IRSST - Institut de recherche Robert-Sauvé en santé et en sécurité du travail

Evaluation of polycyclic aromatic hydrocarbon (PAH) exposure in a number of industrial sectors

Abstract

Although the carcinogenicity of a number of polycyclic aromatic hydrocarbons (PAH) has been well-documented, the absence of an adequate analytical method has obliged studies of the exposure of Québec workers to focus on other, less specific contaminants, such as pitch. Further, neither industry-specific exposure profiles nor vapour/particle partition profiles of airborne PAH have been studied in Québec settings. This project was therefore undertaken to establish a sampling protocol allowing worker exposure to be adequately characterized, and to document the exposure profiles of a number of key industrial sectors.

The project comprised three phases: laboratory research, field validation, and determination, by CSST (Commission de la santé et de la sécurité du travail du Québec, Québec Occupational Health and Safety Commission) industrial hygienists, of the exposure profiles of high-risk workstations. The method developed in the laboratory has a 95% confidence interval of ±10% for 12 PAH species in either the particulate or vapour phase. Field studies indicate that the temperature at which sampling is performed influences the final results, and ultimately, the evaluation of worker exposure. Finally, the industrial profiles indicate that environmental and medical surveillance programs should be developed for workers in the aluminum smelting and refractory brick production sectors, and for workers employed at a number of sites in steel mills. On the other hand, the exposure profile of workers employed in paving and roofing, and at a number of sites in steel foundries and silicon carbide plants is much less significant. As a result of these projects, various plants have modified their PAH emission sources or taken other preventive measures.

Additional Information

Type: Project
Number: 0083-0200
Status: Completed
Year of completion: 1984
Team:
  • Guy Perrault (IRSST)
  • Jacques Lesage (IRSST)