(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.]
(E)
[Reserved.]
(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."]
