D.C. Mun. Regs. tit. 14, § 1112
1112.1 All perishable food or drink shall be kept at or below forty-five degrees Fahrenheit (45° F.), except when being prepared or served.
1112.2 Waste water from refrigeration equipment shall discharge into an open sink or drain properly trapped and sewer connected; provided, that if sewer connections are not available, clean, adequate, and water-tight drip pans shall be provided.
SOURCE: The Housing Regulations of the District of Columbia, 5G DCRR § 4213, Commissioners' Order 55-1503 (August 11, 1955).