D.C. Mun. Regs. tit. 11, r. 11-K919
Loading shall be provided in accordance with the requirements of Subtitle C, Chapter 9 and the provisions of this section.
Access to loading and service/delivery space shall not be required to meet the requirement of Subtitle C § 904.5, which requires access be from an open or approved alley, where one exists.
All access to loading facilities, whether from a public or private right of way, shall meet DDOT and Public Space Committee standards.
In addition to the loading screening and lighting requirements of Subtitle C § 908, any loading berths or service/delivery spaces that are not enclosed within a building, if potentially visible from a public right-of-way, shall have, in addition to the wall required by this subsection, a screen of evergreen trees, planted at a distance of no more than fifteen feet (15 ft.) on center, of a species that at maturity would have a typical height of at least fifteen feet (15 ft.).
D.C. Mun. Regs. tit. 11, r. 11-K919