Mich. Admin. Code R. 285.641.8 - Alternative to diking for storage containers
Rule 8.
(1) An
individual storage container that does not have a capacity of more than 3,000
gallons may be contained within a secondary storage container, that is, an
elephant ring, instead of a diked containment area.
(2) A storage facility shall ensure that both
the primary storage container and the elephant ring are fabricated of material
that is compatible with each other and with the fertilizer that is being
stored.
(3) A storage facility
shall ensure that the height of the elephant ring wall is not more than 4
feet.
(4) A storage facility shall
ensure that the volume that is contained within the secondary storage walls up
to the working height of the elephant ring is sufficient to contain 110% of the
volume that is contained in the primary storage container plus the volume that
is displaced by the footings of any equipment which is placed within the
secondary containment vessel.
(5) A
storage facility shall ensure that the elephant ring is free of leaks and
structural defects. A storage facility shall ensure that the base is protected
from corrosion, both from inside and outside, and is underlaid with a concrete
pad or with 8 inches of compacted gravel beneath 4 inches of compacted sand or
clay or is protected as recommended by the manufacturer of the elephant ring
and as approved by the department.
(6) A storage facility shall ensure that all
piping connections to the primary storage container are made over the wall of
the elephant ring and are adequately supported and braced. A storage facility
shall ensure that pumps and other fixtures, if located within the elephant ring
containment structure, are placed on an elevated platform or otherwise
protected from water accumulation.
(7) A storage facility shall ensure that
accumulations of storm water and other material are pumped over the wall of the
elephant ring by means of a pump within the secondary container or by means of
an exterior portable pump and are disposed of in accordance with R
285.641.10(2).
(8) A storage
facility shall fully comply with the provisions of this rule 2 years after the
effective date of this rule.
Notes
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