Gregg carries out all CPT using an integrated electronic cone system.
The cone takes measurements of tip resistance, sleeve resistance, and penetration pore water pressure. Measurements are taken at either 2.5 or 5 cm intervals during penetration to provide a nearly continuous profile of subsurface conditions. CPT data reduction and basic interpretation is performed in real time facilitating on‐ site decision making. Field data is followed up with final interpretation and reporting that is subject to a rigorous QA/QC process led by our senior technical advisor. All CPT soundings are performed in accordance with revised ASTM standards (D 5778‐12).
Gregg CPT systems are designed and manufactured in-house and are all fitted with seismic geophones. Gregg can deploy a variety of cones to meet the needs of our clients’ projects. Gregg has extensive marine experience and has tools capable of remote seafloor seismic signal source generation to collect sCPTu data.