title: Engineering controls for selected silica and dust exposures in the construction industry--a review.
abstract: 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.
authors.affiliation: Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
authors.forename: Michael R
authors.initials: MR
authors.lastname: Flynn
authors.forename: Pam
authors.initials: P
authors.lastname: Susi
mesh_terms: D000395:Air Pollutants, Occupational / Q000009:adverse effects*; D003252:Construction Materials / Q000009:adverse effects; D004391:Dust; D005160:Facility Design and Construction; D006801:Humans; D007221:Industry; D008175:Lung Neoplasms / Q000139:chemically induced; D016273:Occupational Exposure / Q000009:adverse effects / Q000032:analysis*; D011658:Pulmonary Fibrosis / Q000139:chemically induced; D012822:Silicon Dioxide / Q000009:adverse effects*; D012829:Silicosis / Q000209:etiology; D000078329:Workforce
chemical_list: D000395:Air Pollutants, Occupational; D004391:Dust; D012822:Silicon Dioxide