If a product is used for ballast, what is the maximum percentage to fill the tank?

When using a product as ballast in an underground storage tank (UST), it is crucial to ensure that the tank is not filled to its maximum capacity. Ballast is typically utilized to provide weight to a tank and prevent it from floating when empty, particularly in situations where groundwater levels may pose a risk to the stability of the tank.

Filling the tank to a maximum of 95 percent allows for sufficient space for the product while also leaving some room for potential expansion due to temperature fluctuations or other factors. This practice helps to prevent overfilling, leaks, or spills, which can have serious environmental implications. By maintaining a maximum fill level of 95 percent, operators can ensure compliance with safety standards and minimize risks associated with underground storage tanks.