Section 5A in The West Bengal Factories Rules, 1958
5A. [ Use of hydrofluoric acid. [Inserted by the West Bengal Factories (Amendment) Rules, 1991.] -
The following provisions shall apply to rooms in which glass is treated with hydrofluoric acid;(a)there shall be inlets of adequate size so as to secure and maintain efficient ventilation in all parts of the room;(b)the floor shall be covered with guittaparcha which shall be kept light and shall slope gently down to a covered drain;(c)The work places shall be so enclosed in projecting hoods that openings, required for bringing in the objects to be treated shall be as small as practicable; and(d)The efficient exhaust draught shall be so contributed that the gas is exhausted downwards]
