What is an essential safety feature for heating oil tank installations?

A secondary containment system is an essential safety feature for heating oil tank installations because it serves as a safeguard against potential leaks or spills. In the event of a tank failure or a fitting malfunction, this system captures any oil that escapes, preventing it from contaminating the surrounding environment, including soil and groundwater. Additionally, regulatory bodies often require secondary containment as a part of compliance with environmental safety standards. This feature is critical not only for environmental protection but also to mitigate risks related to fire hazards and property damage.

While other options, such as automatic shut-off valves and pressure relief valves, are important safety devices, they primarily focus on preventing overfill or managing pressure within the tank. Emergency alarm systems can alert personnel to potential issues, but they do not provide a physical barrier against leakage. Thus, the secondary containment system stands out as a fundamental component of a robust safety strategy for heating oil tank installations.