D.C. Mun. Regs. tit. 20, r. 20-5506
An owner or operator of an UST system may use an industry standard or code of practice developed by a nationally recognized association or independent testing laboratory to comply with a requirement of the UST Regulations if authorized by the UST Regulations or if the industry standard or code of practice is approved by the Department in accordance with § 5506.4.
An owner or operator may request approval of an alternative industry standard or code of practice by submitting a written request to the Department by e-mail to ust.doee@dc.gov or by mail or delivery to the UST Branch, Department of Energy and Environment, 1200 First Street, N.E., 5th Floor, Washington, D.C. 20002.
An owner or operator requesting approval of an alternative industry standard or code of practice shall provide a copy of the industry standard or code of practice to the Department, if requested by the Department.
The Department may approve an alternative industry standard or code of practice only if the owner or operator demonstrates to the Department that the alternative industry standard or code of practice is at least as safe and as protective of health and the environment as the authorized or approved code or standard.
When used in an industry standard or code of practice listed in the UST Regulations or approved under this section, the word "should" shall be construed to mean "shall" for the purpose of compliance with the UST Regulations.
Unless otherwise specified in these regulations, an owner or operator shall use the most current version of the authorized or approved industry standard or code of practice.
D.C. Mun. Regs. tit. 20, r. 20-5506