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// CODE SNIPPET

3406.4.5.9 Mounded-Over Tanks

NYC Fire Code 2014 > 34 Flammable and Combustible Liquids > 3406 Special Operations > 3406.4 Bulk Plants and Terminals > 3406.4.5 Storage > 3406.4.5.9 Mounded-Over Tanks
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Mounded-over tanks shall be considered underground tanks. A mounded-over tank may be erected with its base at any desired elevation not higher than the grade plane of the premises. It shall be enclosed with a steel, reinforced-concrete, or closed-face-concrete cribbing wall extending from the established grade to the top of the top cover, with the exterior face of the wall at least 10 feet (3048 mm) from the exterior face of the wall of the tank, and backfilled between the tank and the enclosing wall with compacted clean earth or sand containing no ash or other corrosive substance. The wall and backfill may be replaced with compacted similar fill, extending from the established grade to the level of the top cover on the tank, at the normal angle of repose of the material so used, with the provision that the width of the sloped material at the level of the top of the top cover shall be at least 10 feet (3048 mm) wide. When two or more mounded-over tanks, either rectangular or vertical-cylindrical, are grouped together, the tanks shall be at least 1 foot (305 mm) apart from each other, and the group of tanks shall be enclosed around the periphery with the same type of wall and backfill described above for one mounded-over tank.

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shall not be placed over or near a line of stairs or an elevator shaft, unless there is a solid roof or floor underneath the tank ...
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406.5.3 Special Detailed Requirements Based on Use and Occupancy, Storage Tanks
at least 12 inches (305 mm) beyond the horizontal outlines of the storage tanks, and placed over a cover of suitable clean backfill material. Such slab ...
NYC Building Code 2008 > 4 Special Detailed Requirements Based on Use and Occupancy > 406 Motor Vehicle-Related Occupancies > 406.5 Motor Fuel-Dispensing Facilities > 406.5.3 Storage Tanks
406.5.4 Special Detailed Requirements Based on Use and Occupancy, Storage Tanks
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