中文摘要：

由于地下水环境污染具有极强的隐蔽性和滞后性,尤其是滨海石化项目,其污染种类多、环境风险大、保护目标难确定,因此前期的地下水环境影响评价尤为重要。文章对滨海石化项目地下水环境影响评价中保护目标的确定、评价标准的选取、污染源的估算和保护措施的选择进行了探讨,并结合珠江入海口某大型石化项目的地下水环境影响评价,进行了案例分析,为类似地区的石化项目地下水环境影响评价提供可参考的经验。

英文摘要：

Owing to the concealment and retardation of groundwater contamination,especially for the petrochemical projects with the pollution characteristics as multi-type,high environmental risk,illegible protect-object,the assessment of original groundwater environment is important. Based on the analysis of the large-scale petrochemical project on the littoral zone of the Pearl River Delta,this paper gives the exploratory-discussion of the determination of the protect-object and assessing standard of groundwater environment,estimation of the contaminating sources and protecting measures. Some credible experience is also offered for the similar groundwater environmental assessment.