关键词: 土壤, 污染, 调查, 城镇住宅用地

Abstract: In order to clarify the soil pollution status of a certain construction land，ensure the envi‐ ronmental safety of the subsequent development of urban residential land，and provide a scientific and reli‐ able environmental basis for the decision-making of land development and utilization，a systematic investi‐ gation and research on soil pollution status is carried out in view of the core problems of unclear soil pollu‐ tion base number and inability to support development and approval.By using the pollution investigation and identification method of data collection-personnel interview-field survey，56 monitoring points are set up in the plot by using the system layout method，and 3 external control points are added to improve the ac‐ curacy of the results.In the detection stage，X-ray fluorescence spectrometer (XRF) is used to quantitative‐ ly detect heavy metal indexes such as lead，cadmium and mercury in soil，and photoionization detector (PID) is used to monitor the concentration of volatile organic compounds (TVOC). On-site sampling and lab‐ oratory detection and analysis are carried out in strict accordance with relevant technical specifications.The results show that the content of heavy metals in all monitoring sites meets the requirements of relevant stan‐ dard limits，the concentration of TVOC is lower than the detection limit，and the over standard rate of soil pollutants is 0. The soil environmental quality of this plot is good，which fully meets the requirements of environmental access for urban residential land development.At the same time，targeted suggestions such as dynamic monitoring of soil environmental quality and formulation of pollution prevention and control plans during the development of plots are proposed，which provides a reference for the subsequent develop‐ ment and utilization of plots and environmental management.

Key words: soil, pollution, survey, urban residential land