When is static ground primarily utilized?

Static ground is primarily utilized during the process of offloading fuel into a storage tank. This practice is crucial for preventing static electricity buildup, which can lead to sparks and, consequently, potential fire hazards when flammable materials are present. Ensuring that static electricity is dissipated during fuel transfer helps maintain a safe working environment, as static discharges can ignite vapors from fuel.

In contrast, the other options focus on different applications of grounding, such as providing a reference point for electrical systems or stabilizing voltage, but they don’t directly address the specific safety concerns associated with static electricity during fuel operations.