A red tag affixed to a UST fill pipe means that ______.

• A. The UST is eligible for delivery
• B. The UST or UST system is ineligible for delivery, deposit, or acceptance of product
• C. The UST is not pressurized
• D. The fill pipe is sealed

Answer: (B)

A red tag on the fill pipe signals that the UST system is out of service and not eligible for delivery, deposit, or acceptance of product. This tag communicates to fuel suppliers and maintenance crews that the tank cannot receive fuel until the issue is addressed and the system is allowed back into service. It’s about the operational status, not pressures or sealing—so the red tag means don’t deliver or add product until the tag is cleared.