Before fumigating with hydrocyanic acid gas or other dangerous gases or fumes, the operator shall securely seal all cracks, holes, crevices, openings and apertures in walls, ceilings and floors in such a way as to confine the gas to the premises intended to be fumigated.
(Added Coun. J. 2-7-96, p. 15616; Amend Coun. J. 6-10-99, p. 23652)