Subsurface Explorations and Instrumentation
We subcontract with drilling firms that are local to the projects we serve, and we can utilize drilling companies that specialize in the actual work to be performed (rig type, advancement method, access constraints, schedule). Depending on the anticipated subsurface conditions and proposed construction, the subsurface exploration generally consists of standard geotechnical drilling but is supplemented by Cone Penetrometer Testing (CPT), geophysical surveys, and other methods. In addition to collecting subsurface soil and bedrock data, the use of instrumentation (piezometers, slope inclinometers, surface monuments, borehole camera surveys) is another method to establish relevant subsurface information.
More than 30 of our geologists and engineers are trained test boring inspectors, of which over 20 are OSHA HAZWOPER certified. Their training includes shadowing our experienced geologists and engineers during test boring inspection and assisting in our soil laboratory to better understand the important characteristics in performing field identification of soil and bedrock.