There are now four well heads on Surtsey. These cap the 1979 hole, the two vertical 2017 holes, and the 2017 inclined hole. All materials brought to Surtsey by the SUSTAIN operation (apart from casing in drill holes) have been now been safely taken off the island. On Monday, more than 50 loads were slung to Thor in four hours. On Tuesday morning the helicopter did the last six loads. The Palsbaer Hut was cleaned and made ready for winter. The last people departed with the Coast Guard helicopter to Reykjavik, leaving Surtsey again pristine and at peace.