Chemical accidents could cause serious damage not only to accident areas but to residents and surrounding environments. It is hard to accurately predict the scope of damage as implications of chemical accidents linger for long time. To accurately assess the scope and degree of damage, it is required to conduct continuous monitoring of public health and environment in the accident site. To establish a scientific system capable of forecasting any potential damage from chemical spills, comprehensive measures are needed, covering from restoration procedures, roles of institutes concerned, specific implementation plan and institutional framework. However, currently in Korea, a wide array of countermeasures and response systems are in operation in case of chemical accidents while, there is no established management system to deal with the accidents. For this reason, this study suggested preliminary measures to introduce an environmental health risk assessment system to help investigate the environmental effects of chemical spills. The system consists of 3 stages: accident identification, confirmation of PBT under REACH and expert judgement. To confirm the type of chemicals in a prompt manner, 40 physiochemical properties and 78 hazard categories were suggested. Additionally, in case of investigating the environmental effects, implementation measures were divided into 15 stages from monitoring to completion of restoration works with the detailed plan on what should be done by which institutes at each stage.