GGC finds out what’s beneath the ground without digging, providing rapid and noninvasive siteappraisal using innovative geophysical techniques to diverse targets. GGC provides full range of Professional geophysical services & consultancies for wide range of the following sectors:
GGC Provides Professional Services & Consultancies for Full Range of common Subsurface Objectives Including:
Solving specific engineering problems during site characterization, geotechnical investigation, and maintenance of highways using innovative geophysics and nondestructive test (NDT) methods.
Mapping Voids, Sinkholes, Abandoned Mines, and other Cavities using specific geophysical methods including resistivity (and conductivity), seismic methods, gravity, and Ground Penetrating Radar (GPR) depending significantly on the host geology, the depth and configuration of the voids.
Mapping bedrock depths, locate fractures and weak zones, map lithology and other subsurface features.
Determining Engineering Properties of the Subsurface including Vs30, Bulk Modulus, Young’s Modulus, Shear Modulus, and Poisson’s ratio, called elastic constants of a rock.
Determining the Rippabilityof Rocks that can be mechanically excavated. Rippability of rock is assessed by numerous parameters including uniaxial strength, degree of weathering, abrasiveness, and spacing of discontinuities.
Detecting Subsurface Utilities of pipe lines (natural gas, fuel, water and sewer) and cables of electric and telephone lines.
Detecting Underground Storage Tanks (UST) that are made from steel, fiberglass, and other materials. Tanks are usually buried with their tops a few feet beneath the ground surface. Pipes and other facilities may be connected to the tanks. They are also often buried in industrial areas where a significant amount of other metal is present.
Detecting Unexploded Ordnance (UXO) exists at current and former sites where the military has used an area for target practice or other activities. Depths of burial range from a few centimeters to a several meters for the air-dropped bombs. However, the vast majority of items are found to lie within a meter of the ground surface.
Mapping Groundwater Surface and Flow: The groundwater surface lies at depths ranging from the ground surface to many hundreds of feet depends on the geology of the area, topography, and precipitation. In sedimentary areas, the configuration depends on the type of sediments and their grain size. In hard-rock areas, the groundwater surface may exist in the alluvium above the bedrock. Groundwater may exist in fractures within the rocks, and a well-defined water table may not exist. Geophysical methods are most applicable to mapping the surface of the water table aquifer, although saturated fracture zones can also be detected..
Environmental Site Investigations “Mapping Contaminant Plumes “: Contamination plumes usually refer to plumes in groundwater. These can arise because of point sources, such as direct discharge of effluent from a pipe or from non-point sources such as the application of pesticides over a wide area, which then seep into the groundwater over time. In addition to contaminant plumes, geophysical methods are used to find buried trenches, landfill boundaries, and solve other environmental problems.
Archaeological Exploration: Geophysical survey techniques in archaeology seek to ascertain information about what lies beneath the surface without having to excavate. Common techniques are used to create an image which will hopefully tell us something about what lies beneath.
Hydrocarbon and Mineral Exploration: Hydrocarbon exploration (or oil and gas exploration) is the search by petroleum geologists and geophysicists for deposits of hydrocarbons. Areas thought to contain hydrocarbons are initially subjected to a gravity survey, magnetic survey, passive seismic or regional seismic reflection surveys to detect large-scale features of the sub-surface geology. Features of interest (known as leads) are subjected to more detailed seismic surveys to create a profile of the substructure. Mineral deposits usually possess physical properties that are different from those of the surrounding rocks. Explorers use scientific techniques called geophysical methods to measure these variations in physical properties of rocks (e.g. density, magnetism, electrical conductivity, natural radioactivity, heat capacity etc.) as a guide to the possible locations of mineral deposits.
Geological Studies: Advanced geophysical techniques are used to map detailed geologic structure, stratigraphy, topography, and rock types for multiple objectives.
Geohazards Assessment & Risk Analysis based on the seismicity and seismic microzonation for each specific region.
