This study provides an example of fault structure delineation using both geophysical measurements and soil-gassurveys. Seismic refraction and electrical resistivity tomography investigations were performed in combination with DirectPush (DP) soilgas concentration measurements, with the main objective being the characterization of an assumed permeable fault structure which is covered by sediments that are over 20 m thick. Geophysicalmethods were used to locate a potential faultzone and to provide an insight into the structural features of the covering sediments. Methods for quantifying the soil-gas concentration were applied to evaluate the permeability of the faultzone. The positioning of gas sampling points was based on results of a geophysicalsurvey undertaken beforehand. Gas sampling was performed using DP-technology to obtain concentration profiles for the inert gas Radon-222 and its carrier gas CO₂ along the profile at different depths. Joint interpretation of the spatial distribution of geogenic gases and results from the geophysicalsurvey allowed us to produce a representative model image of the fault structure consisting of two fault branches. Based on this image, it was possible to interpret the observed gas concentration patterns.