ICI has been undertaking a limited dewatering programme at its Penrice Quarry since mid-1978 to allow quarrying of the 4th level (EL 327 m). Monitoring carried out for the programme has included recording of the groundwater levels in wells drilled...

At the instigation of JLC Exploration Services, geological consultants to Penrice Soda Products Ltd, vertical electrical soundings (VES) were used to determine overburden thickness.