A. 
The minimum distance of outside aboveground tanks to the line of adjoining property which may be built upon is as follows:
Capacity of Tanks
(gallons)
Minimum Distance to Line of Adjoining Property Which May Be Built Upon
(feet)
0 to 12,000
10
12,001 to 24,000
15
24,001 to 30,000
20
30,001 to 50,000
25
B. 
At marketing stations and elsewhere, truck loading racks shall be separated from tanks, warehouses and other plant buildings by distances at least equivalent to those specified in the above table.
Where tanks are to be used for capacities above 50,000 gallons, the minimum distance from the tank to the adjoining property line shall be 25 feet, except that the Town Board, in its discretion, may increase such distance after consideration of the special features, such as topographical conditions, nature of occupancy and character of construction of such buildings; capacity and construction of proposed tanks and character of liquid to be stored; degree of private fire protection to be provided; facilities of the local fire department to cope with tank fires; and any other local conditions which may be deemed necessary to consider.
A. 
Minimum distances between aboveground storage tanks apply to all classes of liquids and shall be as follows:
Capacity of Tanks
(gallons)
Minimum Distance Between Tanks
(feet)
25,000 or less
5
25,001 to 50,000
10
50,001 to 100,000
15
Above 100,000
Distance equal to the diameter of the tank or of the larger of the 2 tanks between which distance is to be measured
B. 
Notwithstanding the foregoing, aboveground tanks with foam protection approved by the Nassau County Fire Marshal may be placed with a minimum distance between tanks of 1/2 the diameter of the larger of said tanks if it is cylindrical or of 1/2 the greatest horizontal length of such tank if it is not cylindrical.
Notwithstanding any other provision of this chapter, a tank may be erected above ground for the storage of liquids having a flash point of 100° F. or more, having a capacity of more than 1,000,000 but not more than 3,000,000 gallons, provided that, in addition to all other regulations for such tanks in this chapter:
A. 
Such tank shall not be installed within 1,000 feet of any building occupied as a hospital, sanatorium, church, school, theater or other place of public amusement or public assembly, nor within 250 feet of a public park or land zoned for residential purposes.
B. 
Such tanks shall be so located that the distance between the shell of any tank and the property line of the property on which it is located or the nearest building is not less than 1 1/2 times the greatest dimension of the tank, except that for tanks equipped with either a permanently attached extinguishing system or a floating roof, such distance may be reduced to not less than the greatest dimension of the tank.
No tank shall be more than 48 feet in height at its highest point, measured from the ground.
When tanks are erected in rows of three or more tanks each, not more than two such rows may be erected adjacent to each other, and no such group of two rows shall be erected nearer than 25 feet to any other dike surrounding more than one tank.
All aboveground tanks shall be constructed throughout of steel or wrought iron of sufficient strength to withstand pressure to which they may be subjected, with a safety factor of at least three.
All vertical tanks shall be placed upon reinforced concrete foundations of approved design. Where meadowlands or soft materials are encountered, wood or concrete pilings shall be placed under the concrete foundations as directed and approved by the Building Inspector.
Every flammable or combustible liquid tank or group of tanks having a capacity of 20,000 gallons or over, but not exceeding 250,000 gallons, shall be completely surrounded by a retaining dike. Each tank exceeding 250,000 gallons' capacity shall have a separate dike.
A. 
Each dike shall have a capacity equal to that of the largest tank plus 10% of the remaining tanks in each enclosure, shall be designed to be liquid-tight and to withstand a full hydraulic head. Dikes may be constructed of reinforced concrete, steel or earth, as follows:
(1) 
If of reinforced concrete or steel, walls shall be not less than three feet and not more than eight feet in height, except that for liquids having a flash point of 100° F. or above, the height of such dike may be extended to not more than 60% of the height of the tank, measured as provided in § 132-19 hereof.
(2) 
If of earthen construction, walls shall be of clay not less than three feet and not more than eight feet in height, shall have a flat section at the top not less than two feet wide and the slope shall be consistent with the angle of repose of the material of which the walls are constructed. Dikes so constructed shall be maintained so as to comply with the foregoing specifications.
(3) 
In every case, steel stairways to and from the diked area shall be provided at each dike.
B. 
No part of the outside perimeter of any dike shall be less than 25 feet from the nearest property line of the parcel on which it is erected.
C. 
No dike shall be so erected that any part of its inside perimeter shall be nearer than seven feet to any tank within such dike.
All flammable and combustible liquid tanks, unless otherwise specifically approved by the Building Inspector, must be provided with a permanently open vent or with a combination fill and vent fitting so arranged that the fill pipe cannot be opened without opening the vent pipe. Vent openings shall be equipped with noncorrodible screens or flash preventers completely covering the openings. Vent openings shall be adequate to relieve excessive pressure or a safety valve or other means of relieving the pressure shall be provided.
A. 
All pipes used in systems for flammable and combustible liquids shall be of the standard full-weight wrought iron, steel or brass type for working pressures less than 100 pounds per square inch. For working pressures in excess of 100 pounds per square inch, extra-heavy pipe and fittings shall be used.
B. 
Outside, aboveground piping shall be properly supported and protected against mechanical injury. Piping should be run as directly as possible and proper allowance made for expansion and contraction. Each pipe attached to a tank shall be provided with a valve at the tank. There shall be no branches or outlets between the tank and valve. Inside piping shall be rigidly supported.
No system of artificial light other than vaporproof, incandescent electric lights shall be installed in any portion of premises used for the storage of flammable and combustible liquids.
No flammable or combustible liquid tank shall be painted within four months after its erection, at which time each tank shall be scratch-brushed to remove the scale and painted with rust-resisting material.
Lots in which such tanks are located shall be suitably enclosed with fences at least six feet high or shall be otherwise guarded against intruders, and the tanks shall be marked clearly "Flammable — Keep Fire Away" for flammable liquid tanks or "Combustible — Keep Fire Away" for combustible liquid tanks.
All flammable and combustible liquid tanks shall be electrically grounded by resting directly on moist earth or otherwise electrically grounded to permanent moisture. The type of connection used to facilitate this electrical ground shall be capable of conducting electricity and not act as an insulator. Telephone poles or other projections liable to act as lightning discharge points shall be kept as far as practicable from tanks.
Every marketing station, wholesale storage, port terminal and other property where such flammable liquids are stored in quantities shall be provided with suitable foam fire-extinguishing equipment or with other special equipment, appliances and apparatus, as recommended by the Building Inspector.
All tanks having a storage capacity of 20,000 gallons or less shall be horizontal tanks and shall be placed upon steel or concrete bases designed to carry the load.
No open tanks shall be permitted or used.