What is the limit per NFPA 30 for gross floor area in a hazardous material...

The answer is A. According to NFPA 30: Flammable and Combustible Liquids Code, 2021 Edition, Chapter 14, lockers used for the storage of flammable or combustible liquids shall not exceed 1500 ft2 (139 m2) gross floor area. This limit applies to both indoor and outdoor lockers.Lockers are defined as self-contained, prefabricated structures that are designed to store hazardous materials and that are equipped with fire protection features, such as fire-resistance-rated walls, doors, and roofs, automatic sprinklers, spill containment, and ventilation12