Which of the following is not a form of release detection for tanks?

• A. Monthly groundwater monitoring
• B. ATG monitoring
• C. Inventory control
• D. Daily visual inspection of the spill bucket

Answer: (D)

Release detection methods are systematic ways to identify a leak from a tank or its piping. Monthly groundwater monitoring checks for contaminants in the surrounding groundwater to catch leaks that have reached the environment. ATG monitoring (automatic tank gauging) continuously monitors the tank’s inventory and device readings to reveal unexplained decreases that signal a leak. Inventory control compares the amount of product stored with what has been withdrawn or dispensed, flagging discrepancies that indicate a possible release.

Daily visual inspection of the spill bucket, while important for preventing releases and catching obvious spills during fueling, does not provide a formal, ongoing mechanism to detect leaks from the tank or piping. It’s an operations check, not a regulatory release-detection method.