Environmental/Geophysical
GPR radar can distinguish differences in layer densities and material properties such that thicknesses of the layers can be determined over spatial areas
•Sand/gravel layers
•Base/Subbase Layers
•Bedrock mapping
•Groundwater mapping
GPR can be easily used to identify features associated with septic systems.
•Bright targets result when the difference in the dielectric properties of the adjacent materials is high
•Soil density & moisture differences are also visible, generally at interfaces
•Signal polarity infers target material type i.e. steel vs pvc pipe
Dielectric Properties of Selected Materials
•Sand (dry) 4
•Sand (wet) 30
•Silt/Clays 6-12
•Granite 5
•Water 81
•Steel “Refl”
•Air 1
•“Poly” Pipe 1-3
•“Concrete” 6-9