A process for the decontamination of soils

The invention relates to a method for decontaminating contaminated soils in a related decontamination field (15) by introducing dosing materials (4) promoting autochthonous biocenosis into the saturated soil area (1) through injection holes (5) in superstructed decontamination fields (15) or decontamination fields covering a wide area. In order to avoid high expenditures and possible problems linked to washed-out contaminated materials, the invention provides for the following: the direction (F) and velocity of flow of the ground-water is determined in the saturated soil area (1); dosing materials (4) are hermetically introduced through the injection bore holes (5) in such a concentration so that an effective dilution is solely obtained with the ground-water in the saturated soil area (1) and the dosing materials (4) are only transported with the flowing ground-water; the injection bore holes (5) are disposed in the direction of flow (F) at distances which take into account the velocity of flow of the ground-water, thereby enabling the entire decontamination field (15) to be injected in specific places over a given time period and thus be substantially provided with dosing materials (4). The dosing materials (4) are preferably introduced by means of mobile dosing stations (6).