We have (4)x 3 million USG tank farm being built outside of town to help service the mining industry. I see numerous applicable codes. What is most relevant?
Not sure what you do for a living if you are an ahj and have not delt with this issue before suggest you require a technical report on what you are getting and the best way to protect with the specifications you provide.
Also look:
-NFPA 30A if there is a fuel supply for mobile equipment,
-local regulations related to water and soil pollution prevention due to the handling and storage of fuels in case of spillage.