Beach Energy (Operations) Limited (Beach), proposes to undertake geophysical and geotechnical surveys within the Trefoil (T/RL2) and Yolla (T/L1) permits and along a future pipeline route in Commonwealth water open acreage, Bass Strait. These locations are approximately 126 km from Wonthaggi, Victoria and 94 km from Stanley, Tasmania. The surveys are required to assess seabed properties for potential development of the Trefoil gas field.

This Environment Plan allows for surveys to be undertaken either separately or together any time between December 2021 and 31 December 2023. Exact timing is contingent on the availability of suitable vessels, weather and the receipt of required environmental approvals.

The geophysical survey could take up to 25 days to complete and includes:
• multibeam echo sounder
• side-scan sonar
• sub-bottom profiler
• magnetometer

The geotechnical survey could take up to 30 days to complete and includes:
• borehole sampling
• core sampling
• piezo cone penetrometer test
• visual observations by drop/towed camera