What factor is critical in determining static electricity during fueling operations?

The critical factor in determining static electricity during fueling operations is the type of fuel being used. Different fuels have varying tendencies to develop static charges based on their chemical composition. For example, more volatile fuels can accumulate static charges more easily than less volatile ones due to their properties during the transfer and movement within fueling systems. Moreover, specific fuels may have lower conductivity, which can lead to an increased risk of static electricity accumulation, especially in environments that are dry or where movement is rapid.

While other factors, such as equipment age, humidity levels, and on-site personnel, play roles in overall safety and operational effectiveness, they do not directly influence the fundamental properties of static electricity related to the fuel itself. Understanding the characteristics of the fuel type is essential for implementing appropriate safety measures to mitigate the risk of static discharge during fueling operations, such as grounding and bonding procedures.