Use of downdraft booth design in removing toxic dusts from protective clothing.
Proceedings of the symposium on occupational health hazard control technology in the foundry and secondary non-ferrous smelting industries, December 10-12, 1979, Chicago, Illinois. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 81-114, 1981 Aug; :358-366
A downdraft booth, with compressed air nozzles for cleaning clothes, was designed, constructed and evaluated for its efficiency in cleaning protective clothing as compared to the vacuuming method. The booth was intended to remove lead (7439921) and arsenic (7440382) dust from protective clothing before workers enter lunchroom or changehouse areas. One booth was built outside the lead and arsenic work areas of the Cottrell Department at the copper (7440508) smelter, adjacent to a lunchroom. All the required personal protective equipment, including respiratory protection, was cleaned in the booth while worn. For two weeks during the day shift while the booth was used and for two weeks while the workers' clothes were vacuumed, airborne and settled arsenic levels in the lunchroom were monitored. Very small differences in contamination levels when using either of the two methods were measured in airborne arsenic samples. The differences were not statistically significant. Breathing zone air samples collected while employees used the booth were higher during the vacuuming, as expected. No difference was found between wipe samples collected during vacuuming and those collected during the booth use. The author concludes that the results show that the downdraft booth can be as effective as vacuuming in reducing the contamination and also takes less time and is less cumbersome.
NIOSH-Contract; Contract-210-79-0048; Airborne-dusts; Arsenic-compounds; Lead-dust; Smelting; Vacuum-cleaning-systems; Workplace-studies
7439-92-1; 7440-38-2; 7440-50-8
Proceedings of the symposium on occupational health hazard control technology in the foundry and secondary non-ferrous smelting industries, December 10-12, 1979, Chicago, Illinois