Spectrum Geophysics specializes in the subsurface characterization of industrial, military, and urban settings for environmental and engineering projects. Survey goals include: utility location and mapping, boring and trench site investigations, UST and oil well searches, ground penetrating radar (GPR) investigations, delineation of geologic faults/fractures using seismic or electrical resistivity methods, depth to bedrock using seismic refraction , shear wave velocity profiling using ReMi and MASW, electrical resistivity (ERI) and TDEM methods for groundwater applications, and electromagnetic methods for landfill delineation.