How many methods of leak detection are required for Category 1 tank systems?

For Category 1 tank systems, the requirement is to implement two methods of leak detection. This regulation is rooted in the need to prevent environmental contamination from underground storage tanks (USTs) and to ensure the safety of the surrounding area. Having two methods of leak detection provides a more reliable system for early detection of leaks, reducing the risks associated with potential spills or leaks into the environment, particularly groundwater.

The two methods typically include a combination of automatic tank gauging systems and periodic monitoring, which together enhance the overall integrity management of the tank system. This requirement aligns with the stricter standards put forth in environmental regulations that aim to minimize the adverse effects of leaks on public health and the ecosystem.