Each single dike wall enclosure shall have a capacity equal to what percent of the tank's capacity?

Each single dike wall enclosure shall have a capacity equal to what percent of the tank's capacity?

• A. 110
• B. 100
• C. 90
• D. 120

Answer: (A)

Sizing the containment for a single-dike enclosure is about ensuring there’s enough space to hold the tank’s contents plus a reasonable spill and any incidental water that might collect. The required capacity is 110% of the tank’s capacity. That extra 10% provides a margin for spills and for rainfall or other water that could accumulate in the diked area, helping prevent releases to the environment. Using just 100% would leave no room for any spill or accumulation, and 90% would be even less adequate. A 110% figure strikes a practical balance between safety and cost for a single-tank enclosure.

Sizing the containment for a single-dike enclosure is about ensuring there’s enough space to hold the tank’s contents plus a reasonable spill and any incidental water that might collect. The required capacity is 110% of the tank’s capacity. That extra 10% provides a margin for spills and for rainfall or other water that could accumulate in the diked area, helping prevent releases to the environment. Using just 100% would leave no room for any spill or accumulation, and 90% would be even less adequate. A 110% figure strikes a practical balance between safety and cost for a single-tank enclosure.