- A-frame percussive drill
- Drill and hole, arrowed
- Capped pipe
Oxford FAS ground investigations: a borehole being drilled this afternoon in South Hinksey.
The A-frame percussive drill dug 9 metres down, below the alluvial layer, the gravel layer and 5 metres into the clay.
The capped pipe is a monitoring site where the changes in ground water depth over time can be observed.