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Voids in the underlying bedrock can be a major problem for developments. Using geophysics can help identify these features and significantly mitigate the associated risk and cost.

Phase have carried out a wide variety of geophysical surveys over the last six months including magnetic, electromagnetic, resistivity imaging, microgravity and low, medium and high frequency GPR surveys.

Geophysics, notably high frequency GPR (ground penetrating radar), can be invaluable in mapping rebar variations in above ground structures.

Phase SI used ground penetrating radar to successfully locate a number of masonry arch cellars beneath several footways.