T/CAQI 319-2023 Guidelines for Fine-tuning the Characterization of Groundwater Contamination and Stratigraphic Heterogeneity in the Site

Scope

Main technical content: This document specifies the technical requirements for the application of non-disturbing geophysical exploration methods, direct push micro-drilling-membrane interface exploration methods, and needle trap micro-extraction-gas chromatography, etc., to precisely characterize the shallow layer (depth less than 50 m) of groundwater pollution and stratigraphic heterogeneity in sites. It is applicable to the detailed mapping of high-concern pollutants such as heavy metals and petrochemical organic compounds in typical groundwater contamination areas, including leaks of wastewater and waste residue from typical factories, oil spills from oil pipelines or gas stations, and leachate infiltration from landfills. It also includes the detailed characterization of shallow-layer geological structures, stratigraphic heterogeneity, and aquifer distribution (hydrological) geological background in these sites.

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