D.C. Mun. Regs. tit. 25-B, § 1504
1504.1 Removal of liquid waste, including grease collections, shall comply with the provisions of this chapter. The licensee shall maintain a copy of the food processing operation's waste service contract on the premises of the food processing operation indicating approved waste servicing areas, and the:
(a) Name and address of the licensed sewage and liquid waste transport contractor;
(b) Duration of the contract; and
(c) Frequency of sewage and liquid waste removal services provided under the contract.
1504.2 Sewage and other liquid wastes shall be removed from a food processing operation by a sewage transport vehicle in such a way that the waste does not constitute a source of contamination in areas where food is exposed, and in such a way that a public health hazard or nuisance is not created.
SOURCE: Final Rulemaking published at 56 DCR 5245 (July 3, 2009).