The surveys for the detection of contaminated soils must be carried out using protocols different specific action to geotechnical surveys, since on the one hand the witnesses must be removed so that its chemical composition remains unchanged, and the other perforated field can not It is altered by the drilling itself. Therefore, for the implementation of environmental surveys the following generic specifications are followed, to which one must add the specific technical requirements for each project:
Campaign surveys and installation of piezometers at gas stations.