某在产企业土壤污染风险评估与风险管控研究

Study on Risk Assessment and Risk Management of Soil Pollution in an Operating Enterprise

摘要:

以某在产企业土壤地下水污染为研究对象，开展人体健康风险评估工作。对污染源区面积、污染源区宽度、封闭空间体积/渗透面积比、密闭空间空气交换频率、致癌效应的平均时间等参数结合实际情况进行了调整。风险评估结果表明：土壤和地下水中二氯甲烷对企业员工的健康风险不可接受，需开展管控修复；室内暴露途径是影响人体健康的主要途径；可采取制度控制和工程控制等措施，对密闭空间空气交换频率、成人暴露期、室内暴露频率、封闭空间地下基础层厚度、基础和墙体面积中裂隙部分所占比例等敏感性参数进行调控，降低人体健康风险。

Abstract:

Taking the soil and groundwater pollution of an operating enterprise as the research object, the risk assessment of human health is carried out. Combined with the practical situations, the parameters such as pollution source-zone area, width of pollution source zone, enclosed spatial volume / infiltration area ratio, air exchange rate of enclosed space, and average time for carcinogenic effect are adjusted. The risk assessment results indicate that the health risk of dichloromethane in soil and groundwater to enterprise employees is unacceptable, and the remediation and risk control measures need to be taken. The indoor exposure pathway is the primary route affecting human health. The institutional and engineering control measures can be taken to regulate the sensitive parameters, including air exchange rate of enclosed space, exposure duration of adults, indoor exposure frequency of adults, thickness of enclosed-space underground foundation layer, and proportion of the cracked parts in the area of the foundation and walls, thereby reducing health risks to humans.