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Effective dust control systems on concrete dowel drilling machinery.
J Occup Environ Hyg. 2016 09; 13(9):718-24.JO

Abstract

Rotary-type percussion dowel drilling machines, which drill horizontal holes in concrete pavement, have been documented to produce respirable crystalline silica concentrations above recommended exposure criteria. This places operators at potential risk for developing health effects from exposure. United States manufacturers of these machines offer optional dust control systems. The effectiveness of the dust control systems to reduce respirable dust concentrations on two types of drilling machines was evaluated under controlled conditions with the machines operating inside large tent structures in an effort to eliminate secondary exposure sources not related to the dowel-drilling operation. Area air samples were collected at breathing zone height at three locations around each machine. Through equal numbers of sampling rounds with the control systems randomly selected to be on or off, the control systems were found to significantly reduce respirable dust concentrations from a geometric mean of 54 mg per cubic meter to 3.0 mg per cubic meter on one machine and 57 mg per cubic meter to 5.3 mg per cubic meter on the other machine. This research shows that the dust control systems can dramatically reduce respirable dust concentrations by over 90% under controlled conditions. However, these systems need to be evaluated under actual work conditions to determine their effectiveness in reducing worker exposures to crystalline silica below hazardous levels.

Authors+Show Affiliations

a Division of Applied Research and Technology, National Institute for Occupational Safety and Health , Cincinnati , Ohio.b Department of Epidemiology , University of Kentucky , Lexington , Kentucky.a Division of Applied Research and Technology, National Institute for Occupational Safety and Health , Cincinnati , Ohio.a Division of Applied Research and Technology, National Institute for Occupational Safety and Health , Cincinnati , Ohio.a Division of Applied Research and Technology, National Institute for Occupational Safety and Health , Cincinnati , Ohio.a Division of Applied Research and Technology, National Institute for Occupational Safety and Health , Cincinnati , Ohio.

Pub Type(s)

Evaluation Study
Journal Article

Language

eng

PubMed ID

27074062

Citation

Echt, Alan S., et al. "Effective Dust Control Systems On Concrete Dowel Drilling Machinery." Journal of Occupational and Environmental Hygiene, vol. 13, no. 9, 2016, pp. 718-24.
Echt AS, Sanderson WT, Mead KR, et al. Effective dust control systems on concrete dowel drilling machinery. J Occup Environ Hyg. 2016;13(9):718-24.
Echt, A. S., Sanderson, W. T., Mead, K. R., Feng, H. A., Farwick, D. R., & Farwick, D. R. (2016). Effective dust control systems on concrete dowel drilling machinery. Journal of Occupational and Environmental Hygiene, 13(9), 718-24. https://doi.org/10.1080/15459624.2016.1177644
Echt AS, et al. Effective Dust Control Systems On Concrete Dowel Drilling Machinery. J Occup Environ Hyg. 2016;13(9):718-24. PubMed PMID: 27074062.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effective dust control systems on concrete dowel drilling machinery. AU - Echt,Alan S, AU - Sanderson,Wayne T, AU - Mead,Kenneth R, AU - Feng,H Amy, AU - Farwick,Daniel R, AU - Farwick,Dawn Ramsey, PY - 2016/4/14/entrez PY - 2016/4/14/pubmed PY - 2017/11/3/medline KW - Concrete dowel drilling KW - crystalline silica KW - dust control systems KW - respirable dust SP - 718 EP - 24 JF - Journal of occupational and environmental hygiene JO - J Occup Environ Hyg VL - 13 IS - 9 N2 - Rotary-type percussion dowel drilling machines, which drill horizontal holes in concrete pavement, have been documented to produce respirable crystalline silica concentrations above recommended exposure criteria. This places operators at potential risk for developing health effects from exposure. United States manufacturers of these machines offer optional dust control systems. The effectiveness of the dust control systems to reduce respirable dust concentrations on two types of drilling machines was evaluated under controlled conditions with the machines operating inside large tent structures in an effort to eliminate secondary exposure sources not related to the dowel-drilling operation. Area air samples were collected at breathing zone height at three locations around each machine. Through equal numbers of sampling rounds with the control systems randomly selected to be on or off, the control systems were found to significantly reduce respirable dust concentrations from a geometric mean of 54 mg per cubic meter to 3.0 mg per cubic meter on one machine and 57 mg per cubic meter to 5.3 mg per cubic meter on the other machine. This research shows that the dust control systems can dramatically reduce respirable dust concentrations by over 90% under controlled conditions. However, these systems need to be evaluated under actual work conditions to determine their effectiveness in reducing worker exposures to crystalline silica below hazardous levels. SN - 1545-9632 UR - https://www.unboundmedicine.com/medline/citation/27074062/Effective_dust_control_systems_on_concrete_dowel_drilling_machinery_ L2 - https://www.tandfonline.com/doi/full/10.1080/15459624.2016.1177644 DB - PRIME DP - Unbound Medicine ER -