When two or more tanks are located in a common diked area, intermediate dikes shall be provided to hold at least what percent?

When two or more tanks are located in a common diked area, intermediate dikes shall be provided to hold at least what percent?

• A. 5
• B. 15
• C. 20
• D. 10

Answer: (D)

Containment design for multiple tanks relies on dividing the shared diked area into compartments so a spill can be contained locally rather than propagating to the outer boundary. When two or more tanks share a common diked area, intermediate dikes must be provided to hold at least ten percent of the capacity of the largest tank in that area. This small but important buffer creates a safe hold space that can contain a leak from one tank long enough to detect the release and take action, reducing the risk of a larger spill breaching the outer containment. For example, if the largest tank in the area holds 100,000 gallons, the intermediate dikes should be capable of containing at least 10,000 gallons. The other percentage options are not specified requirements and would imply different containment scales than what is defined, so ten percent is the standard rule.

Containment design for multiple tanks relies on dividing the shared diked area into compartments so a spill can be contained locally rather than propagating to the outer boundary. When two or more tanks share a common diked area, intermediate dikes must be provided to hold at least ten percent of the capacity of the largest tank in that area. This small but important buffer creates a safe hold space that can contain a leak from one tank long enough to detect the release and take action, reducing the risk of a larger spill breaching the outer containment. For example, if the largest tank in the area holds 100,000 gallons, the intermediate dikes should be capable of containing at least 10,000 gallons. The other percentage options are not specified requirements and would imply different containment scales than what is defined, so ten percent is the standard rule.