Geophysical Surveying

  STS offers a comprehensive suite of geophysical services for a wide variety of subsurface investigations. The non-intrusive nature of each method promotes fast, cost-effective data acquisition over large areas. A brief description and typical applications of each survey technique are listed below.

Electromagnetic Surveying (EM)
  • Provides Ground Conductivity and In-Phase Data
  • Detects Buried Drums, USTs and Utilities
  • Locates Bedrock Fractures and Sinkholes
  • Delineates Saturation and Contamination Zones
Magnetic (Gradiometer) Surveying
  • Provides High-Resolution Data on Buried Ferrous Sources
  • Detects Debris, USTs and Utilities
  • Geologic Mapping of Dikes and Faults
  • Delineates Landfill Boundaries
  • Non-Intrusive Mapping of Archeological Sites
Seismic Refraction and Reflection
  • Provides High-Resolution Stratigraphic Mapping
  • Investigates Large Depths
  • Determines Bedrock Rippability
  • Estimates Blasts Volumes
  • Describes Bedrock Structures
Electrical Resistivity
  • Provides Measurements of Resistivity at Discrete Depths
  • Maps Unconsolidated Sediments
  • Determines Lateral/Vertical Extent of Contaminant Plumes
  • Describes the Azimuthal Orientation of Bedrock Fractures and Faults
  • Detects Dam Leakage
Ground-Penetrating Radar (GPR)
  • Provides Real-Time Data Interpretations and Characterization of Subsurface Anomalies
  • Delineates USTs, Underground Utilities and Septic Systems
  • Characterizes Geologic Voids, Faults and Fractures
  • Locates Groundwater Contamination
  • Maps Groundwater Topography
Gravity Surveying
  • Provides Depth, Thickness and Lateral Extent of Subsurface Features
  • Determines Landfill Thickness
  • Delineates Faults and Fractures
  • Locates Buried Bedrock Valley Systems
  • Maps Karst Terrains