Health Risk Assessment of Human Exposure to Fugitive Dust during Soil Excavation in a Dioxins and Mercury Contaminated Site
The objective of this study was to evaluate the potential health risks caused by human exposure to fugitive dust during excavation in a dioxins and mercury contaminated site, China Petrochemical Development Corporation (CPDC) An-Shun site, in Tainan, Taiwan. In the current study, soil excavated area of 2,500 m2 was assumed to be a potential dust source in future remediation works. Case-specific exposure parameters used in this evaluation conservatively assume that the nearby site worker will be exposed to contaminated dust. The computer models selected for this project are incorporated as modules in the American Petroleum Institutes Exposure and Risk Assessment Decision Support System (API-DSS). The equation developed by Cowherd was used in API-DSS for estimation of annual average emission rate of 10 microns in size or smaller (PM10) due to wind erosion. Gaussian Dispersion Model was used to estimate the concentration of chemicals downwind from the source. Estimated results show that cancer risks exceed the generally accepted benchmark of 10-6 within distance of 300 mon the downwind side of the dust source. The noncarcinogenic hazard index also exceeds the reference level of unity within distance of 100 m. From risk management point of view, the risk evaluation presented above indicates that the dioxin and mercury present in soils at CPDC An-Shun site may pose significant risks to human receptors potentially exposed via the fugitive dust media. A more extensive dust control plan should be undertaken to protect workers or population living in nearby areas.
Lee CW Chen HC Chao CC Lin KH Kung PY
Department of Safety,Health and Environmental Engineering,National Kaohsiung First University of Sci Sustainable Environment Research Center,National Cheng Kung University,Tainan
国际会议
北京
英文
1-6
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）