5507.1 Except as specifically provided otherwise in this section, each owner and operator of an UST system with field-constructed tanks or airport hydrant system shall comply with the UST Regulations.
5507.2 For each UST system with field-constructed tanks or airport hydrant system installed on or before February 21, 2020, the requirements are effective according to the following schedule:
(a) Requirements regarding UST system upgrades, general operating requirements, operator training, and release detection shall be effective October 13, 2021; and(b) Requirements regarding release reporting, response, investigation, closure, financial responsibility and notification, except the one-time notification requirement under § 5507.4, shall be effective on February 21, 2020.5507.3 For each UST system with field-constructed tanks or airport hydrant system installed after February 21, 2020, the requirements apply at installation.
5507.4 Not later than October 13, 2021, each owner of an UST system with field-constructed tanks or airport hydrant system shall notify the Department of the system using an UST facility notification form described in § 5600 and shall demonstrate compliance with Chapter 67.
5507.5 In addition to the codes of practice listed in § 5701.10, each owner or operator may use military construction criteria, such as Unified Facilities Criteria (UFC) 3-460-01, Petroleum Fuel Facilities, when designing, constructing, and installing UST systems with field-constructed tanks and airport hydrant systems.
5507.6 An owner or operator may use single-walled piping when installing or replacing piping associated with an airport hydrant system, or UST system with a field-constructed tank that has a capacity greater than fifty thousand (50,000) gallons. Piping associated with an US T system with a field-constructed tank with a capacity less than or equal to fifty thousand (50,000) gallons that is not part of an airport hydrant system shall meet the secondary containment requirements in Chapter 57 when installed or replaced.
5507.7 Not later than October 13, 2021, each owner or operator of an UST system with field-constructed tanks or airport hydrant system, installed on or before February 21, 2020, shall upgrade the UST system as follows, or permanently close the UST system pursuant to Chapter 61:
(a) UST system components in contact with the ground that routinely contain regulated substances shall: (1) Comply with the UST performance standards for new tanks and piping in Chapter 57; or(2) Be constructed of metal and cathodically protected according to a code of practice developed by a nationally recognized association or independent testing laboratory as specified in § 5507.8, and meet the following requirements:(A) Cathodic protection shall meet the applicable requirements of Chapters 57 and 59; and(B) Tanks greater than ten (10) years old without cathodic protection shall be assessed to ensure the tank is structurally sound and free of corrosion holes prior to adding cathodic protection. The assessment shall be by internal inspection or another method approved by the Department, in accordance with § 5500.5, to adequately assess the tank for structural soundness and corrosion holes; and(b) Each UST system shall comply with the spill and overfill prevention equipment requirements of Chapter 59.5507.8 The following codes of practice may be used to comply with requirements of § 5507.7:
(a) NACE International Standard Practice SP 0285, "External Control of Underground Storage Tank Systems by Cathodic Protection";(b) NACE International Standard Practice SP 0169, "Control of External Corrosion on Underground or Submerged Metallic Piping Systems";(c) National Leak Prevention Association Standard 631, Chapter C, "Internal Inspection of Steel Tanks for Retrofit of Cathodic Protection"; or(d) American Society for Testing and Materials Standard G158, "Standard Guide for Three Methods of Assessing Buried Steel Tanks."5507.9 In addition to the walkthrough inspection requirements in § 5904, each owner or operator of an airport hydrant system shall:
(a) Except as provided in paragraph (b) of this subsection, inspect the following areas at least once every thirty (30) days : (1) Hydrant pits (visually check for any damage; remove any liquid or debris; and check for any leaks); and(2) Hydrant piping vaults (check for any hydrant piping leaks);(b) If confined space entry is required under Occupational Safety and Health Administration (OSHA) requirements in 29 CFR part 1910, inspect the areas in paragraph (a) at least annually; and(c) Maintain documentation of the inspections required by this subsection in accordance with the requirements of § 5904.5507.10 Not later than October 13, 2021, each owner or operator of an UST system with a field-constructed tank with a capacity less than or equal to fifty thousand (50,000) gallons shall meet the release detection requirements in Chapter 60.
5507.11 Not later than October 13, 2021, each owner or operator of an UST system with a field-constructed tank with a capacity greater than fifty thousand (50,000) gallons shall meet the requirements in Chapter 60 (except that groundwater or vapor monitoring release detection methods shall be used in combination with inventory control release detection methods) or use one or a combination of the following methods of release detection:
(a) Conduct an annual tank tightness test that can detect a one half gallon per hour (0.5 gal/hr) leak rate;(b) Use an automatic tank gauging system to perform release detection that can detect a leak rate less than or equal to one gallon per hour (1 gal/hr) at least once every thirty (30) days, and perform a tank tightness test that can detect a leak rate of two tenths of a gallon per hour (0.2 gal/hr) at least once every three (3) years;(c) Use an automatic tank gauging system to perform release detection that can detect a leak rate less than or equal to two gallons per hour (2 gal/hr) at least once every thirty (30) days, and perform a tank tightness test that can detect a leak rate of two tenths of a gallon per hour (0.2 gal/hr) at least once every two (2) years;(d) Perform vapor monitoring (conducted in accordance with § 6009 for a tracer compound placed in the tank system) capable of detecting a one tenth of a gallon per hour (0.1 gal/hr) leak rate at least every two (2) years;(e) Perform inventory control (conducted in accordance with Department of Defense Instruction 4140.25, ATA Airport Fuel Facility Operations and Maintenance Guidance Manual, or procedures approved by the Department as equivalent) at least every thirty (30) days that can detect a leak equal to or less than one half percent (0.5%) of flow-through; and (1) Perform a tank tightness test that can detect a one half gallon per hour (0.5 gal/hr) leak rate at least every two (2) years; or(2) Perform vapor monitoring or groundwater monitoring (conducted in accordance with Chapter 60) for the stored regulated substance at least every thirty (30) days; or(f) Another method approved by the Department, if the owner and operator can demonstrate that the method can detect a release as effectively as any of the methods allowed in paragraphs (a) through (c) of this subsection. In comparing methods, the Department shall consider the size of release that the method can detect and the frequency and reliability of detection.5507.12 Not later than October 13, 2021, each owner or operator of underground piping associated with an airport hydrant system or a field-constructed tank with a capacity greater than 50,000 gallons shall meet the requirements in Chapter 60 (except that groundwater or vapor monitoring release detection methods shall be used in combination with inventory control release detection methods) or use one or a combination of the following methods of release detection:
(a) Perform semiannual or annual line tightness test at or above piping operating pressure in accordance with the following: (1) If the test section volume is less than fifty thousand (50,000) gallons, the leak detection rate for a semiannual test shall not exceed one gallon per hour (1 gal/hr) and the leak detection rate for an annual test shall not exceed one half of a gallon per hour (0.5 gal/hr);(2) If the test section volume is equal to or greater than fifty thousand (50,000) gallons and less than seventy- five thousand (75,000) gallons, the leak detection rate for a semiannual test shall not exceed one and one half gallons per hour (1.5 gal/hr) and the leak detection rate for an annual test shall not exceed seventy- five hundredths of a gallon per hour (0.75 gal/hr);(3) If the test section volume is equal to or greater than seventy- five thousand (75,000) gallons and less than one hundred thousand (100,000) gallons, the leak detection rate for a semiannual test shall not exceed two gallons per hour (2 gal/hr) and the leak detection rate for an annual test shall not exceed one gallon per hour (1 gal/hr);(4) If the test section volume is equal to or greater than one hundred thousand (100,000) gallons, the leak detection rate for a semiannual test shall not exceed three gallons per hour (3 gal/hr) and the leak detection rate for an annual test shall not exceed one and one half gallons per hour (1.5 gal/hr); and(5) Piping segment volumes that are equal to or greater than one hundred thousand (100,000) gallons and not capable of meeting the maximum three gallon per hour (3 gal/hr) leak rate for the semiannual test may be tested at a leak rate up to six gallons per hour (6 gal/hr) according to the following schedule: (A) The first test shall be performed not later than October 13, 2021 and may use up to a six gallons per hour (6 gal/hr) leak rate;(B) The second test shall be performed between October 13, 2021 and October 13, 2024 and may use up to a six gallons per hour (6 gal/hr) leak rate;(C) The third test shall be performed between October 13, 2024 and October 13, 2025 and shall use a three gallons per hour (3 gal/hr) leak rate; and(D) Subsequent tests shall be performed annually or semi-annually in accordance with subparagraph (a)(4);(b) Perform vapor monitoring (conducted in accordance with § 6009 for a tracer compound placed in the tank system) capable of detecting a one tenth of a gallon per hour (0.1 gal/hr) leak rate at least every two (2) years;(c) Perform inventory control (conducted in accordance with Department of Defense Instruction 4140.25, ATA Airport Fuel Facility Operations and Maintenance Guidance Manual, or procedures approved by the Department as equivalent) at least every thirty (30) days that can detect a leak equal to or less than one half percent (0.5%) of flow-through; and (1) Perform a line tightness test (conducted in accordance with paragraph (a) of this sub section using the leak rates for the semiannual test) at least every two (2) years; or(2) Perform vapor monitoring or groundwater monitoring (conducted in accordance with Chapter 60) for the stored regulated substance at least every thirty (30) days; or(d) An alternative method approved by the Department, if the owner and operator can demonstrate that the alternative method can detect a release as effectively as one of the methods allowed in paragraphs (a) through (c) of this sub section. In comparing methods, the Department shall consider the size of release that the method can detect and the frequency and reliability of detection.5507.13 When directed by the Department, the owner or operator of an UST system with field -constructed tanks, or an airport hydrant system, that has been permanently closed before February 21, 2020, shall assess the excavation zone and close the UST in accordance with Chapter 61 if releases from the UST system may, in the judgment of the Department, pose a current or potential threat to human health and the environment.
D.C. Mun. Regs. tit. 20, r. 20-5507
Final Rulemaking published at 67 DCR 1778 (2/21/2020)