Evaluation by C Champness of OAS (SU 934 376–931 361). The aim of the exercise was to assess the likely impact on archaeological horizons of a programme of seismic testing proposed in the area. Small charges were detonated at the base of 2m deep auger holes to mimic the proposed seismic test, and the area then excavated to examine the damage caused by the explosives. Two excavations revealed that the blast created a crater c 0.6–0.7m in diameter. Given the geology of the general area and the proposed depth of the seismic charges, it was concluded that the survey would be unlikely to impact significantly on any archaeological deposits that might be present.