181. The Effect of Local Exhaust Ventilation Controls on Dust Exposures During Masonry Activities

Croteau, G.; Flanagan, Mary Ellen; Seixas, Noah S.; Guffey, Steven E.

doi:10.3320/1.2765699

Cited by 4 publications

(9 citation statements)

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“…In his thesis Croteau (16) also looked at controls for respirable dust exposures on both fixed and handheld masonry saws. A…”

Section: Cutting and Sawing Operationsmentioning

confidence: 99%

“…(2000). (16) A lab and field study (24) of dust suppression systems for cutoff saws in the construction industry noted on-site reductions of from 3-7 times for both wet methods and local exhaust ventilation (LEV). The diameters of the saw blades were 9 and 12 inches and both diamond and resin-glass fiber type blades were used.…”

Section: Cutting and Sawing Operationsmentioning

confidence: 99%

“…Several studies (14)(15)(16)(17)(18) reported field measurements of worker exposure during these types of grinding operations. The first (14) involved respirable silica exposures on workers using grinders to remove old mortar during a renovation.…”

Section: Mortar Removal Prior To Re-pointingmentioning

confidence: 99%

“…The experiments were conducted in reasonably (2000). (16) well-controlled environments to correct for confounding conditions; for example, cross drafts, silica content of the materials, and differing work rates. An angle grinder (Flex Model F1509 FR) was used to remove mortar prior to tuck pointing.…”

Section: Figurementioning

confidence: 99%

“…A Master's thesis (16) involved a controlled field experiment examining several different silica exposure scenarios including sawing brick and concrete block, grinding mortar from between brick, and surface grinding. This work presents one of the more careful and useful data sets available for evaluating controls.…”

Section: Figurementioning

confidence: 99%

See 4 more Smart Citations

Engineering Controls for Selected Silica and Dust Exposures in the Construction Industry -- A Review

Flynn

Susi²

2003

Applied Occupational and Environmental Hygiene

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This literature review summarizes engineering control technology research for dust and silica exposures associated with selected tasks in the construction industry. Exposure to crystalline silica can cause silicosis and lung fibrosis, and evidence now links it with lung cancer. Of over 30 references identified and reviewed, 16 were particularly significant in providing data and analyses capable of documenting the efficacy of various engineering controls. These reports include information on generation rates and worker exposures to silica and dust during four different tasks: cutting brick and concrete block, grinding mortar from between bricks, drilling, and grinding concrete surfaces. The major controls are wet methods and local exhaust ventilation. The studies suggest that while the methods provide substantial exposure reductions, they may not reduce levels below the current ACGIH threshold limit value (TLV) of 0.05 mg/m(3) for respirable quartz. Although further research on controls for these operations is indicated, it is clear that effective methods exist for significant exposure reduction.

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“…In his thesis Croteau (16) also looked at controls for respirable dust exposures on both fixed and handheld masonry saws. A…”

Section: Cutting and Sawing Operationsmentioning

confidence: 99%

Section: Cutting and Sawing Operationsmentioning

confidence: 99%

Section: Mortar Removal Prior To Re-pointingmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

See 3 more Smart Citations

Engineering Controls for Selected Silica and Dust Exposures in the Construction Industry -- A Review

Flynn

Susi²

2003

Applied Occupational and Environmental Hygiene

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61st Annual Meetings of the American Conference of Governmental Industrial Hygienists and the American Industrial Hygiene Association

Pierce¹

2001

Applied Occupational and Environmental Hygiene

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The Effect of Local Exhaust Ventilation Controls on Dust Exposures During Concrete Cutting and Grinding Activities

et al. 2002

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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. Work activities were performed by union-sponsored apprentices and included tuck-point grinding, surface grinding, paver block and brick cutting (masonry saw), and concrete block cutting (hand-held saw). In a randomized block design, implemented under controlled field conditions, three ventilation rates (0, 30, and 75 cfm) were tested for each tool. Each ventilation treatment was replicated three times in random order for a total of nine 15-min work sessions per study subject. With the exception of the hand-held saw, the use of LEV resulted in a significant (p < 0.05) reduction in respirable dust exposure. Mean exposure levels for the 75 cfm treatments were less than that of the 30 cfm treatments; however, differences between these two treatments were only significant for paver block cutting (p < 0.01). Although exposure reduction was significant (70-90% at the low ventilation rate and 80-95% reduction at the high ventilation rate), personal respirable dust [corrected] exposures remained very high: 1.4-2.8 x PEL (permissible exposure limit) at the low ventilation rate and 0.9-1.7 x 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 has merit, as it would reduce the risk of workers developing disease, allow workers to use a lower level of respiratory protection, protect workers during short duration work episodes reduce exposure to nearby workers, and reduce clean-up associated dust exposures.

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181. The Effect of Local Exhaust Ventilation Controls on Dust Exposures During Masonry Activities

Cited by 4 publications

References 0 publications

Engineering Controls for Selected Silica and Dust Exposures in the Construction Industry -- A Review

Engineering Controls for Selected Silica and Dust Exposures in the Construction Industry -- A Review

61st Annual Meetings of the American Conference of Governmental Industrial Hygienists and the American Industrial Hygiene Association

The Effect of Local Exhaust Ventilation Controls on Dust Exposures During Concrete Cutting and Grinding Activities

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