Abstract
The age of vertical steel tanks (oil tank) in oil companies 20 – 30 years. Periodic inspections shall be carried out to prevent tank failure. Periodic levelling is carried out to prevent a reservoir from falling due to precipitation. The technical solution consists in eliminating the uneven precipitation. The bottom of the reservoir is levelled by lifting said reservoir with jacks which can be mounted directly in special niches. The main advantages of the new design are low equipment costs, reliability of the used tank design and long-term operation without foundation sludge. This construction represents a really rational approach to solving the problem of foundation sediment.