Page 462 - 2018_IFC

FLAMMABLE AND COMBUSTIBLE LIQUIDS

off flow into the tank so that none of the fit- graphical conditions, nature of occupancy and
tings on the top of the tank are exposed to proximity to buildings on the same or adjacent
product because of overfilling. property, capacity, and construction of proposed
tanks and character of liquids to be stored, and
5704.2.9.7.5.1 Information signs. A permanent nature and quantity of private and public fire pro-
sign shall be provided at the fill point for the tection provided.
tank, documenting the filling procedure and the
tank calibration chart. 2. Drainage control and diking is not required for
listed secondary containment tanks.
Exception: Where climatic conditions are
such that the sign may be obscured by ice or 5704.2.10.1 Volumetric capacity. The volumetric
snow, or weathered beyond readability or oth- capacity of the diked area shall be not less than the
erwise impaired, said procedures and chart greatest amount of liquid that can be released from the
shall be located in the office window, lock box largest tank within the diked area. The capacity of the
or other area available to the person filling the diked area enclosing more than one tank shall be calcu-
tank. lated by deducting the volume of the tanks other than
the largest tank below the height of the dike.
5704.2.9.7.5.2 Determination of available tank
capacity. The filling procedure shall require the 5704.2.10.2 Diked areas containing two or more
person filling the tank to determine the gallonage tanks. Diked areas containing two or more tanks shall
(literage) required to fill it to 90 percent of capac- be subdivided in accordance with NFPA 30.
ity before commencing the fill operation. 5704.2.10.3 Protection of piping from exposure fires.
5704.2.9.7.6 Fill pipe connections. The fill pipe Piping shall not pass through adjacent diked areas or
shall be provided with a means for making a direct impounding basins, unless provided with a sealed
connection to the tank vehicle’s fuel delivery hose sleeve or otherwise protected from exposure to fire.
so that the delivery of fuel is not exposed to the open 5704.2.10.4 Combustible materials in diked areas.
air during the filling operation. Where any portion of Diked areas shall be kept free from combustible materi-
the fill pipe exterior to the tank extends below the als, drums and barrels.
level of the top of the tank, a check valve shall be 5704.2.10.5 Equipment, controls and piping in diked
installed in the fill pipe not more than 12 inches (305 areas. Pumps, manifolds and fire protection equipment
mm) from the fill hose connection.
or controls shall not be located within diked areas or
5704.2.9.7.7 Spill containers. A spill container hav- drainage basins or in a location where such equipment
ing a capacity of not less than 5 gallons (19 L) shall and controls would be endangered by fire in the diked
be provided for each fill connection. For tanks with area or drainage basin. Piping above ground shall be
a top fill connection, spill containers shall be non- minimized and located as close as practical to the shell
combustible and shall be fixed to the tank and of the tank in diked areas or drainage basins.
equipped with a manual drain valve that drains into Exceptions:
the primary tank. For tanks with a remote fill con-
nection, a portable spill container shall be allowed. 1. Pumps, manifolds and piping integral to the
tanks or equipment being served, which is pro-
5704.2.9.7.8 Tank openings. Tank openings in pro- tected by intermediate diking, berms, drainage
tected above-ground tanks shall be through the top or fire protection such as water spray, moni-
only. tors or resistive coating.
5704.2.9.7.9 Antisiphon devices. Approved antisi- 2. Fire protection equipment or controls that are
phon devices shall be installed in each external pipe appurtenances to the tanks or equipment being
connected to the protected above-ground tank where protected, such as foam chambers or foam pip-
the pipe extends below the level of the top of the ing and water or foam monitors and hydrants,
tank. or hand and wheeled extinguishers.
5704.2.10 Drainage and diking. The area surrounding a 5704.2.11 Underground tanks. Underground storage of
tank or group of tanks shall be provided with drainage flammable and combustible liquids in tanks shall comply
control or shall be diked to prevent accidental discharge of with Section 5704.2 and Sections 5704.2.11.1 through
liquid from endangering adjacent tanks, adjoining prop- 5704.2.11.4.2.
erty or reaching waterways.
5704.2.11.1 Location. Flammable and combustible liq-
Exceptions: uid storage tanks located underground, either outside or
under buildings, shall be in accordance with all of the
1. The fire code official is authorized to alter or
waive these requirements based on a technical following:
report that demonstrates that such tank or group 1. Tanks shall be located with respect to existing
of tanks does not constitute a hazard to other foundations and supports such that the loads car-
tanks, waterways or adjoining property, after ried by the latter cannot be transmitted to the
consideration of special features such as topo- tank.

2018 INTERNATIONAL FIRE CODE ® 429
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