1305.13.2 Above ground; on the lowest floor inside a building.
MC § 1305.13.2
Tanks located above ground, on the lowest floor inside of buildings, shall comply with the following requirements: 1. Enclosure of room. Installation of tank(s) and enclosure of room shall comply with Section 1305.11.1.2.
2.Fire-extinguishing system. Fire extinguishing systems shall comply with Section 1305.11.1.2.
3.Ventilation. Rooms containing fuel-oil tanks shall be ventilated to limit the concentration of vapors within the room at or below 25 percent of the Lower Flammable Limit (LFL) of the fuel oil being used.
4.Containment. Fuel-oil tanks having a capacity of more than 660 gallons (2498.4 L) storage shall be provided with secondary containment intended to capture any leakage of fuel oil from the tank. The capacity of the containment shall equal or exceed the capacity of the tank served. For fuel storage, the capacity shall include the portion of the tank up to the height of the containment.
5.Special limitations near subways. Regardless of capacity, fuel-oil tanks located within the outer lines of the subway, or within 20 feet (6096 mm) of the outside line of a subway shall be placed within a welded steel oil-tight pan of not less than No. 18 Gage metal suitably reinforced and of capacity to contain the contents of the tank. For the purpose of the foregoing requirement, a subway shall be deemed to include any subsurface railroad or rapid transit roadbed.
