Occupational exposure standards in Canada: from ACGIH to?

The methods to control exposure to hazardous substances in Canadian workplaces have undergone several changes over the past 50 years. At first, government officials simply used good ventilation practices as a guide. Later, when the ACGIH published recommended exposure limits, a closely knit industrial hygiene community readily adopted them. Recently, the pre-eminent position of the ACGIH has come under scrutiny. As a consequence, there is a search for new bipartite or tripartite approaches toward standard setting.