Phase 2a Heritage Non-intrusive Surveys Report: Group 005 U&A Site 212 Geophysics survey report

The survey was undertaken using four Bartington Grad601 sensors mounted at 1m intervals (1m traverse interval) onto a rigid carrying frame. The system was programmed to take readings at a frequency of 10Hz (allowing for a 10-15cm sample interval) on roaming traverses (swaths) 4m apart. These readings were stored on an external weatherproof laptop and later downloaded for processing and interpretation. The system was linked to a Trimble R8s Real Time Kinetic (RTK) differential Global Positioning System (dGPS) outputting in NMEA mode to ensure a high positional accuracy for each data point, in accordance with EAC guidelines (EAC 2016). Survey at Site 212 has not identified any anomalies of definite or possible archaeological origin. Other than areas of magnetic disturbance recorded at the field boundaries caused by fencing or magnetic debris in the boundary itself, the only magnetic anomalies recorded in the survey are five linear anomalies identifying field drains. The findings of the survey are consistent with the known limited archaeological potential of the site and broader geographical area covering LS-WSI Group 005.