Tags

Type your tag names separated by a space and hit enter

Reducing silica and dust exposures in construction during use of powered concrete-cutting hand tools: efficacy of local exhaust ventilation on hammer drills.
J Occup Environ Hyg. 2009 Jan; 6(1):42-51.JO

Abstract

Concrete cutting in construction is a major source of exposure to respirable crystalline silica. To reduce exposures, local exhaust ventilation (LEV) may be integrated into the hand tools used in concrete cutting. Volunteers from the New England Laborers Training Center participated in a field study focused on the use of LEV on concrete-cutting hammer drills. A randomized block design field experiment employing four workers measured the efficacy of four hood-vacuum source combinations compared with no LEV in reducing dust and silica exposures. Using four-stage personal cascade impactors (Marple 294) to measure dust exposure, a total of 18 personal samples were collected. Reductions of over 80% in all three biologically relevant size fractions of dust (inhalable, thoracic, and respirable) were obtained by using any combination of hood and vacuum source. This study found that respirable dust concentrations were reduced from 3.77 mg/m(3) to a range of 0.242 to 0.370 mg/m(3); thoracic dust concentrations from 12.5 mg/m(3) to a range of 0.774 to 1.23 mg/m(3); and inhalable dust concentration from 47.2 mg/m(3) to a range of 2.13 to 6.09 mg/m(3). Silica concentrations were reduced from 0.308 mg/m(3) to a range of 0.006 to 0.028 mg/m(3) in the respirable size fraction, from 0.821 mg/m(3) to a range of 0.043 to 0.090 mg/m(3) in the thoracic size fraction, and from 2.71 mg/m(3) to a range of 0.124 to 0.403 mg/m(3) in the inhalable size fraction. Reductions in dust concentrations while using the four LEV systems were not statistically significantly different from each other.

Authors+Show Affiliations

Department of Work Environment, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA. susan_shepherd@uml.eduNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

19005968

Citation

Shepherd, S, et al. "Reducing Silica and Dust Exposures in Construction During Use of Powered Concrete-cutting Hand Tools: Efficacy of Local Exhaust Ventilation On Hammer Drills." Journal of Occupational and Environmental Hygiene, vol. 6, no. 1, 2009, pp. 42-51.
Shepherd S, Woskie SR, Holcroft C, et al. Reducing silica and dust exposures in construction during use of powered concrete-cutting hand tools: efficacy of local exhaust ventilation on hammer drills. J Occup Environ Hyg. 2009;6(1):42-51.
Shepherd, S., Woskie, S. R., Holcroft, C., & Ellenbecker, M. (2009). Reducing silica and dust exposures in construction during use of powered concrete-cutting hand tools: efficacy of local exhaust ventilation on hammer drills. Journal of Occupational and Environmental Hygiene, 6(1), 42-51. https://doi.org/10.1080/15459620802561471
Shepherd S, et al. Reducing Silica and Dust Exposures in Construction During Use of Powered Concrete-cutting Hand Tools: Efficacy of Local Exhaust Ventilation On Hammer Drills. J Occup Environ Hyg. 2009;6(1):42-51. PubMed PMID: 19005968.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Reducing silica and dust exposures in construction during use of powered concrete-cutting hand tools: efficacy of local exhaust ventilation on hammer drills. AU - Shepherd,S, AU - Woskie,S R, AU - Holcroft,C, AU - Ellenbecker,M, PY - 2008/11/14/pubmed PY - 2009/2/7/medline PY - 2008/11/14/entrez SP - 42 EP - 51 JF - Journal of occupational and environmental hygiene JO - J Occup Environ Hyg VL - 6 IS - 1 N2 - Concrete cutting in construction is a major source of exposure to respirable crystalline silica. To reduce exposures, local exhaust ventilation (LEV) may be integrated into the hand tools used in concrete cutting. Volunteers from the New England Laborers Training Center participated in a field study focused on the use of LEV on concrete-cutting hammer drills. A randomized block design field experiment employing four workers measured the efficacy of four hood-vacuum source combinations compared with no LEV in reducing dust and silica exposures. Using four-stage personal cascade impactors (Marple 294) to measure dust exposure, a total of 18 personal samples were collected. Reductions of over 80% in all three biologically relevant size fractions of dust (inhalable, thoracic, and respirable) were obtained by using any combination of hood and vacuum source. This study found that respirable dust concentrations were reduced from 3.77 mg/m(3) to a range of 0.242 to 0.370 mg/m(3); thoracic dust concentrations from 12.5 mg/m(3) to a range of 0.774 to 1.23 mg/m(3); and inhalable dust concentration from 47.2 mg/m(3) to a range of 2.13 to 6.09 mg/m(3). Silica concentrations were reduced from 0.308 mg/m(3) to a range of 0.006 to 0.028 mg/m(3) in the respirable size fraction, from 0.821 mg/m(3) to a range of 0.043 to 0.090 mg/m(3) in the thoracic size fraction, and from 2.71 mg/m(3) to a range of 0.124 to 0.403 mg/m(3) in the inhalable size fraction. Reductions in dust concentrations while using the four LEV systems were not statistically significantly different from each other. SN - 1545-9632 UR - https://www.unboundmedicine.com/medline/citation/19005968/Reducing_silica_and_dust_exposures_in_construction_during_use_of_powered_concrete_cutting_hand_tools:_efficacy_of_local_exhaust_ventilation_on_hammer_drills_ L2 - https://www.tandfonline.com/doi/full/10.1080/15459620802561471 DB - PRIME DP - Unbound Medicine ER -