We offer a wide range of geophysical methods for determining the site seismic category (V̄s30) according to the requirements of the National Building Code, as well as for measurements of seismic shear wave velocities. With the help of specialized interpretation software tools, our experts produce reliable and fast V̄s30 results. The constraints specific to each site, the geological and geotechnical contexts, the requirements of the project and the geophysical principles on which each method is based dictate the choice of the best technique to use.