D.C. Mun. Regs. tit. 25-A, § 1509
1509.1 Filters or other grease extracting equipment shall be designed to be readily removable for cleaning and replacement if not designed to be cleaned in place.
1509.2 Commercial cooking systems shall be operated and maintained in good repair according to the D.C. Fire Code (2008) incorporating the International Fire Code (2006) or most recent edition as amended by the D.C. Fire Code Supplement, as amended (Subtitle H of 12 DCMR).P
1509.3 The ventilation system in connection with hoods shall be operated at the required rate of air movement, and classified grease filters shall be in place when equipment under a kitchen grease hood is used in accordance with the D.C. Fire Code (2008) incorporating the International Fire Code (2006) or most recent edition as amended by the D.C. Fire Code Supplement, as amended (Subtitle H of 12 DCMR).P
1509.4 Hoods, grease-removal devices, fans, ducts and other appurtenances shall be cleaned at intervals necessary to prevent the accumulation of grease.
1509.5 The licensee shall maintain on the premises a copy of the establishment's professional service contract and service schedule, which documents the following information:P
(a) Name and address of its District-licensed ventilation hood system cleaning contractor;P
(b) Frequency and extent of ventilation hood system cleaning services provided under the contract;P and
(c) Date and time of ventilation hood system cleaning services were last provided to the establishment.P
1509.6 Grease extractors, where installed, shall be operated when commercial-type cooking equipment is used according to the D.C. Fire Code (2008) incorporating the International Fire Code (2006) or most recent edition as amended by the D.C. Fire Code Supplement, as amended (Subtitle H of 12 DCMR).P
SOURCE: Final Rulemaking published at 50 DCR 4394 (June 6, 2003); as amended by Final Rulemaking published at 59 DCR 13690 (November 30, 2012).