SURVEY OF AIRBORNE PARTICULATE MATTER CONCENTRATION AT A MARBLE PROCESSING FACILITY -WORKERSEXPOSURE ASSESSMENT

The scope of the present work was to examine exposure to airborne particulate matter (PM) at a marble cutting and treatment facility. Measurements were conducted inside all sections of the facility, as well as at selected outdoor locations. PM 10concentrations were monitored continuously, with a 1 min time resolution, by the use of DustTrak (Model 8520, TSI, Inc.). Mean PM 10concentration levels during cutting operations were measure d equal to 997 �og m -3 , when all machines were in use and 710 �og m -3 , when only half of the machines were functioning. Higher