What is the required number of barrels for small discharge containment when the diameter is more than 6 inches but not exceeding 12 inches?

The requirement for small discharge containment specifically outlines that for discharge diameters greater than 6 inches but not exceeding 12 inches, the necessary capacity for containment is three barrels. This regulation is designed to ensure that any potential spills or discharges are effectively managed, minimizing environmental impact and complying with safety protocols. The designation of three barrels reflects an understanding of not only the volume of potential discharge but also the need for adequate contingency planning to address the risk of spills from such discharge sizes.

In this context, while fewer barrels might be sufficient for smaller discharges, the regulations take into account the larger potential volume and associated risks with discharges in this particular range.