Before embarking on such research, discuss the situation with your fire insurance carrier, otherwise, you may be off on your decisions and then be denied credit on your fire insurance policy.
There are a lot of NFPAs, the ones that I've used on tank farms so far are:
NFPA 11 - Standard for Low Expansion Foam
NFPA 13 - Installation of Sprinkler systems
NFPA 16 - Standard for the Installation of Foam-Water Sprinkler and Foam-Water Spray Systems
NFPA RP 14G - Recommended Practice for Fire Prevention and Control on Open Type Offshore Production Platforms
NFPA 20 - Standard for the Installation of Stationary Pumps for Fire Protection
NFPA 22 - Standard for Water Tanks for Private Fire Protection
NFPA 25 - Standard for Inspection, Testing and Maintenance of Water-Based Fire Protection Systems
NFPA 30 - Flammable and Combustible Liquids Code
NFPA 58 - Standard for the Storage and Handling of Liquefied Petroleum Gases