In-Depth Study Report: Control Technology for Crystalline Silica Exposures in Construction: Exposures and Preliminary Control Evaluation at a Restoration Preservation Masonry Construction Site

Details

• Personal Author:
  Bennett, James S. ; Heitbrink, William A.
• Corporate Authors:
  National Institute for Occupational Safety and Health. Division of Applied Research and Technology
• Description:
  Respirable silica exposures were measured while workers were using grinders to remove old mortar during a building renovation. Respirable silica exposures ranged from 0.1 to 4.5 mg/cum for workers who were grinding mortar. A ventilated shroud was used in an ineffective attempt to capture the dust generated by the grinders. The pressure drop through the shroud, hoses, PVC pipe, and settling chamber were thought to be too large in relationship to the fan's capability to develop static pressure at the needed flow rate. Furthermore, the air was discharged back into the workplace without passing through an appropriate filter to remove the respirable dust. The lack of a filter could result in the dispersal of respirable dust throughout the workplace.
• Subjects:
  Construction Industry Occupational Health Safety Silicon Dioxide Ventilation
• Keywords:
  Construction Grinding-equipment OSHA Region 1 Silica-dusts Ventilation-equipment
• Series:
  Engineering and Physical Hazards Survey Reports
• DOI:
  https://doi.org/10.26616/NIOSHEPHB24714
• Publisher:
  National Institute for Occupational Safety and Health
• Document Type:
  Text
• Genre:
  Field Study
• Place as Subject:
  Massachusetts ; OSHA Region 1
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DART - Division of Applied Research and Technology ; EPHB - Engineering and Physical Hazards Branch
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-21
• Contributor:
  Farwick, Daniel R. ; Clark, Bernice L.
• NIOSHTIC Number:
  nn:20000931
• NTIS Accession Number:
  PB2001-101672
• Citation:
  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, EPHB 247-14, 2000 Nov ; :1-21
• CAS Registry Number:
  Quartz (SiO2) (CAS RN 14808-60-7)
• Federal Fiscal Year:
  2001
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:aa2552acc920db57c22de8f4f81e5bbb2a0d3ad0ea32fe7821cc7edb076542f00e44f2a28a48aac18d109fae54dc7dbe00e12079b252388ad932b9f9818ad5b1
• Download URL:
  https://stacks.cdc.gov/view/cdc/174897/cdc_174897_DS1.pdf
• File Type:
  [PDF - 429.71 KB ]