What are the two methods of leak detection required for existing pressurized piping connected to Category 1 or 2 tank systems?

The correct answer reflects the regulatory requirements for leak detection in existing pressurized piping linked to Category 1 or 2 tank systems. This involves employing an automatic line leak detector, which continuously monitors the piping for any leaks by analyzing pressure changes or flow rates. This real-time monitoring is crucial for promptly identifying potential leaks and preventing environmental contamination.

Additionally, the requirement for an annual line tightness test complements the automatic detection system. This test thoroughly checks the integrity of the piping system under controlled conditions to ensure it can contain the stored product without leaks. By combining continuous monitoring with periodic testing, operators can effectively manage the risks associated with pressurized piping systems linked to regulated tanks.

Other options do not conform to the necessary regulatory standards for leak detection. Visual inspections, manual checks, or non-specific monitoring methods do not provide the same level of reliability and compliance as the mandatory combination of automatic detection and annual testing.