Pyramid Geophysical Services conducted a geophysical investigation across a proposed apartment complex property in Charlotte, NC. This survey was performed to determine average shear wave velocities in the upper 100 feet of the subsurface to provide seismic data to the client for the purposes of determining a seismic … [Read more...]
Geophysical Mapping of Sand Unit Thickness
Pyramid Geophysical Services was contracted to perform an electrical resistivity geophysical mapping survey across 230 acres of undeveloped land in North Carolina. The purpose of the survey was to quantify the lateral extents and approximate depth/thicknesses of sandy soils near the ground surface. The client was … [Read more...]
3D Modeling of Electrical Resistivity Data
Electrical resistivity (ER) testing is an effective geophysical method to identify subsurface geologic hazards, stratigraphic variability, karst features, and hydrogeologic conditions. A typical single ER test utilizes an array of electrodes placed in a straight line at a consistent spacing across a target area. This … [Read more...]
Ground Penetrating Radar to Map Septic Leach Field Drainlines
Pyramid Geophysical Services has utilized ground penetrating radar (GPR) to locate and delineate the extents of septic leach fields and septic drain lines at a variety of locations. Typically, these drain field systems are constructed by digging trenches in the ground where perforated drain lines are placed and then … [Read more...]
Landfill Delineation
North Carolina contains hundreds of properties that served as landfill sites in the past; these former landfills have long since been inactive, and many of the sites are overgrown with no specific knowledge of the extent of the buried waste. In North Carolina, the Department of Environmental Quality (DEQ) has … [Read more...]
