D.C. Mun. Regs. tit. 25-B, § 2202
2202.1 Poisonous or toxic materials shall be used according to:
(a) The Pesticide Operations Act of 1977, effective April 18, 1978 (D.C. Law 2-70; D.C. Official Code § 8-401 et seq.), and this Code;
(b) Manufacturer's use directions included in labeling, and, for a pesticide, manufacturer's label instructions that state use is allowed in a food processing operation; and
(c) The conditions of certification, if certification is required, for use of the pest control materials.
2202.2 Poisonous or toxic materials shall be applied so that:
(a) A hazard to employees or other persons is not constituted;
(b) Contamination including toxic residues due to drip, drain, fog, splash, or spray on food, equipment, utensils, food-contact surfaces, and food-packaging materials is prevented; and
(c) For restricted-use pesticides, contamination is prevented by:
(1) Removing items listed in paragraph (b);
(2) Covering items listed in paragraph (b) with impermeable covers;
(3) Taking other appropriate preventive actions; and
(4) Cleaning and sanitizing equipment, utensils, food-contact surfaces, and food-packaging materials after the application.
SOURCE: Final Rulemaking published at 56 DCR 5245 (July 3, 2009).