What is the deadline for the first three-year test or inspection of spill and overfill prevention equipment installed before October 13, 2015?

The correct answer is October 13, 2018, because regulations require that spill and overfill prevention equipment installed before October 13, 2015, undergo testing or inspection within three years of that date. This deadline is crucial to ensure compliance with safety standards that help prevent environmental contamination and ensure the integrity of underground storage tanks.

Understanding this regulation highlights the importance of timely inspections and testing to maintain compliance and safeguard against potential leaks or spills from UST systems. Meeting this deadline is vital for operators to adhere to regulatory requirements and protect both their business and the environment.