Why is it important to use tie-down straps or Deadman anchors when installing a UST?

The importance of using tie-down straps or Deadman anchors when installing a UST primarily revolves around the prevention of tanks from floating out of the ground, especially in scenarios where the groundwater level is high. Floating occurs when the buoyant force exerted by groundwater exceeds the weight of the underground storage tank. This situation can happen, for instance, when there is significant rainfall or flooding, as the water level surrounding the tank rises.

By securing the tank with tie-down straps or Deadman anchors, operators ensure that the tank remains adequately anchored to the ground, preventing it from being displaced by buoyancy. This is critical for maintaining the integrity of the tank and preventing potential leaks or spills, which can lead to environmental contamination and regulatory violations.

Other factors, such as stability during earthquakes or legal requirements, may play a role, but the primary concern is to prevent buoyancy issues that could jeopardize the tank's placement. Additionally, while maintaining temperature may be relevant for certain aspects of tank operation, it's not directly related to the need for anchoring the tank in place against rising water levels.