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Groundwater pollution remediation project should generally include three steps: First, groundwater contaminated sites survey; then, groundwater pollution assessment; Finally, the selection of appropriate groundwater pollution repair techniques, repair treatment.
(A) groundwater contaminated sites investigation
1, groundwater contaminated sites hydrogeological survey
Hydrogeological survey of contaminated sites is the basis and starting point of groundwater pollution research. Its main purposes are: to detect and identify underground pollutants, to determine the concentration of pollutants, to ascertain the transport characteristics of pollutants in groundwater systems, to determine the flow direction of groundwater and Rate, identify the main runoff direction and the factors that affect the transport of pollutants, and quantitatively describe the hydrogeological parameters that control groundwater flow and pollutant transport.
The main steps of hydrological survey of contaminated sites:
â‘ preliminary site survey and initial assessment
The main work includes the collection and collation of existing data, on-site reconnaissance and the establishment of a preliminary conceptual model of hydrogeology.
â‘¡ preliminary field investigation
Major tasks include initial monitoring holes, aquifer generalization and other field work.
â‘¢ detailed site investigation and experiment
The main work includes the expansion of detection of pore network and sediment sampling; access to hydrogeological parameters, assessment of pollutant transport.
â‘£ prepare a report
The main tasks include drawing plane and section flow networks, setting out important parameter values, summarizing (reporting), and arranging future monitoring.
2, groundwater pollution investigation
The investigation of groundwater pollution investigation mainly includes determining sources of pollution and ways of pollution, determining the scope of investigation and designing groundwater pollution monitoring network, sampling and storing groundwater, conducting on-site analysis and monitoring, and finally recording and sorting out the relevant chemical data.
(B), groundwater pollution assessment
According to the survey results, select the appropriate evaluation model, evaluation methods and evaluation criteria for groundwater pollution assessment, and according to the actual preparation of the evaluation report form or report.
(Three), groundwater pollution repair
According to the status of groundwater pollution, select the appropriate repair technology.
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