ScanTec personnel have carried out commercial and research surveys for:
- Landfill sites
- Mine tailings sites
- Petroleum contaminated sites
- Woodwaste contaminated sites
- Military - contaminated sites
- Saline intrusion
Geophysical techniques can be used to detect:
- contaminant plumes
- local geology (eg bedrock or aquitard depth)
- preferrential groundwater paths
- contaminant source material (drums, waste, ore)
ScanTec use the latest geophysical techniques and equipment available including:
- Ground Penetrating Radar (GPR)
- Multi-electrode geo-electrical sounding (resistivity)
- Electromagnetic methods (surface and borehole)
- Magnetics
- Gravity
- Seismic reflection / refraction
(Above) Dielectric permittivity and electrical conductivity measurements of contaminated soil using a Percometer.
The example below shows GPR data collected at a contaminated mine site in New Zealand showing a clearly defined leachate channel (heavy metal content / pH~3). The signal is strongly attenuated due to the conductivity of the leachate, to form a "shadow zone". (Watson et al, 2001)
