What action should be prioritized to mitigate the risk of a fuel spill at an airport?

Prioritizing the implementation of a spill response plan is crucial in mitigating the risks associated with fuel spills at an airport. A well-structured spill response plan outlines specific actions to be taken in the event of a spill, detailing emergency procedures, designated responsibilities, and communication protocols. By having a proactive approach, such a plan ensures that all personnel are prepared to respond swiftly and effectively to minimize environmental impact and enhance safety. This preparedness can significantly reduce the potential damage caused by a fuel leak or spill.

Training staff on handling fuels, while important, is more of a preventative measure than a direct response mechanism. Increasing fuel storage capacity does not address spill risk directly and could even exacerbate potential incidents if not managed properly. Similarly, while assigning more personnel to fueling operations can help manage the workload, it doesn't necessarily create a systematic approach to spill response, which is essential when dealing with hazardous situations. Thus, implementing a spill response plan stands out as the most effective action in managing the risks associated with fuel spills.