Mich. Admin. Code R. 285.640.9 - Alternative to diking for storage containers
Rule 9.
(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) Both the primary storage container and
the elephant ring shall be fabricated of material that is compatible with each
other and with the pesticide that is being stored.
(3) The height of the elephant ring wall
shall not be more than 4 feet.
(4)
The volume that is contained within the secondary storage walls up to the
working height of the elephant ring shall be 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)
The elephant ring shall be free of leaks and structural defects. The base shall
be protected from corrosion, both from inside and outside, and shall be
underlaid with a concrete pad or with 8 inches of compacted gravel beneath 4
inches of compacted sand or clay, or shall be protected as recommended by the
manufacturer of the elephant ring and approved by the department.
(6) All piping connections to the primary
storage container shall be made over the wall of the elephant ring and shall be
adequately supported and braced. Pumps and other fixtures, if located within
the elephant ring containment structure, shall be placed on an elevated
platform or otherwise protected from water accumulation.
(7) Accumulations of storm water and other
material shall be 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
shall be disposed of in accordance with the provisions of R
285.640.11(2).
(8) A maximum of 3
elephant rings per bulk storage facility will be permitted.
(9) Full compliance with the provisions of
this rule is required 1 year after the effective date of this rule.
Notes
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