The COMAH (Control of Major Accident Hazards) Alarm and Quarterly Tests
In the unlikely event that a major incident occurs, a special Alarm, known as a COMAH Alarm, will be sounded which will be clearly heard outside the South Hook LNG Terminal.
The COMAH Alarm has a distinctive sound - an intermittent tone.
The ‘All Clear’ is a single continuous tone and this tone will be sounded when the incident is over.
With the exception of the test dates, this specific COMAH Alarm is only sounded if there is a potential danger to our local community.
The Alarms are regularly tested on the first Tuesday of the quarter. The tests occur at 2.30pm and again at 7.30pm.
Alarm Test Notices
Fridge magnets detailing the dates of the COMAH Alarm test are available.