Terratest is the leading site investigation drilling company on the East Coast. We operate a fleet of rigs from our bantam we ... ight XC 100 to our largest rig, the Sonic SDC390. Established in Sydney, over 50 years we have expanded to now also operate out of Brisbane, Coffs Harbour, Newcastle and Melbourne. We offer industry leading drilling capability that never sacrifices safety for speed. We have specialist operators for the followings methodologies: Geotechnical Environmental Difficult Access Sonic Drilling CPT/HPT Acoustic Televiewing Non-Destructive Digging Resource Drilling Exploration Drilling read more