The Electromagnetic method is based on the induction of electrical currents in subsurface conductors by electromagnetic waves which are generated on the surface. Applications include mapping seepage through dams, levees, pipelines, or containment walls.  It can also be used to delineate the edges of landfills or to detect buried objects such as utilities, rebar-reinforced concrete structures, or underground storage tanks. Time Domain EM and Frequency Domain EM methods can be examined in more detail in this section. Included are short descriptions of each method, and the applications for each method.

For more information on any of these methods, including unusual applications, please contact our office.