It is possible to perform an annual retro-test on live sites. This provides maintenance crews with a quick method of leak detection, allowing them to fix problems quickly without costly site closures.

Either Fibrelite distributors or trained contractors will be nominated by oil companies to perform testing. The contractor will charge for testing on a site by site basis. Testing is conducted until a pass is achieved. The contractor will then issue a dated and signed certificate with detailed information of testing performed on the site. This is the customer’s guarantee that sumps have been tested and are verified to be liquid-tight.