This method involves passing an electrical current through the ground via metal probes and measuring the resistance to that current
Rocks provide a high resistance to electrical current whereas wet soils provide an easy passage for the current to flow
The further apart the probes are the deeper the penetration
This is the 21st century approach to site investigation
Subsoil conditions would be checked and foundation design would be based on this without the requirement of costly machines digging holes .
The Geologist’s Report would be included in the cost of the future found system if requested.