§ 8.20.020. Diking and flareback requirements generally.

A.

No storage tank for flammable liquids shall be located aboveground having a capacity for more than four thousand gallons of class A liquid or five thousand gallons of class B liquid, unless enclosed within a metal, reinforced-concrete, clay-core or earthen dike not higher than one-half the amount of the highest tank enclosed, forming an impoundment area not less than the capacity of the largest tank plus ten percent of the aggregate capacity of all other tanks within the impoundment area.

B.

A dike surrounding a tank containing fluid susceptible to a boilover shall form an impoundment area having a capacity of not less than one hundred twenty-five percent of the capacity of the tank or group of tanks surrounded.

C.

Tanks containing fluid susceptible to boilover shall be equipped at the top with a flareback section designed to turn back a boilover wave.

D.

The total gallonage of a group of tanks to be enclosed in any group of tanks to be enclosed in any one diked area shall not exceed six million three hundred thousand gallons, and any single tank in excess of this amount shall be separately diked.

(C.O.78-1061 § 1 (part): prior revision § 7-42 (part))