Current through all regulations passed and filed through March 18, 2024
(A)
Secondary containment systems shall be:
(1)
Designed,
installed, and operated to prevent any migration of materials or accumulated
liquid out of the system to the soil, ground water, or surface water at any
time during the use of the tank system; and
(2)
Capable of
detecting and collecting releases and accumulated liquids until the collected
material is removed.
[Comment: If the collected material is
a hazardous waste under Chapter 3745-51 of the Administrative Code, the
collected material is subject to management as a hazardous waste in accordance
with all applicable requirements of Chapters 3745-52, 3745-53, 3745-54 to
3745-57, 3745-65 to 3745-69, 3745-205, 3745-256, 3745-266, and 3745-270 of the
Administrative Code. If the collected material is discharged through a point
source to waters of the United States, the collected material is subject to the
requirements of Section 301, Section 304, and Section 402 of the Clean Water
Act. If discharged to a publicly owned treatment works (POTW), the collected
material is subject to the requirements of Section 307 of the Clean Water Act.
If the collected material is released to the environment, the collected
material may be subject to the reporting requirements of
40 CFR Part
302.]
(B)
To meet the
requirements of paragraph (A) of this rule, secondary containment systems shall
be, at a minimum:
(1)
Constructed of or lined with materials that are
compatible with the materials to be placed in the tank system and shall have
sufficient strength and thickness to prevent failure owing to pressure
gradients (including static head and external hydrological forces), physical
contact with the material to which the tank system is exposed, climatic
conditions, and the stress of daily operation (including stresses from nearby
vehicular traffic);
(2)
Placed on a foundation or base capable of providing
support to the secondary containment system, resistance to pressure gradients
above and below the tank system, and capable of preventing failure due to
settlement, compression, or uplift;
(3)
Provided with a
leak-detection system that is designed and operated so that the leak detection
system will detect the failure of either the primary or secondary containment
structure or the presence of any release of hazardous secondary material or
accumulated liquid in the secondary containment system at the earliest
practicable time; and
(4)
Sloped or otherwise designed or operated to drain and
remove liquids resulting from leaks, spills, or precipitation. Spilled or
leaked material and accumulated precipitation shall be removed from the
secondary containment system within twenty-four hours, or in as timely a manner
as is possible to prevent harm to human health and the
environment.
(C)
Secondary containment for tanks shall include one or
more of the following devices:
(1)
A liner (external to the tank);
(2)
A vault;
or
(3)
A double-walled tank.
(D)
In addition to
the requirements of paragraphs (A), (B), and (C) of this rule, secondary
containment systems shall satisfy the following requirements:
(1)
External liner
systems shall be:
(a)
Designed or operated to contain one hundred per cent of
the capacity of the largest tank within the boundary of the external liner
system;
(b)
Designed or operated to prevent run-on or infiltration
of precipitation into the secondary containment system unless the collection
system has sufficient excess capacity to contain run-on or infiltration. Such
additional capacity shall be sufficient to contain precipitation from a
twenty-five-year, twenty-four-hour rainfall event;
(c)
Free of cracks or
gaps; and
(d)
Designed and installed to surround the tank completely
and to cover all surrounding earth likely to come into contact with the
material if the material is released from the tanks (i.e., capable of
preventing lateral as well as vertical migration of the
material).
(2)
Vault systems shall be:
(a)
Designed or
operated to contain one hundred per cent of the capacity of the largest tank
within the boundary of the vault system;
(b)
Designed or
operated to prevent run-on or infiltration of precipitation into the secondary
containment system unless the collection system has sufficient excess capacity
to contain run-on or infiltration. Such additional capacity shall be sufficient
to contain precipitation from a twenty-five-year, twenty-four-hour rainfall
event;
(c)
Constructed with chemical-resistant water stops in
place at all joints (if any);
(d)
Provided with an
impermeable interior coating or lining that is compatible with the stored
material and that will prevent migration of material into the
concrete;
(e)
Provided with a means to protect against the formation
of and ignition of vapors within the vault, if the material being stored or
treated is ignitable or reactive; and
(f)
Provided with an
exterior moisture barrier or be otherwise designed or operated to prevent
migration of moisture into the vault if the vault is subject to hydraulic
pressure.
(3)
Double-walled tanks shall be:
(a)
Designed as an
integral structure (i.e., an inner tank completely enveloped within an outer
shell) so that any release from the inner tank is contained by the outer
shell;
(b)
Protected, if constructed of metal, from both corrosion
of the primary tank interior and of the external surface of the outer shell;
and
(c)
Provided with a built-in continuous leak detection
system capable of detecting a release within twenty-four hours, or at the
earliest practicable time.
[Comment: The provisions outlined in
the steel tank institute's (STI) "Standard for Dual Wall Underground Steel
Storage Tanks" may be used as guidelines for aspects of the design of
underground steel double-walled tanks.]
(F)
Ancillary equipment shall be provided with secondary
containment (e.g., trench, jacketing, double-walled piping) that meets the
requirements of paragraphs (A) and (B) of this rule except for:
(1)
Aboveground
piping (exclusive of flanges, joints, valves, and other connections) that are
visually inspected for leaks on a daily basis;
(2)
Welded flanges,
welded joints, and welded connections that are visually inspected for leaks on
a daily basis;
(3)
Sealless or magnetic coupling pumps and sealless valves
that are visually inspected for leaks on a daily basis; and
(4)
Pressurized
aboveground piping systems with automatic shut-off devices (e.g., excess flow
check valves, flow metering shutdown devices, loss of pressure actuated
shut-off devices) that are visually inspected for leaks on a daily basis.
[Comment: For dates of non-regulatory
government publications, publications of recognized organizations and
associations, federal rules, and federal statutory provisions referenced in
this rule, see rule
3745-50-11 of the Administrative
Code titled "Incorporated by reference."]