As a result of a symposium in 1976, recommendations
were made and preventative measures were
taken in Canada in the late 1970s until the mid-1980s
to reduce the 8-h time-weighted average grain dust
exposure in grain elevators to 10 mg/m3. In a report
to the grain industry by Dosman et al15 and by
Becklake et al,16 recommendations were made to
reduce this dust further to 5 mg/m3.