What is the acceptable method for securing underground tanks?

The acceptable method for securing underground tanks is by anchoring them to prevent floatation. Underground tanks are particularly susceptible to buoyancy during flooding or when the water table rises. If the tanks are not anchored, they may float up due to the pressure of the surrounding water, which can lead to significant hazards, including leaks or dislodgment.

Using an anchoring system involves physically attaching the tank to the ground or surrounding material, ensuring it remains securely in place regardless of external water pressures. This is especially important for aboveground tanks and certain types of below-ground installations, where maintaining the tank's position is crucial for safety and operational integrity.

Other methods, such as heavy weights or foam padding, do not provide the same level of security as anchoring would. While heavy weights might help in some situations, they are not a reliable solution against the forces that could be exerted on a tank by rising water. Leaving tanks unanchored poses clear risks to safety and environmental integrity, making anchoring the most effective and recommended method.