Automatic tank gauges (ATG) are designed to detect leaks in which part of the system?

Automatic tank gauges (ATG) are designed to monitor the entirety of the fuel storage system, which includes both the storage tank and the product piping. This dual capability is crucial for maintaining environmental safety and compliance with regulations, as both the tank and the associated piping are potential sources of leaks that could lead to contamination.

The ATG continually measures liquid levels in the tank and pressures in the piping, allowing it to detect inconsistencies that may indicate a leak. By assessing the tank's integrity and the condition of the piping, the system ensures comprehensive monitoring, facilitating early detection of leaks before they escalate.

Monitoring only one aspect, such as just the storage tank or just the product piping, would leave significant vulnerabilities that could result in undetected leaks and environmental harm. Therefore, the correct answer reflects the complete functionality of ATGs in providing robust leak detection across the entire system.