综合修复与风险管控技术在加油站污染场地管理中的应用

Application of Integrated Remediation and Risk Control Technology in Management of Contaminated Gas Station Site

长江经济带某加油站部分区域土壤和地下水受到了苯系物和总石油烃的污染,并且地下水污染已经迁移至场界外围区域。在场地下游边界处安装地下水拦截沟,采用竖直井多相抽提技术同步协同修复土壤和地下水污染;在加油站内人员经常活动的区域采用水平井土壤气相抽提技术管控土壤气体侵入风险。经过数年的修复与风险管控系统运行,地下水中污染物质量浓度均低于或接近修复目标值,证明上述综合技术对加油站污染场地具有良好的修复和风险管控效果。

Soil and groundwater in some areas of a gas station in the Yangtze River Economic Belt were contaminated by benzene and its analogies and total petroleum hydrocarbons. The contaminated groundwater had migrated to the periphery of the site. Groundwater intercepting trench was installed at the downstream boundary of the site. Multi-phase extraction with vertical wells was also adopted to remediate the contaminated soil and groundwater synchronously and cooperatively. Soil vapor extraction with horizontal wells was applied to the areas with frequent personnel activities in the gas station to control the risk of soil vapor intrusion. After years of operation of the remediation and risk control system, the concentrations of groundwater contaminants reached or approached the target remediation values, proving that the integrated technology had a good effect on remediation and risk control.