The Efficacy of Local Exhaust Ventilation for Controlling Dust Exposures During Concrete Surface Grinding

Details

• Personal Author:
  Croteau GA ; Flanagan ME ; Guffey SE ; Seixas, Noah S.
• Description:
  This study assessed the effectiveness of a commercially available local exhaust ventilation (LEV) system for controlling respirable dust and crystalline silica exposures during concrete grinding activities. Surface grinding was conducted at six commercial building construction sites in Seattle, WA, by cement masons. Time-integrated filter samples and direct reading respirable dust concentrations were collected using a cyclone in line with a direct reading respirable dust monitor. Personal exposure levels were determined with and without LEV, one sample directly after the other. A total of 28 paired samples were collected in which three different dust collection shroud configurations were tested. Data obtained with a direct reading respirable dust monitor were adjusted to remove non-work task-associated dust exposures and was subsequently used to calculate the exposure reduction achieved. The application of LEV resulted in a reduction in the overall geometric mean respirable dust exposure from 4.5 to 0.14 mg/m(3), a mean exposure reduction of 92%. Despite the effective control of dust generated during surface grinding, 22 and 26% of the samples collected while LEV was being used were greater than the 8 h time-weighted average permissible exposure limit (Occupational Safety and Health Administration) and threshold limit value (American Congress of Governmental Industrial Hygienists) for respirable crystalline silica, respectively. [Description provided by NIOSH]
• Subjects:
  Construction Industry Construction Materials Dust Occupational Health Personal Protective Equipment Quartz Respiratory Protective Devices Safety Silicon Dioxide Ventilation
• Keywords:
  Author Keywords: Construction Construction-industry Construction-materials Control-technology Dust-control Dust-control-equipment Dust-exposure Dust-inhalation Dust-measurement Dust Control Exhaust-systems Local Exhaust Ventilation Masons Quartz-dust Respirable-dust Respiratory-protection Silica Silica-dusts Surface Grinding Ventilation-systems

  More +
• ISSN:
  0003-4878
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 10 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  48
• Issue:
  6
• NIOSHTIC Number:
  nn:20029040
• Citation:
  Ann Occup Hyg 2004 Aug; 48(6):509-518
• Contact Point Address:
  Gerry A. Croteau, Department of Environmental and Occupational Health Sciences, University of Washington, 4225 Roosevelt Way NE, Suite 100, Seattle, WA 98105-6099
• Email:
  croteau@u.washington.edu
• CAS Registry Number:
  Quartz (SiO2) (CAS RN 14808-60-7)
• Federal Fiscal Year:
  2004
• NORA Priority Area:
  Research Tools and Approaches: Intervention Effectiveness Research
• Performing Organization:
  University of Washington, Seattle, Washington
• Peer Reviewed:
  True
• Start Date:
  19990930
• Source Full Name:
  Annals of Occupational Hygiene
• End Date:
  20010929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:df0b72d29191a1fba87222e437782108b738f7146aa633b396ae990c7b0a36edb8203a9861194c913345e9e2e6964eb762ff56059367496de14ededda0362d13
• Download URL:
  https://stacks.cdc.gov/view/cdc/190113/cdc_190113_DS1.pdf
• File Type:
  [PDF - 184.46 KB ]