Over the two decades since its introduction into the United States, the CPT has now established its position as a routine, reliable, and expedient means for site characterization, stratigraphic profiling, evaluation of soil engineering parameters, and geotechnical design. The incorporation of additional sensors has increased cone versatility, thus favoring use of seismicgeophones, resistivity- or conductivity-, natural gamma-, and chemical-cones. This is attractive on geoenvironmental projects for expedient contaminant mapping while minimizing site damage and wastes generated from testing.