| (a) General requirements.
(1) Any new underground storage tank (UST) system installed
on or after September 29, 1989, shall be in compliance with the provisions
of this section during the entire operational life of the UST system.
(2) Any new UST system shall be designed, installed,
and operated in a manner that will prevent releases due to structural
failure or corrosion for the operational life of the UST system.
(3) The surfaces of all components of the new UST system
which are in direct contact with a regulated substance shall be constructed
of or lined with materials that are compatible with such regulated
substances.
(4) All components of the new UST system which convey,
contain, or store regulated substances shall be properly protected
from corrosion in accordance with the applicable provisions in §334.49
of this title (relating to Corrosion Protection).
(5) All tanks, piping, and other ancillary equipment
in a new UST system shall be installed in accordance with the requirements
of §334.46 of this title (relating to Installation Standards
for New Underground Storage Tank Systems).
(b) Technical standards for new tanks.
(1) Tank design and construction. Each new tank shall
be properly designed, constructed, and protected from corrosion in
accordance with one or more of the methods listed in subparagraphs
(A) - (G) of this paragraph, and in accordance with specific codes
and standards of practice developed by nationally recognized associations
and independent testing laboratories, as referenced in the following
subparagraphs:
(A) The tank may be constructed of fiberglass-reinforced
plastic. Tanks constructed under this method shall meet an industry
code of practice such as:
(i) Underwriters Laboratories, Inc. (UL) Standard 1316, "
Glass-Fiber-Reinforced Plastic Underground Storage Tanks for Petroleum
Products, Alcohols, and Alcohol-Gasoline Mixtures;" or
(ii) Underwriter's Laboratories of Canada (ULC) S615, "Standard
for Fibre Reinforced Plastic Underground Tanks for Flammable and Combustible
Liquids."
(B) The tank may be constructed of coated steel and
equipped with a factory-installed cathodic corrosion protection system.
Any tank constructed under this method shall be thoroughly coated
with a suitable dielectric material, shall be equipped with a factory-installed
cathodic corrosion protection system meeting the appropriate design
and operational requirements in §334.49(c)(1) of this title,
and shall meet an industry code of practice such as:
(i) UL Standard 58, "Standard for Steel Underground
Tanks for Flammable and Combustible Liquids;"
(ii) Part I of UL Standard 1746, "Standard for
External Corrosion Protection Systems For Steel Underground Storage
Tanks;" or
(iii) Steel Tank Institute (STI) Standard, " sti-P3 Specification and Manual for External Corrosion
Protection of Underground Steel Storage Tanks."
(C) The tank may be constructed of coated steel and
equipped with a field-installed cathodic corrosion protection system.
Any tank constructed under this method shall be thoroughly coated
with a suitable dielectric material, shall be equipped with a field-installed
cathodic protection system meeting the appropriate design and operational
requirements in §334.49(c)(2) of this title, and shall meet the
following standards:
(i) UL Standard 58, "Standard for Steel Underground
Tanks for Flammable and Combustible Liquids;" and
(ii) NACE International Standard SP0285, "External
Corrosion Control of Underground Storage Tank Systems by Cathodic
Protection."
(D) The tank may be factory-constructed either as a
steel/fiberglass-reinforced plastic composite tank, or as a steel
tank with a bonded fiberglass-reinforced plastic external cladding
or as a steel tank with a bonded fiberglass reinforced polyurethane
coating. Any tank constructed under this method is not required to
be equipped with a cathodic protection system, provided that the tank
meets the following requirements:
(i) The tank shall be equipped with a factory-applied
external fiberglass-reinforced plastic or fiberglass reinforced polyurethane
cladding or laminate which has a total dry film thickness of 100 mils
minimum and 125 mils nominal;
(ii) The tank shall be operated and maintained in accordance
with the requirements of §334.49 of this title;
(iii) The tank shall be electrically isolated from
all other metallic structures by use of dielectric bushings or other
appropriate methods utilized in accordance with applicable industry
standards; and
(iv) The tank shall be designed and fabricated in accordance
with one or more of the following standards:
(I) Part II of UL Standard 1746, "Standard for
External Corrosion Protection Systems For Steel Underground Storage
Tanks;"
(II) STI ACT-100, "Specification for External
Corrosion Protection of FRP Composite Steel Underground Storage Tanks;"
or
(III) any other UL, STI, or ULC standard which incorporates
the requirements contained in the standards listed in either subclause
(I) or (II) of this clause.
(E) The tank may be factory-constructed as a steel
tank with a bonded polyurethane external coating. Any tank constructed
under this method is not required to be equipped with a cathodic protection
system, provided that the tank meets the following requirements:
(i) The tank shall be equipped with a factory-applied
external polyurethane coating which has a minimum dry film thickness
of 70 mils;
(ii) The tank shall be operated and maintained in accordance
with the applicable requirements of §334.49 of this title;
(iii) The tank shall be electrically isolated from
all other metallic structures by use of dielectric bushings or other
appropriate methods utilized in accordance with applicable industry
standards; and
(iv) The tank shall be designed and fabricated in accordance
with one or more of the following standards:
(I) Part IV of UL Standard 1746, "Standard for
External Corrosion Protection Systems For Steel Underground Storage
Tanks;"
(II) STI ACT-100-U, "Specification for External
Corrosion Protection of Composite Steel Underground Storage Tanks;"
or
(III) any other UL, STI, or ULC standard which incorporates
the requirements contained in the standards listed in either subclause
(I) or (II) of this clause.
(F) The tank may be factory-constructed as a steel
tank completely contained within a nonmetallic external tank jacket.
Any tank constructed under this method is not required to be equipped
with a cathodic protection system, provided that the tank meets the
following requirements:
(i) The tank shall be equipped with a factory-constructed
nonmetallic external jacket which provides both secondary containment
and corrosion protection;
(ii) The tank shall be operated and maintained in accordance
with the applicable requirements of §334.49 of this title;
(iii) The tank shall be electrically isolated from
all other metallic structures by use of dielectric bushings or other
appropriate methods utilized in accordance with applicable industry
standards; and
(iv) The tank shall be designed and fabricated in accordance
with the following:
(I) Part III of UL Standard 1746, "Standard for
External Corrosion Protection Systems For Steel Underground Storage
Tanks;" or
(II) STI Specification F922, "Steel Tank Institute
Specification for Permatank;" or
(III) any other UL, STI, or ULC standard which incorporates
the requirements contained in the standard listed in subclause (I)
or (II) of this clause.
(G) The tank may be designed, constructed, and protected
from corrosion by an alternate method which has been reviewed and
determined by the agency to control corrosion and prevent the release
or threatened release of any stored regulated substance in a manner
that is no less protective of human health and safety and the environment
than the methods described in subparagraphs (A) - (F) of this paragraph,
in accordance with the procedures in §334.43 of this title (relating
to Variances and Alternative Procedures).
(2) Spill and overfill prevention equipment. All new
tanks shall be equipped with spill and overfill prevention equipment,
in accordance with §334.51(b) of this title (relating to Spill
and Overfill Prevention and Control).
(3) Release detection for new tanks. All new tanks
shall be monitored for releases of regulated substances in accordance
with §334.50 of this title (relating to Release Detection).
(4) Other new tank components.
Cont'd... |
