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.