Usually tanks at production area are placed in groups, called tank farms. The total capacity of one group consisting of aboveground storage tanks, as a rule, does not exceed 40,000 gl. For a group of underground tanks, the total capacity is not limited.
Aboveground and semi-underground tanks require a barrier of solid earthen rampart or a special fireproof wall. These measures are necessary to prevent the spread of oil spills on the territory of the base in case of emergency or any glitches.
Reservoirs within the farm are established at a well-defined distance. The minimum distance between two adjacent aboveground tanks should be more than the diameter of the larger reservoir. In turn, the distance between aboveground rectangular tanks shall be not less than half of the sum of the mutually perpendicular sides of the largest container.
The distance between the groups of tanks should be equal to two diameters of a larger group. It should be more than 50 ft between tank walls.
Quality improvement of fire safety measures made it possible to reduce fire break outs between the individual tanks and their groups, and also between the tanks and pump stations.
The location of tank farm is designed with a slope of not less than 0.004. for storm-water drainage.