All fuel tanks must be cleaned regularly, otherwise the fuel quality is reduced.
- Fuel remnants are sucked into a clean chamber on the tanker, and then precipitates and sludge are sucked into the sludge chamber.
- The tank is completely emptied and aired out to substitute its atmosphere. Harmful, and sometimes flammable substances are sucked out of the fuel tank and replaced by clean air.
- Gas meters are used to verify that there is enough oxygen and no explosive gases left in the tank.
- The tank is cleaned and dried thoroughly.
- The last part of the process is to filter the fuel removed from the tank initially, to then release it back into the newly cleaned tank.
Diesel tanks should be emptied approximately every two years, fuel tanks somewhat less often.
In conjunction with tank cleaning, a tank condition assessment can also be performed. If the tank is approved, approvals that last 5-10 years are issued gladly. The owner is responsible for having the tank approved.