The dissertation presents a hydrogeological survey of an experimental site from Barreiras Formation. On this site, located in the municipality of São Sebastião do Passé (BA), a site investigation was carried out consisting on auger drilling, construction of monitoring wells, hydraulic conductivity tests, sample collection a and a geophysical survey by GPR (Ground Penetrating Radar). The experimental program held at the Geotechnical Laboratory sought to characterize the mineralogical and geotechnical properties of the materials collected. It was found that the profile of the site has a series of materials arranged in thin layers. Although the materials present similar mineralogical constitution, its particle size distribution and its consistency limits are considerably different. No direct relationship was found between porosity and hydraulic conductivity, however excellent relationships were found between the hydraulic conductivity and the fines contents, the clay fraction, the coarse fraction, the liquid limit and plasticity index. A geological model was obtained from data obtained from the drillings, the monitoring wells and the geophysical survey. The model revealed that the spatial distribution of the different materials is not uniform since the location of the layers and their thickness varies along the profile.