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TITLE 30ENVIRONMENTAL QUALITY
PART 1TEXAS COMMISSION ON ENVIRONMENTAL QUALITY
CHAPTER 334UNDERGROUND AND ABOVEGROUND STORAGE TANKS
SUBCHAPTER CTECHNICAL STANDARDS
RULE §334.45Technical Standards for New Underground Storage Tank Systems

(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.

    (A) Fittings. All metallic tank fittings (e.g., bung hole plugs) shall be protected from corrosion and shall be either:

      (i) isolated from the backfill material and groundwater or any other water;

      (ii) thoroughly coated with a suitable dielectric material, in accordance with the tank manufacturer's specifications; or

      (iii) cathodically protected in accordance with the applicable provisions in §334.49(c) of this title.

    (B) Striker plates. Factory-installed striker plates shall be located on the interior bottom surface of each tank under all fill and gauge openings.

    (C) Dielectric bushings or fittings. In order to provide electrical isolation of the tank from other connected metal components, all coated steel tanks equipped with either a factory-installed cathodic protection system or a factory-applied fiberglass-reinforced plastic laminate or cladding shall also be fitted with dielectric bushings or fittings at each tank opening where other metal UST system components are connected, except for unused openings closed with metal plugs and for openings where the connected component is non-metallic.

(c) Technical standards for new piping.

  (1) Piping design and construction. All new underground piping (including associated valves, fittings, and connectors) in a UST system shall be properly designed, constructed, and protected from corrosion in accordance with one of the methods listed in subparagraphs (A) - (D) 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 piping may be constructed of fiberglass-reinforced plastic. Piping constructed under this method shall meet the following standards:

      (i) UL Standard 971, "Standard for Nonmetallic Underground Piping For Flammable Liquids;" and

      (ii) ULC Standard S660, "Standard for Nonmetallic Underground Piping for Flammable and Combustible Liquids."

    (B) The piping may be constructed of coated steel. Piping constructed under this method shall be thoroughly coated with a suitable dielectric material, shall be cathodically protected with a field-installed cathodic protection system meeting the appropriate design and operational requirements in §334.49(c) of this title, and shall meet the applicable provisions of the following standards.

      (i) UL Standard 971A, "Outline of Investigation for Metallic Underground Fuel Pipe;"

      (ii) STI Recommended Practice R892, "Recommended Practice for Corrosion Protection of Underground Piping Networks Associated with Liquid Storage and Dispensing Systems;"

      (iii) American Petroleum Institute Publication 1632, "Cathodic Protection of Underground Storage Tanks and Piping Systems;"

      (iv) NACE International Standard Practice SP0169, "Control of External Corrosion on Underground or Submerged Metallic Piping Systems; and"

      (v) NACE International Standard Practice SP0285, "External Corrosion Control of Underground Storage Tank Systems by Cathodic Protection."

    (C) The piping may be constructed of flexible nonmetallic material. Piping constructed under this method shall meet the following standards:

      (i) UL Standard 971, "Standard for Nonmetallic Underground Piping For Flammable Liquids;" and

      (ii) ULC Standard S660, "Standard for Nonmetallic Underground Piping for Flammable and Combustible Liquids."

    (D) The piping may be designed, constructed, and protected from corrosion by an alternate method which has been reviewed and determined by the agency to prevent the release of any stored regulated substance in a manner that is no less protective of human health and the environment than the methods described in subparagraphs (A) and (B) of this paragraph. Any alternative methods must be submitted and approved in accordance with the procedures in §334.43 of this title.

  (2) Release detection for new piping. All new piping shall be monitored for releases of regulated substances in accordance with §334.50(b)(2) of this title.

  (3) Other new piping components.

Cont'd...

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