the invention relates to a process for removing contaminants from contaminated soil with the aid of a stripping gas . in the process a biologically active layer is present in or on the soil . the process comprises the following steps : a ) there is created in the soil a medium whose resistance is lower than the resistance of the surrounding soil , b ) the stripping gas is injected in the soil at the depth of and / or beneath the contaminant , c ) the contaminants are volatized with the stripping gas , whereupon the stripping gas with the contaminants largely flows to the biologically active layer via the medium whose resistance is lower than the surrounding soil .