Underground technology The company identified a niche in the market to provide low cost site investigation works for underpinning claims together with the smaller associated repairs for drains and the like. The following disciplines are covered: Excavation of trial pits to expose foundations Hand auger sampling Drain pressure tests CCTV of drains Soil testing and root analysis Structural lining of drains using "no dig" technology Drainage repairs by excavation Associated enabling and reinstatement works Effects scheme