What is the first safety measure required before starting railcar and depot operations?

Bonding and grounding are critical safety measures in petroleum supply operations, especially when handling flammable materials such as those transported in railcars or stored in depots. This procedure prevents the buildup of static electricity, which can occur during loading or unloading processes. If static electricity accumulates to a significant level, it has the potential to ignite vapors that may be present, leading to fire or explosion hazards. Therefore, ensuring that all equipment is properly bonded and grounded provides a safe working environment and mitigates the risks associated with the flammable nature of the products involved.

Closing vent valves, checking for leaks, and inspecting the equipment are essential steps in ensuring overall safety and operational efficiency, but they are secondary to the bonding and grounding process. Establishing a grounding connection first helps to safely manage any potential electrical charge before carrying out other safety checks and operational procedures.