What might be required for tanks buried deeper than their diameter?

For tanks that are buried deeper than their diameter, reinforcements as specified by the manufacturer are typically required. This is because deeper burial can increase the pressure exerted on the tank from the surrounding soil, particularly during installation or due to ground movement. Manufacturers often provide specifications based on engineering principles that ensure the integrity and safety of the tank under these conditions. Adequate reinforcement is necessary to help withstand external pressures, prevent deformation, and maintain the structural integrity of the tank over time. This is a critical aspect of ensuring the safety and functionality of underground storage systems.