Title: Checklist model to improve work practices in small-scale demolition operations with silica dust exposures.

Authors: Muianga, Custodio; Rice, Carol; Lentz, Thomas; Lockey, James; Niemeier, Richard; Succop, Paul

Published In Int J Environ Res Public Health, (2012 02)

Abstract: 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.

PubMed ID: 22470296

MeSH Terms: Dust*; Explosions*; Guidelines as Topic; Models, Organizational*; Mozambique; Occupational Exposure*; Silicon Dioxide*