D.C. Mun. Regs. tit. 20, r. 20-5701

Current through Register Vol. 72, No. 2, January 10, 2025

Rule 20-5701 - NEW PETROLEUM UST SYSTEMS

5701.1

Each new petroleum UST, except for a heating oil tank, shall be constructed of:

(a) Fiberglass-reinforced plastic with double-walled construction or other secondary containment system as set forth in §§ 5701.4 through 5701.6;

(b) Steel that is clad or jacketed with a non-corrodible material (such as fiberglass-reinforced plastic composite) with double-walled construction or other secondary containment system as set forth in §§ 5701.4 through 5701.6;

(c) Steel that is cathodically protected in accordance with §§ 5701.2 and 5701.3 with double-walled construction or other secondary containment system as set forth in §§ 5701.4 through 5701.6;

(d) Metal without additional corrosion protection measures; provided that:

(1) The tank is installed at a facility that is determined by a corrosion expert not to be corrosive enough to cause the tank to have a release due to corrosion during its operating life; and

(2) The owners and operators maintain records that demonstrate compliance with requirements of § 5701.1(d)(1) for the remaining life of the tank; or

(e) Other materials, if the tank 's construction and corrosion protection are, as determined by the Department, in accordance with § 5500.5, 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 other provisions of this section.

5701.2

Each steel tank that is cathodically protected shall be coated with a suitable dielectric material, and:

(a) The field- installed cathodic protection systems shall be designed by a corrosion expert; and

(b) The impressed current cathodic protection systems shall be designed to allow determination of current operating status as required by § 5901.5.

5701.3

Each cathodic protection system shall be operated and maintained in accordance with § 5901.

5701.4

Secondary containment systems shall be designed, constructed, and installed to do the following:

(a) Contain regulated substances released from the tank system until they are detected and removed;

(b) Prevent the release of regulated substances to the environment at any time during the operational life of the UST; and

(c) Check for evidence of a release at least every thirty (30) days.

5701.5

If continuous monitoring methods are not used, each secondary containment system shall be tested every three (3) years to ensure that the interstitial area is liquid -tight.

5701.6

Double-walled tanks shall be designed, constructed, and installed in a manner that will:

(a) Contain a release from any portion of the inner tank within the outer wall; and

(b) Provide for the detection of the failure of the inner wall.

5701.7

External liner systems, including vaults, shall be designed, constructed, and installed in a manner that will:

(a) Contain one hundred ten percent (110%) of the capacity of the largest tank within its boundary;

(b) Prevent precipitation or groundwater intrusion from interfering with the ability to contain or detect a release of regulated substances; and

(c) Surround the tank completely and be capable of preventing both lateral and vertical migration of regulated substances.

5701.8

All new motor fuel dispenser systems shall be equipped with an under-dispenser containment system that is designed, constructed, and installed in a manner that will prevent leaks from the dispenser from reaching soil or groundwater, and shall:

(a) Be liquid-tight on its sides, bottom, and at any penetrations;

(b) Be compatible with the substance conveyed by the piping; and

(c) Allow for visual inspection and access to the components in the containment system, or be monitored to detect a failure of the under-dispenser containment and any leaks from the dispenser.

5701. 9

A dispenser system is considered new when both the dispenser and the equipment needed to connect the dispenser to the UST system are installed. The equipment necessary to connect the dispenser to the UST system includes check valves, shear valves, unburied risers, flexible connectors, and other transitional components that are below the dispenser and connect the dispenser to the underground piping.

5701.10

The following codes of practice may be used to comply with § 5701.1:

(a) If the tank is constructed of fiberglass reinforced plastic:

(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 Standard CAN/ULC S615, "Standard for Reinforced Plastic Underground Tanks for Flammable and Combustible Liquids".

(b) If the tank is constructed of steel and cathodically protected:

(1) Steel Tank Institute STI-P3, "Specification and Manual for External Corrosion Protection of Underground Steel Storage Tanks";

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

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

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

(5) NACE International Standard Practice SP 0285, "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) If the tank is steel, and clad or jacketed with a non-corrodible material:

(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 F961-15, "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.C. Mun. Regs. tit. 20, r. 20-5701

Final Rulemaking published at 40 DCR 7835, 7853 (November 12, 1993); as amended by Final Rulemaking published at 46 DCR 7699 (October 1, 1999); as amended by Final Rulemaking published at 56 DCR 6678 (August 21, 2009); amended by Final Rulemaking published at 67 DCR 1778 (2/21/2020)

Authority: District of Columbia Underground Storage Tank Management Act of 1990, effective March 8, 1991, D.C. Law 8-242, D.C. Official Code, § 8-113.01 et seq. (2008 Repl.), as amended, and Mayor's Order 2006-61, dated June 14, 2006