Whenever hydrocyanic acid or other dangerous gases or fumes are generated or liberated in any room or portion of a structure in the city, a sufficient number of capable, alert watchmen shall remain on duty at the entrance or entrances to the room, building or enclosed space vacated for gassing, to prevent people from entering while gas is present and for two hours after the room or area gassed is opened for airing. All guards or watchmen shall be reliable persons and must be acceptable as a proper guard by the commissioner of buildings. The exterminator shall be held strictly responsible and accountable for the conduct of the guards or watchmen. In every case where the entire building is not vacated, the exterminator or his approved representative shall remain on the job during the progress of fumigation and airing, and shall constantly supervise the occupancy of the structure to insure that no person will be endangered by gas leakage. The exterminator shall give all guards definite and proper instructions, and shall visit the premises being fumigated at regular and frequent intervals during the process to insure that they are properly guarded.
(Added Coun. J. 2-7-96, p. 15616; Amend Coun. J. 6-10-99, p. 23652)