Abstract: In recent years, with the increase of contaminated site restoration projects, the depth of the contaminated site remediation has also shown an increasing trend, and the deep excavations involved in remediation and treatment have become deeper and deeper. However, the content and depth of the hydrogeological survey carried out during the preliminary environmental survey often do not meet the design and construction requirements of the deep excavation engineering in the later stage of the restoration and treatment. Therefore, there are more and more demands for the special environmental geotechnical surveys for the contaminated site remediation projects. Using the relevant specifications, combined with a specific engineering example in Shanghai, the main work content of the special environmental geotechnical survey for the restoration project of the contaminated site is introduced, the precautions and some problems encountered during the survey work are discussed and analyzed, some reasonable evaluations and suggestions for the project are put forward, some special survey experience are summarized, which can be used as a reference for subsequent special environmental geotechnical surveys for similar contaminated site restoration projects.

Key words: Contaminated Site Remediation, Environmental Geotechnical Engineering, Survey