Calcis is a contractor in engineering geophysics and offers engineering geological consultancy. These services are used to understand ground for construction projects. Geophysics (surface and borehole) and geotechnics are used to investigate the rock mass (presence of faults, cavities, karstic zones, loose materials, excavability, weathering and overburden thicknesses, man-made hazards …) for infrastructure and civil engineering projects before, during and after works. Our geotechnical consultants supervise on-site geotechnical investigations and operations to be carried out according to the state-of-the art, focusing on obtaining high quality results. Through geophysical results, it is possible to plan quarry layout and to have a great deal of understanding before excavation starts. It helps to estimate the production cost at very early stage. Geophysical methods are used to assess candidate geologic site for waste disposal, to detect and locate buried metallic objects in different geological environments. No single technique has been universally effective. Calcis combines, if necessary, different survey methods to achieve client objectives.