D.C. Mun. Regs. tit. 20, r. 20-5704

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

Rule 20-5704 - NEW PIPING FOR UST SYSTEMS

5704.1

Piping that routinely contains regulated substances and is in contact with earthen materials shall be properly designed and constructed, and protected from corrosion, in accordance with the following codes of practice, or an alternative industry standard or code of practice approved by the Department in accordance with § 5506:

(a) If the piping is non-corrodible material (such as fiberglass-reinforced plastic):

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

(2) Underwriters Laboratories of Canada Standard CAN/ULC S660, "Standard for Nonmetallic Underground Piping for Flammable and Combustible Liquids"; and

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

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

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

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

(4) NACE International Standard Practice SP 0169, "Control of External Corrosion on Underground or Submerged Metallic Piping Systems"; or

(5) NACE International Standard Practice SP 0285, "External Corrosion Control of Underground Storage Tank Systems by Cathodic Protection."

5704.2

UST system piping shall be constructed of:

(a) Non-corrodible material (such as fiberglass-reinforced plastic);

(b) Steel, which shall be cathodically protected in accordance with the requirements of this section and § 5901;

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

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

(2) The owner or operator maintains records that demonstrate compliance with requirements of § 5704.2(c)(1) for the remaining life of the piping; or

(d) Other materials approved by the Department in accordance with § 5704.7.

5704.3

Steel UST piping shall be cathodically protected by being coated with a suitable dielectric material, and:

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

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

5704.4

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

5704.5

Except as provided in § 5704.6, underground piping for hazardous substance USTs, and pressurized underground piping and non-safe suction piping for all petroleum USTs, shall be equipped with secondary containment features that are designed and constructed in accordance with the requirements of § 5701.4.

5704.6

Secondary containment is not required for vent pipes, Stage II vapor recovery pipes, or vertical fill pipes.

5704.7

Other materials and construction techniques may be used for UST piping if the piping construction and corrosion protection are determined by the Department, in accordance with § 5500.5, to be designed in a manner that is no less protective of human health and the environment than the other provisions of this section.

D.C. Mun. Regs. tit. 20, r. 20-5704

Final Rulemaking published at 40 DCR 7835, 7857 (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