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Virginia Administrative Code
Title 9. Environment
Agency 25. State Water Control Board
Chapter 580. Underground Storage Tanks: Technical Standards and Corrective Action Requirements
12/10/2019

9VAC25-580-50. Performance Standards for New UST Systems.

Part II
UST Systems: Design, Construction, Installation, and Notification

In order to prevent releases due to structural failure, corrosion, or spills and overfills for as long as the UST system is used to store regulated substances, all owners and operators of new UST systems must meet the requirements in this section.

Tanks and piping installed or replaced on or after September 15, 2010, must be secondarily contained and use interstitial monitoring in accordance with subdivision 7 of 9VAC25-580-160, except for suction piping that meets the requirements of subdivisions 2 a (2) (a) through (e) of 9VAC25-580-140. Secondary containment must be able to contain regulated substances leaked from the primary containment until they are detected and removed and prevent the release of regulated substances to the environment at any time during the operational life of the UST system. For cases where the piping is considered to be replaced, the entire piping run must be secondarily contained.

1. Tanks. Each tank must be properly designed and constructed, and any portion underground that routinely contains product must be protected from corrosion, in accordance with a code of practice developed by a nationally recognized association or independent testing laboratory as specified below:

a. The tank is constructed of fiberglass-reinforced plastic;

NOTE: The following codes of practice may be used to comply with subdivision 1 a of this section:

(1) Underwriters Laboratories Standard 1316, Glass-Fiber-Reinforced Plastic Underground Storage Tanks for Petroleum Products, Alcohols, and Alcohol-Gasoline Mixtures; or

(2) Underwriter's Laboratories of Canada S615 Standard for Reinforced Plastic Underground Tanks for Flammable and Combustible Liquids.

b. The tank is constructed of steel and cathodically protected in the following manner:

(1) The tank is coated with a suitable dielectric material;

(2) Field-installed cathodic protection systems are designed by a corrosion expert;

(3) Impressed current systems are designed to allow determination of current operating status as required in subdivision 3 of 9VAC25-580-90; and

(4) Cathodic protection systems are operated and maintained in accordance with 9VAC25-580-90; or

NOTE: The following codes of practice may be used to comply with subdivision 1 b of this section:

(a) Steel Tank Institute Specification for STI-P3® Specification and Manual for External Corrosion Protection of Underground SteelStorage Tanks;

(b) Underwriters Laboratories Standard 1746, External Corrosion Protection Systems for Steel Underground Storage Tanks;

(c) Underwriters Laboratories of Canada S603, Standard for Steel Underground Tanks for Flammable and Combustible Liquids, and S603.1, Standard for External Corrosion Protection Systems for Steel Underground Tanks for Flammable and Combustible Liquids, and S631, Standard for Isolating Bushings for Steel Underground Tanks Protected with External Corrosion Protection Systems

(d) Steel Tank Institute Standard F841, Standard for Dual Wall Underground Steel Storage Tanks; or

(e) NACE International Standard Practice SP0285, External Corrosion Control of Underground Storage Tank Systems by Cathodic Protection, and Underwriters Laboratories Standard 58, Standard for Steel Underground Tanks for Flammable and Combustible Liquids.

c. The tank is constructed of steel and clad or jacketed with a noncorrodible material; or

NOTE: The following codes of practice may be used to comply with subdivision 1 c of this section:

(1) Underwriters Laboratories Standard 1746, External Corrosion Protection Systems for Steel Underground Storage Tanks;

(2) Steel Tank Institute ACT-100® Specification F894, Specification for External Corrosion Protection of FRP Composite Steel Underground Storage Tanks;

(3) Steel Tank Institute ACT-100-U® Specification F961, Specification for External Corrosion Protection of Composite Steel Underground Storage Tanks; or

(4) Steel Tank Institute Specification F922, Steel Tank Institute Specification for Permatank®.

d. The tank construction and corrosion protection are determined by the board to be designed to prevent the release or threatened release of any stored regulated substance in a manner that is no less protective of human health and the environment than subdivisions 1 a, 1 b, and 1 c of this section.

2. Piping. The piping that routinely contains regulated substances and is in contact with the ground must be properly designed, constructed, and protected from corrosion in accordance with a code of practice developed by a nationally recognized association or independent testing laboratory as specified below:

a. The piping is constructed of a noncorrodible material.

NOTE: The following codes of practice may be used to comply with subdivision 2 a of this section:

(1) Underwriters Laboratories Standard 971, Nonmetallic Underground Piping for Flammable Liquids; or

(2) Underwriters Laboratories of Canada Standard S660, Standard for Nonmetallic Underground Piping for Flammable and Combustible Liquids.

b. The piping is constructed of steel and cathodically protected in the following manner:

(1) The piping is coated with a suitable dielectric material;

(2) Field-installed cathodic protection systems are designed by a corrosion expert;

(3) Impressed current systems are designed to allow determination of current operating status as required in subdivision 3 of 9VAC25-580-90; and

(4) Cathodic protection systems are operated and maintained in accordance with 9VAC25-580-90; or

NOTE: The following codes of practice may be used to comply with subdivision 2 b of this section:

(a) American Petroleum Institute Recommended Practice 1632, Cathodic Protection of Underground Petroleum Storage Tanks and Piping Systems;

(b) Underwriters Laboratories Subject 971A, Outline of Investigation for Metallic Underground Fuel Pipe;

(c) Steel Tank Institute Recommended Practice R892, Recommended Practice for Corrosion Protection of Underground Piping Networks Associated with Liquid Storage and Dispensing Systems;

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

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

c. The piping construction and corrosion protection are determined by the board to be designed to prevent the release or threatened release of any stored regulated substance in a manner that is no less protective of human health and the environment than the requirements in subdivisions 2 a and 2 b of this section.

3. Spill and overfill prevention equipment.

a. Except as provided in subdivisions 3 b and 3 c of this section, to prevent spilling and overfilling associated with product transfer to the UST system, owners and operators must use the following spill and overfill prevention equipment:

(1) Spill prevention equipment that will prevent release of product to the environment when the transfer hose is detached from the fill pipe (for example, a spill catchment basin); and

(2) Overfill prevention equipment that will:

(a) Automatically shut off flow into the tank when the tank is no more than 95% full;

(b) Alert the transfer operator when the tank is no more than 90% full by restricting the flow into the tank or triggering a high-level alarm; or

(c) Restrict the flow 30 minutes prior to overfilling, alert the transfer operator with a high level alarm one minute before overfilling, or automatically shut off flow into the tank so that none of the fittings located on top of the tank are exposed to product due to overfilling.

b. Owners and operators are not required to use the spill and overfill prevention equipment specified in subdivision 3 a of this section if:

(1) Alternative equipment is used that is determined by the board to be no less protective of human health and the environment than the equipment specified in subdivision 3 a (1) or 3 a (2) of this section; or

(2) The UST system is filled by transfers of no more than 25 gallons at one time.

c. Flow restrictors used in vent lines may not be used to comply with subdivision 3 a (2) of this section when overfill protection is installed or replaced on or after January 1, 2018.

d. Spill and overfill protection equipment must be periodically tested or inspected in accordance with 9VAC25-580-82.

4. Installation.

a. The UST system must be properly installed in accordance with a code of practice developed by a nationally recognized association or independent testing laboratory and in accordance with the manufacturer's instructions.

b. Owners and operators must obtain a permit and the required inspections in accordance with the provisions of the Virginia Uniform Statewide Building Code (§ 36-97 et seq. of the Code of Virginia). No UST system shall be installed or placed into use without the owner and operator having obtained the required permit and inspections from the building official under the provisions of the Virginia Uniform Statewide Building Code.

In the case of state-owned facilities, the Department of General Services shall function as the building official in accordance with § 36-98.1 of the Code of Virginia.

In the case of federal facilities, the building official must be contacted. Owners and operators must obtain a permit and the required inspections must be issued in accordance with the provisions of the Virginia Uniform Statewide Building Code.

NOTE: Tank and piping system installation practices and procedures described in the following codes of practice may be used to comply with the requirements of subdivision 4 of this section:

(1) American Petroleum Institute Publication 1615, Installation of Underground Petroleum Storage System;

(2) Petroleum Equipment Institute Publication RP100, Recommended Practices for Installation of Underground Liquid Storage Systems; or

(3) National Fire Protection Association Standard 30, Flammable and Combustible Liquids Code and Standard 30A, Code for Motor Fuel Dispensing Facilities and Repair Garages.

NOTE: These industry codes require that prior to bringing the system into use the following tests be performed: (i) tank tightness test (air); (ii) pipe tightness test (air or hydrostatic); and (iii) precision system test.

5. Certification of installation. All owners and operators must ensure that one or more of the following methods of certification, testing, or inspection in subdivisions 5 a through 5 d of this section is performed, and a permit has been issued in accordance with the provisions of the Virginia Uniform Statewide Building Code to demonstrate compliance with subdivision 4 of this section. A certification of compliance on the UST Notification form must be submitted to the board in accordance with 9VAC25-580-70.

a. The installer has been certified by the tank and piping manufacturers;

b. The installation has been inspected and certified by a registered professional engineer with education and experience in UST system installation;

c. All work listed in the manufacturer's installation checklists has been completed; or

d. The owner and operator have complied with another method for ensuring compliance with subdivision 4 of this section that is determined by the board to be no less protective of human health and the environment.

6. Release detection. Release detection shall be provided in accordance with Part IV (9VAC25-580-130 et seq.) of this chapter.

7. Dispenser systems. Each UST system must be equipped with under-dispenser containment for any new dispenser system installed on or after September 15, 2010.

a. A dispenser system is considered new when both the dispenser and the equipment needed to connect the dispenser to the underground storage tank system are installed at an UST facility. The equipment necessary to connect the dispenser to the underground storage tank system includes check valves, shear valves, unburied risers or flexible connectors, or other transitional components that are underneath the dispenser and connect the dispenser to the underground piping.

b. Under-dispenser containment must be liquid-tight on its sides, bottom, and at any penetrations. Under-dispenser containment must allow for visual inspection and access to the components in the containment system or be periodically monitored for leaks from the dispenser system.

Statutory Authority

§§ 62.1-44.15 and 62.1-44.34:9 of the Code of Virginia; 42 USC § 6901 et seq.; 40 CFR Parts 280 and 281.

Historical Notes

Derived from VR680-13-02 § 2.1, eff. October 25, 1989; amended, Volume 20, Issue 12, eff. March 24, 2004; Volume 26, Issue 25, eff. September 15, 2010; Volume 34, Issue 01, eff. January 1, 2018; Errata, 34:4 VA.R. 503 October 16, 2017.

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