- Above-ground tanks used for outside, above-grade storage of Class I liquids shall be listed and labeled as protected above-ground tanks in accordance with UL 2085 and shall be in accordance with Chapter 57. Such tanks shall be located in accordance with Table 2306.2.3.
- Tanks containing fuels shall not exceed 12,000 gallons (45 420 L) in individual capacity or 48,000 gallons (181 680 L) in aggregate capacity. Installations with the maximum allowable aggregate capacity shall be separated from other such installations by not less than 100 feet (30 480 mm).
- Tanks located at farms, construction projects, or rural areas shall comply with Section 5706.2.
- Above-ground tanks used for outside above-grade storage of Class IIIB liquid motor fuel shall be listed and labeled in accordance with UL 142 or listed and labeled as protected above-ground tanks in accordance with UL 2085 and shall be installed in accordance with Chapter 57. Tank locations shall be in accordance with Table 2306.2.3.
MINIMUM SEPARATION REQUIREMENTS FOR ABOVE-GROUND TANKS
|CLASS OF LIQUID AND TANK TYPE||INDIVIDUAL TANK CAPACITY (gallons)||MINIMUM DISTANCE FROM NEAREST IMPORTANT BUILDING ON SAME PROPERTY (feet)||MINIMUM DISTANCE FROM NEAREST FUEL DISPENSER (feet)||MINIMUM DISTANCE FROM LOT LINE THAT IS OR CAN BE BUILT UPON, INCLUDING THE OPPOSITE SIDE OF A PUBLIC WAY (feet)||MINIMUM DISTANCE FROM NEAREST SIDE OF ANY PUBLIC WAY (feet)||MINIMUM DISTANCE BETWEEN TANKS (feet)|
|Class I protected above-ground tanks||Less than or equal to 6,000||5||25a||15||5||3|
|Greater than 6,000||15||25a||25||15||3|
|Class II and III protected above-ground tanks||Same as Class I||Same as Class I||Same as Class Ic||Same as Class I||Same as Class I||Same as Class I|
|Tanks in vaults||0-20,000||0b||0||0b||0||Separate compartment required for each tank|
For SI: 1 foot = 304.8 mm, 1 gallon = 3.785 L.
- At fleet vehicle motor fuel-dispensing facilities, a minimum separation distance is not required.
- Underground vaults shall be located such that they will not be subject to loading from nearby structures, or they shall be designed to accommodate applied loads from existing or future structures that can be built nearby.
- For Class IIIB liquids in protected above-ground tanks, a minimum separation distance is not required.
Where installation of tanks in accordance with Section 5704.2.11 is impractical, or because of property or building limitations, tanks for liquid motor fuels are allowed to be installed in buildings in special enclosures in accordance with all of the following:
- The special enclosure shall be liquid tight and vapor tight.
- The special enclosure shall not contain backfill.
- Sides, top and bottom of the special enclosure shall be of reinforced concrete not less than 6 inches (152 mm) thick, with openings for inspection through the top only.
- Tank connections shall be piped or closed such that neither vapors nor liquid can escape into the enclosed space between the special enclosure and any tanks inside the special enclosure.
- Means shall be provided whereby portable equipment can be employed to discharge to the outside any vapors that might accumulate inside the special enclosure should leakage occur.
- Tanks containing Class I, II or IIIA liquids inside a special enclosure shall not exceed 6,000 gallons (22 710 L) in individual capacity or 18,000 gallons (68 130 L) in aggregate capacity.
- Each tank within special enclosures shall be surrounded by a clear space of not less than 3 feet (910 mm) to allow for maintenance and inspection.
2306.6 Piping, Valves, Fittings and Ancillary Equipment for Use With Flammable or Combustible Liquids
2306.6.2 Piping, Valves, Fittings and Ancillary Equipment for Above-Ground Tanks for Class I, II and III Liquids
Overhead-type dispensing units shall be provided with a listed automatic-closing-type hose nozzle valve with a latch-open device. The design of the system shall be such that the hose nozzle valve will close automatically in the event the valve is released from a fill opening or upon impact with a driveway.
Any latch-open device determined to be inoperative by the fire code official shall be repaired or replaced within 48 hours after notification.