TerraDat products

Soil Vapour Surveys are an integral tool for the location of contamination “hotspots”. They are used as an aid in determining the nature and extent of contamination at a site. The soil vapour survey confirms the presence of vapours in the subsurface environment and can serve as a guide in decided upon locations for intrusive investigations.

The Magnetic survey technique is based on mapping localised variations in the Earth’s magnetic field caused sub-surface magnetic materials which range from naturally occurring magnetic minerals to man-made ferrous objects. This leads to a wide range of applications from small-scale archeology and engineering surveys to detect buried metallic objects, to large-scale surveys carried out to investigate regional geological trends or mineralisation.

The EM-61 is based on the time-domain electromagnetic technique which enables the instrument to discriminate between moderately conductive earth materials and very conductive metallic targets.

The problem of characterising both active and closed landfills and waste sites is an increasing one in the light of increasing environmental legislation and poor historical records. A TerraDat geophysical survey can be rapidly carried out for a fraction of the cost of obtaining low-resolution information through invasive means, without disturbing the ground.

In many regions, mining activity has left a legacy of bell pits, shafts, adits, or subsidence which have a significant influence on present day developments. The majority of mining activity is well documented, but in some cases the accuracy of this information can be questionable.