J.S. Held expands EH&S and forensic engineering practices with the acquisition of Veritox, Inc. & GT Engineering. View press release.


Geophysical Surveys

Our geoscience geologists and engineering teams employ state of the art technology and industry standard methodologies.

Geophysical surveys are an integral part of any geotechnical investigation. J.S. Held's licensed geophysicists have conducted hundreds of geophysical surveys. Their experience includes detecting post tension cables, ground studies, sinkhole investigations, isolated utility locates, buried debris, void detection and delineation, archaeological services, and large-scale microgravity surveys.

Services Include:

  • Concrete Ground Penetrating Radar (GPR)
  • Crosshole Sonic Logging (CSL)
  • Electrical Resistivity for Grounding Designs
  • Electrical Resistivity Imaging (ERI) Surveys
  • Ground Penetrating Radar (GRP) Surveys
  • Litigation Support
  • Magnetic Surveys
  • Microgravity Surveys
  • Pile Integrity Testing (PIT) 

For Current Geology Licensure Info, Click Here.

Questions about this service, or any of J.S. Held’s services? Get in touch – we’re happy to help.

Contact Our Team