D.C. Mun. Regs. tit. 25-B, § 1617
1617.1 Refuse, recyclables, and returnables shall be removed from the premises at a frequency that will minimize the development of objectionable odors and other conditions that attract or harbor insects and rodents and that protects against contamination of food, utensils, equipment, food-contact surfaces, food packaging materials, water supplies, and ground surfaces.
1617.2 The licensee shall maintain a copy of the facility's professional service contract which documents the following information:
(a) Name and address of its licensed trash or solid waste contractor;
(b) Duration of the contract; and
(c) Frequency of trash or solid waste collection services provided under the contract.
1617.3 Trash or solid waste collection shall comply with title 21, chapter 7 of the DCMR.
SOURCE: Final Rulemaking published at 56 DCR 5245 (July 3, 2009).