| (B) Impressed current cathodic protection systems shall
be designed and equipped with appropriate equipment or devices capable
of indicating the operational status of the system at all times.
(C) In addition to the standard inspection and testing
requirements for all cathodic protection systems required in paragraph
(4) of this subsection, all impressed current cathodic protection
systems shall be regularly inspected by the owner or operator (or
the owner's designated representative) to ensure that the rectifier
and other system components are operating properly. Such inspections
shall be performed at least once every 60 days.
(3) Test stations and connections. To allow for the
periodic testing required in paragraph (4) of this subsection, any
factory-installed or field-installed cathodic protection system shall
include appropriate connections, insulated lead wires, and accessible
test stations. All lead wires connected to the tanks, anodes, reference
electrodes, and other components associated with the cathodic protection
system shall terminate at one or more test stations. The termination
of each lead wire at a test station shall be clearly labeled or coded
to properly identify the specific component to which it is connected.
(4) Inspection and testing requirements for all cathodic
protection systems.
(A) Except as provided in subsection (d)(2) of this
section, all cathodic protection systems which are used to provide
corrosion protection for any component of a UST system shall be inspected
and tested to determine the adequacy of the cathodic protection by
a qualified corrosion specialist or corrosion technician in accordance
with the requirements in this paragraph.
(B) The inspection and testing criteria used to determine
the adequacy of the cathodic protection shall be in accordance with
a code or standard of practice developed by a nationally recognized
corrosion association or independent testing laboratory, such as:
(i) NACE International Test Method TM0101, "Measurement
Techniques Related to Criteria for Cathodic Protection of Underground
Storage Tank Systems or Submerged Metallic Tank Systems;"
(ii) NACE International Test Method TM0497, "Measurement
Techniques Related to Criteria for Cathodic Protection on Underground
or Submerged Metallic Piping Systems;"
(iii) Steel Tank Institute Recommended Practice R051, "Cathodic
Protection Testing Procedures for sti-P3 USTs;"
(iv) NACE International Standard Practice SP0285, "Corrosion
Control of Underground Storage Tank Systems by Cathodic Protection;"
or
(v) NACE International Standard Practice SP0169, "Control
of External Corrosion on Underground or Submerged Metallic Piping
Systems."
(C) All cathodic protection systems shall be inspected
and tested for operability and adequacy of protection within three
to six months after installation and at a subsequent frequency of
at least once every three years.
(d) Requirements for other corrosion protection methods.
(1) Electrically isolated components.
(A) Except for jacketed tanks meeting the requirements
of §334.45(b)(1)(F) of this title, any metal component of a UST
system which is protected from corrosion by one of the electrical
isolation methods described in subsection (b)(2) and (3) of this section,
and which is not equipped with a cathodic protection system, shall
be periodically inspected and tested to ensure that the metal component
remains electrically isolated from the surrounding soil, backfill,
groundwater or any other water, and from other metal components in
accordance with one or more of the following procedures.
(i) When visual inspection is possible, the entire
exterior surface of such component may be thoroughly inspected visually
by qualified personnel for the presence of corrosion or released regulated
substances.
(ii) If visual inspection is not possible, the component
may be inspected and tested by a qualified corrosion technician or
by a qualified corrosion specialist by taking structure to soil voltage
readings in accordance with procedures established by a code or standard
of practice developed by a nationally recognized association or independent
testing laboratory.
(iii) The component may be inspected and/or tested
by an alternative method which has been reviewed and determined by
the agency to ascertain electrical isolation and to 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 clauses (i) and (ii) of this subparagraph,
in accordance with the procedures in §334.43 of this title.
(B) The inspections and tests required in subparagraph
(A) of this paragraph shall be conducted within three to six months
after installation of the metal component, and then once every three
years thereafter for the remaining operational life of the UST system.
(C) If the tests required in subparagraph (A) of this
paragraph indicate that the metal component is no longer electrically
isolated from the surrounding soil, backfill, groundwater or any other
water, or from other metal components, a qualified corrosion specialist
shall review the test results and thoroughly inspect the area of the
metal component to ascertain the extent of electrical isolation and
corrosion protection for the component.
(D) If the qualified corrosion specialist determines
that the metal component is no longer adequately protected from corrosion,
the owner or operator shall assure that one or more of the following
procedures are completed within 60 days of the date of such determination:
(i) appropriate repairs or modifications shall be made
to restore the electrical isolation of the protected component; or
(ii) a field-installed cathodic protection system meeting
the requirements of subsection (c)(2) of this section shall be installed.
(2) Dual-protected tanks. If a steel/fiberglass-reinforced
plastic composite tank, a steel tank with a bonded fiberglass-reinforced
plastic external cladding or laminate, a steel tank with a bonded
fiberglass reinforced polyurethane coating, or a steel tank with a
bonded polyurethane coating is also equipped with a factory-installed
cathodic protection system, then the normal inspection and testing
requirements for cathodic protection systems in subsection (c)(4)
of this section may be waived. This paragraph shall be applicable
only to tanks meeting the design and construction requirements in §334.45(b)(1)(D)
or (E) of this title, as applicable, and when such tanks are fitted
with factory-installed cathodic protection systems meeting the requirements
of subsection (c)(1) of this section.
(e) Corrosion protection records.
(1) Owners and operators shall maintain all corrosion
protection records required in this subsection in accordance with
the requirements in §334.10(b) of this title.
(2) Owners and operators shall maintain records adequate
to demonstrate compliance with the corrosion protection requirements
in this section, and in accordance with the following minimum requirements.
(A) All appropriate installation records related to
the corrosion protection system, as listed in §334.46(i) of this
title, shall be maintained for as long as the corrosion protection
system is used, including:
(i) the name, address, telephone number, and corrosion
protection credentials of either the company which designed the factory-installed
cathodic protection system or the corrosion specialist who designed
the field-installed cathodic protection system, as applicable;
(ii) drawings or plans depicting the locations of all
cathodic protection system components, including the locations of
all test stations; and
(iii) operating instructions and warranty information,
maintenance schedules, and testing procedures for all operational
components of the cathodic protection systems.
(B) The following corrosion protection records shall
be maintained for at least five years after the applicable test or
inspection is conducted:
(i) results of all tests and inspections of any impressed
current cathodic protection system conducted in accordance with subsection
(c)(2)(C) of this section; and
(ii) results of all tests and inspections of the adequacy
of any cathodic protection system conducted in accordance with subsection
(c)(4) of this section; and
(iii) results of all tests and inspections to assure
corrosion protection for electrically isolated components in accordance
with subsection (d)(1) of this section.
|
| Source Note: The provisions of this §334.49 adopted to be effective September 29, 1989, 14 TexReg 4714; amended to be effective January 2, 1995, 19 TexReg 10104; amended to be effective November 23, 2000, 25 TexReg 11442; amended to be effective October 30, 2008, 33 TexReg 8790; amended to be effective March 17, 2011, 36 TexReg 1675; amended to be effective May 31, 2018, 43 TexReg 3390 |
