Drilling Services


GTA routinely provides subsurface exploration services to clients in the Mid-Atlantic, Southeast, and Midwest regions.
GTA’s subsurface exploration division provides conventional test borings, cone penetrometer soundings, and monitoring well installations. Drilling areas of specialization include:

Drilling Services

  • Standard Penetration Test (SPT) Borings
  • Auger and Mud-Rotary Drilling
  • Monitoring Well Installation
  • Rock Coring
  • Shelby Tube Sampling
  • Concrete & Asphalt Coring
  • Well Rehabilitation
  • Well Abandonment
  • Water Supply Well Testing and Drilling (subcontracted)
  • Rock and Soil Packer Testing

Instrumentation Installation

  • Inclinometers
  • Vibrating Wire Piezometer
  • Rod and Magnet Extensometers

In-Situ Testing

  • Electronic Cone Penetrometer Testing (CPT)
  • Seismic Electronic Cone Penetrometer Testing (SCPT)
  • Dilatometer Testing (DMT)
  • Rock and Soil Permeability Testing
  • Yield Testing for Municipal, Commercial, and Industrial Wells
  • Infiltration Testing
Standard Penetration Test Borings
Electronic Seismic Cone Penetrometer Testing
DMT Soundings