People do ask. Why subsoil investigation and what are its benefits? Well, to a geologist subsoil investigation entails detailed study of the texture, structure and mineralogical composition of soils/rocks within the subsurface in other to reveal its load carrying capacity and d possible effect of emplacing engineering structure on it. hence it has the importance of preventing building collapse and other structural defects due to differential settlement. we have two major methods. 1 GEOTECHNICAL(CPT and SPT) 2. GEOPHYSICAL MTHD. for more detail info on consultancy services, contract award and execution. SEGUN 08023672284 or geosegun234@yahoo.com