Introduction
The importance of accurate information and interpretation of soil conditions on a site cannot be understated. The chosen form of any sub-structure is entirely dependent upon what the site investigations have revealed. It is typically up to the structural engineer, with the aid of geotechnical engineers and specialists, to determine the extent of this investigation and interpret its results. This Technical Guidance Note explains the various methods of site investigation and can be considered a partner to the previously published note on 'soil bearing capacity'.