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:
- A slope of not less than 1% away from the tank must be
maintained for at least 50 ft toward the collecting area.
- The collecting area must have a capacity greater or equal to the
volume of the largest tank that might drain into it.
- 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.
- 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.