This Standard sets forth minimum design and construction requirements for fibre reinforced plastic, non-pressure tanks that are used for the underground storage of flammable and combustible liquids, such as; petroleum products, oxygenated fuel blends, oxygenates, and other flammable and combustible liquids This Standard covers tanks of either single, double or multiple wall construction, and where the primary tank may have a single compartment or have multiple compartments.

This Third Edition Joint ANSI and NSC has harmonized the requirements of, and now supersedes, the following documents:

•  CAN/ULC-S615-14, Standard for Fibre Reinforced Underground Tanks for Flammable and Combustible Liquids; and
•  UL 1316, Standard for Glass-Fiber-Reinforced Plastic Underground Storage Tanks for Petroleum Products, Alcohols, and Alcohol-Gasoline Mixtures