Establishment of exposure risk assessment technique with continuous monitoring of personal environment.

本研究探索了个人持续暴露监测风险评估的通用技术，旨在建立风险评估技术，以确定措施的优先级，并从监测数据、防护装备的有效性和人体摄入量的估计中得出有效的措施。在有机物质方面，通过对机洗工作、化学合成机器维修工作等的现场测量数据的积累，证明了可以根据工作实践了解个人接触浓度的变化。研究结果的一部分发表在一篇科学论文上。对化纤纺丝过程中的噪声进行了测量，并对其听力损失风险进行了评估。对于气溶胶，连续监测个人接触被证明能够澄清接触的瞬时变化，并确定必要的措施，以减少接触有害物质，如焊接烟雾。因此，通过对个人接触情况的连续监测，可以有效地评估防尘装置的通风性能。这一结果发表在一篇科学论文上。综述了有机溶剂蒸气和气体暴露浓度估算数学模型的研究进展，并发表了科学论文。本研究成果为今后的风险评价研究提供了基础数据。

General-purpose techniques of the risk assessment with the continuous personal exposure monitoring were explored in this research, and it was aimed at establishing the risk assessment techniques to decide the priority of the measures and to derive the effective measures from monitored data, effectiveness of the protective equipments, and the estimation of the amount of the body intake.As for organic material, on-site measurement data were accumulated on the machine washing work, the maintenance work for chemosynthesis machines, and so on, and it was demonstrated that it was possible to know the changes in personal exposure concentration in accordance with the work practices. A part of the results was publicized in a scientific paper.As for noise, measurement were carried out and risk of hearing loss was assessed in the chemical fiber spinning process.As for aerosol, continuous monitoring of personal exposures was proved to be able to clarify instantaneous changes of exposure and identify necessary measures to reduce the exposure to hazardous substances such as a welding fume. The ventilation performance of dust-proofing devices can therefore be evaluated effectively with such continuous monitoring of personal exposures. This results was publicized in a scientific paper.Also, the research of the mathematical model which estimate the exposure concentrations of the vapor and gas of organic solvents was reviewed and the outcome was publicized, in a scientific paper. The achievements of this research were viewed to have the fundamental data of the future risk assessment research.