Section 245.525. Ancillary equipment for aboveground storage tanks

(a) Ancillary equipment shall be designed and installed in accordance with Nationally recognized codes of practice and manufacturer’s specifications such as API, ASME, ASTM, UL, PEI or ANSI. Ancillary equipment shall be in good working order and maintained according to manufacturer’s specifications and accepted industry practices. Ancillary equipment shall be compatible with the stored substance.

(b) Tanks shall be appropriately vented to protect the tank from over pressurization and excessive vacuums. Vents shall meet or exceed the appropriate codes of practice developed by Nationally recognized associations such as API and NFPA. Normal venting shall allow the tank to breath when transferring the stored product. Emergency venting shall ensure that the safe pressure for the tank is not exceeded.

(c) Tank connections through which regulated substance can flow shall be equipped with an operating valve adjacent to the tank to control flow of substance. Appropriate valves shall be installed to meet or exceed current codes of practice and jurisdictional requirements. Valves shall be designed, installed and maintained according to current codes of practice.