crystals; exposure to silica occurred mainly because of sand used in construction, in sand blasting, in foundry molds, clay, glass and stone processing, pottery and brick making. Exposure also occurred to workers involved in mining, quarrying, and rock and soil drilling.


In the current CANJEM database, 1646 jobs are exposed at low concentration, 705 at medium, and 156 at high, for a total of 7.9 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 182 cells have a non null probability of exposure, with 74 lower than 5% and 108 greater than 5%. The median and range of probability values among cells with >5% probability is 18% [5-100].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
7715 BLASTING OCCUPATIONS 10 6 10 6 100 30 70 0 35
8153 SEPARATING, CRUSHING, GRINDING AND MIXING OCCUPATIONS: CLAY, GLASS AND STONE 11 11 11 11 100 9.1 55 36 40
7719 OTHER MINING AND QUARRYING INCLUDING OIL AND GAS FIELD OCCUPATIONS 59 50 58 49 98 31 59 10 40
8783 CONCRETE FINISHING AND RELATED OCCUPATIONS 46 41 45 40 98 38 58 4.4 28
7713 ROCK AND SOIL DRILLING OCCUPATIONS 53 45 49 41 92 33 41 27 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 34 27 85 2.9 29 68 25 40
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 2 2 18 0 50 50 15 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 12 10 67 42 8.3 50 15 40
9139 RAILWAY TRANSPORT OPERATING OCCUPATIONS, N.E.C. 15 14 2 2 13 50 0 50 13 21
9317 PACKAGING OCCUPATIONS, N.E.C. 140 130 4 4 3 50 0 50 13 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 248 cells have a non null probability of exposure, with 82 lower than 5% and 166 greater than 5%. The median and range of probability values among cells with >5% probability is 14% [5-94].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
631 Automobile Dealers 49 46 46 43 94 65 35 0 40
814 Foreign Affairs and International Assistance 16 13 15 12 94 47 40 13 35
4231 Masonry Work 60 49 55 46 92 40 60 0 6
3542 Structural Concrete Products Industry 11 8 10 7 91 40 50 10 35
4276 Terrazzo and Tile Work 10 10 9 9 90 0 78 22 7.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2941 Iron Foundries 50 45 28 27 56 14 25 61 25 40
2951 Primary Production of Aluminum Industry 19 16 3 3 16 33 0 67 25 40
2961 Aluminum Rolling, Casting and Extruding Industry 26 25 4 4 15 25 0 75 25 40
3194 Turbine and Mechanical Power Transmission Equipment Industry 26 19 5 4 19 20 0 80 25 40
3041 Custom Coating of Metal Products Industry 33 23 4 3 12 25 0 75 15 25

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Alumina

Oxide of aluminium, Al2O3 and its various polymorphs and hydrated species. Corundum (both natural and synthetic), the crystalline form of alumina, has been widely used as an abrasive while the trihydrate is used as an extender pigment in paints, plastics, cosmetics, etc.


In the current CANJEM database, 1308 jobs are exposed at low concentration, 315 at medium, and 24 at high, for a total of 5.2 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 134 cells have a non null probability of exposure, with 54 lower than 5% and 80 greater than 5%. The median and range of probability values among cells with >5% probability is 17% [5.3-72].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8311 TOOL-AND-DIE MAKING OCCUPATIONS 58 36 42 28 72 71 29 0 5
8373 ABRADING AND POLISHING OCCUPATIONS: CLAY, GLASS, STONE AND RELATED MATERIALS 17 13 12 10 71 8.3 75 17 40
8313 MACHINIST AND MACHINE-TOOL SETTINGUP OCCUPATIONS 250 150 170 120 67 70 30 0 5
8310 FOREMEN, METAL MACHINING OCCUPATIONS 25 22 16 13 64 81 19 0 5
8393 FILING, GRINDING, BUFFING, CLEANING AND POLISHING OCCUPATIONS, N.E.C. 100 83 61 44 59 39 57 3.3 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8783 CONCRETE FINISHING AND RELATED OCCUPATIONS 46 41 4 4 8.7 0 25 75 15 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 3 3 17 33 33 33 5 40
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 3 3 7.5 0 100 0 5 40
8149 METAL PROCESSING AND RELATED OCCUPATIONS, N.E.C. 15 13 1 1 6.7 0 100 0 5 40
8373 ABRADING AND POLISHING OCCUPATIONS: CLAY, GLASS, STONE AND RELATED MATERIALS 17 13 12 10 71 8.3 75 17 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 223 cells have a non null probability of exposure, with 85 lower than 5% and 138 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-83].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8668 Offices of Denturists 18 13 15 10 83 93 6.7 0 5
6352 Paint and Body Repair Shops 52 35 42 30 81 86 14 0 5
4277 Hardwood Flooring Installation 20 16 15 14 75 73 27 0 10
4275 Painting and Decorating Work 150 110 79 64 54 99 1.3 0 5
4271 Plastering and Stucco Work 36 27 19 15 53 89 11 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3592 Asbestos Products Industry 53 44 1 1 1.9 0 0 100 25 40
3599 Other Non-Metallic Mineral Products Industries n.e.c. 13 11 3 2 23 0 0 100 25 40
4276 Terrazzo and Tile Work 10 10 4 4 40 0 25 75 14 22
2951 Primary Production of Aluminum Industry 19 16 6 5 32 0 83 17 5.3 40
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 14 12 16 29 29 43 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Silicon carbide

A bluish-black, crystalline, artificial mineral characterized by extreme hardness, a high melting point and chemical inertness. It has been used mainly as an abrasive in the form of granules or powder for shaping, cleaning or polishing surfaces. Other applications include refractories and wear-resistant surfaces.


In the current CANJEM database, 623 jobs are exposed at low concentration, 187 at medium, and 6 at high, for a total of 2.6 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 98 cells have a non null probability of exposure, with 44 lower than 5% and 54 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-57].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8311 TOOL-AND-DIE MAKING OCCUPATIONS 58 36 33 22 57 76 24 0 5
8313 MACHINIST AND MACHINE-TOOL SETTINGUP OCCUPATIONS 250 150 130 90 53 70 29 0.75 5
8310 FOREMEN, METAL MACHINING OCCUPATIONS 25 22 13 10 52 85 15 0 5
8393 FILING, GRINDING, BUFFING, CLEANING AND POLISHING OCCUPATIONS, N.E.C. 100 83 41 32 40 44 54 2.4 5
8333 SHEET-METAL WORKERS 88 65 27 18 31 85 15 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8373 ABRADING AND POLISHING OCCUPATIONS: CLAY, GLASS, STONE AND RELATED MATERIALS 17 13 3 3 18 0 100 0 5 40
8371 CUTTING AND SHAPING OCCUPATIONS:CLAY, GLASS, STONE AND RELATED MATERIAL 19 16 4 3 21 0 75 25 4.1 22
8783 CONCRETE FINISHING AND RELATED OCCUPATIONS 46 41 1 1 2.2 0 0 100 3.1 5
8548 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: FABRICATING, ASSEMBLING AND REPAIRING, WOOD PRODUCTS 16 16 2 2 12 100 0 0 1.1 45
4131 BOOKKEEPERS AND ACCOUNTING CLERKS 620 400 1 1 0.16 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 161 cells have a non null probability of exposure, with 71 lower than 5% and 90 greater than 5%. The median and range of probability values among cells with >5% probability is 10% [5-50].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4277 Hardwood Flooring Installation 20 16 10 9 50 100 0 0 10
3062 Metal Dies, Moulds and Patterns Industry 12 12 5 5 42 80 20 0 5
3069 Other Hardware and Cutlery Industries 17 14 6 3 35 100 0 0 15
6352 Paint and Body Repair Shops 52 35 17 11 33 82 18 0 10
3023 Pre-Engineered Metal Buildings Industry (Except Portable) 36 32 11 8 31 91 9.1 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
811 Defence Services 12 9 2 1 17 0 100 0 5 40
3599 Other Non-Metallic Mineral Products Industries n.e.c. 13 11 1 1 7.7 0 0 100 3.1 5
4911 Electric Power Systems Industry 180 130 1 1 0.56 0 100 0 3 40
4276 Terrazzo and Tile Work 10 10 2 2 20 0 50 50 1.9 5
2911 Ferro-alloys Industry 11 10 1 1 9.1 0 100 0 1.5 12

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Inorganic insulation dust

Dust arising from the placement or removal of any inorganic heat insulating materials including asbestos (chrysotile or amphibole), mineral wool, glass fibers and vermiculite/perlite.


In the current CANJEM database, 672 jobs are exposed at low concentration, 564 at medium, and 21 at high, for a total of 4 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 117 cells have a non null probability of exposure, with 65 lower than 5% and 52 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5-92].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9533 STATIONARY ENGINE AND AUXILIARY EQUIPMENT OPERATING AND MAINTAINING OCCUPATIONS 100 63 95 58 92 81 19 0 5
8786 INSULATING OCCUPATIONS, CONSTRUCTION 23 21 20 19 87 0 50 50 28
6111 FIRE-FIGHTING OCCUPATIONS 63 57 50 48 79 100 0 0 5
8791 PIPEFITTING, PLUMBING AND RELATED OCCUPATIONS, N.E.C. 200 130 140 97 70 42 58 0 5
9157 ENGINE AND BOILER ROOM CREW, SHIP 41 35 28 24 68 32 68 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8786 INSULATING OCCUPATIONS, CONSTRUCTION 23 21 20 19 87 0 50 50 3.4 28
8531 ELECTRICAL EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 37 36 10 10 27 20 80 0 3.2 28
4131 BOOKKEEPERS AND ACCOUNTING CLERKS 620 400 1 1 0.16 100 0 0 1.2 48
4155 STOCK CLERKS AND RELATED OCCUPATIONS 270 230 1 1 0.37 100 0 0 1.2 38
8141 METAL EXTRUDING AND DRAWING OCCUPATIONS 16 15 1 1 6.2 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 193 cells have a non null probability of exposure, with 109 lower than 5% and 84 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-86].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8324 Firefighting Services 43 39 37 35 86 100 0 0 5
4211 Wrecking and Demolition 31 26 21 20 68 19 81 0 8
4241 Plumbing 130 92 82 60 64 50 50 0 5
4261 Electrical Work 140 100 86 66 61 53 47 0 2.8
4235 Roof Shingling 40 30 24 18 60 54 46 0 3.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3592 Asbestos Products Industry 53 44 6 6 11 0 67 33 3.4 28
1811 Man-Made Fibre and Filament Yarn Industry 44 36 1 1 2.3 0 0 100 3.1 5
5639 Other Building Materials, Wholesale 28 23 2 2 7.1 50 50 0 2.6 22
4234 Insulation Work 24 19 14 13 58 21 43 36 2.2 26
3321 Major Appliance Industry (Electric and Non-Electric) 77 62 6 6 7.8 17 83 0 2 16

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Chrysotile asbestos

Naturally occuring fibrous hydrated silicates. Asbestos fibers can be divided on the basis of mineralogical features into two groups: serpentines and amphiboles. Chrysotile fibres are curly serpentine fibers made up of tiny individual fibrils which take the shape of a spirally wound tube. Chrysotile asbestos is the type most used for textiles, friction materials (e.g. brake and clutch linings) and floor tiles.


In the current CANJEM database, 1329 jobs are exposed at low concentration, 606 at medium, and 58 at high, for a total of 6.3 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 171 cells have a non null probability of exposure, with 73 lower than 5% and 98 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5.1-93].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9533 STATIONARY ENGINE AND AUXILIARY EQUIPMENT OPERATING AND MAINTAINING OCCUPATIONS 100 63 96 58 93 79 21 0 6
9157 ENGINE AND BOILER ROOM CREW, SHIP 41 35 36 31 88 33 67 0 6
6111 FIRE-FIGHTING OCCUPATIONS 63 57 51 49 81 100 0 0 6
9153 ENGINEER OFFICERS, SHIP 14 11 11 8 79 91 9.1 0 6
8786 INSULATING OCCUPATIONS, CONSTRUCTION 23 21 18 17 78 0 44 56 27

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
7715 BLASTING OCCUPATIONS 10 6 1 1 10 0 0 100 17 27
8158 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CLAY, GLASS AND STONE PROCESSING AND FORMING 25 25 7 7 28 14 29 57 17 40
8263 TEXTILE SPINNING AND TWISTING OCCUPATIONS 12 10 1 1 8.3 0 0 100 17 27
8153 SEPARATING, CRUSHING, GRINDING AND MIXING OCCUPATIONS: CLAY, GLASS AND STONE 11 11 2 2 18 50 0 50 9.1 29
9317 PACKAGING OCCUPATIONS, N.E.C. 140 130 2 2 1.5 50 0 50 8.6 17

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 260 cells have a non null probability of exposure, with 94 lower than 5% and 166 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-85].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
621 Household Furniture Stores 13 12 11 10 85 0 45 55 27
8324 Firefighting Services 43 39 36 34 84 100 0 0 6
3592 Asbestos Products Industry 53 44 41 34 77 15 39 46 27
4271 Plastering and Stucco Work 36 27 27 22 75 89 11 0 6
4211 Wrecking and Demolition 31 26 21 20 68 29 71 0 6

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
4921 Gas Distribution Systems Industry 41 30 3 1 7.3 33 0 67 25 40
621 Household Furniture Stores 13 12 11 10 85 0 45 55 5.6 27
3542 Structural Concrete Products Industry 11 8 4 2 36 0 75 25 3.9 44
1811 Man-Made Fibre and Filament Yarn Industry 44 36 1 1 2.3 0 0 100 3.8 6
3511 Clay Products Industry (From Domestic Clay) 17 15 1 1 5.9 0 0 100 3.8 6

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Amphibole asbestos

Naturally occuring fibrous hydrated silicates. Asbestos fibers can be divided on the basis of mineralogical features into two groups: serpentines and amphiboles. The amphibole fibers are straight and needle-like silicate structures generally more brittle than chrysotile asbestos fibers.


In the current CANJEM database, 526 jobs are exposed at low concentration, 245 at medium, and 22 at high, for a total of 2.5 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 100 cells have a non null probability of exposure, with 44 lower than 5% and 56 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-91].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9533 STATIONARY ENGINE AND AUXILIARY EQUIPMENT OPERATING AND MAINTAINING OCCUPATIONS 100 63 94 57 91 85 15 0 6
9153 ENGINEER OFFICERS, SHIP 14 11 11 8 79 91 9.1 0 6
9157 ENGINE AND BOILER ROOM CREW, SHIP 41 35 31 27 76 23 77 0 6
6111 FIRE-FIGHTING OCCUPATIONS 63 57 47 45 75 100 0 0 0.8
8786 INSULATING OCCUPATIONS, CONSTRUCTION 23 21 15 15 65 6.7 40 53 30

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8599 OTHER PRODUCT FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, N.E.C. 120 110 1 1 0.83 0 0 100 25 40
8156 INSPECTING, TESTING AND GRADING OCCUPATIONS: CLAY, GLASS AND STONE PROCESSING AND FORMING 15 13 2 1 13 0 50 50 6.2 30
8158 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CLAY, GLASS AND STONE PROCESSING AND FORMING 25 25 7 7 28 14 57 29 5 40
8173 COATING AND CALENDERING OCCUPATIONS, CHEMICAL AND RELATED MATERIALS 13 12 1 1 7.7 0 100 0 5 40
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 3 3 13 33 67 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 169 cells have a non null probability of exposure, with 93 lower than 5% and 76 greater than 5%. The median and range of probability values among cells with >5% probability is 8.8% [5-79].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8324 Firefighting Services 43 39 34 32 79 100 0 0 0.8
3592 Asbestos Products Industry 53 44 30 25 57 17 53 30 40
4211 Wrecking and Demolition 31 26 16 15 52 31 69 0 4
4234 Insulation Work 24 19 10 10 42 20 50 30 15
3542 Structural Concrete Products Industry 11 8 4 2 36 0 75 25 44

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3321 Major Appliance Industry (Electric and Non-Electric) 77 62 1 1 1.3 0 100 0 5 40
3592 Asbestos Products Industry 53 44 30 25 57 17 53 30 5 40
3542 Structural Concrete Products Industry 11 8 4 2 36 0 75 25 3.9 44
1811 Man-Made Fibre and Filament Yarn Industry 44 36 1 1 2.3 0 0 100 3.8 6
3521 Hydraulic Cement Industry 43 38 1 1 2.3 0 100 0 3 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Glass fibres

Manufactured from the raw ingredients of glass but with processes designed to create fibrous material. These filament fibers have been used mainly as insulators, as plastic reinforcing materials and in special textiles.


In the current CANJEM database, 322 jobs are exposed at low concentration, 256 at medium, and 8 at high, for a total of 1.9 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 80 cells have a non null probability of exposure, with 50 lower than 5% and 30 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-60].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6111 FIRE-FIGHTING OCCUPATIONS 63 57 38 37 60 100 0 0 1
8786 INSULATING OCCUPATIONS, CONSTRUCTION 23 21 12 10 52 8.3 50 42 20
8733 CONSTRUCTION ELECTRICIANS AND REPAIR WORKERS 140 100 52 42 38 44 56 0 1
8787 ROOFING, WATERPROOFING AND RELATED OCCUPATIONS 43 36 15 13 35 53 47 0 2
8533 ELECTRICAL AND RELATED EQUIPMENT, INSTALLING AND REPAIRING OCCUPATIONS, N.E.C. 130 100 34 29 25 74 26 0 4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2165 ARCHITECTURAL AND ENGINEERING TECHNOLOGISTS AND TECHNICIANS 110 71 1 1 0.93 0 100 0 7.5 60
8579 FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS, N.E.C. 26 16 3 3 12 33 67 0 2.5 20
8786 INSULATING OCCUPATIONS, CONSTRUCTION 23 21 12 10 52 8.3 50 42 2.5 20
8531 ELECTRICAL EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 37 36 2 2 5.4 0 100 0 2.1 23
8515 AIRCRAFT FABRICATING AND ASSEMBLING OCCUPATIONS, N.E.C. 75 66 1 1 1.3 0 100 0 2 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 102 cells have a non null probability of exposure, with 60 lower than 5% and 42 greater than 5%. The median and range of probability values among cells with >5% probability is 9.8% [5-67].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6352 Paint and Body Repair Shops 52 35 35 24 67 69 31 0 2.5
8324 Firefighting Services 43 39 26 25 60 100 0 0 1
4234 Insulation Work 24 19 12 9 50 25 58 17 9
4211 Wrecking and Demolition 31 26 12 11 39 33 67 0 2
4261 Electrical Work 140 100 47 37 33 49 51 0 1

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3592 Asbestos Products Industry 53 44 1 1 1.9 0 100 0 2.5 20
7722 Computer Equipment Maintenance and Repair 11 9 1 1 9.1 0 100 0 2.5 20
3931 Sporting Goods Industry 28 27 1 1 3.6 100 0 0 1 40
4234 Insulation Work 24 19 12 9 50 25 58 17 0.88 9
1699 Other Plastic Products Industries n.e.c. 43 41 3 3 7 67 33 0 0.5 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Mineral wool fibers

Mineral wool is a glassy fibrous silicate material made by melting and fiberizing slags (slag wool) or natural rocks (rock wool). Mineral wool has been used since the 1930s, mainly as a thermal and acoustical insulator.


In the current CANJEM database, 370 jobs are exposed at low concentration, 323 at medium, and 1 at high, for a total of 2.2 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 70 cells have a non null probability of exposure, with 38 lower than 5% and 32 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-65].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6111 FIRE-FIGHTING OCCUPATIONS 63 57 41 39 65 100 0 0 1
8733 CONSTRUCTION ELECTRICIANS AND REPAIR WORKERS 140 100 72 59 53 54 46 0 1
8791 PIPEFITTING, PLUMBING AND RELATED OCCUPATIONS, N.E.C. 200 130 85 60 42 54 46 0 2.5
8787 ROOFING, WATERPROOFING AND RELATED OCCUPATIONS 43 36 17 17 40 47 53 0 1
8781 CARPENTERS AND RELATED OCCUPATIONS 360 230 120 98 35 37 63 0 2

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8538 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: FABRICATING, ASSEMBLING, INSTALLING AND REPAIRING ELECTRICAL, ELECTRONIC AND RELATED EQUIPMENT 35 33 2 2 5.7 50 0 50 13 20
8596 INSPECTING, TESTING AND GRADING OCCUPATIONS: PRODUCT FABRICATING, ASSEMBLING AND REPAIRING, N.E.C. 10 10 1 1 10 0 100 0 3 40
8531 ELECTRICAL EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 37 36 2 2 5.4 0 100 0 2.2 18
8592 Marine Craft Fabricating, Assembling and Repairing Occupations 38 35 2 2 5.3 0 100 0 2.2 18
9311 HOISTING OCCUPATIONS, N.E.C. 80 59 1 1 1.2 0 100 0 1.5 12

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 108 cells have a non null probability of exposure, with 67 lower than 5% and 41 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-68].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4211 Wrecking and Demolition 31 26 21 20 68 24 76 0 4.8
8324 Firefighting Services 43 39 29 27 67 100 0 0 1
4261 Electrical Work 140 100 70 55 50 60 40 0 2
4241 Plumbing 130 92 61 44 48 67 33 0 2
4013 Residential Renovation 90 74 42 36 47 60 40 0 2

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2721 Asphalt Roofing Industry 28 25 1 1 3.6 0 100 0 3 40
5639 Other Building Materials, Wholesale 28 23 2 2 7.1 50 50 0 2.5 20
3271 Shipbuilding and Repair Industry 180 150 4 4 2.2 0 100 0 2.2 18
3321 Major Appliance Industry (Electric and Non-Electric) 77 62 5 5 6.5 20 60 20 2.2 18
4252 Automatic Sprinkler System Installation 11 7 1 1 9.1 0 100 0 1 4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Metallic dust

Any metal dusts generated, regardless of the specific metals involved or whether they are known or unknown. Most metals will have undergone a certain amount of surface oxidation but exposure to specific metal oxides (e.g., lead oxides; iron oxides) was coded only when the main exposure was to the oxide itself and not to the metal dust.


In the current CANJEM database, 1934 jobs are exposed at low concentration, 1364 at medium, and 216 at high, for a total of 11 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 187 cells have a non null probability of exposure, with 59 lower than 5% and 128 greater than 5%. The median and range of probability values among cells with >5% probability is 23% [5-100].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8135 METAL ROLLING OCCUPATIONS 11 11 11 11 100 73 18 9.1 40
8311 TOOL-AND-DIE MAKING OCCUPATIONS 58 36 57 36 98 19 65 16 40
8313 MACHINIST AND MACHINE-TOOL SETTINGUP OCCUPATIONS 250 150 240 140 96 8.8 74 17 40
8315 MACHINE-TOOL OPERATING OCCUPATIONS 100 82 96 78 96 23 58 19 40
8334 METALWORKING-MACHINE OPERATORS, N.E.C. 81 75 76 70 94 50 43 6.6 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9519 PRINTING AND RELATED OCCUPATIONS, N.E.C. 29 27 1 1 3.4 0 0 100 25 40
8179 CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING OCCUPATIONS, N.E.C. 21 19 2 2 9.5 50 0 50 13 52
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 4 3 3.5 0 50 50 5.7 40
9313 LONGSHORE WORKERS, STEVEDORES AND FREIGHT HANDLERS 110 100 4 4 3.7 0 50 50 5.6 13
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 8 6 73 12 75 12 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 279 cells have a non null probability of exposure, with 73 lower than 5% and 206 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5-93].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3059 Other Wire Products Industries 15 12 14 11 93 64 36 0 40
9942 Welding 19 17 17 15 89 41 59 0 40
6352 Paint and Body Repair Shops 52 35 46 32 88 30 70 0 5
3021 Metal Tanks (Heavy Gauge) Industry 13 9 11 7 85 45 27 27 40
3061 Basic Hardware Industry 13 13 11 11 85 64 27 9.1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3741 Pharmaceutical and Medicine Industry 150 110 4 4 2.6 50 0 50 13 25
3993 Floor Tile, Linoleum and Coated Fabric Industry 35 32 2 2 5.7 50 0 50 13 30
2951 Primary Production of Aluminum Industry 19 16 2 2 11 0 50 50 5.6 25
1083 Sugar and Chocolate Confectionery Industry 67 58 1 1 1.5 0 100 0 5 40
1712 Footwear Industry 240 180 3 3 1.3 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Bronze dust

Dust generated when objects made of bronze are cut, abraded, machined, polished, etc. The term bronze is generally applied to any copper alloy where tin is the other major alloying element, although small amounts of other elements are added to modify the characteristics of the bronzes. The product obtained by adding tin to copper is more fusible than copper and thus better suited for casting.


In the current CANJEM database, 46 jobs are exposed at low concentration, 85 at medium, and 12 at high, for a total of 0.45 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 42 cells have a non null probability of exposure, with 28 lower than 5% and 14 greater than 5%. The median and range of probability values among cells with >5% probability is 7.7% [5-24].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8310 FOREMEN, METAL MACHINING OCCUPATIONS 25 22 6 5 24 67 17 17 1
8313 MACHINIST AND MACHINE-TOOL SETTINGUP OCCUPATIONS 250 150 42 35 17 24 69 7.1 9
8336 INSPECTING AND TESTING OCCUPATIONS, METAL SHAPING AND FORMING, EXCEPT MACHINING 23 22 3 2 13 67 33 0 10
8311 TOOL-AND-DIE MAKING OCCUPATIONS 58 36 6 5 10 33 50 17 9
8319 METAL MACHINING OCCUPATIONS, N.E.C. 21 21 2 2 9.5 0 100 0 9

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9519 PRINTING AND RELATED OCCUPATIONS, N.E.C. 29 27 1 1 3.4 0 0 100 25 40
8591 JEWELLERY AND SILVERWARE FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS 46 37 2 2 4.3 0 50 50 13 24
9315 MATERIAL HANDLING EQUIPMENT OPERATORS, N.E.C. 92 88 1 1 1.1 0 100 0 5.6 45
8393 FILING, GRINDING, BUFFING, CLEANING AND POLISHING OCCUPATIONS, N.E.C. 100 83 2 2 1.9 0 50 50 5.3 24
8141 METAL EXTRUDING AND DRAWING OCCUPATIONS 16 15 1 1 6.2 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 63 cells have a non null probability of exposure, with 44 lower than 5% and 19 greater than 5%. The median and range of probability values among cells with >5% probability is 6.7% [5.3-24].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3092 Metal Valve Industry 25 20 6 6 24 17 67 17 9
2971 Copper and Copper Alloy Rolling, Casting and Extruding Industry 45 37 9 8 20 33 44 22 40
3062 Metal Dies, Moulds and Patterns Industry 12 12 2 2 17 0 100 0 5
3059 Other Wire Products Industries 15 12 2 2 13 50 50 0 21
3081 Machine Shop Industry 87 71 11 9 13 9.1 82 9.1 9

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3599 Other Non-Metallic Mineral Products Industries n.e.c. 13 11 1 1 7.7 0 0 100 6.2 10
3352 Electronic Parts and Components Industry 57 41 3 2 5.3 33 0 67 5.6 9
3741 Pharmaceutical and Medicine Industry 150 110 1 1 0.65 0 0 100 5.6 9
2951 Primary Production of Aluminum Industry 19 16 1 1 5.3 0 100 0 5 40
2971 Copper and Copper Alloy Rolling, Casting and Extruding Industry 45 37 9 8 20 33 44 22 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Brass dust

Dust generated when objects made of brass are cut, abraded, machined, polished, etc. Brasses are the most widely used alloys of copper. They are fundamentally binary alloys of copper with zinc but often their properties are modified by addition of other elements in small amounts. Brasses are stronger than copper and are used in structural applications. Uses include bullet jackets, imitation gold jewelry, plumbing hardware, pipes, radiator cases and condenser tubing.


In the current CANJEM database, 76 jobs are exposed at low concentration, 102 at medium, and 18 at high, for a total of 0.62 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 52 cells have a non null probability of exposure, with 34 lower than 5% and 18 greater than 5%. The median and range of probability values among cells with >5% probability is 8% [5-18].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 7 7 18 71 14 14 5
8313 MACHINIST AND MACHINE-TOOL SETTINGUP OCCUPATIONS 250 150 45 38 18 8.9 82 8.9 8
8336 INSPECTING AND TESTING OCCUPATIONS, METAL SHAPING AND FORMING, EXCEPT MACHINING 23 22 4 4 17 75 25 0 40
8310 FOREMEN, METAL MACHINING OCCUPATIONS 25 22 4 4 16 25 50 25 8
8315 MACHINE-TOOL OPERATING OCCUPATIONS 100 82 16 12 16 19 69 12 8

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8319 METAL MACHINING OCCUPATIONS, N.E.C. 21 21 1 1 4.8 0 0 100 25 40
9315 MATERIAL HANDLING EQUIPMENT OPERATORS, N.E.C. 92 88 1 1 1.1 0 100 0 5.6 45
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 1 1 5.6 0 100 0 5 40
8141 METAL EXTRUDING AND DRAWING OCCUPATIONS 16 15 1 1 6.2 0 100 0 5 40
8339 METAL SHAPING AND FORMING OCCUPATIONS, EXCEPT MACHINING, N.E.C. 27 26 1 1 3.7 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 67 cells have a non null probability of exposure, with 41 lower than 5% and 26 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5.3-33].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3091 Metal Plumbing Fixtures and Fittings Industry 30 27 10 8 33 20 70 10 9
3061 Basic Hardware Industry 13 13 4 4 31 50 50 0 40
3062 Metal Dies, Moulds and Patterns Industry 12 12 3 3 25 33 33 33 8
2971 Copper and Copper Alloy Rolling, Casting and Extruding Industry 45 37 10 10 22 40 30 30 40
3041 Custom Coating of Metal Products Industry 33 23 7 5 21 71 29 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3599 Other Non-Metallic Mineral Products Industries n.e.c. 13 11 1 1 7.7 0 0 100 6.2 10
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 1 1 1.2 0 100 0 5 40
2971 Copper and Copper Alloy Rolling, Casting and Extruding Industry 45 37 10 10 22 40 30 30 5 40
3352 Electronic Parts and Components Industry 57 41 3 2 5.3 33 0 67 5 8
3372 Electrical Switchgear and Protective Equipment Industry 49 36 1 1 2 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Stainless steel dust

Dust generated when objects made of this metal are cut, abraded, machined, polished, etc. Stainless steel is available in many different compositions but the most common one, usually known as 18-8 stainless steel, is 18% chromium and 8% nickel. Many other elements such as titanium, molybdenum, niobium, silicon and others are also added in small quantities to customize the steel for special purposes.


In the current CANJEM database, 237 jobs are exposed at low concentration, 288 at medium, and 35 at high, for a total of 1.8 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 86 cells have a non null probability of exposure, with 49 lower than 5% and 37 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5-52].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8310 FOREMEN, METAL MACHINING OCCUPATIONS 25 22 13 10 52 54 38 7.7 6
8333 SHEET-METAL WORKERS 88 65 34 28 39 29 68 2.9 6
8313 MACHINIST AND MACHINE-TOOL SETTINGUP OCCUPATIONS 250 150 93 65 37 19 77 3.2 6
8311 TOOL-AND-DIE MAKING OCCUPATIONS 58 36 21 12 36 29 62 9.5 6
8393 FILING, GRINDING, BUFFING, CLEANING AND POLISHING OCCUPATIONS, N.E.C. 100 83 36 26 35 22 50 28 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8141 METAL EXTRUDING AND DRAWING OCCUPATIONS 16 15 1 1 6.2 0 100 0 5 40
8531 ELECTRICAL EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 37 36 1 1 2.7 0 100 0 5 40
8319 METAL MACHINING OCCUPATIONS, N.E.C. 21 21 2 2 9.5 50 50 0 3 40
8590 FOREMEN: PRODUCT FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, N.E.C. 23 20 1 1 4.3 0 100 0 3 40
8591 JEWELLERY AND SILVERWARE FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS 46 37 8 6 17 38 12 50 2.3 6

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 128 cells have a non null probability of exposure, with 60 lower than 5% and 68 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-47].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3069 Other Hardware and Cutlery Industries 17 14 8 5 47 75 12 12 12
2692 Hotel, Restaurant and Institutional Furniture and Fixture Industry 16 14 7 5 44 86 0 14 20
3021 Metal Tanks (Heavy Gauge) Industry 13 9 5 3 38 60 20 20 6
3062 Metal Dies, Moulds and Patterns Industry 12 12 4 4 33 25 75 0 10
3194 Turbine and Mechanical Power Transmission Equipment Industry 26 19 8 7 31 38 50 12 13

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3932 Toys and Games Industry 28 26 2 1 7.1 0 0 100 25 40
2619 Other Household Furniture Industries 13 12 1 1 7.7 0 100 0 5 40
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 1 1 1.2 0 100 0 5 40
2911 Ferro-alloys Industry 11 10 2 2 18 0 100 0 4.5 36
4911 Electric Power Systems Industry 180 130 2 2 1.1 0 100 0 4 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Mild steel dust

Dust generated when objects made of this metal are cut, abraded, machined, polished, etc. Mild steel is essentially a combination of iron and carbon (less than 2% carbon). All steels contain manganese (usually at least 0.3%) and small amounts of other metals, which provide the strength and hardness that is required by the construction and manufacturing industries.


In the current CANJEM database, 1153 jobs are exposed at low concentration, 894 at medium, and 93 at high, for a total of 6.8 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 145 cells have a non null probability of exposure, with 58 lower than 5% and 87 greater than 5%. The median and range of probability values among cells with >5% probability is 20% [5-80].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8313 MACHINIST AND MACHINE-TOOL SETTINGUP OCCUPATIONS 250 150 200 120 80 13 80 7 40
8331 FORGING OCCUPATIONS 47 39 36 29 77 31 69 0 40
8310 FOREMEN, METAL MACHINING OCCUPATIONS 25 22 19 18 76 53 42 5.3 5
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 21 20 75 14 86 0 40
8311 TOOL-AND-DIE MAKING OCCUPATIONS 58 36 43 30 74 9.3 79 12 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8315 MACHINE-TOOL OPERATING OCCUPATIONS 100 82 69 61 69 25 64 12 5 40
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 21 20 75 14 86 0 5 40
8393 FILING, GRINDING, BUFFING, CLEANING AND POLISHING OCCUPATIONS, N.E.C. 100 83 49 38 48 12 39 49 5 40
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 3 2 2.6 0 67 33 5 40
8311 TOOL-AND-DIE MAKING OCCUPATIONS 58 36 43 30 74 9.3 79 12 3.8 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 236 cells have a non null probability of exposure, with 84 lower than 5% and 152 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-79].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6352 Paint and Body Repair Shops 52 35 41 30 79 29 71 0 5
3023 Pre-Engineered Metal Buildings Industry (Except Portable) 36 32 28 24 78 57 39 3.6 26
3021 Metal Tanks (Heavy Gauge) Industry 13 9 10 6 77 60 20 20 40
3053 Industrial Fastener Industry 20 15 15 11 75 40 53 6.7 40
9942 Welding 19 17 14 12 74 21 79 0 22

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2999 Other Rolled, Cast and Extruded Non-Ferrous Metal Products Industries 19 14 1 1 5.3 0 0 100 25 40
3993 Floor Tile, Linoleum and Coated Fabric Industry 35 32 1 1 2.9 0 0 100 25 40
1083 Sugar and Chocolate Confectionery Industry 67 58 1 1 1.5 0 100 0 5 40
1712 Footwear Industry 240 180 1 1 0.42 0 100 0 5 40
1811 Man-Made Fibre and Filament Yarn Industry 44 36 1 1 2.3 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Inorganic pigments

Insoluble white or colored powders of very fine particle size (0.01 to 1.0 microns) which imparts color and/or other properties (e.g. anti-corrosive properties) to other materials either when mixed intimately with them (dispersion or suspension) or when applied over their surfaces in a thin layer. Inorganic pigments can be subdivided into white (which includes titanium dioxide) , and other colors (iron oxides, lead chromate, etc.) both of which can be of natural or synthetic origin. Organic pigments were coded separately.


In the current CANJEM database, 817 jobs are exposed at low concentration, 209 at medium, and 33 at high, for a total of 3.3 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 160 cells have a non null probability of exposure, with 95 lower than 5% and 65 greater than 5%. The median and range of probability values among cells with >5% probability is 10% [5-72].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8595 PAINTING AND DECORATING OCCUPATIONS, EXCEPT CONSTRUCTION 130 100 94 76 72 62 33 5.3 40
8785 PAINTERS, PAPERHANGERS AND RELATED OCCUPATIONS 180 130 120 82 63 91 8.6 0.86 40
9512 PRINTING PRESS OCCUPATIONS 94 62 59 31 63 83 17 0 40
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 33 26 55 24 27 48 40
9517 BOOKBINDING AND RELATED OCCUPATIONS 46 30 22 16 48 100 0 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2142 CHEMICAL ENGINEERS 30 12 1 1 3.3 0 0 100 25 40
1131 MANAGEMENT OCCUPATIONS: NATURAL SCIENCES, ENGINEERING AND MATHEMATICS 38 26 1 1 2.6 0 100 0 5 40
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 33 26 55 24 27 48 5 40
8179 CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING OCCUPATIONS, N.E.C. 21 19 5 4 24 20 60 20 4.2 40
2111 CHEMISTS 37 22 4 3 11 25 75 0 3 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 206 cells have a non null probability of exposure, with 109 lower than 5% and 97 greater than 5%. The median and range of probability values among cells with >5% probability is 8.9% [5-87].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6352 Paint and Body Repair Shops 52 35 45 30 87 36 60 4.4 5
3511 Clay Products Industry (From Domestic Clay) 17 15 11 9 65 82 9.1 9.1 40
2699 Other Furniture and Fixture Industries n.e.c. 11 9 7 6 64 71 29 0 5
3791 Printing Ink Industry 13 8 8 4 62 88 0 12 40
4275 Painting and Decorating Work 150 110 86 69 59 92 8.1 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2721 Asphalt Roofing Industry 28 25 1 1 3.6 0 0 100 25 40
2711 Pulp Industry 90 77 2 2 2.2 50 0 50 13 22
2941 Iron Foundries 50 45 2 2 4 50 0 50 13 22
2619 Other Household Furniture Industries 13 12 1 1 7.7 0 100 0 5 40
2641 Metal Office Furniture Industry 32 28 1 1 3.1 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Titanium dioxide

This extremely dense, powerful opaque white inorganic pigment has great hiding power. It is absolutely inert and therefore permanent. The best quality is produced from ilmenite. It has been used as a pigment in paints, paper, plastics, floor coverings, inks, rubber, ceramics, roofing granules, textiles and as a fluxing agent in welding electrodes.


In the current CANJEM database, 247 jobs are exposed at low concentration, 55 at medium, and 7 at high, for a total of 0.98 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 60 cells have a non null probability of exposure, with 42 lower than 5% and 18 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5.3-46].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8785 PAINTERS, PAPERHANGERS AND RELATED OCCUPATIONS 180 130 85 60 46 99 1.2 0 16
8595 PAINTING AND DECORATING OCCUPATIONS, EXCEPT CONSTRUCTION 130 100 39 34 30 82 18 0 4
4192 ADJUSTERS, CLAIM 24 19 5 1 21 100 0 0 5
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 12 11 20 25 42 33 16
8570 FOREMEN: FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 10 9 2 2 20 50 50 0 9.2

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9315 MATERIAL HANDLING EQUIPMENT OPERATORS, N.E.C. 92 88 1 1 1.1 0 0 100 10 16
9311 HOISTING OCCUPATIONS, N.E.C. 80 59 1 1 1.2 0 100 0 5.5 44
2142 CHEMICAL ENGINEERS 30 12 2 2 6.7 50 0 50 5 10
9317 PACKAGING OCCUPATIONS, N.E.C. 140 130 2 2 1.5 50 50 0 3.3 42
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 12 11 20 25 42 33 2.2 16

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 78 cells have a non null probability of exposure, with 54 lower than 5% and 24 greater than 5%. The median and range of probability values among cells with >5% probability is 8.8% [5.1-62].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6352 Paint and Body Repair Shops 52 35 32 23 62 62 38 0 4
4275 Painting and Decorating Work 150 110 58 46 39 98 1.7 0 16
3792 Adhesives Industry 22 13 5 3 23 20 80 0 4
3751 Paint and Varnish Industry 99 70 21 17 21 62 24 14 20
4013 Residential Renovation 90 74 17 14 19 100 0 0 3

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2721 Asphalt Roofing Industry 28 25 1 1 3.6 0 0 100 10 16
2641 Metal Office Furniture Industry 32 28 1 1 3.1 0 100 0 2.5 20
1712 Footwear Industry 240 180 2 2 0.84 50 50 0 1.4 23
3231 Motor Vehicle Industry 45 40 4 4 8.9 50 50 0 1.3 12
3771 Toilet Preparations Industry 44 36 2 1 4.5 50 50 0 1.2 18

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Iron oxides

All oxides of iron (e.g., Fe3O4, Fe2O3, FeO.Fe2O3). The most important uses of these compounds have been in pigments for plastics, leather, bricks, textiles, paper and concrete products. Exposure to iron oxides is widespread; this also includes exposure to rust.


In the current CANJEM database, 551 jobs are exposed at low concentration, 371 at medium, and 44 at high, for a total of 3 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 115 cells have a non null probability of exposure, with 55 lower than 5% and 60 greater than 5%. The median and range of probability values among cells with >5% probability is 14% [5.1-45].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8581 MOTOR-VEHICLE MECHANICS AND REPAIRMEN 380 240 170 120 45 53 45 1.8 6
8785 PAINTERS, PAPERHANGERS AND RELATED OCCUPATIONS 180 130 83 56 45 100 0 0 6
8373 ABRADING AND POLISHING OCCUPATIONS: CLAY, GLASS, STONE AND RELATED MATERIALS 17 13 7 6 41 29 71 0 40
8595 PAINTING AND DECORATING OCCUPATIONS, EXCEPT CONSTRUCTION 130 100 52 46 40 54 40 5.8 6
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 7 6 39 14 86 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2142 CHEMICAL ENGINEERS 30 12 1 1 3.3 0 0 100 25 40
9919 OTHER OCCUPATIONS, N.E.C. 66 55 1 1 1.5 0 0 100 25 40
8135 METAL ROLLING OCCUPATIONS 11 11 2 2 18 0 50 50 15 40
9313 LONGSHORE WORKERS, STEVEDORES AND FREIGHT HANDLERS 110 100 2 2 1.9 50 0 50 13 21
2144 ELECTRICAL ENGINEERS 64 31 1 1 1.6 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 159 cells have a non null probability of exposure, with 62 lower than 5% and 97 greater than 5%. The median and range of probability values among cells with >5% probability is 10% [5.3-75].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6352 Paint and Body Repair Shops 52 35 39 27 75 54 41 5.1 6
5919 Other Waste Materials, Wholesale 34 27 22 16 65 27 59 14 40
3511 Clay Products Industry (From Domestic Clay) 17 15 8 7 47 88 0 12 35
6399 Other Motor Vehicle Services n.e.c. 11 6 5 1 45 100 0 0 12
5611 Iron and Steel Primary Forms and Structural Shapes, Wholesale 16 10 7 4 44 57 43 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2721 Asphalt Roofing Industry 28 25 1 1 3.6 0 0 100 25 40
814 Foreign Affairs and International Assistance 16 13 2 2 12 0 50 50 13 24
2911 Ferro-alloys Industry 11 10 3 3 27 0 100 0 5 40
2919 Other Primary Steel Industries 34 24 3 3 8.8 0 100 0 5 40
2921 Steel Pipe and Tube Industry 22 20 3 3 14 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Zinc oxide

A white, water insoluble powder widely used as a pigment and accelerator in paints and rubbers. In paints it resists the action of ultraviolet light and atmospheric sulphur, and prevents growth of mildew and fungus. Other uses include insulating compounds, sunscreen lotions, and paper coatings.


In the current CANJEM database, 107 jobs are exposed at low concentration, 34 at medium, and 10 at high, for a total of 0.48 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 45 cells have a non null probability of exposure, with 29 lower than 5% and 16 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5.4-54].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3113 DENTISTS 13 11 7 7 54 100 0 0 6
8571 BONDING AND CEMENTING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 15 14 5 5 33 100 0 0 40
8173 COATING AND CALENDERING OCCUPATIONS, CHEMICAL AND RELATED MATERIALS 13 12 4 4 31 100 0 0 40
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 16 14 27 6.2 50 44 6
8785 PAINTERS, PAPERHANGERS AND RELATED OCCUPATIONS 180 130 39 28 21 95 5.1 0 6

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8373 ABRADING AND POLISHING OCCUPATIONS: CLAY, GLASS, STONE AND RELATED MATERIALS 17 13 1 1 5.9 0 100 0 5 40
8599 OTHER PRODUCT FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, N.E.C. 120 110 1 1 0.83 0 100 0 5 40
9318 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, MATERIAL HANDLING, N.E.C. 610 530 1 1 0.16 0 100 0 5 40
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 16 14 27 6.2 50 44 3.8 6
8179 CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING OCCUPATIONS, N.E.C. 21 19 1 1 4.8 0 0 100 3.8 6

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 41 cells have a non null probability of exposure, with 27 lower than 5% and 14 greater than 5%. The median and range of probability values among cells with >5% probability is 9.3% [5.4-44].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8668 Offices of Denturists 18 13 8 6 44 12 88 0 1
1599 Other Rubber Products Industries 59 46 21 20 36 76 24 0 40
4275 Painting and Decorating Work 150 110 32 26 22 97 3.1 0 6
3751 Paint and Varnish Industry 99 70 20 17 20 40 20 40 6
1511 Tire and Tube Industry 13 12 2 2 15 100 0 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3799 Other Chemical Products Industries n.e.c. 140 130 1 1 0.71 0 100 0 5 40
3511 Clay Products Industry (From Domestic Clay) 17 15 1 1 5.9 0 0 100 3.8 6
3751 Paint and Varnish Industry 99 70 20 17 20 40 20 40 2 6
3052 Wire and Wire Rope Industry 21 16 1 1 4.8 100 0 0 1.8 70
3592 Asbestos Products Industry 53 44 3 2 5.7 100 0 0 1.5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Lead oxides

All oxides of lead. Red lead (Pb3O4), and litharge (PbO) which is the yellow lead monoxide, have been used extensively as pigments in paints to protect steel substrates against corrosion. Lead oxides have also been used in the manufacture of glass and in fluxing of earthenware. Lead dioxide (PbO2) is the principle active constituent in the positive plate for lead storage batteries.


In the current CANJEM database, 63 jobs are exposed at low concentration, 40 at medium, and 8 at high, for a total of 0.35 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 33 cells have a non null probability of exposure, with 22 lower than 5% and 11 greater than 5%. The median and range of probability values among cells with >5% probability is 9.8% [5.7-23].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9511 TYPESETTING AND COMPOSING OCCUPATIONS 35 24 8 8 23 0 100 0 40
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 10 8 17 10 40 50 7.2
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 3 3 13 33 33 33 8
9510 FOREMEN/WOMEN, PRINTING AND RELATED OCCUPATIONS 15 12 2 2 13 100 0 0 7.2
8595 PAINTING AND DECORATING OCCUPATIONS, EXCEPT CONSTRUCTION 130 100 13 13 10 54 38 7.7 7.2

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8533 ELECTRICAL AND RELATED EQUIPMENT, INSTALLING AND REPAIRING OCCUPATIONS, N.E.C. 130 100 1 1 0.75 0 100 0 5 40
8573 MOULDING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 21 19 1 1 4.8 0 100 0 5 40
9511 TYPESETTING AND COMPOSING OCCUPATIONS 35 24 8 8 23 0 100 0 5 40
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 10 8 17 10 40 50 3.2 7.2
8571 BONDING AND CEMENTING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 15 14 1 1 6.7 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 40 cells have a non null probability of exposure, with 25 lower than 5% and 15 greater than 5%. The median and range of probability values among cells with >5% probability is 6.7% [5.1-18].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3751 Paint and Varnish Industry 99 70 18 14 18 50 17 33 7.2
4543 Marine Towing Industry 21 14 2 2 9.5 50 50 0 7.2
6342 Tire, Battery, Parts and Accessories Stores 23 21 2 2 8.7 0 100 0 4.5
4275 Painting and Decorating Work 150 110 12 10 8.2 92 8.3 0 7.2
1511 Tire and Tube Industry 13 12 1 1 7.7 100 0 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3711 Industrial Inorganic Chemical Industries n.e.c. 58 42 2 2 3.4 0 50 50 15 40
1712 Footwear Industry 240 180 1 1 0.42 0 100 0 5 40
2711 Pulp Industry 90 77 1 1 1.1 0 100 0 5 40
2811 Business Forms Printing Industry 35 28 1 1 2.9 0 100 0 5 40
2821 Platemaking, Typesetting and Bindery Industry 43 31 3 3 7 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Basic lead carbonate

Commonly known as white lead, this compound is a white, amorphous powder made from metallic lead. It is one of the oldest lead pigments for paints; it has also been used in putty and ceramics.


In the current CANJEM database, 54 jobs are exposed at low concentration, 17 at medium, and 11 at high, for a total of 0.26 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 16 cells have a non null probability of exposure, with 13 lower than 5% and 3 greater than 5%. The median and range of probability values among cells with >5% probability is 20% [5.4-25].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8785 PAINTERS, PAPERHANGERS AND RELATED OCCUPATIONS 180 130 46 34 25 87 13 0 9
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 12 10 20 8.3 25 67 8
8595 PAINTING AND DECORATING OCCUPATIONS, EXCEPT CONSTRUCTION 130 100 7 6 5.4 57 29 14 8
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 1 1 4.3 0 100 0 8
2111 CHEMISTS 37 22 1 1 2.7 100 0 0 8

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8529 OTHER FABRICATING AND ASSEMBLING OCCUPATIONS, METAL PRODUCTS, N.E.C. 55 49 1 1 1.8 0 0 100 6.2 10
3313 PRODUCT AND INTERIOR DESIGNERS 61 39 1 1 1.6 0 100 0 5 40
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 12 10 20 8.3 25 67 5 8
9318 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, MATERIAL HANDLING, N.E.C. 610 530 2 2 0.33 0 100 0 5 40
5130 SUPERVISORS: SALES OCCUPATIONS, COMMODITIES 630 540 1 1 0.16 0 100 0 0.5 4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 23 cells have a non null probability of exposure, with 20 lower than 5% and 3 greater than 5%. The median and range of probability values among cells with >5% probability is 18% [8.7-24].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4275 Painting and Decorating Work 150 110 35 29 24 86 14 0 8
3751 Paint and Varnish Industry 99 70 18 15 18 28 28 44 8.5
6342 Tire, Battery, Parts and Accessories Stores 23 21 2 2 8.7 0 100 0 4.5
3332 Electric Lamp and Shade Industry (Except Bulb and Tube) 26 23 1 1 3.8 100 0 0 40
3562 Glass Products Industry (Except Glass Containers) 27 24 1 1 3.7 0 100 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3321 Major Appliance Industry (Electric and Non-Electric) 77 62 1 1 1.3 0 0 100 25 40
3711 Industrial Inorganic Chemical Industries n.e.c. 58 42 1 1 1.7 0 0 100 25 40
3099 Other Metal Fabricating Industries n.e.c. 100 90 1 1 0.97 0 0 100 6.2 10
3562 Glass Products Industry (Except Glass Containers) 27 24 1 1 3.7 0 100 0 5 40
3751 Paint and Varnish Industry 99 70 18 15 18 28 28 44 5 8.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Lead chromate

This category includes not only PbCrO4 itself, commonly known as chrome yellow, but all other other addition compounds containing the lead chromate (e.g., PbO.PbCrO4). These are considered to be the most versatile of the inorganic pigments with a good range of colors. They are relatively inexpensive, and have been used in wood and metal coatings, printing inks, and as coloring agents in rubber and paper.


In the current CANJEM database, 112 jobs are exposed at low concentration, 36 at medium, and 12 at high, for a total of 0.51 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 31 cells have a non null probability of exposure, with 23 lower than 5% and 8 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5.2-25].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 15 13 25 13 33 53 8
8785 PAINTERS, PAPERHANGERS AND RELATED OCCUPATIONS 180 130 43 29 23 100 0 0 8
8595 PAINTING AND DECORATING OCCUPATIONS, EXCEPT CONSTRUCTION 130 100 26 26 20 73 27 0 8
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 3 3 13 33 33 33 8
8570 FOREMEN: FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 10 9 1 1 10 100 0 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8529 OTHER FABRICATING AND ASSEMBLING OCCUPATIONS, METAL PRODUCTS, N.E.C. 55 49 1 1 1.8 0 0 100 6.2 10
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 15 13 25 13 33 53 5 8
8179 CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING OCCUPATIONS, N.E.C. 21 19 1 1 4.8 0 0 100 5 8
8578 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: FABRICATING, ASSEMBLING AND REPAIRING RUBBER, PLASTIC AND RELATED PRODUCTS 26 24 1 1 3.8 0 100 0 1.2 10
8393 FILING, GRINDING, BUFFING, CLEANING AND POLISHING OCCUPATIONS, N.E.C. 100 83 1 1 0.97 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 42 cells have a non null probability of exposure, with 33 lower than 5% and 9 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5.3-54].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6352 Paint and Body Repair Shops 52 35 28 22 54 46 54 0 8
3751 Paint and Varnish Industry 99 70 21 17 21 43 14 43 8
4275 Painting and Decorating Work 150 110 31 26 21 100 0 0 8
3993 Floor Tile, Linoleum and Coated Fabric Industry 35 32 6 6 17 50 33 17 9
3791 Printing Ink Industry 13 8 2 2 15 50 50 0 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3099 Other Metal Fabricating Industries n.e.c. 100 90 1 1 0.97 0 0 100 6.2 10
3511 Clay Products Industry (From Domestic Clay) 17 15 1 1 5.9 0 0 100 5 8
3231 Motor Vehicle Industry 45 40 1 1 2.2 0 100 0 2.5 20
3751 Paint and Varnish Industry 99 70 21 17 21 43 14 43 2 8
3993 Floor Tile, Linoleum and Coated Fabric Industry 35 32 6 6 17 50 33 17 1.1 9

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Extenders

A variety of substances used to modify the physical, thermal, mechanical or electrical properties of the products (paints and metal coatings, adhesives, rubber and plastics) to which they are added or to reduce the overall cost of such products. The chemical composition and function of an extender depend on the industry in which the extender is used. Highest exposure concentrations to extenders occurred during the blending of the raw materials.


In the current CANJEM database, 406 jobs are exposed at low concentration, 142 at medium, and 33 at high, for a total of 1.8 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 88 cells have a non null probability of exposure, with 56 lower than 5% and 32 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-51].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8785 PAINTERS, PAPERHANGERS AND RELATED OCCUPATIONS 180 130 94 64 51 90 9.6 0 40
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 28 22 47 21 29 50 40
8571 BONDING AND CEMENTING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 15 14 7 7 47 43 29 29 40
8173 COATING AND CALENDERING OCCUPATIONS, CHEMICAL AND RELATED MATERIALS 13 12 6 6 46 33 67 0 40
8595 PAINTING AND DECORATING OCCUPATIONS, EXCEPT CONSTRUCTION 130 100 60 51 46 63 35 1.7 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2142 CHEMICAL ENGINEERS 30 12 1 1 3.3 0 0 100 25 40
8357 WOOD SANDING OCCUPATIONS 13 12 1 1 7.7 0 0 100 25 40
8179 CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING OCCUPATIONS, N.E.C. 21 19 2 2 9.5 0 0 100 14 22
8599 OTHER PRODUCT FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, N.E.C. 120 110 2 2 1.7 50 0 50 13 23
1131 MANAGEMENT OCCUPATIONS: NATURAL SCIENCES, ENGINEERING AND MATHEMATICS 38 26 1 1 2.6 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 119 cells have a non null probability of exposure, with 76 lower than 5% and 43 greater than 5%. The median and range of probability values among cells with >5% probability is 8.7% [5-71].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6352 Paint and Body Repair Shops 52 35 37 27 71 32 62 5.4 5
4275 Painting and Decorating Work 150 110 65 50 44 92 7.7 0 40
1599 Other Rubber Products Industries 59 46 24 22 41 54 38 8.3 40
3993 Floor Tile, Linoleum and Coated Fabric Industry 35 32 14 14 40 21 64 14 5
3791 Printing Ink Industry 13 8 5 2 38 80 20 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2619 Other Household Furniture Industries 13 12 1 1 7.7 0 0 100 25 40
3511 Clay Products Industry (From Domestic Clay) 17 15 1 1 5.9 0 0 100 25 40
3731 Plastic and Synthetic Resin Industry 19 16 2 1 11 0 0 100 7.5 20
3029 Other Fabricated Structural Metal Products Industries 100 73 1 1 0.99 0 100 0 5.6 45
1631 Plastic Film and Sheeting Industry 26 20 5 5 19 20 60 20 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Industrial talc

Talcs are hydrated magnesium silicates. Depending on where it is mined, commercially available industrial talc is very often geologically associated with other minerals including carbonates, quartz and varying amounts of asbestos minerals (amphiboles and serpentine) in the form of chains or fibres. Industrial grade talcs are widely used as extenders in paints, plastics, ceramic products and paper coatings and in the rubber industry as extenders and dusting powders.


In the current CANJEM database, 253 jobs are exposed at low concentration, 163 at medium, and 14 at high, for a total of 1.4 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 69 cells have a non null probability of exposure, with 41 lower than 5% and 28 greater than 5%. The median and range of probability values among cells with >5% probability is 13% [5-58].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
7131 FARM MANAGEMENT OCCUPATIONS 62 55 36 34 58 0 100 0 1
9512 PRINTING PRESS OCCUPATIONS 94 62 54 35 57 89 11 0 6
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 29 29 51 90 10 0 6
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 19 15 48 68 32 0 6
8173 COATING AND CALENDERING OCCUPATIONS, CHEMICAL AND RELATED MATERIALS 13 12 4 4 31 25 50 25 23

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8263 TEXTILE SPINNING AND TWISTING OCCUPATIONS 12 10 1 1 8.3 0 0 100 25 40
8357 WOOD SANDING OCCUPATIONS 13 12 1 1 7.7 0 0 100 25 40
8141 METAL EXTRUDING AND DRAWING OCCUPATIONS 16 15 2 2 12 0 50 50 15 40
8571 BONDING AND CEMENTING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 15 14 3 3 20 0 67 33 5 40
8590 FOREMEN: PRODUCT FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, N.E.C. 23 20 2 2 8.7 0 100 0 2.9 23

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 96 cells have a non null probability of exposure, with 60 lower than 5% and 36 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-58].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6352 Paint and Body Repair Shops 52 35 30 21 58 17 83 0 6
1599 Other Rubber Products Industries 59 46 24 23 41 33 58 8.3 35
2941 Iron Foundries 50 45 13 13 26 69 31 0 6
4235 Roof Shingling 40 30 10 10 25 100 0 0 1
4275 Painting and Decorating Work 150 110 36 27 24 100 0 0 6

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3352 Electronic Parts and Components Industry 57 41 1 1 1.8 0 0 100 25 40
1811 Man-Made Fibre and Filament Yarn Industry 44 36 2 2 4.5 50 0 50 13 20
3592 Asbestos Products Industry 53 44 2 2 3.8 50 0 50 13 40
3381 Communications and Energy Wire and Cable Industry 46 29 1 1 2.2 0 100 0 5 40
3561 Primary Glass and Glass Containers Industry 71 55 1 1 1.4 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Clay dust

Most clays are composed mainly of silica and alumina; they form a paste with water and can be hardened when heated. Clays have been used for making pottery, tiles, bricks, pipes and refractory materials and as extender pigments in paints.


In the current CANJEM database, 144 jobs are exposed at low concentration, 91 at medium, and 19 at high, for a total of 0.8 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 54 cells have a non null probability of exposure, with 36 lower than 5% and 18 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-75].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 30 23 75 17 83 0 40
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 21 21 37 38 62 0 40
8785 PAINTERS, PAPERHANGERS AND RELATED OCCUPATIONS 180 130 46 30 25 100 0 0 6
8158 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CLAY, GLASS AND STONE PROCESSING AND FORMING 25 25 5 5 20 40 40 20 40
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 2 2 18 0 100 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9170 SUPERVISORS, MOTOR TRANSPORT OPERATING OCCUPATIONS 25 25 1 1 4 0 0 100 25 40
7717 MINING AND QUARRYING: CUTTING, HANDLING AND LOADING OCCUPATIONS 12 12 1 1 8.3 0 100 0 5 40
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 2 2 18 0 100 0 5 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 1 1 5.6 0 100 0 5 40
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 30 23 75 17 83 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 77 cells have a non null probability of exposure, with 45 lower than 5% and 32 greater than 5%. The median and range of probability values among cells with >5% probability is 8.5% [5-76].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3511 Clay Products Industry (From Domestic Clay) 17 15 13 11 76 46 38 15 40
2941 Iron Foundries 50 45 21 20 42 19 71 9.5 40
2912 Steel Foundries 91 63 16 14 18 38 62 0 40
3751 Paint and Varnish Industry 99 70 18 16 18 61 0 39 7
3792 Adhesives Industry 22 13 4 2 18 25 75 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
4564 Dry Bulk Materials Trucking Industry 34 31 1 1 2.9 0 0 100 25 40
3599 Other Non-Metallic Mineral Products Industries n.e.c. 13 11 1 1 7.7 0 0 100 6.2 10
1631 Plastic Film and Sheeting Industry 26 20 1 1 3.8 0 100 0 5 40
2941 Iron Foundries 50 45 21 20 42 19 71 9.5 5 40
2951 Primary Production of Aluminum Industry 19 16 1 1 5.3 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Mica

A group of silicate minerals with monoclinic crystals which break off easily into thin tough scales. One of the most common is potash mica [H2KAl3(SiO4)3 ]. Micas are well known for their dielectric properties and have been used as electrical and heat insulators and as extenders in plastics, paints, and in roofing shingles.


In the current CANJEM database, 95 jobs are exposed at low concentration, 25 at medium, and 3 at high, for a total of 0.39 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 24 cells have a non null probability of exposure, with 14 lower than 5% and 10 greater than 5%. The median and range of probability values among cells with >5% probability is 7.5% [5.6-67].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8784 PLASTERERS AND RELATED OCCUPATIONS 46 37 31 23 67 90 9.7 0 6
8533 ELECTRICAL AND RELATED EQUIPMENT, INSTALLING AND REPAIRING OCCUPATIONS, N.E.C. 130 100 40 36 30 78 20 2.5 6
8173 COATING AND CALENDERING OCCUPATIONS, CHEMICAL AND RELATED MATERIALS 13 12 3 3 23 33 67 0 30
8530 FOREMEN: FABRICATING, ASSEMBLING, INSTALLING AND REPAIRING OCCUPATIONS, ELECTRICAL, ELECTRONIC AND RELATED EQUIPMENT 35 31 5 5 14 40 60 0 6
8531 ELECTRICAL EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 37 36 3 3 8.1 67 33 0 6

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8141 METAL EXTRUDING AND DRAWING OCCUPATIONS 16 15 1 1 6.2 0 0 100 19 30
8528 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, FABRICATING AND ASSEMBLING METAL PRODUCTS, N.E.C. 40 34 1 1 2.5 100 0 0 1 40
8787 ROOFING, WATERPROOFING AND RELATED OCCUPATIONS 43 36 3 3 7 0 100 0 0.94 7.5
2145 INDUSTRIAL ENGINEERS 49 33 1 1 2 100 0 0 0.75 30
8173 COATING AND CALENDERING OCCUPATIONS, CHEMICAL AND RELATED MATERIALS 13 12 3 3 23 33 67 0 0.75 30

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 53 cells have a non null probability of exposure, with 42 lower than 5% and 11 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [6.2-69].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4271 Plastering and Stucco Work 36 27 25 19 69 88 12 0 6
7722 Computer Equipment Maintenance and Repair 11 9 4 3 36 75 25 0 6
3379 Other Electrical Industrial Equipment Industries 14 9 3 3 21 67 33 0 6
2719 Other Paper Industries 28 20 3 1 11 67 33 0 6
2721 Asphalt Roofing Industry 28 25 3 3 11 33 67 0 30

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3352 Electronic Parts and Components Industry 57 41 1 1 1.8 0 0 100 19 30
3599 Other Non-Metallic Mineral Products Industries n.e.c. 13 11 1 1 7.7 0 0 100 6.2 10
3071 Heating Equipment Industry 28 27 1 1 3.6 100 0 0 1 40
4235 Roof Shingling 40 30 3 3 7.5 0 100 0 0.94 7.5
1599 Other Rubber Products Industries 59 46 1 1 1.7 100 0 0 0.75 30

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Cosmetic talc

Talcs are hydrated magnesium silicates. Only the pure white talcs (impureties can color it gray, green, brown or red) used in cosmetics and toilet preparations are included in this category. Cosmetic talcs are hand sorted, screened, ground very fine and bolted through silk cloth. Consumer talc products marketed before 1973 may have been contaminated to varying degrees by asbestos.


In the current CANJEM database, 404 jobs are exposed at low concentration, 136 at medium, and 0 at high, for a total of 1.7 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 37 cells have a non null probability of exposure, with 19 lower than 5% and 18 greater than 5%. The median and range of probability values among cells with >5% probability is 14% [5-70].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3135 NURSING ATTENDANTS 260 190 180 140 70 79 21 0 2.5
3131 NURSES, GRADUATE, EXCEPT 210 89 140 76 68 84 16 0 2.5
6143 BARBERS, HAIRDRESSERS AND RELATED OCCUPATIONS 110 77 69 48 63 23 77 0 3.5
3113 DENTISTS 13 11 8 8 62 100 0 0 3.5
3111 PHYSICIANS AND SURGEONS 59 38 32 27 54 100 0 0 3.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8599 OTHER PRODUCT FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, N.E.C. 120 110 1 1 0.83 0 100 0 5.5 44
9317 PACKAGING OCCUPATIONS, N.E.C. 140 130 1 1 0.74 0 100 0 5 40
8179 CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING OCCUPATIONS, N.E.C. 21 19 3 2 14 0 100 0 2.4 25
6143 BARBERS, HAIRDRESSERS AND RELATED OCCUPATIONS 110 77 69 48 63 23 77 0 0.44 3.5
8584 INDUSTRIAL, FARM AND CONSTRUCTION MACHINERY MECHANICS AND REPAIRMEN 170 130 2 1 1.2 0 100 0 0.44 3.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 41 cells have a non null probability of exposure, with 17 lower than 5% and 24 greater than 5%. The median and range of probability values among cells with >5% probability is 28% [5.6-94].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9711 Barber Shops 36 30 34 28 94 21 79 0 3.5
8613 Extended Care Hospitals 23 20 16 13 70 62 38 0 2.5
8634 Home Care Services (Including Home Nursing) 21 18 14 12 67 100 0 0 2.5
9712 Beauty Shops 51 36 22 16 43 14 86 0 3.5
8619 Other Specialty Hospitals 22 16 9 7 41 78 22 0 2.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3741 Pharmaceutical and Medicine Industry 150 110 3 2 2 33 67 0 0.44 3.5
9711 Barber Shops 36 30 34 28 94 21 79 0 0.44 3.5
9712 Beauty Shops 51 36 22 16 43 14 86 0 0.38 3.5
7741 Advertising Agencies 71 56 1 1 1.4 100 0 0 0.25 10
9713 Combination Barber and Beauty Shops 21 13 8 3 38 62 38 0 0.25 7.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Calcium carbonate

A mineral occurring naturally in a great variety of calcite rocks which are collectively known as limestone. It has been used as a flux in the melting of iron, as a filler in asphalt, putty, crayons, paints, rubber, plastics and linoleum, for writing on blackboards and as a mild abrasive in polishes.


In the current CANJEM database, 1089 jobs are exposed at low concentration, 224 at medium, and 75 at high, for a total of 4.4 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 129 cells have a non null probability of exposure, with 62 lower than 5% and 67 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-92].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
2731 ELEMENTARY AND KINDERGARTEN TEACHERS 280 180 260 180 92 100 0.39 0 10
2733 SECONDARY SCHOOL TEACHERS 260 180 230 160 89 100 0.44 0 6
2711 UNIVERSITY TEACHERS 74 56 65 51 88 95 4.6 0 6
2793 POST-SECONDARY SCHOOL TEACHERS, N.E.C. 31 26 23 19 74 100 0 0 10
2791 COMMUNITY COLLEGE AND VOCATIONAL SCHOOL TEACHERS 80 69 52 47 65 98 1.9 0 6

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
5173 SALESMEN AND TRADERS, SECURITIES 13 13 1 1 7.7 0 0 100 25 40
2142 CHEMICAL ENGINEERS 30 12 1 1 3.3 0 0 100 19 30
6198 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK. SERVICES 230 210 1 1 0.43 0 0 100 19 30
7717 MINING AND QUARRYING: CUTTING, HANDLING AND LOADING OCCUPATIONS 12 12 5 5 42 20 20 60 19 40
8371 CUTTING AND SHAPING OCCUPATIONS:CLAY, GLASS, STONE AND RELATED MATERIAL 19 16 8 5 42 0 0 100 19 30

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 141 cells have a non null probability of exposure, with 66 lower than 5% and 75 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5-67].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
812 Protective Services 18 17 12 11 67 17 67 17 40
8511 Elementary and Secondary Education 740 480 480 320 65 99 1 0 10
811 Defence Services 12 9 7 5 58 0 29 71 30
3599 Other Non-Metallic Mineral Products Industries n.e.c. 13 11 7 6 54 0 14 86 30
613 Women’s Clothing Stores 16 12 8 6 50 12 25 62 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
611 Shoe Stores 33 28 6 5 18 0 17 83 28 46
612 Men’s Clothing Stores 26 25 5 5 19 0 40 60 25 40
613 Women’s Clothing Stores 16 12 8 6 50 12 25 62 25 40
3352 Electronic Parts and Components Industry 57 41 1 1 1.8 0 0 100 19 30
3511 Clay Products Industry (From Domestic Clay) 17 15 1 1 5.9 0 0 100 19 30

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Portland cement

A powder that can be made into a paste by the addition of water, used in construction for bonding bricks, concrete blocks and stone and for producing concrete slabs, pipes, etc. It consists of about 75% calcium silicates, 5-10% calcium aluminates, 5% calcium sulphate, 5 to 10% calcium-aluminium-iron compounds and 1 to 4% oxides of sodium, potassium and magnesium.


In the current CANJEM database, 291 jobs are exposed at low concentration, 401 at medium, and 60 at high, for a total of 2.4 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 87 cells have a non null probability of exposure, with 52 lower than 5% and 35 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-83].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 96 80 83 17 79 4.2 5
8783 CONCRETE FINISHING AND RELATED OCCUPATIONS 46 41 35 30 76 8.6 83 8.6 5
8153 SEPARATING, CRUSHING, GRINDING AND MIXING OCCUPATIONS: CLAY, GLASS AND STONE 11 11 7 7 64 0 43 57 35
8798 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, OTHER CONSTRUCTION TRADES 320 280 160 150 52 42 56 2.4 5
8158 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CLAY, GLASS AND STONE PROCESSING AND FORMING 25 25 11 11 44 9.1 55 36 35

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9317 PACKAGING OCCUPATIONS, N.E.C. 140 130 3 3 2.2 0 0 100 22 35
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 2 2 8.7 0 50 50 13 35
8310 FOREMEN, METAL MACHINING OCCUPATIONS 25 22 1 1 4 0 0 100 9.4 15
8153 SEPARATING, CRUSHING, GRINDING AND MIXING OCCUPATIONS: CLAY, GLASS AND STONE 11 11 7 7 64 0 43 57 8.5 35
8156 INSPECTING, TESTING AND GRADING OCCUPATIONS: CLAY, GLASS AND STONE PROCESSING AND FORMING 15 13 2 2 13 0 100 0 7.2 38

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 96 cells have a non null probability of exposure, with 45 lower than 5% and 51 greater than 5%. The median and range of probability values among cells with >5% probability is 16% [5.1-83].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4231 Masonry Work 60 49 50 42 83 24 72 4 5
3541 Concrete Pipe Industry 10 8 8 7 80 25 38 38 32
4276 Terrazzo and Tile Work 10 10 8 8 80 0 88 12 5
4224 Concrete Pouring and Finishing 37 33 24 22 65 21 71 8.3 5
3542 Structural Concrete Products Industry 11 8 7 4 64 0 71 29 35

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
4555 Marine Shipping Agencies Industry 13 7 2 1 15 0 50 50 13 35
3542 Structural Concrete Products Industry 11 8 7 4 64 0 71 29 6 35
3511 Clay Products Industry (From Domestic Clay) 17 15 1 1 5.9 0 100 0 4.4 35
3521 Hydraulic Cement Industry 43 38 26 24 60 27 38 35 4.4 35
3592 Asbestos Products Industry 53 44 21 18 40 33 38 29 4.4 35

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Brick dust

Dust generated by the cutting or breaking of bricks, excluding fireclay bricks used for refractory purposes. Included are bricks made from hard burned clay used for buildings, walls and paving, and bricks used for fancy walls which are made with sand or lime.


In the current CANJEM database, 238 jobs are exposed at low concentration, 109 at medium, and 6 at high, for a total of 1.1 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 41 cells have a non null probability of exposure, with 23 lower than 5% and 18 greater than 5%. The median and range of probability values among cells with >5% probability is 7.9% [5.3-75].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6111 FIRE-FIGHTING OCCUPATIONS 63 57 47 45 75 100 0 0 1
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 80 65 70 42 56 1.2 9
8798 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, OTHER CONSTRUCTION TRADES 320 280 89 84 28 73 26 1.1 4
8158 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CLAY, GLASS AND STONE PROCESSING AND FORMING 25 25 3 3 12 33 33 33 50
8786 INSULATING OCCUPATIONS, CONSTRUCTION 23 21 2 2 8.7 100 0 0 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9315 MATERIAL HANDLING EQUIPMENT OPERATORS, N.E.C. 92 88 1 1 1.1 0 0 100 25 40
8158 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CLAY, GLASS AND STONE PROCESSING AND FORMING 25 25 3 3 12 33 33 33 6.2 50
9918 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, N.E.C. 59 54 1 1 1.7 0 100 0 1.3 5.2
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 1 1 0.32 0 100 0 1 8
1143 PRODUCTION MANAGEMENT OCCUPATIONS 100 78 1 1 0.98 100 0 0 0.75 30

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 51 cells have a non null probability of exposure, with 27 lower than 5% and 24 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5.3-84].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8324 Firefighting Services 43 39 36 34 84 100 0 0 1
4231 Masonry Work 60 49 43 36 72 44 56 0 6
4211 Wrecking and Demolition 31 26 20 19 65 30 70 0 6.5
3511 Clay Products Industry (From Domestic Clay) 17 15 6 6 35 50 17 33 35
4013 Residential Renovation 90 74 27 26 30 70 30 0 1

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3549 Other Concrete Products Industries 16 15 2 2 12 50 0 50 13 33
3511 Clay Products Industry (From Domestic Clay) 17 15 6 6 35 50 17 33 3.6 35
9741 Private Households 300 240 1 1 0.33 0 100 0 3.2 26
1092 Dry Pasta Products Industry 25 14 1 1 4 100 0 0 1.4 40
8359 Other General Administrative Services 100 85 1 1 1 0 100 0 1.3 5.2

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Concrete dust

Dust generated by the cutting, polishing or breaking of concrete which consists of Portland cement, sand, gravel or crushed rock and water. Cast concrete is placed in forms, in a wet state, at the point of use at the construction site and allowed to harden into the form of beams, floor slabs and walls.


In the current CANJEM database, 516 jobs are exposed at low concentration, 455 at medium, and 85 at high, for a total of 3.3 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 91 cells have a non null probability of exposure, with 47 lower than 5% and 44 greater than 5%. The median and range of probability values among cells with >5% probability is 20% [5.4-85].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8783 CONCRETE FINISHING AND RELATED OCCUPATIONS 46 41 39 36 85 7.7 67 26 28
6111 FIRE-FIGHTING OCCUPATIONS 63 57 47 45 75 100 0 0 1
8798 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, OTHER CONSTRUCTION TRADES 320 280 230 200 72 39 49 12 5
8153 SEPARATING, CRUSHING, GRINDING AND MIXING OCCUPATIONS: CLAY, GLASS AND STONE 11 11 5 5 45 40 0 60 28
8733 CONSTRUCTION ELECTRICIANS AND REPAIR WORKERS 140 100 61 49 45 61 38 1.6 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8719 EXCAVATING, GRADING, PAVING AND RELATED OCCUPATIONS, N.E.C. 12 12 5 5 42 0 0 100 18 28
9315 MATERIAL HANDLING EQUIPMENT OPERATORS, N.E.C. 92 88 2 2 2.2 50 0 50 13 34
8155 FORMING OCCUPATIONS: CLAY, GLASS AND STONE 24 23 5 4 21 0 80 20 8.4 40
8158 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CLAY, GLASS AND STONE PROCESSING AND FORMING 25 25 8 8 32 12 62 25 4.2 34
1116 INSPECTORS AND REGULATORY OFFICERS, GOVERNMENT 87 69 1 1 1.1 0 100 0 3.5 28

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 127 cells have a non null probability of exposure, with 61 lower than 5% and 66 greater than 5%. The median and range of probability values among cells with >5% probability is 17% [5-100].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3542 Structural Concrete Products Industry 11 8 11 8 100 27 64 9.1 28
8324 Firefighting Services 43 39 36 34 84 100 0 0 1
4224 Concrete Pouring and Finishing 37 33 29 26 78 21 55 24 10
4276 Terrazzo and Tile Work 10 10 7 7 70 0 71 29 28
4211 Wrecking and Demolition 31 26 21 20 68 24 43 33 28

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
5999 Other Products n.e.c., Wholesale 84 80 1 1 1.2 0 0 100 18 28
6351 Garages (General Repairs) 260 200 1 1 0.38 0 0 100 18 28
4921 Gas Distribution Systems Industry 41 30 2 2 4.9 50 0 50 8.8 14
4121 Highways, Streets and Bridges 120 97 36 33 31 19 69 11 3.5 28
4211 Wrecking and Demolition 31 26 21 20 68 24 43 33 3.5 28

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Refractory brick dust

Dust generated by cutting or breaking of refractory bricks. These bricks are used to withstand the effect of thermal, chemical and physical extremes met within furnaces during standard operating procedures. Although silica and fire-clay bricks are the most widely used, alumino-silicate, basic or other refractories are included. The steel industry has been the largest consumer of refractory bricks for the lining of blast furnaces, stoves, open hearths and other furnaces. Other industrial uses include foundries, pottery kilns, boilers and glass furnaces.


In the current CANJEM database, 20 jobs are exposed at low concentration, 28 at medium, and 25 at high, for a total of 0.23 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 20 cells have a non null probability of exposure, with 16 lower than 5% and 4 greater than 5%. The median and range of probability values among cells with >5% probability is 5.4% [5-26].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 30 23 26 30 30 40 4.6
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 1 1 5.6 0 100 0 4
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 3 3 5.3 0 67 33 5.2
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 2 2 5 50 50 0 24
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 1 1 4.3 0 0 100 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
1145 MANAGEMENT OCCUPATIONS, CONSTRUCTION OPERATIONS 88 66 1 1 1.1 0 0 100 16 25
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 1 1 4.3 0 0 100 9.8 20
8155 FORMING OCCUPATIONS: CLAY, GLASS AND STONE 24 23 1 1 4.2 0 100 0 3.8 30
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 3 3 5.3 0 67 33 2.5 5.2
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 2 2 5 50 50 0 1 24

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 32 cells have a non null probability of exposure, with 22 lower than 5% and 10 greater than 5%. The median and range of probability values among cells with >5% probability is 7.7% [5.3-22].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4231 Masonry Work 60 49 13 12 22 46 31 23 2
3699 Other Petroleum and Coal Products Industries 16 14 2 1 12 0 0 100 30
4243 Wet Heating and Air Conditioning Work 23 21 2 1 8.7 0 50 50 5.2
2619 Other Household Furniture Industries 13 12 1 1 7.7 100 0 0 1.8
4299 Other Trade Work n.e.c. 13 9 1 1 7.7 100 0 0 5.2

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
4921 Gas Distribution Systems Industry 41 30 2 1 4.9 0 0 100 25 40
2941 Iron Foundries 50 45 2 1 4 0 0 100 19 30
3699 Other Petroleum and Coal Products Industries 16 14 2 1 12 0 0 100 19 30
3199 Other Machinery and Equipment Industries n.e.c. 60 49 1 1 1.7 0 0 100 16 25
3511 Clay Products Industry (From Domestic Clay) 17 15 1 1 5.9 0 100 0 3.8 30

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Calcium oxide

Also known as lime, calcium oxide is produced by calcining limestone (calcium carbonate). Large amounts of lime (or hydrated lime, Ca(OH)2, which was also coded here) have been used in pulp and paper making, as a soil treatment in agriculture and as a ‘whitewash’ to coat stables, dairies and other farm buildings. It has also been used in masonry mortars, plasters, stucco, and unhairing of skins in leather manufacturing.


In the current CANJEM database, 282 jobs are exposed at low concentration, 733 at medium, and 26 at high, for a total of 3.3 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 89 cells have a non null probability of exposure, with 51 lower than 5% and 38 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5.3-90].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
7131 FARM MANAGEMENT OCCUPATIONS 62 55 56 49 90 1.8 98 0 0.8
7191 DAIRY WORKERS, FARM 46 45 41 40 89 12 88 0 0.8
7181 GENERAL WORKERS, FARM 450 420 350 320 77 8.6 91 0 0.8
8784 PLASTERERS AND RELATED OCCUPATIONS 46 37 32 25 70 9.4 75 16 5
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 78 65 68 19 76 5.1 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9317 PACKAGING OCCUPATIONS, N.E.C. 140 130 3 3 2.2 33 0 67 16 25
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 1 1 1.7 0 100 0 3.1 25
8588 PRECISION INSTRUMENT MECHANICS AND REPAIRMEN 14 13 1 1 7.1 0 0 100 3.1 5
9175 TRUCK DRIVERS 1100 710 3 3 0.28 33 0 67 3.1 5
8155 FORMING OCCUPATIONS: CLAY, GLASS AND STONE 24 23 2 2 8.3 0 100 0 1.9 15

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 141 cells have a non null probability of exposure, with 73 lower than 5% and 68 greater than 5%. The median and range of probability values among cells with >5% probability is 9.7% [5-85].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
171 Leather and Allied Products Industries 390 360 330 310 85 5.7 94 0 0.8
111 Soft Drink Industry 63 61 51 50 81 12 88 0 0.8
4271 Plastering and Stucco Work 36 27 26 21 72 0 85 15 5
159 Other Rubber Products Industries 80 73 55 49 69 1.8 96 1.8 0.8
4231 Masonry Work 60 49 41 36 68 24 71 4.9 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
4564 Dry Bulk Materials Trucking Industry 34 31 2 2 5.9 0 50 50 8.1 15
8171 Transportation and Communication Administration 47 36 1 1 2.1 0 100 0 4.5 40
1711 Leather Tanneries 25 23 3 3 12 33 33 33 3.1 5
2721 Asphalt Roofing Industry 28 25 1 1 3.6 0 100 0 3.1 25
3511 Clay Products Industry (From Domestic Clay) 17 15 1 1 5.9 0 100 0 3.1 25

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Calcium sulphate

Also known as gypsum, calcium sulphate is a widely distributed naturally occurring mineral. It has been used to produce gypsum wallboard which consists of a core of gypsum sandwiched between two layers of paper. Other uses have been as dental plasters for making tooth impressions, orthopedic plasters, pottery plasters, lamp bases, and patching compounds.


In the current CANJEM database, 507 jobs are exposed at low concentration, 543 at medium, and 81 at high, for a total of 3.6 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 98 cells have a non null probability of exposure, with 56 lower than 5% and 42 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-93].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8784 PLASTERERS AND RELATED OCCUPATIONS 46 37 43 34 93 7 21 72 25
6111 FIRE-FIGHTING OCCUPATIONS 63 57 48 46 76 40 60 0 1
3157 DENTURISTS, DENTAL HYGIENISTS, 43 26 31 18 72 55 42 3.2 4
8785 PAINTERS, PAPERHANGERS AND RELATED OCCUPATIONS 180 130 130 98 72 22 77 1.5 4
8733 CONSTRUCTION ELECTRICIANS AND REPAIR WORKERS 140 100 82 64 60 46 54 0 4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 1 1 0.32 0 0 100 25 40
9317 PACKAGING OCCUPATIONS, N.E.C. 140 130 2 2 1.5 0 0 100 25 40
8578 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: FABRICATING, ASSEMBLING AND REPAIRING RUBBER, PLASTIC AND RELATED PRODUCTS 26 24 1 1 3.8 0 0 100 22 60
8395 PATTERNMAKERS AND MOULDMAKERS, N.E.C. 11 11 1 1 9.1 0 0 100 15 25
8784 PLASTERERS AND RELATED OCCUPATIONS 46 37 43 34 93 7 21 72 15 25

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 133 cells have a non null probability of exposure, with 67 lower than 5% and 66 greater than 5%. The median and range of probability values among cells with >5% probability is 10% [5-86].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4271 Plastering and Stucco Work 36 27 31 23 86 0 26 74 25
8324 Firefighting Services 43 39 37 35 86 49 51 0 1
8668 Offices of Denturists 18 13 15 10 83 20 73 6.7 4
4275 Painting and Decorating Work 150 110 110 85 73 18 80 1.9 4
4013 Residential Renovation 90 74 62 54 69 53 29 18 4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
1599 Other Rubber Products Industries 59 46 1 1 1.7 0 0 100 22 60
4271 Plastering and Stucco Work 36 27 31 23 86 0 26 74 15 25
3211 Aircraft and Aircraft Parts Industry 530 370 2 2 0.38 0 50 50 7.9 14
3731 Plastic and Synthetic Resin Industry 19 16 1 1 5.3 0 0 100 7.5 20
3999 Other Manufactured Products Industries n.e.c. 60 54 5 5 8.3 20 20 60 7.5 25

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Glass dust

Glass is an inorganic product of fusion which has cooled to a rigid solid without undergoing crystallization. The properties of glasses are determined by their chemical composition and since this can vary infinitely, there are thousands of different glasses available. Potential exposures have been in the construction industry (cutting and installing glass doors and windows) and during grinding, buffing or polishing of optical lenses, prisms, and reflective optics.


In the current CANJEM database, 67 jobs are exposed at low concentration, 41 at medium, and 16 at high, for a total of 0.39 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 43 cells have a non null probability of exposure, with 31 lower than 5% and 12 greater than 5%. The median and range of probability values among cells with >5% probability is 14% [5-73].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8795 GLAZIERS 11 9 8 8 73 38 50 12 22
8373 ABRADING AND POLISHING OCCUPATIONS: CLAY, GLASS, STONE AND RELATED MATERIALS 17 13 12 10 71 17 25 58 40
8156 INSPECTING, TESTING AND GRADING OCCUPATIONS: CLAY, GLASS AND STONE PROCESSING AND FORMING 15 13 8 7 53 75 25 0 40
8155 FORMING OCCUPATIONS: CLAY, GLASS AND STONE 24 23 10 10 42 50 50 0 40
8371 CUTTING AND SHAPING OCCUPATIONS:CLAY, GLASS, STONE AND RELATED MATERIAL 19 16 7 7 37 0 71 29 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8373 ABRADING AND POLISHING OCCUPATIONS: CLAY, GLASS, STONE AND RELATED MATERIALS 17 13 12 10 71 17 25 58 25 40
9315 MATERIAL HANDLING EQUIPMENT OPERATORS, N.E.C. 92 88 2 2 2.2 0 0 100 25 40
8393 FILING, GRINDING, BUFFING, CLEANING AND POLISHING OCCUPATIONS, N.E.C. 100 83 2 2 1.9 0 100 0 5.6 45
8158 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CLAY, GLASS AND STONE PROCESSING AND FORMING 25 25 4 4 16 0 75 25 5 40
8371 CUTTING AND SHAPING OCCUPATIONS:CLAY, GLASS, STONE AND RELATED MATERIAL 19 16 7 7 37 0 71 29 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 33 cells have a non null probability of exposure, with 19 lower than 5% and 14 greater than 5%. The median and range of probability values among cells with >5% probability is 9.1% [5.6-71].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4233 Glass and Glazing Work 17 14 12 12 71 67 33 0 2.5
3561 Primary Glass and Glass Containers Industry 71 55 45 36 63 60 29 11 40
3562 Glass Products Industry (Except Glass Containers) 27 24 17 15 63 24 35 41 40
8666 Offices of Optometrists 10 6 3 1 30 33 67 0 2.5
3031 Metal Door and Window Industry 38 29 5 4 13 80 0 20 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3063 Hand Tool and Implement Industry 11 9 1 1 9.1 0 100 0 5 40
3562 Glass Products Industry (Except Glass Containers) 27 24 17 15 63 24 35 41 5 40
4011 Single Family Housing 350 290 1 1 0.28 0 100 0 5 40
2543 Wooden Door and Window Industry 34 26 2 1 5.9 0 100 0 4 40
3561 Primary Glass and Glass Containers Industry 71 55 45 36 63 60 29 11 1.1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Ashes

The non-combustible residue left after the burning of any susbtance. They contain the residues of all non-volatile substances (e.g. oxides, salts, non-metallic elements) that may have been present in fuel. They are found in largest quantities in industrial processes in which fuel is converted into heat in furnaces, kilns, ovens and boilers.


In the current CANJEM database, 526 jobs are exposed at low concentration, 94 at medium, and 69 at high, for a total of 2.2 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 55 cells have a non null probability of exposure, with 36 lower than 5% and 19 greater than 5%. The median and range of probability values among cells with >5% probability is 18% [5-84].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6111 FIRE-FIGHTING OCCUPATIONS 63 57 53 50 84 13 75 11 2.5
6133 LODGING CLEANERS, EXCEPT PRIVATE HOUSEHOLD 47 42 24 22 51 100 0 0 2.5
6125 FOOD AND BEVERAGE SERVING OCCUPATIONS 590 400 270 180 46 100 0 0 2.5
6123 BARTENDERS 110 90 48 37 42 100 0 0 5
9157 ENGINE AND BOILER ROOM CREW, SHIP 41 35 17 17 41 5.9 24 71 2.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8165 DISTILLING, SUBLIMING AND CARBONIZING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 13 13 2 2 15 0 0 100 12 19
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 2 2 1.7 50 0 50 11 19
9311 HOISTING OCCUPATIONS, N.E.C. 80 59 1 1 1.2 0 100 0 5.6 45
9131 LOCOMOTIVE OPERATING OCCUPATIONS 20 14 6 6 30 0 100 0 4.5 36
8780 FOREMEN/WOMEN, OTHER CONSTRUCTION TRADES OCCUPATIONS 100 90 1 1 0.97 0 100 0 2.7 36

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 103 cells have a non null probability of exposure, with 72 lower than 5% and 31 greater than 5%. The median and range of probability values among cells with >5% probability is 9.5% [5-88].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8324 Firefighting Services 43 39 38 35 88 11 74 16 2.5
9221 Taverns, Bars and Night Clubs 190 150 98 74 51 100 0 0 3
9212 Restaurants, Unlicensed (Including Drive-Ins) 300 220 91 66 31 100 0 0 2.5
9953 Janitorial Services 110 100 35 33 31 100 0 0 2.5
4521 Airport Operations Industry 17 17 4 4 24 100 0 0 3.8

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9959 Other Services to Buildings and Dwellings 13 12 2 2 15 0 50 50 12 20
2912 Steel Foundries 91 63 4 2 4.4 0 75 25 5.6 45
2721 Asphalt Roofing Industry 28 25 1 1 3.6 0 100 0 4.8 48
2619 Other Household Furniture Industries 13 12 1 1 7.7 0 100 0 4.4 35
2512 Sawmill and Planing Mill Products Industry (Except Shingles and Shakes) 76 64 1 1 1.3 0 0 100 4.1 6.6

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Sodium carbonate

Also known as soda ash, this chemical is an odorless, white, hygroscopic powder considered to be one of the most important industrial alkalis. It occurs naturally but may also be manufactured from salt, ammonia and carbon dioxide. It has been used for cleansing, for softening water, for conditioning boiler feed water (lime-soda process), in glass as a flux to prevent fogging, for refining oils, for the treatment of ores, in the wood-pulp industry, and in soap making.


In the current CANJEM database, 272 jobs are exposed at low concentration, 62 at medium, and 2 at high, for a total of 1.1 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 53 cells have a non null probability of exposure, with 36 lower than 5% and 17 greater than 5%. The median and range of probability values among cells with >5% probability is 13% [5.8-67].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9533 STATIONARY ENGINE AND AUXILIARY EQUIPMENT OPERATING AND MAINTAINING OCCUPATIONS 100 63 69 45 67 32 68 0 1
9591 PHOTOGRAPHIC PROCESSING AND FINISHING OCCUPATIONS 18 17 11 11 61 100 0 0 0.5
6142 HOUSEKEEPERS, SERVANTS AND RELATED OCCUPATIONS 170 150 47 43 28 100 0 0 1.5
3315 PHOTOGRAPHERS AND CAMERAMEN 25 21 5 5 20 100 0 0 3.5
9535 WATER AND SANITATION UTILITIES EQUIPMENT OPERATING OCCUPATIONS 11 10 2 2 18 100 0 0 2.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8783 CONCRETE FINISHING AND RELATED OCCUPATIONS 46 41 1 1 2.2 0 0 100 25 40
8173 COATING AND CALENDERING OCCUPATIONS, CHEMICAL AND RELATED MATERIALS 13 12 1 1 7.7 100 0 0 1 40
8584 INDUSTRIAL, FARM AND CONSTRUCTION MACHINERY MECHANICS AND REPAIRMEN 170 130 2 2 1.2 50 50 0 0.56 20
8227 BEVERAGE PROCESSING OCCUPATIONS 15 15 2 2 13 100 0 0 0.5 20
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 1 1 1.8 0 100 0 0.44 3.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 94 cells have a non null probability of exposure, with 63 lower than 5% and 31 greater than 5%. The median and range of probability values among cells with >5% probability is 7.9% [5-43].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9931 Photographers 30 27 13 12 43 100 0 0 3
9953 Janitorial Services 110 100 27 24 24 100 0 0 5
8646 Meal Services (Non-Commercial) 14 8 3 3 21 100 0 0 2.5
3729 Other Agricultural Chemical Industries 10 7 2 1 20 0 100 0 1
9121 Lodging Houses and Residential Clubs 16 15 3 3 19 100 0 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
4022 Commercial Building 170 140 1 1 0.59 0 0 100 25 40
3761 Soap and Cleaning Compounds Industry 16 16 1 1 6.2 0 0 100 2.2 3.5
1111 Soft Drink Industry 110 92 1 1 0.91 100 0 0 1 40
3611 Refined Petroleum Products Industry (Except Lubricating Oil and Grease) 170 130 1 1 0.57 0 100 0 0.62 5
1599 Other Rubber Products Industries 59 46 2 2 3.4 50 50 0 0.56 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Sodium hydrosulphite

This white crystalline powder is a very powerful reducing agent. It has been used in dyeing and printing textiles, particularly in vat dyeing, as well as for stripping badly dyed materials and as a bleaching agent.


In the current CANJEM database, 39 jobs are exposed at low concentration, 9 at medium, and 7 at high, for a total of 0.17 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 23 cells have a non null probability of exposure, with 17 lower than 5% and 6 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [7.4-56].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9591 PHOTOGRAPHIC PROCESSING AND FINISHING OCCUPATIONS 18 17 10 9 56 100 0 0 0.5
8275 TEXTILE FINISHING AND CALENDERING OCCUPATIONS 13 13 3 3 23 0 100 0 40
3315 PHOTOGRAPHERS AND CAMERAMEN 25 21 5 3 20 100 0 0 1
8260 FOREMAN, TEXTILE PROCESSING OCCUPATION S 19 18 2 2 11 0 0 100 2.5
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 5 3 8.3 20 80 0 2.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8275 TEXTILE FINISHING AND CALENDERING OCCUPATIONS 13 13 3 3 23 0 100 0 5 40
8260 FOREMAN, TEXTILE PROCESSING OCCUPATION S 19 18 2 2 11 0 0 100 1.6 2.5
9317 PACKAGING OCCUPATIONS, N.E.C. 140 130 1 1 0.74 0 0 100 1.6 2.5
9315 MATERIAL HANDLING EQUIPMENT OPERATORS, N.E.C. 92 88 1 1 1.1 100 0 0 1.5 60
8799 OTHER CONSTRUCTION TRADES OCCUPATIONS, N.E.C. 290 240 1 1 0.34 100 0 0 1.2 50

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 18 cells have a non null probability of exposure, with 13 lower than 5% and 5 greater than 5%. The median and range of probability values among cells with >5% probability is 10% [6.2-33].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9931 Photographers 30 27 10 8 33 100 0 0 0.5
1992 Contract Textile Dyeing and Finishing Industry 65 48 15 12 23 20 47 33 2.5
3729 Other Agricultural Chemical Industries 10 7 1 1 10 0 0 100 2.5
6571 Camera and Photographic Supply Stores 10 9 1 1 10 100 0 0 0.5
1821 Wool Yarn and Woven Cloth Industry 16 16 1 1 6.2 100 0 0 2.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
1992 Contract Textile Dyeing and Finishing Industry 65 48 15 12 23 20 47 33 1.6 2.5
3729 Other Agricultural Chemical Industries 10 7 1 1 10 0 0 100 1.6 2.5
2711 Pulp Industry 90 77 3 3 3.3 100 0 0 1.2 50
1829 Other Spun Yarn and Woven Cloth Industries 130 110 4 4 3.1 50 25 25 0.66 2.5
1821 Wool Yarn and Woven Cloth Industry 16 16 1 1 6.2 100 0 0 0.062 2.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Sulfur

A non-metallic element which exists in several allotropic forms, obtained by the distillation of iron pyrites, as a by-product of metal smelting, and from natural gas. Its most important use (90 %) has been in the production of sulphuric acid. Other uses have included match manufacture, vulcanization of rubber, bleaching agent of paper pulp and wool, and as an agricultural insecticide.


In the current CANJEM database, 46 jobs are exposed at low concentration, 71 at medium, and 6 at high, for a total of 0.39 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 53 cells have a non null probability of exposure, with 37 lower than 5% and 16 greater than 5%. The median and range of probability values among cells with >5% probability is 8.8% [5-24].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8573 MOULDING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 21 19 5 5 24 40 60 0 40
8571 BONDING AND CEMENTING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 15 14 3 3 20 33 67 0 40
7131 FARM MANAGEMENT OCCUPATIONS 62 55 12 11 19 8.3 92 0 1
8575 CUTTING AND FINISHING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 12 11 2 2 17 50 50 0 40
8173 COATING AND CALENDERING OCCUPATIONS, CHEMICAL AND RELATED MATERIALS 13 12 2 2 15 0 100 0 21

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2165 ARCHITECTURAL AND ENGINEERING TECHNOLOGISTS AND TECHNICIANS 110 71 1 1 0.93 0 100 0 5 40
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 1 1 4.3 0 100 0 5 40
8258 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, PULP AND PAPERMAKING 13 13 1 1 7.7 0 100 0 5 40
8529 OTHER FABRICATING AND ASSEMBLING OCCUPATIONS, METAL PRODUCTS, N.E.C. 55 49 1 1 1.8 0 100 0 5 40
8571 BONDING AND CEMENTING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 15 14 3 3 20 33 67 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 34 cells have a non null probability of exposure, with 20 lower than 5% and 14 greater than 5%. The median and range of probability values among cells with >5% probability is 7% [5.2-47].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
1599 Other Rubber Products Industries 59 46 28 26 47 50 46 3.6 37
5929 Other Paper and Paper Products, Wholesale 10 9 2 1 20 100 0 0 2.5
1511 Tire and Tube Industry 13 12 2 2 15 100 0 0 40
141 NA 26 25 3 2 12 100 0 0 1.6
3792 Adhesives Industry 22 13 2 1 9.1 50 50 0 21

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
5971 Industrial and Household Chemicals, Wholesale 23 21 1 1 4.3 0 100 0 5 40
2711 Pulp Industry 90 77 2 2 2.2 0 50 50 2.8 20
3792 Adhesives Industry 22 13 2 1 9.1 50 50 0 2.5 21
2961 Aluminum Rolling, Casting and Extruding Industry 26 25 1 1 3.8 0 0 100 1.6 2.5
3592 Asbestos Products Industry 53 44 3 2 5.7 100 0 0 1.5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Hydrogen fluoride

Anhydrous hydrogen fluoride is a colorless gas prepared by the action of sulphuric acid on calcium fluoride. It is strongly corrosive and irritating. Aqueous solution and salts of hydrofluoric acid are used in the production of fluorides and plastics, in frosting and etching glass, in polishing crystals, in enameling and galvanizing iron, in working silk, in analytic chemistry, and to increase the porosity of ceramics. Many occupational exposures resulted from thermal degradation of fluoride coatings on welding electrodes.


In the current CANJEM database, 271 jobs are exposed at low concentration, 47 at medium, and 4 at high, for a total of 1 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 53 cells have a non null probability of exposure, with 25 lower than 5% and 28 greater than 5%. The median and range of probability values among cells with >5% probability is 8.1% [5.6-45].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 140 88 45 89 11 0 20
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 5 5 18 100 0 0 10
8513 MOTOR VEHICLE FABRICATING AND ASSEMBLING OCCUPATIONS, N.E.C. 12 12 2 2 17 100 0 0 15
8333 SHEET-METAL WORKERS 88 65 13 8 15 92 7.7 0 10
8523 INDUSTRIAL, FARM. CONSTRUCTION AND OTHER MECHANIZED EQUIPMENT AND MACHINERY FABRICATING AND ASSEMBLING OCCUPATIONS, N.E.C. 20 20 3 3 15 100 0 0 10

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8149 METAL PROCESSING AND RELATED OCCUPATIONS, N.E.C. 15 13 1 1 6.7 0 100 0 5 40
2165 ARCHITECTURAL AND ENGINEERING TECHNOLOGISTS AND TECHNICIANS 110 71 1 1 0.93 100 0 0 1.5 60
8393 FILING, GRINDING, BUFFING, CLEANING AND POLISHING OCCUPATIONS, N.E.C. 100 83 2 2 1.9 50 50 0 1.3 11
8511 ENGINE AND RELATED EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS, N.E.C. 11 11 1 1 9.1 0 100 0 1.2 10
8528 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, FABRICATING AND ASSEMBLING METAL PRODUCTS, N.E.C. 40 34 3 2 7.5 67 33 0 1.2 12

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 105 cells have a non null probability of exposure, with 59 lower than 5% and 46 greater than 5%. The median and range of probability values among cells with >5% probability is 7.7% [5.2-37].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9942 Welding 19 17 7 7 37 86 14 0 10
3241 Truck and Bus Body Industry 30 21 8 7 27 88 12 0 20
2951 Primary Production of Aluminum Industry 19 16 5 4 26 0 40 60 40
2961 Aluminum Rolling, Casting and Extruding Industry 26 25 6 6 23 100 0 0 10
3021 Metal Tanks (Heavy Gauge) Industry 13 9 3 2 23 100 0 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2951 Primary Production of Aluminum Industry 19 16 5 4 26 0 40 60 25 40
3561 Primary Glass and Glass Containers Industry 71 55 1 1 1.4 0 0 100 12 20
814 Foreign Affairs and International Assistance 16 13 1 1 6.2 0 100 0 5 40
3031 Metal Door and Window Industry 38 29 2 1 5.3 0 100 0 1.9 15
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 14 13 16 50 50 0 1.5 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Hydrogen sulphide

A flammable, poisonous gas which has the characteristic smell of rotten eggs. It occurs naturally as a decomposition product of metal sulphides and other organic matter in mines, springs and sewers. It is also a by-product of many chemical processes involving rayon, rubber, petroleum products, leather, and coke production.


In the current CANJEM database, 457 jobs are exposed at low concentration, 94 at medium, and 11 at high, for a total of 1.8 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 102 cells have a non null probability of exposure, with 63 lower than 5% and 39 greater than 5%. The median and range of probability values among cells with >5% probability is 13% [5.3-81].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6111 FIRE-FIGHTING OCCUPATIONS 63 57 51 48 81 24 76 0 7
8165 DISTILLING, SUBLIMING AND CARBONIZING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 13 13 9 9 69 100 0 0 28
7198 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: FARMING, HORTICULTURAL AND ANIMAL HUSBANDRY 37 35 21 20 57 100 0 0 14
7111 GENERAL FARMERS 38 38 19 19 50 95 5.3 0 21
7113 ANIMAL FARMERS 14 11 6 6 43 83 17 0 27

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8179 CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING OCCUPATIONS, N.E.C. 21 19 2 2 9.5 0 50 50 20 35
6125 FOOD AND BEVERAGE SERVING OCCUPATIONS 590 400 1 1 0.17 0 0 100 8.4 24
8583 RAIL TRANSPORT EQUIPMENT MECHANICS AND REPAIRMEN 58 55 1 1 1.7 0 100 0 5.5 40
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 4 3 3.5 25 75 0 4.5 34
9317 PACKAGING OCCUPATIONS, N.E.C. 140 130 1 1 0.74 0 0 100 4.4 7

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 90 cells have a non null probability of exposure, with 47 lower than 5% and 43 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-86].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8324 Firefighting Services 43 39 37 34 86 30 70 0 7
119 NA 80 73 64 59 80 100 0 0 19
631 Automobile Dealers 49 46 37 35 76 70 30 0 28
3611 Refined Petroleum Products Industry (Except Lubricating Oil and Grease) 170 130 76 60 44 88 6.6 5.3 28
111 Soft Drink Industry 63 61 24 22 38 100 0 0 21

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8111 Defence Services 1400 1200 2 2 0.15 50 0 50 20 32
9221 Taverns, Bars and Night Clubs 190 150 1 1 0.52 0 0 100 8.4 24
8254 Intergovernmental Affairs Administration 20 17 1 1 5 0 0 100 6.2 10
2441 Women’s Coat and Jacket Industry 71 60 1 1 1.4 0 100 0 4 40
3729 Other Agricultural Chemical Industries 10 7 3 1 30 0 100 0 3.5 28

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Hydrogen chloride

This colorless gas, heavier than air, may be used directly as a catalyst. However, the aqueous solution of hydrogen chloride, known as hydrochloric or muriatic acid, is more commonly used industrially for pickling and cleaning metal parts, in the production of glues, in the manufacture of chlorine and pharmaceuticals, for tanning, etching, and for treating oils and fats. Hydrogen chloride is also an unwanted contaminant in certain operations such as plastic pyrolysis (e.g., firefighters) and galvanizing.


In the current CANJEM database, 685 jobs are exposed at low concentration, 342 at medium, and 16 at high, for a total of 3.3 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 143 cells have a non null probability of exposure, with 69 lower than 5% and 74 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-83].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9591 PHOTOGRAPHIC PROCESSING AND FINISHING OCCUPATIONS 18 17 15 14 83 53 47 0 3
6111 FIRE-FIGHTING OCCUPATIONS 63 57 49 46 78 14 84 2 5
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 84 72 73 88 12 0 0.75
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 26 23 68 7.7 85 7.7 20
8791 PIPEFITTING, PLUMBING AND RELATED OCCUPATIONS, N.E.C. 200 130 120 80 59 59 39 1.7 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9311 HOISTING OCCUPATIONS, N.E.C. 80 59 1 1 1.2 0 0 100 25 40
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 2 2 8.7 50 0 50 8.7 16
6190 SUPERVISORS, OTHER SERVICE OCCUPATIONS 38 37 1 1 2.6 0 100 0 5 40
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 2 1 18 0 100 0 5 40
8393 FILING, GRINDING, BUFFING, CLEANING AND POLISHING OCCUPATIONS, N.E.C. 100 83 7 7 6.8 0 86 14 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 219 cells have a non null probability of exposure, with 102 lower than 5% and 117 greater than 5%. The median and range of probability values among cells with >5% probability is 9.1% [5-84].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8324 Firefighting Services 43 39 36 33 84 19 81 0 5
4231 Masonry Work 60 49 46 41 77 85 15 0 0.75
4241 Plumbing 130 92 81 59 63 57 43 0 5
4236 Sheet Metal and Built-up Roofing 12 12 7 7 58 43 57 0 5
9931 Photographers 30 27 17 14 57 76 24 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3061 Basic Hardware Industry 13 13 1 1 7.7 0 0 100 25 40
3041 Custom Coating of Metal Products Industry 33 23 17 14 52 5.9 94 0 5 40
3063 Hand Tool and Implement Industry 11 9 1 1 9.1 0 100 0 5 40
3299 Other Transportation Equipment Industries 11 11 1 1 9.1 0 100 0 5 40
3332 Electric Lamp and Shade Industry (Except Bulb and Tube) 26 23 1 1 3.8 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Nitrogen oxides

Formed when nitrogen is oxidized in a high temperature flame, an electric arc or an internal combustion engine. The source of the nitrogen is often the atmosphere itself of which nitrogen is a major constituent. The oxides are rarely released pure into the atmosphere, but occur as mixtures, the composition of which depends upon the source and the local conditions.


In the current CANJEM database, 2144 jobs are exposed at low concentration, 381 at medium, and 64 at high, for a total of 8.2 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 218 cells have a non null probability of exposure, with 74 lower than 5% and 144 greater than 5%. The median and range of probability values among cells with >5% probability is 17% [5-100].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
7715 BLASTING OCCUPATIONS 10 6 10 6 100 100 0 0 5.9
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 17 15 94 47 47 5.9 40
6111 FIRE-FIGHTING OCCUPATIONS 63 57 56 53 89 14 75 11 5.9
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 35 28 88 89 11 0 40
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 260 160 82 76 24 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3156 MEDICAL LABORATORY 37 24 1 1 2.7 0 100 0 5 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 17 15 94 47 47 5.9 5 40
8549 FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, WOO D PRODUCTS, N.E.C. 20 18 1 1 5 0 100 0 4.5 36
8229 FOOD, BEVERAGE AND RELATED PROCESSING OCCUPATIONS, N.E.C. 29 22 2 2 6.9 50 50 0 3.3 42
7717 MINING AND QUARRYING: CUTTING, HANDLING AND LOADING OCCUPATIONS 12 12 2 2 17 0 100 0 2.8 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 293 cells have a non null probability of exposure, with 88 lower than 5% and 205 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5-88].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8324 Firefighting Services 43 39 38 35 88 13 82 5.3 5.9
9942 Welding 19 17 16 14 84 56 44 0 40
613 Women’s Clothing Stores 16 12 12 9 75 50 50 0 5.9
2911 Ferro-alloys Industry 11 10 8 7 73 50 50 0 40
611 Shoe Stores 33 28 23 19 70 26 74 0 5.9

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2951 Primary Production of Aluminum Industry 19 16 7 6 37 14 71 14 9.8 40
3712 Industrial Organic Chemical Industries n.e.c. 23 18 3 3 13 33 67 0 4.5 36
2619 Other Household Furniture Industries 13 12 1 1 7.7 0 100 0 4.4 35
3511 Clay Products Industry (From Domestic Clay) 17 15 5 5 29 40 60 0 3.8 40
8159 Other General Administrative Services 56 41 2 2 3.6 50 50 0 3.1 23

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Hydrogen

Tthe lightest known substance. It is one of the main consitituents of coal gas. It is a colorless, odorless gas used as a rocket fuel, a welding fuel, a reducing agent, a reagent in various organic synthesis, a hydrogenating agent for vegetable or animal oils, and as a raw material in the manufacturing of ammonia and hydrogen chloride. Occupational exposures have mainly occured due to hydrogen being liberated as an unwanted by-product in industrial processes.


In the current CANJEM database, 96 jobs are exposed at low concentration, 40 at medium, and 10 at high, for a total of 0.46 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 48 cells have a non null probability of exposure, with 40 lower than 5% and 8 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5.3-76].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 29 26 76 62 38 0 40
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 3 2 27 33 67 0 40
8165 DISTILLING, SUBLIMING AND CARBONIZING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 13 13 3 3 23 67 0 33 40
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 3 3 13 0 100 0 40
2111 CHEMISTS 37 22 4 3 11 100 0 0 1.8

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8583 RAIL TRANSPORT EQUIPMENT MECHANICS AND REPAIRMEN 58 55 1 1 1.7 0 0 100 25 40
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 4 2 3.5 0 50 50 15 40
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 3 2 27 33 67 0 5 40
8160 FOREMEN: CHEMICALS, PETROLEUM, RUBBER, PLASTICS AND RELATED MATERIALS PROCESSING OCCUPATIONS 26 22 1 1 3.8 0 100 0 5 40
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 3 3 13 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 46 cells have a non null probability of exposure, with 36 lower than 5% and 10 greater than 5%. The median and range of probability values among cells with >5% probability is 8.8% [5.2-55].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3041 Custom Coating of Metal Products Industry 33 23 18 15 55 33 67 0 40
3699 Other Petroleum and Coal Products Industries 16 14 6 5 38 0 67 33 40
4921 Gas Distribution Systems Industry 41 30 10 8 24 30 20 50 40
3331 Lighting Fixture Industry 17 15 3 3 18 100 0 0 5
3299 Other Transportation Equipment Industries 11 11 1 1 9.1 100 0 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 2 2 2.3 50 0 50 13 22
3699 Other Petroleum and Coal Products Industries 16 14 6 5 38 0 67 33 5 40
4921 Gas Distribution Systems Industry 41 30 10 8 24 30 20 50 4.4 40
3711 Industrial Inorganic Chemical Industries n.e.c. 58 42 3 3 5.2 33 33 33 3.1 40
3712 Industrial Organic Chemical Industries n.e.c. 23 18 1 1 4.3 0 0 100 3.1 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Carbon monoxide

A colorless, tasteless and almost odorless gas which is lighter than air and burns in air with a blue flame. It is an active reducing agent for chemicals at elevated temperatures, but is mostly encountered as a waste product of incomplete combustion of carbonaceous material. Potential sources of carbon monoxide exposure include engine emissions (gasoline, diesel, jet fuel, etc.), foundry furnaces and other industrial furnaces, welding operations, etc.


In the current CANJEM database, 4439 jobs are exposed at low concentration, 1037 at medium, and 111 at high, for a total of 18 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 276 cells have a non null probability of exposure, with 57 lower than 5% and 219 greater than 5%. The median and range of probability values among cells with >5% probability is 18% [5-95].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 38 30 95 26 74 0 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 17 15 94 29 53 18 40
9533 STATIONARY ENGINE AND AUXILIARY EQUIPMENT OPERATING AND MAINTAINING OCCUPATIONS 100 63 94 59 91 63 34 3.2 36
6111 FIRE-FIGHTING OCCUPATIONS 63 57 57 54 90 8.8 21 70 10
9157 ENGINE AND BOILER ROOM CREW, SHIP 41 35 35 32 85 17 60 23 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8178 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING 23 23 5 5 22 0 80 20 7.5 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 17 15 94 29 53 18 6 40
8158 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: CLAY, GLASS AND STONE PROCESSING AND FORMING 25 25 10 10 40 30 40 30 5.2 40
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 38 30 95 26 74 0 5 40
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 5 5 13 40 60 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 417 cells have a non null probability of exposure, with 66 lower than 5% and 351 greater than 5%. The median and range of probability values among cells with >5% probability is 19% [5-94].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9991 Parking Lots and Parking Garages 16 13 15 13 94 73 27 0 30
4215 Equipment Rental (With Operator) 15 9 14 9 93 93 7.1 0 30
8324 Firefighting Services 43 39 39 36 91 10 18 72 7.2
9942 Welding 19 17 17 15 89 47 24 29 40
6352 Paint and Body Repair Shops 52 35 46 30 88 89 11 0 11

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2619 Other Household Furniture Industries 13 12 2 2 15 50 0 50 11 32
2951 Primary Production of Aluminum Industry 19 16 7 6 37 14 57 29 6 40
8263 Education Administration 19 16 1 1 5.3 0 100 0 5.4 40
8162 Social Service Administration 20 18 1 1 5 0 100 0 5.1 40
3511 Clay Products Industry (From Domestic Clay) 17 15 7 7 41 43 14 43 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Sulphur dioxide

A colorless, nonflammable gas with a pungent odor. It can be manufactured by the combustion of sulphur, the roasting of sulphides or the calcining of sulphates. It is an intermediate in the production of sulphuric acid and is used as a bleaching agent in various industries. However, most exposures occur when the gas is released as an unwanted by-product of fuel-burning operations or in the smelting of sulphide ores.


In the current CANJEM database, 1204 jobs are exposed at low concentration, 129 at medium, and 21 at high, for a total of 4.3 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 180 cells have a non null probability of exposure, with 78 lower than 5% and 102 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5-94].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9591 PHOTOGRAPHIC PROCESSING AND FINISHING OCCUPATIONS 18 17 17 16 94 65 35 0 6
6111 FIRE-FIGHTING OCCUPATIONS 63 57 54 51 86 100 0 0 6
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 12 11 67 83 17 0 40
8787 ROOFING, WATERPROOFING AND RELATED OCCUPATIONS 43 36 28 22 65 89 11 0 30
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 25 20 62 84 16 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
6125 FOOD AND BEVERAGE SERVING OCCUPATIONS 590 400 1 1 0.17 0 0 100 8.4 24
8149 METAL PROCESSING AND RELATED OCCUPATIONS, N.E.C. 15 13 1 1 6.7 0 100 0 5 40
8261 TEXTILE FIBRE PREPARING OCCUPATIONS 17 16 1 1 5.9 0 100 0 5 40
8570 FOREMEN: FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 10 9 1 1 10 0 100 0 5 40
8575 CUTTING AND FINISHING OCCUPATIONS, RUBBER, PLASTIC AND RELATED PRODUCTS 12 11 1 1 8.3 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 230 cells have a non null probability of exposure, with 94 lower than 5% and 136 greater than 5%. The median and range of probability values among cells with >5% probability is 10% [5-88].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8324 Firefighting Services 43 39 38 35 88 100 0 0 5.5
4235 Roof Shingling 40 30 24 19 60 88 12 0 30
9931 Photographers 30 27 18 15 60 78 22 0 6
2911 Ferro-alloys Industry 11 10 6 6 55 100 0 0 40
2912 Steel Foundries 91 63 47 38 52 89 11 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9221 Taverns, Bars and Night Clubs 190 150 1 1 0.52 0 0 100 8.4 24
4921 Gas Distribution Systems Industry 41 30 3 1 7.3 0 100 0 7.5 40
2499 Other Clothing and Apparel Industries n.e.c. 160 130 1 1 0.61 0 100 0 5 40
2951 Primary Production of Aluminum Industry 19 16 5 4 26 20 80 0 5 40
2961 Aluminum Rolling, Casting and Extruding Industry 26 25 3 3 12 33 33 33 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Chlorine

This gas has a distinctive, irritating odor and a yellowish-green color. It is mainly produced commercially by electrolysis of brine. Chlorine has been used for the production of bleaching powders, the treatment of water supplies and refuse and for chlorination in swimming pools. Exposure to chlorine may also occur when hypochlorites are used as bleaches and cleaning agents.


In the current CANJEM database, 89 jobs are exposed at low concentration, 89 at medium, and 9 at high, for a total of 0.59 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 52 cells have a non null probability of exposure, with 38 lower than 5% and 14 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5-82].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9535 WATER AND SANITATION UTILITIES EQUIPMENT OPERATING OCCUPATIONS 11 10 9 8 82 33 56 11 21
6111 FIRE-FIGHTING OCCUPATIONS 63 57 49 46 78 29 69 2 4
6161 LAUNDERING OCCUPATIONS 26 26 12 12 46 33 67 0 40
8258 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, PULP AND PAPERMAKING 13 13 4 4 31 75 25 0 40
8260 FOREMAN, TEXTILE PROCESSING OCCUPATION S 19 18 4 4 21 0 100 0 4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8179 CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING OCCUPATIONS, N.E.C. 21 19 1 1 4.8 0 0 100 25 40
8160 FOREMEN: CHEMICALS, PETROLEUM, RUBBER, PLASTICS AND RELATED MATERIALS PROCESSING OCCUPATIONS 26 22 2 2 7.7 50 0 50 13 22
6163 DRY-CLEANING OCCUPATIONS 21 18 1 1 4.8 0 100 0 5 40
7198 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK: FARMING, HORTICULTURAL AND ANIMAL HUSBANDRY 37 35 1 1 2.7 0 100 0 5 40
6161 LAUNDERING OCCUPATIONS 26 26 12 12 46 33 67 0 3 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 46 cells have a non null probability of exposure, with 27 lower than 5% and 19 greater than 5%. The median and range of probability values among cells with >5% probability is 9.1% [5.2-84].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8324 Firefighting Services 43 39 36 33 84 36 64 0 4
4931 Water Systems Industry 15 11 9 6 60 44 56 0 20
3761 Soap and Cleaning Compounds Industry 16 16 4 4 25 25 25 50 2.5
1992 Contract Textile Dyeing and Finishing Industry 65 48 15 11 23 6.7 93 0 4
2711 Pulp Industry 90 77 19 14 21 68 26 5.3 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 1 1 1.2 0 0 100 25 40
1631 Plastic Film and Sheeting Industry 26 20 2 1 7.7 0 50 50 13 22
3711 Industrial Inorganic Chemical Industries n.e.c. 58 42 3 3 5.2 0 67 33 5 40
8611 General Hospitals 750 480 3 3 0.4 0 100 0 5 40
8642 Child Welfare Services 19 14 1 1 5.3 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Ammonia

A by-product of coal distillation and is also produced by passing nitrogen, hydrogen and a catalyst through an electric arc. It is an important source of various nitrogen containing compounds. An enormous quantity of ammonia is used in the production of fertilizers. As a gas it has been used in refrigeration and in nitriding, bright annealing, and for sintering metals. As an aqueous solution (NH4OH), it has been used in the textile and pharmaceutical industries, in medicine, in trade sale paints, in fire extinguishers, and in consumer cleaning products.


In the current CANJEM database, 1309 jobs are exposed at low concentration, 425 at medium, and 50 at high, for a total of 5.6 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 187 cells have a non null probability of exposure, with 93 lower than 5% and 94 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-89].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9591 PHOTOGRAPHIC PROCESSING AND FINISHING OCCUPATIONS 18 17 16 15 89 56 25 19 6.8
6111 FIRE-FIGHTING OCCUPATIONS 63 57 50 47 79 18 82 0 5
8587 WATCH AND CLOCK REPAIRMEN 24 13 19 11 79 21 79 0 5
6133 LODGING CLEANERS, EXCEPT PRIVATE HOUSEHOLD 47 42 34 30 72 97 2.9 0 3.5
6143 BARBERS, HAIRDRESSERS AND RELATED OCCUPATIONS 110 77 75 54 69 40 60 0 8

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8179 CHEMICALS, PETROLEUM, RUBBER, PLASTIC AND RELATED MATERIALS PROCESSING OCCUPATIONS, N.E.C. 21 19 1 1 4.8 0 0 100 25 40
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 3 3 7.9 33 33 33 4.4 14
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 1 1 3.6 0 100 0 4.4 35
8566 INSPECTING, GRADING AND SAMPLING OCCUPATIONS: FABRICATING, ASSEMBLING AND REPAIRING, TEXTILE, FUR AND LEATHER PRODUCTS 22 17 3 2 14 33 67 0 4.4 35
8278 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, TEXTILE PROCESSING 27 26 1 1 3.7 0 100 0 3.1 25

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 253 cells have a non null probability of exposure, with 109 lower than 5% and 144 greater than 5%. The median and range of probability values among cells with >5% probability is 9.1% [5-95].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9713 Combination Barber and Beauty Shops 21 13 20 12 95 50 50 0 18
9712 Beauty Shops 51 36 46 32 90 39 61 0 18
8324 Firefighting Services 43 39 38 35 88 26 74 0 4.5
119 NA 80 73 67 61 84 99 1.5 0 15
9931 Photographers 30 27 18 15 60 33 28 39 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3729 Other Agricultural Chemical Industries 10 7 2 1 20 0 0 100 13 21
3052 Wire and Wire Rope Industry 21 16 1 1 4.8 0 0 100 8.4 14
2999 Other Rolled, Cast and Extruded Non-Ferrous Metal Products Industries 19 14 1 1 5.3 0 100 0 5 40
3352 Electronic Parts and Components Industry 57 41 1 1 1.8 0 100 0 5 40
1711 Leather Tanneries 25 23 6 6 24 17 50 33 4.4 35

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Chlorine dioxide

An explosive green gas or red liquid with a characteristic pungent odor. Since it is very unstable, it must be made on site just before use from chlorine and sodium chlorite. It has been employed as a bleaching agent for wood pulp, textiles, fats, oils and flour, in the treatment of municipal water supplies and swimming pools, in the control of micro-organisms and in a variety of chemical processes.


In the current CANJEM database, 42 jobs are exposed at low concentration, 23 at medium, and 1 at high, for a total of 0.21 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 29 cells have a non null probability of exposure, with 23 lower than 5% and 6 greater than 5%. The median and range of probability values among cells with >5% probability is 18% [9.1-31].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8258 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, PULP AND PAPERMAKING 13 13 4 4 31 75 25 0 40
8275 TEXTILE FINISHING AND CALENDERING OCCUPATIONS 13 13 3 3 23 67 33 0 5
8260 FOREMAN, TEXTILE PROCESSING OCCUPATION S 19 18 4 4 21 0 75 25 5
4159 MATERIAL RECORDING, SCHEDULING AND DISTRIBUTING OCCUPATIONS, N.E.C. 14 12 2 1 14 100 0 0 40
6161 LAUNDERING OCCUPATIONS 26 26 3 3 12 0 100 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8260 FOREMAN, TEXTILE PROCESSING OCCUPATION S 19 18 4 4 21 0 75 25 1.9 5
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 3 2 0.96 100 0 0 1.2 48
8589 OTHER MECHANICS AND REPAIRMEN, N.E.C. 87 71 1 1 1.1 100 0 0 1.2 50
8799 OTHER CONSTRUCTION TRADES OCCUPATIONS, N.E.C. 290 240 1 1 0.34 100 0 0 1.2 50
9315 MATERIAL HANDLING EQUIPMENT OPERATORS, N.E.C. 92 88 2 2 2.2 100 0 0 1.2 50

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 22 cells have a non null probability of exposure, with 12 lower than 5% and 10 greater than 5%. The median and range of probability values among cells with >5% probability is 8.7% [5.3-20].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
1992 Contract Textile Dyeing and Finishing Industry 65 48 13 11 20 23 77 0 5
2711 Pulp Industry 90 77 17 13 19 76 24 0 40
5611 Iron and Steel Primary Forms and Structural Shapes, Wholesale 16 10 3 1 19 100 0 0 0.5
2792 Stationery Paper Products Industry 17 13 2 2 12 100 0 0 11
2719 Other Paper Industries 28 20 3 1 11 67 33 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8642 Child Welfare Services 19 14 1 1 5.3 0 100 0 5 40
1999 Other Textile Products Industries n.e.c. 44 41 1 1 2.3 0 100 0 4 40
2711 Pulp Industry 90 77 17 13 19 76 24 0 1.2 40
2712 Newsprint Industry 16 14 1 1 6.2 100 0 0 1 40
4931 Water Systems Industry 15 11 1 1 6.7 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Ozone

A bluish gas with a slightly pungent odor. It is generated from oxygen on exposure to ultraviolet radiation and in the vicinity of electrical sources. It is a powerful oxidizer capable of breaking down most organic compounds. The potential sources of exposure to ozone in industry are leakages from ozone-using processes, high voltage electrical equipment, electric arc welding, electric furnaces, photocopying machines, and in the bleaching of textiles, paper pulp, starch and sugar.


In the current CANJEM database, 1981 jobs are exposed at low concentration, 97 at medium, and 2 at high, for a total of 6.6 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 196 cells have a non null probability of exposure, with 70 lower than 5% and 126 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5.3-66].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 200 130 66 81 19 0 30
9515 PHOTOENGRAVING AND RELATED OCCUPATIONS 13 9 8 7 62 100 0 0 5
9111 AIR PILOTS, FLIGHT OFFICERS AND FLIGHT ENGINEERS 31 21 13 7 42 100 0 0 20
4111 SECRETARIES AND STENOGRAPHERS 880 420 320 210 36 100 0.31 0 2
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 10 10 36 100 0 0 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8161 MIXING AND BLENDING OCCUPATIONS, CHEMICALS AND RELATED MATERIALS 60 48 1 1 1.7 0 100 0 3.8 30
8736 INSPECTING AND TESTING OCCUPATIONS: ELECTRICAL POWER, LIGHTING AND WIRE COMMUNICATIONS EQUIPMENT ERECTING, INSTALLING AND REPAIRING 11 11 1 1 9.1 0 0 100 3.1 5
8513 MOTOR VEHICLE FABRICATING AND ASSEMBLING OCCUPATIONS, N.E.C. 12 12 2 2 17 50 50 0 2 18
8534 ELECTRONIC EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 33 28 1 1 3 100 0 0 1.2 50
8786 INSULATING OCCUPATIONS, CONSTRUCTION 23 21 1 1 4.3 100 0 0 1.2 48

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 335 cells have a non null probability of exposure, with 100 lower than 5% and 235 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-57].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
7793 Collection Agencies 14 11 8 5 57 100 0 0 1
3021 Metal Tanks (Heavy Gauge) Industry 13 9 7 5 54 86 14 0 30
9942 Welding 19 17 10 9 53 80 20 0 20
9611 Motion Picture and Video Production 20 17 9 7 45 100 0 0 2
8668 Offices of Denturists 18 13 8 6 44 100 0 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
1041 Fluid Milk Industry 53 51 1 1 1.9 0 100 0 3.8 30
4572 Interurban and Rural Transit Systems Industry 58 51 2 2 3.4 50 50 0 2.4 35
3799 Other Chemical Products Industries n.e.c. 140 130 2 2 1.4 50 50 0 2.3 30
3712 Industrial Organic Chemical Industries n.e.c. 23 18 2 2 8.7 50 50 0 1.9 16
3041 Custom Coating of Metal Products Industry 33 23 3 2 9.1 67 33 0 1.5 60

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Metal oxide fumes

Any oxidized metal fumes formed during high temperature treatment of metals in industrial operations such as welding, casting, smelting, etc. Exposure to metal oxide fumes was also coded when metallic compounds (e.g. thermal decomposition of paints containing inorganic pigments during welding operations) are vaporized.


In the current CANJEM database, 1158 jobs are exposed at low concentration, 766 at medium, and 287 at high, for a total of 7 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 168 cells have a non null probability of exposure, with 63 lower than 5% and 105 greater than 5%. The median and range of probability values among cells with >5% probability is 20% [5-100].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 18 16 100 5.6 17 78 40
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 37 29 92 8.1 41 51 40
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 270 180 87 14 41 46 40
8537 RADIO AND TELEVISION REPAIRMEN 25 17 21 14 84 52 48 0 5
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 42 41 74 7.1 62 31 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 18 16 100 5.6 17 78 25 40
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 6 6 55 17 33 50 15 40
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 37 29 92 8.1 41 51 7.5 40
9311 HOISTING OCCUPATIONS, N.E.C. 80 59 34 26 42 38 18 44 5.9 40
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 42 41 74 7.1 62 31 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 255 cells have a non null probability of exposure, with 88 lower than 5% and 167 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5-85].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3021 Metal Tanks (Heavy Gauge) Industry 13 9 11 7 85 55 36 9.1 40
2911 Ferro-alloys Industry 11 10 8 7 73 38 25 38 40
3241 Truck and Bus Body Industry 30 21 22 16 73 55 27 18 40
4241 Plumbing 130 92 88 65 69 58 41 1.1 5
2999 Other Rolled, Cast and Extruded Non-Ferrous Metal Products Industries 19 14 13 11 68 23 38 38 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
1041 Fluid Milk Industry 53 51 1 1 1.9 0 0 100 25 40
2951 Primary Production of Aluminum Industry 19 16 7 6 37 0 29 71 25 40
3332 Electric Lamp and Shade Industry (Except Bulb and Tube) 26 23 1 1 3.8 0 0 100 25 40
3712 Industrial Organic Chemical Industries n.e.c. 23 18 1 1 4.3 0 0 100 25 40
814 Foreign Affairs and International Assistance 16 13 1 1 6.2 0 0 100 25 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Aluminium fumes

Fumes produced during high temperature processes involving aluminium (Al)-containing alloys or ores. The major use of aluminium has been structural, in the building, aircraft, and automotive industries; it has also been used in housewares, and in containers and packaging. Exposure to aluminium fumes has generally occurred during welding, casting or smelting and refining operations.


In the current CANJEM database, 126 jobs are exposed at low concentration, 85 at medium, and 26 at high, for a total of 0.75 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 66 cells have a non null probability of exposure, with 43 lower than 5% and 23 greater than 5%. The median and range of probability values among cells with >5% probability is 10% [5-24].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8529 OTHER FABRICATING AND ASSEMBLING OCCUPATIONS, METAL PRODUCTS, N.E.C. 55 49 13 10 24 46 54 0 10
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 9 7 22 0 67 33 5.4
8330 FOREMEN, METAL SHAPING AND FORMING OCCUPATIONS, EXCEPT MACHINING 24 23 4 4 17 25 75 0 5.4
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 47 35 15 32 51 17 5.4
8515 AIRCRAFT FABRICATING AND ASSEMBLING OCCUPATIONS, N.E.C. 75 66 11 11 15 55 45 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 1 1 5.6 0 0 100 25 40
8149 METAL PROCESSING AND RELATED OCCUPATIONS, N.E.C. 15 13 2 2 13 0 50 50 13 22
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 8 8 14 0 62 38 5.3 40
8513 MOTOR VEHICLE FABRICATING AND ASSEMBLING OCCUPATIONS, N.E.C. 12 12 1 1 8.3 0 100 0 5 40
2142 CHEMICAL ENGINEERS 30 12 1 1 3.3 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 81 cells have a non null probability of exposure, with 50 lower than 5% and 31 greater than 5%. The median and range of probability values among cells with >5% probability is 8.3% [5-37].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
2951 Primary Production of Aluminum Industry 19 16 7 6 37 0 29 71 40
3241 Truck and Bus Body Industry 30 21 9 5 30 67 22 11 20
2961 Aluminum Rolling, Casting and Extruding Industry 26 25 7 7 27 0 57 43 40
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 14 12 16 29 7.1 64 40
2999 Other Rolled, Cast and Extruded Non-Ferrous Metal Products Industries 19 14 3 3 16 0 100 0 5.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2951 Primary Production of Aluminum Industry 19 16 7 6 37 0 29 71 25 40
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 14 12 16 29 7.1 64 25 40
8521 Post-Secondary Non-University Education 190 160 2 1 1.1 0 50 50 13 23
2961 Aluminum Rolling, Casting and Extruding Industry 26 25 7 7 27 0 57 43 5 40
4572 Interurban and Rural Transit Systems Industry 58 51 1 1 1.7 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Calcium oxide fumes

Fumes generated during high temperature processes involving calcium oxide (CaO). Exposure occurs during steel making where slag forming materials such as calcium oxide and dolomite are added to the charge as fluxing agents and in certain welding operations because carbon steel electrode coverings may contain calcium oxide.


In the current CANJEM database, 262 jobs are exposed at low concentration, 184 at medium, and 85 at high, for a total of 1.7 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 58 cells have a non null probability of exposure, with 25 lower than 5% and 33 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-68].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 27 23 68 41 41 19 20
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 11 9 61 9.1 18 73 20
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 180 120 59 48 26 26 20
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 28 28 49 57 25 18 20
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 5 5 45 0 100 0 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 11 9 61 9.1 18 73 12 20
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 1 1 2.6 0 0 100 12 20
9318 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, MATERIAL HANDLING, N.E.C. 610 530 2 2 0.33 50 0 50 6.5 20
2144 ELECTRICAL ENGINEERS 64 31 1 1 1.6 0 100 0 2.5 20
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 5 5 45 0 100 0 2.5 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 128 cells have a non null probability of exposure, with 64 lower than 5% and 64 greater than 5%. The median and range of probability values among cells with >5% probability is 9.1% [5-58].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9942 Welding 19 17 11 10 58 27 45 27 20
2941 Iron Foundries 50 45 28 27 56 46 39 14 20
2912 Steel Foundries 91 63 40 31 44 50 32 18 22
3023 Pre-Engineered Metal Buildings Industry (Except Portable) 36 32 14 14 39 36 36 29 20
2911 Ferro-alloys Industry 11 10 4 3 36 0 25 75 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
814 Foreign Affairs and International Assistance 16 13 1 1 6.2 0 0 100 25 40
4911 Electric Power Systems Industry 180 130 1 1 0.56 0 0 100 13 30
3712 Industrial Organic Chemical Industries n.e.c. 23 18 1 1 4.3 0 0 100 12 20
2911 Ferro-alloys Industry 11 10 4 3 36 0 25 75 9.4 20
3711 Industrial Inorganic Chemical Industries n.e.c. 58 42 4 4 6.9 25 25 50 7.2 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Titanium fumes

Fumes generated during high temperature processes involving titanium (Ti) alloys or titanium dioxide. Occupational exposure to these fumes is coded mainly to workers involved in welding operations. Some electrode coverings contain titanium dioxide as a component giving rise to titanium dioxide fumes during welding. Potential exposures could also occur during welding operations in aircraft engine manufacturing facilities using titanium-based alloys.


In the current CANJEM database, 22 jobs are exposed at low concentration, 0 at medium, and 0 at high, for a total of 0.069 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 6 cells have a non null probability of exposure, with 6 lower than 5% and 0 greater than 5%. The median and range of probability values among cells with >5% probability is NA% [Inf–Inf].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8581 MOTOR-VEHICLE MECHANICS AND REPAIRMEN 380 240 15 13 4 100 0 0 5.4
2791 COMMUNITY COLLEGE AND VOCATIONAL SCHOOL TEACHERS 80 69 3 2 3.8 100 0 0 5.4
8793 STRUCTURAL-METAL ERECTORS 71 63 1 1 1.4 100 0 0 40
8584 INDUSTRIAL, FARM AND CONSTRUCTION MACHINERY MECHANICS AND REPAIRMEN 170 130 1 1 0.6 100 0 0 5.4
8799 OTHER CONSTRUCTION TRADES OCCUPATIONS, N.E.C. 290 240 1 1 0.34 100 0 0 5.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8793 STRUCTURAL-METAL ERECTORS 71 63 1 1 1.4 100 0 0 1 40
2791 COMMUNITY COLLEGE AND VOCATIONAL SCHOOL TEACHERS 80 69 3 2 3.8 100 0 0 0.14 5.4
5130 SUPERVISORS: SALES OCCUPATIONS, COMMODITIES 630 540 1 1 0.16 100 0 0 0.14 5.4
8581 MOTOR-VEHICLE MECHANICS AND REPAIRMEN 380 240 15 13 4 100 0 0 0.14 5.4
8584 INDUSTRIAL, FARM AND CONSTRUCTION MACHINERY MECHANICS AND REPAIRMEN 170 130 1 1 0.6 100 0 0 0.14 5.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 7 cells have a non null probability of exposure, with 6 lower than 5% and 1 greater than 5%. The median and range of probability values among cells with >5% probability is 9.6% [9.6-9.6].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
6352 Paint and Body Repair Shops 52 35 5 4 9.6 100 0 0 5.4
1631 Plastic Film and Sheeting Industry 26 20 1 1 3.8 100 0 0 5.4
6351 Garages (General Repairs) 260 200 6 6 2.3 100 0 0 5.4
6311 Automobile (New) Dealers 160 120 3 3 1.9 100 0 0 5.4
8521 Post-Secondary Non-University Education 190 160 3 2 1.6 100 0 0 5.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
1631 Plastic Film and Sheeting Industry 26 20 1 1 3.8 100 0 0 0.14 5.4
4541 Freight and Passenger Water Transport Industry 140 120 1 1 0.69 100 0 0 0.14 5.4
6311 Automobile (New) Dealers 160 120 3 3 1.9 100 0 0 0.14 5.4
6351 Garages (General Repairs) 260 200 6 6 2.3 100 0 0 0.14 5.4
6352 Paint and Body Repair Shops 52 35 5 4 9.6 100 0 0 0.14 5.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Chromium fumes

Fumes generated during high temperature processes involving chromium (Cr)-containing alloys or ores. Exposure can occur during foundry work, welding operations, flame cutting, etc. High exposure has been coded to stainless steel or high chromium (Cr) alloy steel welders, especially to those using manual metal arc welding techniques.


In the current CANJEM database, 251 jobs are exposed at low concentration, 150 at medium, and 4 at high, for a total of 1.3 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 73 cells have a non null probability of exposure, with 44 lower than 5% and 29 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-35].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 14 11 35 79 21 0 5.4
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 110 76 34 39 59 1.9 5.4
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 6 5 33 50 50 0 36
8333 SHEET-METAL WORKERS 88 65 25 20 28 72 24 4 5.4
8395 PATTERNMAKERS AND MOULDMAKERS, N.E.C. 11 11 3 3 27 100 0 0 10

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
5133 COMMERCIAL TRAVELLERS 410 290 2 2 0.49 50 0 50 13 22
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 6 5 33 50 50 0 2.7 36
8331 FORGING OCCUPATIONS 47 39 2 2 4.3 50 50 0 1.6 23
8529 OTHER FABRICATING AND ASSEMBLING OCCUPATIONS, METAL PRODUCTS, N.E.C. 55 49 8 7 15 38 62 0 1.6 28
4150 SUPERVISORS: MATERIAL RECORDING, SCHEDULING AND DISTRIBUTING OCCUPATIONS 85 73 1 1 1.2 100 0 0 1.5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 116 cells have a non null probability of exposure, with 53 lower than 5% and 63 greater than 5%. The median and range of probability values among cells with >5% probability is 8.3% [5-39].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8668 Offices of Denturists 18 13 7 5 39 0 100 0 1
2692 Hotel, Restaurant and Institutional Furniture and Fixture Industry 16 14 6 5 38 83 17 0 10
3021 Metal Tanks (Heavy Gauge) Industry 13 9 4 3 31 50 50 0 30
2912 Steel Foundries 91 63 26 22 29 65 35 0 40
2911 Ferro-alloys Industry 11 10 3 3 27 100 0 0 20

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
5941 Toys, Novelties and Fireworks, Wholesale 14 11 1 1 7.1 0 0 100 25 40
3712 Industrial Organic Chemical Industries n.e.c. 23 18 1 1 4.3 0 100 0 5 40
3091 Metal Plumbing Fixtures and Fittings Industry 30 27 2 2 6.7 0 100 0 2.6 23
4511 Scheduled Air Transport Industry 170 120 2 2 1.2 0 100 0 2.6 20
3194 Turbine and Mechanical Power Transmission Equipment Industry 26 19 5 5 19 40 40 20 2 16

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Manganese fumes

Fumes generated during high temperature processes involving manganese (Mn) or manganese-containing alloys. Since all commercial steel contains some manganese which has been introduced in the process of deoxidizing and desulphurizing and to build the strength of the steel, almost all welders of mild and stainless steel have been coded for manganese fume exposures.


In the current CANJEM database, 815 jobs are exposed at low concentration, 152 at medium, and 1 at high, for a total of 3.1 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 126 cells have a non null probability of exposure, with 70 lower than 5% and 56 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5.3-78].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 240 160 78 59 41 0 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 11 9 61 55 45 0 40
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 27 27 47 56 44 0 5.4
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 12 12 43 83 17 0 40
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 14 11 35 86 14 0 38

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 2 2 5.3 50 50 0 2.6 23
9313 LONGSHORE WORKERS, STEVEDORES AND FREIGHT HANDLERS 110 100 1 1 0.93 100 0 0 1.5 60
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 11 9 61 55 45 0 1.2 40
8315 MACHINE-TOOL OPERATING OCCUPATIONS 100 82 6 3 6 100 0 0 1.2 48
4197 GENERAL OFFICE CLERKS 640 500 1 1 0.16 100 0 0 1.1 45

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 187 cells have a non null probability of exposure, with 81 lower than 5% and 106 greater than 5%. The median and range of probability values among cells with >5% probability is 10% [5-64].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
2911 Ferro-alloys Industry 11 10 7 6 64 43 43 14 40
3021 Metal Tanks (Heavy Gauge) Industry 13 9 8 5 62 88 12 0 40
9942 Welding 19 17 11 10 58 55 45 0 40
2912 Steel Foundries 91 63 50 37 55 64 36 0 40
3023 Pre-Engineered Metal Buildings Industry (Except Portable) 36 32 19 18 53 95 5.3 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2971 Copper and Copper Alloy Rolling, Casting and Extruding Industry 45 37 1 1 2.2 0 100 0 5 40
3191 Compressor, Pump and Industrial Fan Industry 18 14 1 1 5.6 0 100 0 5 40
3259 Other Motor Vehicle Accessories, Parts and Assemblies Industries 10 9 1 1 10 0 100 0 5 40
814 Foreign Affairs and International Assistance 16 13 1 1 6.2 0 100 0 5 40
3042 Metal Closure and Container Industry 89 74 11 10 12 45 55 0 3.8 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Iron fumes

Fumes generated during high temperature processes involving iron (Fe) or iron-containing alloys. Exposure to iron fumes occurred during smelting, foundry work, welding and flame cutting operations.


In the current CANJEM database, 639 jobs are exposed at low concentration, 380 at medium, and 160 at high, for a total of 3.7 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 125 cells have a non null probability of exposure, with 63 lower than 5% and 62 greater than 5%. The median and range of probability values among cells with >5% probability is 14% [5.3-80].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 250 160 80 28 36 36 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 14 12 78 7.1 21 71 40
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 30 25 75 20 50 30 40
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 6 6 55 17 67 17 40
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 31 31 54 19 55 26 30

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 14 12 78 7.1 21 71 25 40
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 2 2 5.3 50 0 50 13 23
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 6 6 55 17 67 17 5 40
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 30 25 75 20 50 30 5 40
9311 HOISTING OCCUPATIONS, N.E.C. 80 59 27 22 34 33 26 41 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 198 cells have a non null probability of exposure, with 85 lower than 5% and 113 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-69].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3021 Metal Tanks (Heavy Gauge) Industry 13 9 9 6 69 56 33 11 40
2911 Ferro-alloys Industry 11 10 7 6 64 29 14 57 40
2912 Steel Foundries 91 63 57 42 63 33 32 35 40
3241 Truck and Bus Body Industry 30 21 19 14 63 47 37 16 40
9942 Welding 19 17 12 11 63 25 33 42 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
1041 Fluid Milk Industry 53 51 1 1 1.9 0 0 100 25 40
3712 Industrial Organic Chemical Industries n.e.c. 23 18 1 1 4.3 0 0 100 25 40
814 Foreign Affairs and International Assistance 16 13 1 1 6.2 0 0 100 25 40
8263 Education Administration 19 16 1 1 5.3 0 0 100 25 40
3259 Other Motor Vehicle Accessories, Parts and Assemblies Industries 10 9 2 2 20 50 0 50 13 23

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Nickel fumes

Fumes generated during high temperature processes involving nickel (Ni)-containing alloys or ores. The use of high alloyed steels containing a higher proportion of nickel has been increasing in the chemical and aircraft industries resulting in increased exposure to nickel containing aerosols. Exposure occurred mainly during smelting, casting, welding and flame cutting operations.


In the current CANJEM database, 247 jobs are exposed at low concentration, 140 at medium, and 2 at high, for a total of 1.2 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 70 cells have a non null probability of exposure, with 40 lower than 5% and 30 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-35].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 14 11 35 86 14 0 5.4
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 110 78 35 44 55 0.92 5.4
8333 SHEET-METAL WORKERS 88 65 23 18 26 74 22 4.3 5.4
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 13 13 23 92 7.7 0 25
3157 DENTURISTS, DENTAL HYGIENISTS, 43 26 8 5 19 0 100 0 1

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8529 OTHER FABRICATING AND ASSEMBLING OCCUPATIONS, METAL PRODUCTS, N.E.C. 55 49 8 6 15 25 75 0 1.5 40
8331 FORGING OCCUPATIONS 47 39 2 2 4.3 50 50 0 1.1 23
4150 SUPERVISORS: MATERIAL RECORDING, SCHEDULING AND DISTRIBUTING OCCUPATIONS 85 73 1 1 1.2 100 0 0 1 40
4155 STOCK CLERKS AND RELATED OCCUPATIONS 270 230 3 3 1.1 67 33 0 1 10
6191 JANITORS, CHARWORKERS AND CLEANERS 620 530 1 1 0.16 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 111 cells have a non null probability of exposure, with 52 lower than 5% and 59 greater than 5%. The median and range of probability values among cells with >5% probability is 8.8% [5-39].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8668 Offices of Denturists 18 13 7 5 39 0 100 0 1
2692 Hotel, Restaurant and Institutional Furniture and Fixture Industry 16 14 5 4 31 80 20 0 10
3021 Metal Tanks (Heavy Gauge) Industry 13 9 4 3 31 50 50 0 30
9942 Welding 19 17 5 5 26 40 60 0 28
2912 Steel Foundries 91 63 23 21 25 78 22 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3712 Industrial Organic Chemical Industries n.e.c. 23 18 1 1 4.3 0 100 0 5 40
4511 Scheduled Air Transport Industry 170 120 2 2 1.2 0 100 0 2.6 20
4119 Other Industrial Construction 44 39 2 2 4.5 50 50 0 2.2 20
3194 Turbine and Mechanical Power Transmission Equipment Industry 26 19 5 5 19 40 40 20 2 16
3071 Heating Equipment Industry 28 27 2 2 7.1 50 50 0 1.9 16

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Copper fumes

Fumes generated during high temperature processes involving copper (Cu), copper-containing alloys or ores. Exposure to copper fumes generally occurs during welding, casting, or smelting and refining operations.


In the current CANJEM database, 195 jobs are exposed at low concentration, 160 at medium, and 24 at high, for a total of 1.2 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 84 cells have a non null probability of exposure, with 45 lower than 5% and 39 greater than 5%. The median and range of probability values among cells with >5% probability is 9.1% [5-39].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8591 JEWELLERY AND SILVERWARE FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS 46 37 18 13 39 33 56 11 10
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 14 11 35 7.1 64 29 36
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 5 5 28 40 0 60 40
8135 METAL ROLLING OCCUPATIONS 11 11 3 3 27 100 0 0 40
3157 DENTURISTS, DENTAL HYGIENISTS, 43 26 8 5 19 50 50 0 1

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 5 5 28 40 0 60 25 40
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 1 1 9.1 0 100 0 6.2 50
9133 CONDUCTORS AND BRAKE WORKERS, RAILWAY 42 34 1 1 2.4 0 100 0 6.2 50
9318 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, MATERIAL HANDLING, N.E.C. 610 530 1 1 0.16 0 100 0 5 40
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 14 11 35 7.1 64 29 4.5 36

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 108 cells have a non null probability of exposure, with 55 lower than 5% and 53 greater than 5%. The median and range of probability values among cells with >5% probability is 9.1% [5-47].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
2971 Copper and Copper Alloy Rolling, Casting and Extruding Industry 45 37 21 19 47 33 48 19 40
8668 Offices of Denturists 18 13 7 5 39 57 43 0 1
2999 Other Rolled, Cast and Extruded Non-Ferrous Metal Products Industries 19 14 7 3 37 29 71 0 8
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 23 18 27 26 57 17 40
3921 Jewellery and Silverware Industry 95 77 23 17 24 52 35 13 15

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3194 Turbine and Mechanical Power Transmission Equipment Industry 26 19 2 2 7.7 50 0 50 13 23
3111 Agricultural Implement Industry 16 14 1 1 6.2 0 100 0 5 40
3259 Other Motor Vehicle Accessories, Parts and Assemblies Industries 10 9 1 1 10 0 100 0 5 40
3712 Industrial Organic Chemical Industries n.e.c. 23 18 1 1 4.3 0 100 0 5 40
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 23 18 27 26 57 17 3.3 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Zinc fumes

Fumes generated during high temperature processes involving zinc (Zn)-containing alloys or ores. Exposure can occur during foundry and galvanizing operations, brass, bronze and babbitt making and during welding of zinc-containing alloys such as those used in roofing material, pipelines, appliances, and other galvanized materials.


In the current CANJEM database, 356 jobs are exposed at low concentration, 111 at medium, and 33 at high, for a total of 1.6 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 84 cells have a non null probability of exposure, with 43 lower than 5% and 41 greater than 5%. The median and range of probability values among cells with >5% probability is 9.1% [5.1-44].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8537 RADIO AND TELEVISION REPAIRMEN 25 17 11 9 44 100 0 0 10
8791 PIPEFITTING, PLUMBING AND RELATED OCCUPATIONS, N.E.C. 200 130 65 42 32 83 17 0 5
8333 SHEET-METAL WORKERS 88 65 27 20 31 56 37 7.4 5.4
8534 ELECTRONIC EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 33 28 10 8 30 100 0 0 35
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 84 69 27 50 32 18 5.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8513 MOTOR VEHICLE FABRICATING AND ASSEMBLING OCCUPATIONS, N.E.C. 12 12 1 1 8.3 0 0 100 25 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 2 2 11 50 0 50 13 23
8319 METAL MACHINING OCCUPATIONS, N.E.C. 21 21 1 1 4.8 0 0 100 3.4 5.4
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 9 7 22 22 56 22 2.6 21
8528 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, FABRICATING AND ASSEMBLING METAL PRODUCTS, N.E.C. 40 34 3 3 7.5 33 33 33 2.4 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 143 cells have a non null probability of exposure, with 73 lower than 5% and 70 greater than 5%. The median and range of probability values among cells with >5% probability is 8.1% [5-58].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
2999 Other Rolled, Cast and Extruded Non-Ferrous Metal Products Industries 19 14 11 6 58 45 45 9.1 8
4244 Sheet Metal and Other Duct Work 15 12 6 6 40 67 17 17 3.5
4241 Plumbing 130 92 43 29 34 91 9.3 0 5.4
9942 Welding 19 17 5 4 26 40 60 0 5.4
4236 Sheet Metal and Built-up Roofing 12 12 3 3 25 33 67 0 5.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3111 Agricultural Implement Industry 16 14 1 1 6.2 0 100 0 5 40
2941 Iron Foundries 50 45 3 3 6 33 0 67 3.4 5.4
2961 Aluminum Rolling, Casting and Extruding Industry 26 25 4 4 15 25 50 25 2.8 25
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 4 4 4.7 25 50 25 2 5.4
6593 Art Galleries and Artists’ Supply Stores 12 10 1 1 8.3 0 100 0 1.6 12

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Silver fumes

Fumes generated during high temperature processes involving silver (Ag), silver-containing alloys or ores. Exposure occurred mainly in foundry, flame cutting, welding, soldering and jewelry making occupations.


In the current CANJEM database, 96 jobs are exposed at low concentration, 74 at medium, and 4 at high, for a total of 0.55 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 43 cells have a non null probability of exposure, with 26 lower than 5% and 17 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-39].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8591 JEWELLERY AND SILVERWARE FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS 46 37 18 13 39 28 61 11 5.4
8535 ELECTRONIC AND RELATED EQUIPMENT INSTALLING AND REPAIRING OCCUPATIONS. N.E.C. 53 32 17 12 32 65 35 0 5.4
8311 TOOL-AND-DIE MAKING OCCUPATIONS 58 36 13 8 22 23 69 7.7 1
3157 DENTURISTS, DENTAL HYGIENISTS, 43 26 9 6 21 11 89 0 1
8537 RADIO AND TELEVISION REPAIRMEN 25 17 4 3 16 100 0 0 7

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
9318 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, MATERIAL HANDLING, N.E.C. 610 530 1 1 0.16 0 100 0 5 40
6115 GUARDS AND RELATED SECURITY OCCUPATIONS 390 330 2 2 0.52 50 0 50 1.8 5.4
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 1 1 5.6 100 0 0 1.5 60
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 19 18 6.1 63 37 0 1 40
8534 ELECTRONIC EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 33 28 5 5 15 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 62 cells have a non null probability of exposure, with 42 lower than 5% and 20 greater than 5%. The median and range of probability values among cells with >5% probability is 7.9% [5-44].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8668 Offices of Denturists 18 13 8 6 44 12 88 0 1
3063 Hand Tool and Implement Industry 11 9 3 2 27 33 67 0 1
6223 Appliance, Television, Radio and Stereo Repair Shops 27 23 7 6 26 57 43 0 5.4
3921 Jewellery and Silverware Industry 95 77 19 14 20 37 53 11 5.4
6562 Watch and Jewellery Repair Shops 18 12 3 2 17 0 100 0 5.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8411 International and Other Extra-Territorial Agencies 23 17 2 1 8.7 50 50 0 2.6 23
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 6 6 7 67 17 17 1.3 40
2971 Copper and Copper Alloy Rolling, Casting and Extruding Industry 45 37 3 2 6.7 67 33 0 1 40
3321 Major Appliance Industry (Electric and Non-Electric) 77 62 2 2 2.6 100 0 0 1 40
3341 Record Player, Radio and Television Receiver Industry 44 37 1 1 2.3 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Cadmium fumes

Fumes generated during high temperature processes involving cadmium (Cd) or cadmium-containing alloys. Exposure can occur during founding, welding, flame cutting, glass manufacturing and pyrolysis of colored plastics. Exposure to cadmium fumes readily occurs in foundries using scrap metal due to the low melting point of cadmium metal (321°C).


In the current CANJEM database, 19 jobs are exposed at low concentration, 24 at medium, and 1 at high, for a total of 0.14 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 19 cells have a non null probability of exposure, with 15 lower than 5% and 4 greater than 5%. The median and range of probability values among cells with >5% probability is 8% [5-11].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8591 JEWELLERY AND SILVERWARE FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS 46 37 5 3 11 0 100 0 5.4
8311 TOOL-AND-DIE MAKING OCCUPATIONS 58 36 6 3 10 33 67 0 1
8535 ELECTRONIC AND RELATED EQUIPMENT INSTALLING AND REPAIRING OCCUPATIONS. N.E.C. 53 32 3 2 5.7 67 33 0 1.2
8523 INDUSTRIAL, FARM. CONSTRUCTION AND OTHER MECHANIZED EQUIPMENT AND MACHINERY FABRICATING AND ASSEMBLING OCCUPATIONS, N.E.C. 20 20 1 1 5 100 0 0 1
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 1 1 3.6 0 100 0 1

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 7 5 2.3 29 57 14 1 20
8581 MOTOR-VEHICLE MECHANICS AND REPAIRMEN 380 240 1 1 0.26 0 100 0 0.68 5.4
8591 JEWELLERY AND SILVERWARE FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS 46 37 5 3 11 0 100 0 0.68 5.4
8791 PIPEFITTING, PLUMBING AND RELATED OCCUPATIONS, N.E.C. 200 130 4 4 2 25 75 0 0.68 5.4
4155 STOCK CLERKS AND RELATED OCCUPATIONS 270 230 1 1 0.37 100 0 0 0.6 24

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 28 cells have a non null probability of exposure, with 23 lower than 5% and 5 greater than 5%. The median and range of probability values among cells with >5% probability is 7.4% [5.3-27].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3063 Hand Tool and Implement Industry 11 9 3 2 27 0 67 33 1
3021 Metal Tanks (Heavy Gauge) Industry 13 9 1 1 7.7 0 100 0 20
6223 Appliance, Television, Radio and Stereo Repair Shops 27 23 2 2 7.4 50 50 0 3.2
3912 Other Instruments and Related Products Industry 14 11 1 1 7.1 100 0 0 5.4
3921 Jewellery and Silverware Industry 95 77 5 3 5.3 0 100 0 5.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3021 Metal Tanks (Heavy Gauge) Industry 13 9 1 1 7.7 0 100 0 2.5 20
3321 Major Appliance Industry (Electric and Non-Electric) 77 62 1 1 1.3 100 0 0 1 40
3042 Metal Closure and Container Industry 89 74 1 1 1.1 0 100 0 0.68 5.4
3921 Jewellery and Silverware Industry 95 77 5 3 5.3 0 100 0 0.68 5.4
4241 Plumbing 130 92 3 2 2.3 0 100 0 0.68 5.4

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Tin fumes

Fumes generated during high temperature processes involving tin and tin (Sn)-containing alloys or ores. Tin melts at a relatively low temperature (232°C). It is used extensively in solder alloys. Tin fumes have been coded to workers in plumbing and pipe-fitting occupations where gas welding or torches are used, but they have not been coded to workers using electric soldering irons which operate at a much lower temperature.


In the current CANJEM database, 497 jobs are exposed at low concentration, 128 at medium, and 12 at high, for a total of 2 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 94 cells have a non null probability of exposure, with 48 lower than 5% and 46 greater than 5%. The median and range of probability values among cells with >5% probability is 8.8% [5-64].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8791 PIPEFITTING, PLUMBING AND RELATED OCCUPATIONS, N.E.C. 200 130 130 91 64 92 7.7 0 5.4
8534 ELECTRONIC EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 33 28 18 15 55 78 22 0 40
9511 TYPESETTING AND COMPOSING OCCUPATIONS 35 24 14 10 40 93 7.1 0 40
8535 ELECTRONIC AND RELATED EQUIPMENT INSTALLING AND REPAIRING OCCUPATIONS. N.E.C. 53 32 19 12 36 95 5.3 0 3.8
8537 RADIO AND TELEVISION REPAIRMEN 25 17 8 7 32 100 0 0 10

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8135 METAL ROLLING OCCUPATIONS 11 11 1 1 9.1 0 100 0 5 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 1 1 5.6 0 0 100 3.4 5.4
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 9 7 22 0 89 11 3.4 5.4
8583 RAIL TRANSPORT EQUIPMENT MECHANICS AND REPAIRMEN 58 55 3 2 5.2 0 33 67 3.4 5.4
8793 STRUCTURAL-METAL ERECTORS 71 63 1 1 1.4 0 100 0 3 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 162 cells have a non null probability of exposure, with 89 lower than 5% and 73 greater than 5%. The median and range of probability values among cells with >5% probability is 8.2% [5-68].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4241 Plumbing 130 92 87 66 68 97 3.4 0 5.4
4236 Sheet Metal and Built-up Roofing 12 12 5 5 42 60 40 0 5.4
2999 Other Rolled, Cast and Extruded Non-Ferrous Metal Products Industries 19 14 7 3 37 29 57 14 8
4244 Sheet Metal and Other Duct Work 15 12 5 5 33 60 40 0 5.4
3341 Record Player, Radio and Television Receiver Industry 44 37 13 12 30 54 46 0 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2711 Pulp Industry 90 77 1 1 1.1 0 0 100 25 40
3712 Industrial Organic Chemical Industries n.e.c. 23 18 1 1 4.3 0 100 0 5 40
4216 Asphalt Paving 15 12 1 1 6.7 0 100 0 5 40
3031 Metal Door and Window Industry 38 29 1 1 2.6 0 100 0 3 40
2959 Other Primary Smelting and Refining of Non-Ferrous Metal Industries 86 62 2 2 2.3 0 100 0 2.8 23

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Lead fumes

Fumes generated during high temperature processes involving lead (Pb), lead-containing alloys or lead-containing ores. During roasting of ores a substantial amount of lead is released into the environment. Exposure has been especially prominent in certain foundry operations, in the soldering of tin cans and radiators, in the recycling of battery plates and babbitt metal, in the manufacturing of shots and bullets, in the spraying of molten lead alloys and in the casting of type metals.


In the current CANJEM database, 861 jobs are exposed at low concentration, 303 at medium, and 19 at high, for a total of 3.7 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 150 cells have a non null probability of exposure, with 76 lower than 5% and 74 greater than 5%. The median and range of probability values among cells with >5% probability is 9.7% [5-69].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8791 PIPEFITTING, PLUMBING AND RELATED OCCUPATIONS, N.E.C. 200 130 140 98 69 88 11 0.72 5.4
8534 ELECTRONIC EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 33 28 18 15 55 94 5.6 0 40
9511 TYPESETTING AND COMPOSING OCCUPATIONS 35 24 14 10 40 71 21 7.1 40
8535 ELECTRONIC AND RELATED EQUIPMENT INSTALLING AND REPAIRING OCCUPATIONS. N.E.C. 53 32 19 12 36 95 5.3 0 3.8
9918 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, N.E.C. 59 54 20 19 34 50 50 0 10

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 1 1 5.6 0 0 100 25 40
8135 METAL ROLLING OCCUPATIONS 11 11 1 1 9.1 0 0 100 25 40
8141 METAL EXTRUDING AND DRAWING OCCUPATIONS 16 15 1 1 6.2 0 0 100 25 40
8339 METAL SHAPING AND FORMING OCCUPATIONS, EXCEPT MACHINING, N.E.C. 27 26 1 1 3.7 0 0 100 23 40
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 2 2 5.3 0 100 0 6.5 38

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 221 cells have a non null probability of exposure, with 94 lower than 5% and 127 greater than 5%. The median and range of probability values among cells with >5% probability is 8.5% [5-70].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4241 Plumbing 130 92 89 68 70 94 4.5 1.1 5.4
2999 Other Rolled, Cast and Extruded Non-Ferrous Metal Products Industries 19 14 12 8 63 17 33 50 40
4252 Automatic Sprinkler System Installation 11 7 6 5 55 83 17 0 1.1
4236 Sheet Metal and Built-up Roofing 12 12 6 6 50 67 33 0 5.4
4244 Sheet Metal and Other Duct Work 15 12 7 7 47 57 43 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2711 Pulp Industry 90 77 2 2 2.2 0 50 50 13 22
2999 Other Rolled, Cast and Extruded Non-Ferrous Metal Products Industries 19 14 12 8 63 17 33 50 11 40
4216 Asphalt Paving 15 12 1 1 6.7 0 100 0 5 40
4552 Harbour and Port Operation Industry 99 85 2 2 2 50 50 0 4 40
2951 Primary Production of Aluminum Industry 19 16 1 1 5.3 0 0 100 3.8 10

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Gas welding fumes

Any fumes generated during the joining or cutting of metals using gas welding techniques. In this process the heat of fusion is obtained from combustion of oxygen and one of several gases such as acetylene, methylacetylene-propadiene (MAPP), propane, and hydrogen. Gas welding fumes include metal fumes from base and filler metals, fumes from the fluxes and from the combustible gases used.


In the current CANJEM database, 603 jobs are exposed at low concentration, 480 at medium, and 218 at high, for a total of 4.1 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 147 cells have a non null probability of exposure, with 70 lower than 5% and 77 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5.2-62].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8583 RAIL TRANSPORT EQUIPMENT MECHANICS AND REPAIRMEN 58 55 36 35 62 67 19 14 12
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 17 16 61 29 41 29 10
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 170 110 54 6 43 51 40
8581 MOTOR-VEHICLE MECHANICS AND REPAIRMEN 380 240 180 130 49 35 46 18 5
8580 FOREMEN: MECHANICS AND REPAIRMEN, N.E.C. 77 68 37 34 48 70 24 5.4 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 2 2 18 0 100 0 5 40
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 170 110 54 6 43 51 4.7 40
8131 METAL SMELTING, CONVERTING AND REFINING FURNACEMEN 18 16 1 1 5.6 0 100 0 3.3 26
8319 METAL MACHINING OCCUPATIONS, N.E.C. 21 21 3 3 14 33 33 33 3.1 40
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 17 16 61 29 41 29 3.1 10

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 208 cells have a non null probability of exposure, with 91 lower than 5% and 117 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-69].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3021 Metal Tanks (Heavy Gauge) Industry 13 9 9 5 69 22 44 33 40
6352 Paint and Body Repair Shops 52 35 31 20 60 35 55 9.7 5
3241 Truck and Bus Body Industry 30 21 17 11 57 47 35 18 10
3023 Pre-Engineered Metal Buildings Industry (Except Portable) 36 32 20 19 56 50 40 10 19
3271 Shipbuilding and Repair Industry 180 150 73 61 40 38 33 29 30

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
1041 Fluid Milk Industry 53 51 1 1 1.9 0 0 100 25 40
3372 Electrical Switchgear and Protective Equipment Industry 49 36 1 1 2 0 0 100 25 40
3321 Major Appliance Industry (Electric and Non-Electric) 77 62 6 5 7.8 17 33 50 5.1 40
2999 Other Rolled, Cast and Extruded Non-Ferrous Metal Products Industries 19 14 1 1 5.3 0 100 0 5 40
5611 Iron and Steel Primary Forms and Structural Shapes, Wholesale 16 10 2 2 12 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Arc welding fumes

Any fumes generated during the joining or cutting of metals using arc welding techniques. In this process the heat of fusion is obtained by striking an electric arc between an electrode and the metal workpiece. The fumes coded here would include those generated from the base metal, from the electrodes and from electrode coverings (which may contain inorganic and organic fluxing compounds) and/or their decomposition products.


In the current CANJEM database, 750 jobs are exposed at low concentration, 438 at medium, and 223 at high, for a total of 4.5 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 144 cells have a non null probability of exposure, with 66 lower than 5% and 78 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [5.1-71].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 220 140 71 13 35 52 40
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 19 18 68 21 47 32 40
8330 FOREMEN, METAL SHAPING AND FORMING OCCUPATIONS, EXCEPT MACHINING 24 23 15 14 62 47 40 13 5
8592 Marine Craft Fabricating, Assembling and Repairing Occupations 38 35 21 19 55 57 33 9.5 5
8333 SHEET-METAL WORKERS 88 65 47 33 53 53 45 2.1 10

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 220 140 71 13 35 52 5 40
8337 BOILERMAKERS, PLATERS AND STRUCTURAL-METAL WORKERS 28 26 19 18 68 21 47 32 5 40
8319 METAL MACHINING OCCUPATIONS, N.E.C. 21 21 3 3 14 33 33 33 3.1 40
6111 FIRE-FIGHTING OCCUPATIONS 63 57 2 2 3.2 0 100 0 2.8 22
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 2 2 18 50 50 0 2.6 22

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 217 cells have a non null probability of exposure, with 92 lower than 5% and 125 greater than 5%. The median and range of probability values among cells with >5% probability is 12% [5-72].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
3023 Pre-Engineered Metal Buildings Industry (Except Portable) 36 32 26 22 72 54 31 15 10
3021 Metal Tanks (Heavy Gauge) Industry 13 9 9 6 69 44 56 0 40
3241 Truck and Bus Body Industry 30 21 18 14 60 56 28 17 40
9942 Welding 19 17 11 10 58 9.1 45 45 40
3271 Shipbuilding and Repair Industry 180 150 100 89 57 32 36 32 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
1041 Fluid Milk Industry 53 51 1 1 1.9 0 0 100 25 40
3259 Other Motor Vehicle Accessories, Parts and Assemblies Industries 10 9 1 1 10 0 0 100 25 40
4216 Asphalt Paving 15 12 1 1 6.7 0 0 100 25 40
814 Foreign Affairs and International Assistance 16 13 1 1 6.2 0 0 100 25 40
4021 Manufacturing and Light Industrial Building 19 16 1 1 5.3 0 0 100 16 48

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Soldering fumes

Fumes generated during soldering operations. Soldering is the joining of metal using a filler metal (solder) with a melting point less than 400°C. The quality of the fumes depends on the composition of the solder and of the fluxes and on the production techniques used.


In the current CANJEM database, 287 jobs are exposed at low concentration, 487 at medium, and 69 at high, for a total of 2.7 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 103 cells have a non null probability of exposure, with 49 lower than 5% and 54 greater than 5%. The median and range of probability values among cells with >5% probability is 11% [5-100].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8537 RADIO AND TELEVISION REPAIRMEN 25 17 25 17 100 12 72 16 5
8534 ELECTRONIC EQUIPMENT FABRICATING AND ASSEMBLING OCCUPATIONS 33 28 29 24 88 34 55 10 40
8791 PIPEFITTING, PLUMBING AND RELATED OCCUPATIONS, N.E.C. 200 130 130 89 63 28 69 3.9 5
8535 ELECTRONIC AND RELATED EQUIPMENT INSTALLING AND REPAIRING OCCUPATIONS. N.E.C. 53 32 33 20 62 18 82 0 5
8733 CONSTRUCTION ELECTRICIANS AND REPAIR WORKERS 140 100 75 61 55 17 72 11 2.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8148 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, METAL PROCESSING 57 55 2 2 3.5 50 0 50 13 40
8526 INSPECTING AND TESTING OCCUPATIONS, FABRICATING AND ASSEMBLING METAL PRODUCTS, N.E.C. 37 33 1 1 2.7 0 100 0 5.6 45
5135 SALESMEN AND SALESPERSONS, COMMODITIES, N.E.C. 490 380 1 1 0.2 0 100 0 5 40
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 50 46 16 8 52 40 5 40
8155 FORMING OCCUPATIONS: CLAY, GLASS AND STONE 24 23 1 1 4.2 0 0 100 3.1 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 165 cells have a non null probability of exposure, with 86 lower than 5% and 79 greater than 5%. The median and range of probability values among cells with >5% probability is 8.5% [5-71].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4241 Plumbing 130 92 91 68 71 32 68 0 5
6223 Appliance, Television, Radio and Stereo Repair Shops 27 23 16 14 59 19 75 6.2 5
3359 Other Communication and Electronic Equipment Industries 130 100 58 52 46 34 57 8.6 40
4261 Electrical Work 140 100 62 48 44 19 79 1.6 1
4236 Sheet Metal and Built-up Roofing 12 12 5 5 42 40 40 20 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
2711 Pulp Industry 90 77 2 2 2.2 0 50 50 13 22
3333 Electric Lamp (Bulb and Tube) Industry 12 10 2 2 17 0 50 50 12 40
3281 Boatbuilding and Repair Industry 13 12 1 1 7.7 0 100 0 5.6 45
6342 Tire, Battery, Parts and Accessories Stores 23 21 1 1 4.3 0 100 0 5 40
8123 Police Services 18 15 1 1 5.6 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Inorganic acid solutions

Inorganic acids are high volume chemicals used extensively in chemical process industries (fertilizers, soap, rayon, film, and explosives manufacturing, etc.). Solutions of hydrochloric, sulphuric, and nitric acids are the main substances included in this category. They have been used in batteries, as metal cleaners, as chemical reagents in laboratories, and in the pharmaceutical industry.


In the current CANJEM database, 947 jobs are exposed at low concentration, 495 at medium, and 60 at high, for a total of 4.7 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 184 cells have a non null probability of exposure, with 72 lower than 5% and 112 greater than 5%. The median and range of probability values among cells with >5% probability is 13% [5-94].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9591 PHOTOGRAPHIC PROCESSING AND FINISHING OCCUPATIONS 18 17 17 16 94 29 71 0 2.5
9515 PHOTOENGRAVING AND RELATED OCCUPATIONS 13 9 12 8 92 8.3 92 0 5
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 31 28 82 0 55 45 40
2111 CHEMISTS 37 22 29 17 78 59 38 3.4 12
8782 BRICK AND STONE MASONS AND TILE SETTERS 120 95 80 69 70 88 12 0 0.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 4 3 36 0 50 50 16 40
8149 METAL PROCESSING AND RELATED OCCUPATIONS, N.E.C. 15 13 1 1 6.7 0 0 100 14 40
9133 CONDUCTORS AND BRAKE WORKERS, RAILWAY 42 34 1 1 2.4 0 100 0 6.2 50
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 31 28 82 0 55 45 5 40
8296 INSPECTING, TESTING. GRADING AND SAMPLING OCCUPATIONS, PROCESSING. N.E.C. 15 14 1 1 6.7 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 264 cells have a non null probability of exposure, with 108 lower than 5% and 156 greater than 5%. The median and range of probability values among cells with >5% probability is 10% [5-77].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
4231 Masonry Work 60 49 46 41 77 85 15 0 0.5
4241 Plumbing 130 92 82 62 64 54 46 0 5
8668 Offices of Denturists 18 13 11 6 61 36 64 0 0.5
9931 Photographers 30 27 18 15 60 33 67 0 5
3041 Custom Coating of Metal Products Industry 33 23 19 15 58 5.3 26 68 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3081 Machine Shop Industry 87 71 3 3 3.4 33 0 67 25 40
3041 Custom Coating of Metal Products Industry 33 23 19 15 58 5.3 26 68 15 40
2951 Primary Production of Aluminum Industry 19 16 1 1 5.3 0 0 100 14 40
3049 Other Stamped and Pressed Metal Products Industries 53 41 9 8 17 22 78 0 5 40
3052 Wire and Wire Rope Industry 21 16 5 4 24 20 40 40 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Phosphoric acid

A colorless, syrupy liquid usually sold as an aqueous solutions containing between 10 and 90% acid. It is mostly converted into calcium or ammonium phosphates for fertilizers, but can also be used to etch metals for better paint adhesion. Phosphoric acid has also been used in the textile, rubber and food industries.


In the current CANJEM database, 115 jobs are exposed at low concentration, 32 at medium, and 1 at high, for a total of 0.47 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 42 cells have a non null probability of exposure, with 31 lower than 5% and 11 greater than 5%. The median and range of probability values among cells with >5% probability is 15% [6.9-56].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
9512 PRINTING PRESS OCCUPATIONS 94 62 53 32 56 89 11 0 40
9515 PHOTOENGRAVING AND RELATED OCCUPATIONS 13 9 7 6 54 14 86 0 5
3113 DENTISTS 13 11 6 6 46 100 0 0 5
9510 FOREMEN/WOMEN, PRINTING AND RELATED OCCUPATIONS 15 12 3 3 20 100 0 0 5
6163 DRY-CLEANING OCCUPATIONS 21 18 4 4 19 25 75 0 0.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8335 WELDING AND FLAME CUTTING OCCUPATIONS 310 220 2 2 0.64 0 100 0 1.8 14
6191 JANITORS, CHARWORKERS AND CLEANERS 620 530 1 1 0.16 100 0 0 1.2 48
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 3 2 7.9 67 33 0 1 40
8599 OTHER PRODUCT FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS, N.E.C. 120 110 1 1 0.83 100 0 0 1 40
9318 OCCUPATIONS IN LABOURING AND OTHER ELEMENTAL WORK, MATERIAL HANDLING, N.E.C. 610 530 2 2 0.33 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 43 cells have a non null probability of exposure, with 35 lower than 5% and 8 greater than 5%. The median and range of probability values among cells with >5% probability is 13% [9.1-24].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
2819 Other Commercial Printing Industries 220 150 54 34 24 94 5.6 0 40
2811 Business Forms Printing Industry 35 28 8 7 23 75 25 0 5
2732 Corrugated Box Industry 14 12 2 1 14 100 0 0 40
2821 Platemaking, Typesetting and Bindery Industry 43 31 6 5 14 17 83 0 5
6352 Paint and Body Repair Shops 52 35 6 5 12 100 0 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
3611 Refined Petroleum Products Industry (Except Lubricating Oil and Grease) 170 130 1 1 0.57 0 0 100 3.1 5
4129 Other Heavy Construction 94 75 1 1 1.1 0 100 0 3 24
2732 Corrugated Box Industry 14 12 2 1 14 100 0 0 1 40
2819 Other Commercial Printing Industries 220 150 54 34 24 94 5.6 0 1 40
3921 Jewellery and Silverware Industry 95 77 2 1 2.1 100 0 0 1 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Sulphuric acid

An oily, highly corrosive liquid made by burning sulphur to the dioxide, oxidizing to the trioxide and reacting with steam. Produced industrially for over 200 years, this is an important raw material in the manufacture of fertilizers, rayon, and soap and is also commonly used in chemistry laboratories and in the pharmaceutical industry. It has also been used in the pickling and cleaning of metals, as an electrolyte in batteries, and in the purification of petroleum products.


In the current CANJEM database, 870 jobs are exposed at low concentration, 335 at medium, and 31 at high, for a total of 3.9 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 136 cells have a non null probability of exposure, with 59 lower than 5% and 77 greater than 5%. The median and range of probability values among cells with >5% probability is 17% [5-91].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8135 METAL ROLLING OCCUPATIONS 11 11 10 10 91 90 10 0 40
8137 MOULDING, COREMAKING AND METAL CASTING 40 32 35 28 88 97 2.9 0 5
6111 FIRE-FIGHTING OCCUPATIONS 63 57 50 48 79 98 2 0 0.5
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 30 27 79 0 87 13 40
8330 FOREMEN, METAL SHAPING AND FORMING OCCUPATIONS, EXCEPT MACHINING 24 23 19 19 79 95 5.3 0 0.5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 occupations with the highest intensity of exposure (FWI)

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
8149 METAL PROCESSING AND RELATED OCCUPATIONS, N.E.C. 15 13 2 2 13 0 0 100 35 56
9133 CONDUCTORS AND BRAKE WORKERS, RAILWAY 42 34 1 1 2.4 0 100 0 6.2 50
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 4 3 36 0 100 0 5 40
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 30 27 79 0 87 13 5 40
8260 FOREMAN, TEXTILE PROCESSING OCCUPATION S 19 18 1 1 5.3 0 100 0 5 40

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week



JEM based on industry (Canadian SIC 1980)


The matrix based on industry contains 495 cells, covering 96 percent of the CANJEM population. 225 cells have a non null probability of exposure, with 88 lower than 5% and 137 greater than 5%. The median and range of probability values among cells with >5% probability is 10% [5-86].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 industries with the highest probability of exposure

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8324 Firefighting Services 43 39 37 35 86 97 2.7 0 0.5
3041 Custom Coating of Metal Products Industry 33 23 20 17 61 0 90 10 40
2971 Copper and Copper Alloy Rolling, Casting and Extruding Industry 45 37 21 19 47 71 24 4.8 5
9931 Photographers 30 27 14 12 47 43 57 0 2.5
2911 Ferro-alloys Industry 11 10 5 4 45 100 0 0 5

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median.frequency is the median number of hours exposed per week



Top 5 industries with the highest intensity of exposure (FWI)

CTI1980 sic80.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.FWI Median.frequency
1221 Tobacco Products Industry 97 76 1 1 1 0 0 100 25 40
2951 Primary Production of Aluminum Industry 19 16 5 4 26 40 40 20 5 40
3041 Custom Coating of Metal Products Industry 33 23 20 17 61 0 90 10 5 40
3052 Wire and Wire Rope Industry 21 16 6 5 29 33 33 33 3 28
2841 Newspaper, Magazine and Periodical (Combined Publishing and Printing) Industry 160 120 2 2 1.2 0 100 0 2.8 22

ntot is the number of jobs in the cell, nsub the number of subjects, nexp is the number of individual jobs exposed, nexp.s is the number of sibjects exposed, p is probability of exposure in %, p.C1 the proportion of jobs with low concentration, p.C2 the proportion of jobs with medium concentration,p.C3 the proportion of jobs with high concentration, Median FWI is the median frequency weighted intensity,Median.frequency is the median number of hours exposed per week.

Definition of the agent

Nitric acid

A reddish fuming liquid usually marketed in aqueous solutions. The main uses of nitric acid are in the production of fertilizers and explosives. It has also been used in metal degreasing, electroplating, and as a reagent in chemical laboratories.


In the current CANJEM database, 44 jobs are exposed at low concentration, 96 at medium, and 5 at high, for a total of 0.46 percent exposed.


JEM based on occupation (4-digit CCDO 1971)


The matrix based on occupation contains 361 cells, covering 98 percent of the CANJEM population. 49 cells have a non null probability of exposure, with 32 lower than 5% and 17 greater than 5%. The median and range of probability values among cells with >5% probability is 9.1% [5-47].

The following tables present the 5 top occupations with the highest probability of exposure and weighted intensity of exposure, respectively.


Top 5 occupations with the highest probability of exposure

ccdo4 ccdo4.label ntot nsub nexp nexp.s p p.C1 p.C2 p.C3 Median.frequency
8143 PLATING, METAL SPRAYING AND RELATED OCCUPATIONS 38 35 18 15 47 11 83 5.6 12
2117 PHYSICAL SCIENCES TECHNOLOGISTS AND TECHNICIANS 43 28 13 9 30 31 69 0 5
8591 JEWELLERY AND SILVERWARE FABRICATING, ASSEMBLING AND REPAIRING OCCUPATIONS 46 37 13 8 28 31 69 0 5
8130 FOREMAN, METAL PROCESSING AND RELATED OCCUPATIONS 11 9 3 2 27 0 100 0 40
9515 PHOTOENGRAVING AND RELATED OCCUPATIONS 13 9