Amendment of the Human Health Risk Assessment Protocol for Soil and Groundwater Contaminated Sites
This study has focused on expanding the human health risk assessment (HHRA) application and on enhancing the framework of contaminated site management with regard to the Soil and Groundwater Pollution Remediation Act (SGPRA). To further strengthened the HHRA related system, several new guidelines were drafted. For the existing assessment protocol, the food-chain related risk assessment method was added to the HHRA Guideline and new functions were added to the risk simulation system. Thus, the tools for conducting HHRA under the SGPRA are improved. In order to provide information to practitioners about the procedure of conducting Tier 3 HHRA, two contaminated sites were selected and the case studies were completed. The results of these case studies should also exhibit the functionality of narrowing the gap between the HHRP protocol and practicing.
With respect to establishing a risk-based contaminated site management framework, this study has proposed a framework which would be able to assist authority to manage contaminated sites from discovery to closure based on risk. To make progress in risk analysis system, a risk communication guideline and a public involvement procedure were established. With the guidelines, the stakeholders and responsible parties will have a consistent reference when conducting a risk communication task. Furthermore, this has also integrated the risk communication with existing risk assessment framework and makes progress in establishing the risk analysis system for contaminated sites.
To steer the development of the risk assessment application under SGPRA, a roadmap for risk-based site management and risk assessment protocols was plotted out. The roadmap has collectively bring together opinions and suggestions from experts of related fields. The roadmap has explicitly connected the HHRA and contaminated site revitalization. It can not only be the vision for future development of the risk assessment and analysis system for contaminated sites, but also becomes a foundation of sustainable land use and brownfield program.
Human Health Risk Assessment;Tier 3 Risk Assessment;Risk Communication and Public Involvement