Section 38 in The West Bengal Factories Rules, 1958
38. Septic Tank Latrines.
- The following provisions shall apply to septic tank latrines :(1)The maximum number of daily users for whom the tank is designed shall be approved by the [Public Health Engineering Directorate] [Substituted by Notification No. 340 L.W. /L.W./IR-4185 dated 2nd April 1986], West Bengal, and a notice board showing such number shall be fixed in a prominent position on each latrine.Septic tanks constructed after commencement of this rule shall be so designed as to allow a space of [57 to 85 cubic centimeter] [Substituted by ibid.] per user. The ordinary filter beds shall have [170 cubic centimeter] [Substituted by ibid.] of filtering media per every user and for rotary filters the capacity may reduced to 0.085 centimeter per user.(2)An efficient automatic recording turnstile or turnstiles shall be provided for recording the total number of users admitted on any day, and a register showing the number of daily users shall be maintained.(3)The effluent or the reform shall conform to such standards as the State Government may prescribe by notification in the Official Gazette. The septic tanks and filter beds shall be dislodged at least once a year.(4)For the satisfactory disposal of the sludge or other solid matters, a pit of cubical capacity equal to the total flow of not less than an hour shall be provided to receive the solid matter. When the pit becomes full, the valves shall be closed and solid matter and sludge shall be allowed time to settle. The effluent shall then be drawn off and sterilized, and the solid matter and sludge shall be trenched or burnt:Provided that where the Inspector is satisfied that in respect of any septic tank, the requirements of clause (2) are not necessary, he may, by order in writing, grant exemption from that clause on such conditions, if any, as he may impose.
