The G3 Group hs developed patent pending Multi-Electrode Resistivity Implant Technique (MERIT) for geophysical technique. MERIT represents a significant improvement of surface geophyiscal methods. MERIT ability is very borad range and it is robust with systems installed over 3 years and counting. Applications include: Sinkhole identification, Rock profiling for pile length , determinations, Seepage investigations for Dams and Levees, Unknown foundations