The required capacity of a single dike enclosure is what percent of the associated tank's capacity?

The required capacity of a single dike enclosure is what percent of the associated tank's capacity?

• A. 100
• B. 110
• C. 120
• D. 130

Answer: (B)

Containment sizing for a single dike around a tank is set to 110% of the largest tank’s capacity. This extra margin gives room to hold not only the full contents of the largest tank but also a small additional volume that could be released in a spill, plus allowances for slosh and potential rainfall within the dike area. The 110% figure ensures that even during a spill event, the oil remains contained inside the dike and does not escape to the surrounding environment. Using 100% would leave no margin for spillor slosh, while 120% or 130% exceeds the standard requirement for a single enclosure.

Containment sizing for a single dike around a tank is set to 110% of the largest tank’s capacity. This extra margin gives room to hold not only the full contents of the largest tank but also a small additional volume that could be released in a spill, plus allowances for slosh and potential rainfall within the dike area. The 110% figure ensures that even during a spill event, the oil remains contained inside the dike and does not escape to the surrounding environment. Using 100% would leave no margin for spillor slosh, while 120% or 130% exceeds the standard requirement for a single enclosure.