Checklist model to improve work practices in small-scale demolition operations with silica dust exposures.
Muianga-C; Rice-C; Lentz-T; Lockey-J; Niemeier-R; Succop-P
Int J Environ Res Public Health 2012 Feb; 9(2):343-361
A systematic approach was developed to review, revise and adapt existing exposure control guidance used in developed countries for use in developing countries. One-page employee and multiple-page supervisor guidance sheets were adapted from existing documents using a logic framework and workers were trained to use the information to improve work practices. Interactive, hands-on training was delivered to 26 workers at five small-scale demolition projects in Maputo City, Mozambique, and evaluated. A pre-and-post walkthrough survey used by trained observers documented work practice changes. Worker feedback indicated that the training was effective and useful. Workers acquired knowledge (84% increase, p < 0.01) and applied the work practice guidance. The difference of proportions between use of work practice components before and after the intervention was statistically significant (p < 0.05). Changes in work practices following training included preplanning, use of wet methods and natural ventilation and end-of-task review. Respirable dust measurements indicated a reduction in exposure following training. Consistency in observer ratings and observations support the reliability and validity of the instruments. This approach demonstrated the short-term benefit of training in changing work practices; follow-up is required to determine the long-term impact on changes in work practices, and to evaluate the need for refresher training.
Small-businesses; Dusts; Dust-exposure; Dust-control; Silica-dusts; Demolition-industry; Control-technology; Work-practices; Training; Construction-industry; Construction-workers;
Author Keywords: work practices; construction sector; dust exposure controls; Mozambique
Custodio Muianga, Department of Environmental Health, College of Medicine, University of Cincinnati, 3223 Eden Ave., Kettering Laboratory, Cincinnati, OH 45267, USA
International Journal of Environmental Research and Public Health