Journal of Community Medicine & Health Education
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n this study we proposed a semi-quantitative exposure risk assessment model, Exposure Hazard
Index (EHI), to access the potential chemical exposure risk of workers in various occupational
environments. The model was applied to two national-wide workers? chemical exposure databanks,
which were established in 1996-1999 and 2006-2009, respectively, to examine the change in various
industrial hygiene measures national wide during the above two periods of time. Results show that
potential chemical exposure risks had been significantly reduced. The top two major causes for the
reduction of the exposure risk were the ?reducing exposure time? and ?conducting more effective
industrial hygiene management system?. Nevertheless, results also show that ?application of effective
engineering control strategies? was slight deterioration. The above results suggest that the governmental
industrial hygiene inspection should focus more on the installation of engineering control devices of
industries, rather than on management issues. In conclusion, using the semi-quantitative exposure
risk assessment model could not only be used for accessing the potential chemical exposure risk,
but also could serve as a tool for identifying the exposure hazard factors which should be improved.
The information is useful for both industrial hygienists and the government agencies to assess the
effectiveness of the adopted industrial hygiene control programs and to initiate an effective strategy for
the abatement of workers? exposures.
Perng- Jy Tsai is a professor and dean in the department of Occupational Safety and Health, College of Public Health,
China Medical University. Prof. Tsai completed his Ph.D. in Environmental and Occupational Health from University
of Minnesota, USA. He published more than 100 research papers in the reputed journals including 1 patent. He has
specialization in Occupational and Environmental Health, Industrial Hygiene, Environmental monitoring, Industrial safety
and Noise control.
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