More than 25 years experience in the Sierra Nevada, the basin and Bay area working with geologists, utilities, excavators and construction  and homeowners

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We serve most areas of Northern California and have more than 25 years experience in the Sierra Nevada’s geologically difficult grounds.  We are also familiar with the basin and bay areas. We have worked with archaeologists, curators, geologists, excavators, construction managers, and historians.

We also have over 28 years experience in the construction field so we are familiar with underground utilities and concrete.

Our services include inspecting walls, floors, decks, slabs, tunnels, balconies and garages, locating rebar, tension cables, conduits, voids and measure slab thickness. We can detect and map the relative concrete condition for rehab planning, architectural Facade Inspections, bridges, airports and 3d mapping of interior obstructions.   

Ground Radar is the only non-destructive technology that can identify non-metallic as well as metallic subsurface utilities. It is suitable for the location of services including water, sewer, gas, electric, telephone and fiber optic. By identifying the location of all services prior to construction and excavation works, the risk of costly damage and the safety hazard to workers can be minimized.

Concrete Mapping

Ground Radar can map rebar and locate voiding
Ground Radar can be used to inspect concrete floors, walls, decks, slabs, tunnels, balconies, warehouses and garages. It can locate rebar, tendons, conduits, voids and measure slab thickness. In most cases, this can be achieved with access to one side of the concrete element only. It is often essential to know the position of obstructions in the concrete before drilling, cutting or coring.

Underground and In-Slab Utility Identification - Rebar/Post Tensioning Cable Identification - Grade Beam Identification -
Void Detection Under Slabs - Buried Foundation Design - Concrete Slab Thickness

Septic Tank Location
Sierra Nevada GSI can locate septic tanks either in use or abandoned saving perhaps thousands of dollars of un-necessary digging with a backhoe to minimize property damage and risk of harming other underground services such as water lines or buried cables.

Roads, Runways and Pavement Surveys
Ground Penetrating Radar can determine pavement thickness (asphalt and concrete), detect voids underneath the road pavement, identify debonding between layers and determine layer thickness. GPR is also a useful technique in surveying road reinstatement.

Buried Objects
GPR can be used to locate underground storage tanks (UST), grave location, forensic investigations and a wide variety of other buried objects.

Hazardous Waste
Having successfully located buried pipes, drums and underground storage tanks, Ground Radar can, under the right conditions, be used to identify the extent of any leakage and contamination. Likewise, the extent of landfill sites can also be determined.

Foundations
Ground Radar is a useful tool for the location, investigation and determination of the extent of footings and foundations. The number of trial pits required to determine foundation and footing detail can be greatly reduced, saving both time and money.

Archaeology
Using Ground Radar to map the subsurface, the location of possible archaeological artifacts, bones, etc. can be identified.

Company’s we have worked with: