Which standard must supply tanks conform to for underground installations?

Supply tanks for underground installations must conform to UL 58. This standard outlines the requirements for the design, construction, and performance of underground storage tanks that are used for the storage of flammable and combustible liquids. Compliance with UL 58 ensures that these tanks are built to withstand the stresses typical of underground installation, including structural integrity with respect to groundwater or soil movements, and prevention of leaks that could lead to environmental contamination.

Understanding the importance of this standard helps in recognizing the safety measures that need to be in place to protect both the public and the environment from potential hazards related to underground fuel storage. The other standards mentioned pertain to various other aspects of safety and storage but are not specifically focused on the requirements for underground supply tanks used primarily for flammable and combustible liquids.