Gary Sandstrom home
Gary C. Sandstrom,
Geologist, LLC

Certified Engineering Geologist

Geotechnical Engineering Services

Site Explorations

Logging Geotechnical Borings and Test Pits – All stages of exploration project management process including:

  • Securing permits
  • Arranging sub-contractors
  • Performing utility locates
  • Logging excavations and collecting soil samples
  • Infiltration testing
  • Installation and reading of geotechnical monitoring devices
  • Drafting field maps and reports
  • Laboratory testing of samples
  • Drafting GInt logs, diagrams and reports

Geologic Reconaissance – Preliminary site screening to determine geotechnical exploration methods, suitability for planned development, etc.

Geologic Hazard Investigation (see Real Estate Services)

Construction Observation

Sub-grade soil and fill density testing – Certified by Troxler to perform nuclear density testing; experienced with nuclear density probe, proof rolling, ½-inch diameter steel T-bar and drive hammer.

Pile and Anchor Installation – Monitor and test installation of driven, drilled and auger-cast piles, soil nails, anchors, etc.

Other Installations – Monitor construction of retaining walls and drainage systems.


634 SW 54th St
Corvallis OR 97333

Cell 503-547-3678