Demonstration of using crossed dipole GPR antennae for site characterization

Crossed dipole (cross-pole) and parallel dipole (co-pole) GPR data were acq uired at an industrial site that formerly operated as a creosote wood treat ing facility in order to locate buried pipes and tanks or other possible co ntaminant-filled subsurface structures. Cross-pole data are not typically c onsidered during GPR field studies, but proved essential for accurate site characterization at this location, as, images produced using co-pole data h ad a poor signal to noise ratio. Data interpretations were confirmed throug h exploratory trenching conducted subsequent to this study. The GPR data pr oved successful in locating back-filled trenches that contained creosote-fi lled drainage tile, as well as vaults and a pit filled with pure creosote p roduct at the site.