|Document ID (ISN)||100408|
|ISSN - Serial title
||0002-8894 - American Industrial Hygiene Association Journal
|Convention or series no.
||Croteau G.A., Guffey S.E., Flanagan M.E., Seixas N.S.
||The effect of local exhaust ventilation controls on dust exposures during concrete cutting and grinding activities
||July-Aug. 2002, Vol.63, No.4, p.458-467. Illus. 25 ref.
||This study assessed the effectiveness of commercially available local exhaust ventilation (LEV) systems for controlling respirable dust and crystalline silica exposures during concrete cutting and grinding activities using various tools. Three ventilation rates were tested for each tool. With the exception of the hand-held saw, the use of LEV resulted in a significant reduction in respirable dust exposure. Although exposure reduction was significant, personal respirable quartz exposures remained very high: 1.4-2.8 times the permissible exposure limit (PEL) at the low ventilation rate and 0.9-1.7 times the PEL at the high ventilation rate. Exposure levels found under actual field conditions would likely be lower due to the intermittent nature of most job tasks. Despite incomplete control, LEV reduces the risk of workers developing disease, allows workers to use a lower level of respiratory protection, protects workers during short duration work episodes, reduces exposure to nearby workers, and reduces clean-up associated dust exposures.
||cement industry; local exhaust; silica; ventilation design; concrete grinders; limitation of exposure; respirable dust
||power-driven hand tools; exposure evaluation; permissible levels
||D - Periodical articles
|Country / State or Province||USA|
|Broad subject area(s)
||Cement and concrete