The efficiency of protective hoods used by sandblasters to reduce silica dust exposure.
Samimi B; Neilson A; Weill H; Ziskind M
Am Ind Hyg Assoc J 1975 Feb; 36(2):140-148
The efficiency of several hoods used by sandblasters to reduce the hazards of silica (14808607) exposure was evaluated. Respirable dust samples were collected inside and outside hoods during sandblasting using the MSA Gravimetric Dust Samplers. The hoods used in the study included the non air supplied hood, the Pulmosan air supplied hood, the Bullard 77-D and 77-DH air supplied hoods. The samples were analyzed using colorimetric and x-ray diffraction methods for free silica determination. An average level of silica dust several times higher than the threshold limit values was recorded for the majority of the sandblasters monitored. The greatest risk was incurred by blasters wearing non air supplied hoods. Air supplied hoods, if they were well maintained and properly worn, offered fair protection during blasting operations, but the concentration of suspended respirable dust in ambient air during nonblasting intervals exceeded the threshold limit values by several times. The authors conclude that the use of modern air supplied hoods alone cannot adequately protect the sandblaster from the hazard of silica dust. Regular supervision of the workers, maintenance and repair of protective devices and effective dust suppression measures are also required.
NIOSH-Publication; NIOSH-Grant; Pulmonary-system-disorders; Dust-control; Respiratory-protection; Sand-blasting; Respiratory-protective-equipment; Safety-helmets; Sand-blasters; Silica-dusts; Protective-equipment; Personal-protective-equipment
Medicine Tulane University 1430 Tulane Avenue New Orleans, LA 70112
American Industrial Hygiene Association Journal
Tulane University, New Orleans, Louisiana