title: [Case study on health risk assessment based on site-specific conceptual model].
abstract: Site investigation was carried out on an area to be redeveloped as a subway station, which is right downstream of the groundwater of a former chemical plant. The results indicate the subsurface soil and groundwater in the area are both polluted heavily by 1,2-dichloroethane, which was caused by the chemical plant upstream with the highest concentration was 104.08 mg.kg-1 for soil sample at 8.6 m below ground and the highest concentration was 18500 microg.L-1 for groundwater. Further, a site-specific contamination conceptual model, giving consideration to the specific structure configuration of the station, was developed, and the corresponding risk calculation equation was derived. The carcinogenic risks calculated with models developed on the generic site conceptual model and derived herein on the site-specific conceptual model were compared. Both models indicate that the carcinogenic risk is significantly higher than the acceptable level which is 1 x 10(-6). The comparison result reveals that the risk calculated with the former models for soil and groundwater are higher than the one calculated with the latter models by 2 times and 1.5 times, respectively. The finding in this paper indicates that the generic risk assessment model may underestimate the risk if specific site conditions and structure configuration are not considered.
authors.affiliation: Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China. zzmmss1986@126.com
authors.forename: Mao-Sheng
authors.initials: MS
authors.lastname: Zhong
authors.forename: Lin
authors.initials: L
authors.lastname: Jiang
authors.forename: Jue-Jun
authors.initials: JJ
authors.lastname: Yao
authors.forename: Tian-Xiang
authors.initials: TX
authors.lastname: Xia
authors.forename: Xiao-Ying
authors.initials: XY
authors.lastname: Zhu
authors.forename: Dan
authors.initials: D
authors.lastname: Han
authors.forename: Li-Na
authors.initials: LN
authors.lastname: Zhang
mesh_terms: D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D004785:Environmental Pollutants / Q000032:analysis*; D004787:Environmental Pollution / Q000032:analysis / Q000706:statistics & numerical data*; D005025:Ethylene Dichlorides / Q000032:analysis; D007220:Industrial Waste / Q000032:analysis; D008962:Models, Theoretical; D011634:Public Health; D018570:Risk Assessment
chemical_list: D004785:Environmental Pollutants; D005025:Ethylene Dichlorides; D007220:Industrial Waste; C024565:ethylene dichloride