When a tank is temporarily removed from service, which of the following procedures should NOT be followed?

In the context of temporarily removing a tank from service, the correct procedure is to avoid adding enough product to completely fill the tank. This is important for several reasons related to safety and tank maintenance.

When a tank is taken out of service, it is crucial to ensure that the tank does not become over-pressurized or at risk of leaks due to temperature fluctuations or other external factors. Filling the tank completely with product can create pressure issues and is not conducive to safely maintaining the integrity of the tank during the temporary closure period.

On the other hand, the other procedures listed involve either removing liquids from the tank or maintaining a specific level of liquid to create a controlled environment. For instance, leaving a small amount of liquid to assure a saturated vapor space can help mitigate risks associated with vapors and potential corrosion of the tank interior. Removing all stored liquid and potentially ballasting the tank with water helps prevent the tank from floating or being damaged due to environmental factors.