What is the required capacity of dikes containing storage tanks?

The requirement for the capacity of dikes containing storage tanks is to ensure that they can adequately handle any potential spills or overflows. By choosing the capacity of the largest tank plus the displacement of other contents stored, the design accounts for both the maximum possible spill from the largest tank and any additional liquid that could be displaced if other tanks were to overflow or spill. This ensures a comprehensive safety measure that addresses worst-case scenarios, minimizing the risk of environmental contamination.

In this context, it is crucial to consider both the volume of the largest tank and the extra capacity needed for other substances being stored. This approach provides a robust safeguard, ensuring that the dike system can manage unexpected incidents effectively. The regulation reflects a preventive strategy rather than just a reactionary one, emphasizing the importance of planning for all possible scenarios in the storage and handling of hazardous materials.