WOOD-DUST EXPOSURE DURING WOOD-WORKING PROCESSES

Personal and ambient full shift concentrations of inhalable wood dust were measured at different wood-working processes in two joineries and a furniture factory in The Netherlands. The current occupational exposure limit for wood dust is still 5 mg m(-3) total dust, but the Dutch Expert Committee for Occupational Standards has recently recommended a health-based limit of 0.2 mg m(-3) (total wood dust), The main purpose of the present study was to characterize current wood-dust exposures during different wood-working activities in order to determine whether compliance with the proposed limit was feasible. The wood-dust exposures in the joineries were usually much lower than 5 mg m(-3), but in the furniture factory the present limit was regularly exceeded. Sanding, especially hand sanding, nearly always resulted in exposures above 5 mg m(-3) Almost all personal exposures were higher than the proposed health-based limit of 0.2 mg m(-3) and therefore can be considered to generate a health risk to the workers. The measurements performed may help in setting priorities and will serve as a basis for the development of a control strategy to reduce the average exposure.