- The technician will ensure the vehicle is safely positioned and is OFF before exiting the vehicle.
- The technician will identify himself to the contact person at the site and obtain a safe-work permit.
- A tail-gate meeting will be held with all concerned parties to explain the test procedure and gain specific site information.
- The vessel to be tested will be identified and appropriate safety measures will be taken, such as H2S, LEL and O2 levels.
- Ensure that the vessel is shut in from any operating systems.
- The tank must be filled beyond its maximum capacity: i.e. – the liquid level must be above grade to ensure that the entire system is under hydrostatic pressure.
- The test equipment is introduced into the system through a riser of no less than 5cm internal diameter.
- The minimum duration for this leak test is approximately one (1) hour depending on the system capacity.
- At the conclusion of the test, the technician will remove all test equipment and return the safe work permit to the originator or their designate.
- The vessel may then be returned to normal service or remedial action taken.
- A written report will be provided.
Reviewed Oct 31/16
Typical Underground Storage Tank