Fire crews have been stood down after they were called out to Manx Petroleum premises on Battery Pier, Douglas, following a report of a possible gas leak from one of the tanks.
Three pumps, an aerial ladder platform and a foam carrier were sent out from Douglas station and the area was cordoned off from the harbour swing bridge.
A Fire and Rescue Service spokesman said: ‘All crews have now been stood down from the alarm operating at Manx Petroleum’s, a gas alarm has activated due to vapours from a spirit tank.
‘A full check of the tank and the systems show that there was no leak but due to the current climatic conditions no air movement in the area, vapours have built up in the bund area to activate the alarm.
‘The emergency procedures for the area worked well.’