Occupational exposure to welding fume in Australian workplaces

This study aimed to provide information on exposure to welding fume in workplaces in Australia, and the use of control measures in these workplaces. Personal and static samples of welding fume particulates and gases were collected at 20 workplaces whilst welding was being undertaken. Study personnel also recorded observations of the workplace. Total welding fume particulate concentration in the breathing zone was above 1 mg/m³ (the newly established workplace exposure standard). Peak concentrations of ozone were above the peak limitation standard of 0.1 ppm for most workers when they had their head over the welding area. Very few workplaces had active ventilation in place and functioning at the time of the worksite visits, most workplaces relying on natural ventilation coming from the large workspaces, high ceilings and open doors. The use of respiratory protective equipment was sub-optimal; about a quarter of participants used no respiratory protection while welding. This study provides the first comprehensive information on concentration of welding fume particulate and gases in Australian workplaces and the use of relevant control measures. The findings suggest there is considerable scope for improvement in the control of exposure to welding fume.