(A) (1) Location of an aboveground tank for storage of flammable liquids with respect to distance from the nearest line of adjoining property which may be built upon, which shall be such that the distance between any part of the tank and the line shall be not less than that set forth in the following table:
Minimum distance of outside aboveground tanks for flammable liquids other than crude petroleum to line of adjoining property which may be built upon.
Capacity of Tank (in gallons) | Class of Flammable Liquid | Minimum Distance (in feet) |
0 to 275
|
III-B
|
0
|
276 to 750
|
III-B
|
5
|
0 to 750
|
I, II and III-A
|
10
|
751 to 12,000
|
III-B
|
10
|
751 to 12,000
|
I, II and III-A
|
15
|
12,001 to 24,000
|
I, II, III-A and III-B
|
15
|
24,001 to 30,000
|
I, II, III-A and III-B
|
20
|
30,001 to 50,000
|
I, II, III-A and III-B
|
25
|
(2) Tanks with capacities in excess of 50,000 gallons and all tanks for the storage of crude petroleum shall be located in accordance with the following provisions (applicable to gas-tight tanks including conservation type tanks constricted in compliance with these or equivalent standards):
Product Stored | Tank Protection | Distance From Line of Adjoining Property Which May Be Built Upon Shall Be Not Less Than |
(1) An approved permanently attached extinguishing system or | Greatest dimension of diameter or height of tank, except that such distance need not exceed 120 feet | |
Refined petroleum products or other flammable liquids not subject to boilover | (2) An approved floating roof not equipped with either of the above | One and one-half times the greatest dimension of diameter or height of tank except that such distance need not exceed 175 feet |
(1) An approved permanently attached extinguishing system or | Two times the greatest dimension of diameter or height of tank except that such distance shall not be less than 20 feet and need not exceed 175 feet | |
Crude petroleum* | (2) An approved floating roof not equipped with either of the above | Three times the greatest dimension of diameter or height of tank except that such distance shall not be less than 20 feet and need not exceed 350 feet |
* Or other non-petroleum product, handled in special process and chemical plants, which have boilover characteristics somewhat like those of crude petroleum. | ||
(B) Location of any aboveground tank for the storage of flammable liquids on the premises of any Division VI, commercial and industrial establishment, or any Division VII, processing plant, with respect to the distance to the nearest building or line of adjoining property which may be built upon, shall be such that the distance between any part of the tank and such building or property line is not less than that set forth in the following table:
Minimum distance between any outside aboveground tank for flammable liquids on the premises of any Division VI or VII occupancy to the nearest building of line of adjoining property which may be built upon.
Diameter of Tank Minimum Distance to
(in feet) Building (in feet)
Under 15 15
15 to 30 tank diameter
30 to 60 30
Over 60 ½ tank diameter
(C) In particular installations these provisions may be altered at the discretion of the Building and Safety Inspector after consideration of the special features such as topographical conditions; nature of occupancy and proximity to buildings on adjoining property and height and character of construction of such buildings; capacity and construction of proposed tanks and character of liquids to be stored; degree of private fire protection to be provided, and facilities of the Fire Department to cope with flammable liquid fires.
(D) Where two tank locations of diverse ownership have a common boundary, the Building and Safety Inspector may, with the written consent of the owners of the two properties substitute the distances provided in § 120.053 for the minimum distances set forth in the tables under this section.
('81 Code, § 5.40.130) Penalty, see Ch. 13