Remote Impounding

REMOTE IMPOUNDING means that the spilled liquid is drained to a remote collecting area so the liquid will not be held against the tanks. If this is the choice used to protect adjoining property and waterways, the system must comply with the following regulations:

  1. A slope of not less than 1% away from the tank must be maintained for at least 50 ft toward the collecting area.

  2. The collecting area must have a capacity greater or equal to the volume of the largest tank that might drain into it.

  3. The route of the drainage system must be located such that should liquid in the drainage system ignite, the resulting fire will not seriously expose the tanks or nearby property.

  4. The collection area must be located so that, when it is filled to capacity, the liquid level will not be closer than 50 ft to any property line that is built on, or can be built on in the future, or from any tank.

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