§ 42-8. Tanks.

A. 

Tanks shall be constructed of black steel, open-hearth steel or wrought iron, of a minimum gauge, depending upon the capacity as follows:

Capacity Gallons	Thickness
	Shell	Head
55	14 gauge	14 gauge
56 to 275	12 gauge	12 gauge
276 to 550	3 to 16 gauge	3 to 16 gauge
551 to 750	3 to 16 gauge	3 to 16 gauge
751 to 1,080	3 to 16 gauge	3 to 16 gauge
1,081 to 1,500	1 to 4 gauge	1 to 4 gauge
1,501 to 2,000	1 to 4 gauge	1 to 4 gauge
2,001 to 2,500	1 to 4 gauge	5 to 16 gauge
2,501 to 3,000	1 to 4 gauge	5 to 16 gauge
3,001 to 3,500	1 to 4 gauge	5 to 16 gauge
3,501 to 4,000	1 to 4 gauge	5 to 16 gauge
4,001 to 5,000	1 to 4 gauge	5 to 16 gauge
5,001 to 7,000	5 to 16 gauge	3 to 8 gauge
7,001 to 10,000	5 to 16 gauge	3 to 8 gauge

B. 

Air-pressure tests. All tanks and piping proposed to be used for the storage of any byproducts of petroleum shall be subjected to an air- or hydrostatic-pressure test of 10 pounds per square inch for at least 30 minutes and shall show no leaks.

C. 

Storage tank for fuel oil shall be thoroughly coated on the outside with tar, asphaltum or other suitable rust-resisting material.

D. 

Joints and connections. All joints shall be riveted and caulked, brazed, welded or made tight by some equally satisfactory process. Tanks shall be tight and sufficiently strong to bear without injury the most severe strains to which they may be subjected in practice. Shells or tanks shall be properly reinforced where connections are made and all connections shall be made through the top of the tank.

E. 

Location of storage tanks. Storage tanks shall preferably be located outside, underground, with the top of the tank below the level of the burner where tanks are located so that the top of the tank is above the level of the suction inlet of the pump supplying oil to the burner assembly. A siphon-breaking device consisting of an anti-siphon valve, vacuum tank, vacuum siphon breaker, siphon-breaking pump set or equivalent device to prevent siphoning shall be installed.

F. 

When located inside a building or aboveground, the aggregate capacity of the tanks shall not exceed 275 gallons. When inside a building, tanks must be at least 10 feet from furnace.

G. 

If soil conditions warrant, underground tanks shall be set on a concrete foundation not less than six inches in thickness for tanks not exceeding 1,080 gallons' capacity and eight inches for tanks exceeding 1,080 gallons' capacity.

H. 

Except with the prior approval of the Plumbing Inspector of the Town of Rye, no tank shall be placed nearer than five feet to a foundation or bearing wall of a building, depending upon the capacity of the tank; and the distance shall be increased proportionately depending upon the capacity of the tank; five feet being the minimum for a tank of 550 gallons of capacity and one additional foot for each 500 gallons' capacity in excess thereof.

I. 

Where tanks in connection with a system exceed an aggregate capacity of 275 gallons and cannot be buried either inside or outside of a building, they may be located in the lowest story of the building under the following conditions:

(1) 

They shall be placed in an enclosure, the walls, floor and roof of which shall be constructed of reinforced concrete not less than four inches in thickness, or of eight inches of masonry and of dimensions six inches greater on all sides than the outside dimensions of the tank.

(2) 

The walls of the enclosure shall be carried up to a height of not less than one foot above the tank and roofed over with reinforced concrete not less than four inches in thickness.

(3) 

A space of at least two feet shall be maintained between the top of the roof of the enclosure and the ceiling immediately above.

(4) 

The space surrounding the tank formed by the enclosure walls and roof shall be completely filled with clean sharp sand or dry earth, well tamped into place.

(5) 

Not more than one tank shall be placed in an enclosure.