This type of tank is not visible to the naked eye; they are located underground usually beneath a car park basement, road or concreted area. As these tanks are not visible they are easily overlooked.

As outlined by the EPA “All practicable measures must be taken to prevent pollution of groundwater and pollution of land. This includes measures taken to prevent leakage of product from any UPSS (Underground Petroleum Storage Tanks) , irrespective of age.” - Publication number 888.4

The ramifications of not servicing/maintaining these kinds of tanks can be both environmentally and mortally damaging. Issues only become apparent once integrity tests have been performed. These tests can detect any leaks, rusting, corrosion or issues with the integrity of the tank or its context.

A leaking diesel tank may result in extensive contamination of the environment and subsequent clean up can be costly and time consuming.

During a tank test a fuel sample test is generally conducted, for more information on fuel sample tests, refer to the fuel sample page.