Objective To evaluate the effect of an occupational hazards control program by a risk assessment model in a battery enterprise and to provide evidence for the enterprise's reform.
Methods A semi-quantitative risk assessment designed for occupational exposure to chemicals in Singapore was applied to systemically identify chemical hazards in the selected enterprise, to grade related risk level by chemical exposure possibility, and to develop corresponding management strategy.
Results The chemical hazards in this enterprise were lead dust, lead fume, and sulfuric acids. The time-weighted average concentration values of lead dust, lead fume, and sulfuric acids were 0.025-0.030 mg/m3, 0.019-0.035 mg/m3, and 0.260 mg/m3, respectively. All estimated hazard classes were 5. The exposure level for lead dust and lead fume at the assembling posts was 3, 2 for lead fume at the slicing posts, and 3 for sulfuric acid at the formation posts.
Conclusion For all operating positions, the risk levels are defined as severe or medium. According to the risk classification of work posts, it is important to focus on the comprehensive prevention and control of occupational hazards, as well as regularly risk assessments.
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