Abstract
ABSTRACTData from the Workplace Environmental Monitoring Program was used to evaluate the concentrations and risk of occupational exposure to styrene in different industries to identify which industries should be prioritized for styrene exposure management. Risk assessments were conducted for the five industries with several workplaces that mostly use styrene: motor vehicle and motorcycle maintenance and repair services, other chemical product manufacturing, ship and boat building, basic chemical manufacturing, and plastic products manufacturing. The highest central tendency exposure was found in the plastic products manufacturing industry (10.14 mg/m3). In addition, the hazard quotient (HQ) for central tendency exposure exceeded 1 only in the plastic products manufacturing industry. Almost two-thirds (62.2%) of workplaces in the plastic products manufacturing industry have an HQ exceeding 1. We conclude that workers in the plastic products manufacturing industry are at the highest risk for styrene exposure, and those in motor vehicle and motorcycle maintenance and repair service and basic chemical manufacturing are at the lowest risk. These results show that styrene exposure could be most effectively managed by prioritizing control measures in the plastic products manufacturing industry.
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