Schedule – VI

Manufacture and treatment of lead and certain compounds of lead


1.                  Application - This schedule shall apply to all factories or parts of  factories in which any of the following operations are carried on :-


(a)                work  at a furnace where the reduction or treatment of  zinc  or  lead ores is carried on ;


(b)                the  manipulation,  treatment or reduction of  ashes  containing  lead,  the  desilvering of lead or the melting of scrap  lead  or zinc;


(c)                the manufacture of solder or alloys containing more than ten percent of lead;


(d)                the  manufacture  of any oxide, carbonate,  sulphate,  chromate,  acetate, nitrate or silicate of lead;


(e)                the handling or mixing of lead tetra-ethyl;


(f)                  any other operation involving the use of a lead compound; and


(g)                the cleaning of workrooms where any of the operations  aforesaid are carried on.


2.         Definitions - For this purpose of this schedule -


(a)       “lead  compound”  means any compound of lead other  than  galena which, when treated in the manner described below, yields to  an  aqueous  solution  of hydrochloric acid, a quantity  of  soluble  lead compound exceeding, when calculated as lead monoxide,  five   per cent of the “dry weight” of the portion taken for  analysis.  In  the case of paints and similar products and  other  mixtures containing  oil or fat the “dry weight” means the dry weight  of   the  material remaining after the substance has been  thoroughly  mixed  and treated with suitable solvents to remove oil, fats,  varnish or other media.

The method of treatment shall be  as follows :-


A  weighed quantity of the material which has been dried at  100 degree  centigrade  and thoroughly mixed shall  be  continuously  shaken for one hour, at the common temperature with 1,000  times its  weight of an  aqueous  solution  of  hydrochloric acid containing  0.25 per cent by weight of hydrogen chloride.  This solution  shall thereafter be allowed to stand for one hour  and  then  filtered.  The lead salt contained in the clear  filtrate shall  then  precipitated as lead sulphate and weighed  as  lead  sulphate;


(b)       “efficient exhaust draught” means localised ventilation effected  by mechanical  means for the removal of gas,  vapour,  dust  or  fumes  so  as to prevent them (as far as practicable  under  the atmospheric  conditions usually prevailing) from  escaping  into the  air of any place in which work is carried on.   No  draught  shall be deemed efficient which fails to remove smoke  generated at the point where such gas, vapour, fume, or dust originate.



3.         Prohibition relating to women and young persons - No women or  young  person  shall  be  employed  or permitted to  work  in  any  of  the operations specified in paragraph 1.



4.         Requirements to  be observed -  No person shall be employed or  permitted to work in any process involving the use of lead compounds if  the  process is such that dust or fume from a lead  compound  is  produced  therein, or the persons employed therein are liable to  be  splashed  with any lead compound in the course of  their  employment  unless the provisions of paragraphs 5 to 13 are complied with.


5.         Exhaust draught - Where dust, fume, gas or vapour is produced in the  process,  provision shall be made for removing them by means  of  an efficient  exhaust  draught to contrived as to operate on  the  dust, fume, gas or vapour as closely as possible to the point of origin.


6.         Food, drinks, etc. prohibited in workroom - No food, drink, pan and supari or tobacco shall be brought into or consumed by any worker in  any worker in any workroom in which the process is carried on and no  person  shall remain in any such room during intervals for meals  or  rest.


7.         Protective clothing - Suitable protective overalls and head coverage  shall  be  provided, maintained and kept clean by the  occupier  and  such  overalls  and  head coverings shall be  worn  by  the  persons  employed.


8.         Cleanliness  of  workrooms,  tools, etc. - The  rooms  in  which  the  persons are employed and all tools and apparatus used by them shall be kept in a clean state.


9.         Washing facilities -  (1)The occupier shall provide and maintain for the use of  all persons employed suitable washing facilities consisting of -


(a)               a trough with a smooth impervious surface  fitted  with  a waste  pipe, without plug, and of sufficient length to allow of at least 60 centimetres for every five such persons employed  at  any one time, and having a constant supply of water from taps or jets  above  the  trough  at  intervals  of  not  more  than  60 centimetres; or


(b)               at least one wash-basin for every ten persons employed at any one   time,  fitted with a waste pipe and plug and having a constant supply of clean water; together with, in either case, a sufficient supply of nail  brushes,  soap or other suitable cleansing material and clean towels.


(2)       The facilities so provided shall be placed under the charge of a  responsible person and shall be kept clean.


10.       Messroom  or canteen - The occupier shall provide and  maintain for the use of the persons employed suitable and adequate arrangements for taking their meals.  The arrangements shall consist of the use of a room separate from any workroom which shall be furnished  with sufficient  tables  and benches, and unless a canteen serving  hot meals  is  provided, adequate means of warming the food.  The  room shall be  adequately ventilated by the circulation  of  fresh  air,  shall  be placed under the charge of a responsible person and  shall  be kept clean.


11.       Cloakroom -  The occupier shall provide and maintain for the use  of  persons  employed,  suitable  accommodation for  clothing  not  worn during working hours, and for the drying of wet clothing.


12.       Medical facilities and record of examinations and tests - (1) The  occupier of every factory in which grinding or  glazing  of  metals are carried out, shall -


(a)              employ a qualified medical practitioner for medical surveillance of the workers employed therein whose appointment shall be subject to the approval of the Chief Inspector of Factories; and


(b)              provide  to  the  said medical practitioner  all  the  necessary  facilities for the purpose referred to in clause (a).      


(2)       The record of medical examinations and appropriate tests carried out by the said medical practitioner shall be maintained in a separate register approved by the Chief Inspector of  Factories,  which  shall  be kept readily available for  inspection  by  the  Inspector.


13.       Medical examination by the Certifying Surgeon -  (1) Every worker employed shall be examined by a Certifying Surgeon within 15 days of his first employment.  Such examination  shall include  pulmonary  function  tests and  in suspected  cases  chest X-rays. No worker shall be allowed  to  work after 15 days of his first employment in the factory unless certified fit for such employment by the Certifying Surgeon.


(2)               Every worker employed in the said processes shall be re-examined  by a  Certifying  Surgeon at least once in  every 12 calendar months.  Such  re-examination shall, wherever the Certifying  Surgeon  considers  appropriate, include tests as  specified  in  sub-paragraph (1).


(3)               The  Certifying Surgeon after examining a worker, shall issue a Certificate of Fitness in Form 23.  The record  of  examination and  re-examinations  carried  out  shall  be  entered  in  the Certificate and the Certificate shall be kept in the custody  of   the  manager  of the factory.  The record  of  each  examination  carried  out  under sub-paragraphs (1) and  (2),  including  the  nature  and the results of the tests, shall also be  entered  by the Certifying Surgeon in a health register in Form 24.


(4)               The Certificate of Fitness and the health register shall be kept  readily available for inspection by the Inspector.


(5)               If  at any time the Certifying Surgeon is of the opinion that a worker is no longer fit for employment in the said processes on the ground that continuance therein would involve special danger  to the health of the worker he shall make record of his findings in  the said certificate and the health register.  The entry  of  his  findings in those documents should also include the period for which he considers that the said person is unfit for work in the  said processes.  The person so suspended from the  process shall be provided with alternate placement facilities unless  he is fully incapacitated in the opinion of the Certifying  Surgeon,  in  which case the  person  affected  shall  be  suitably rehabilitated.


(6)               No person who has been found unfit to work as said in  sub-paragraph (5) shall be re-employed or permitted to work in the said  processes unless the Certifying Surgeon, after further  examination,  again  certifies him fit for employment  in  those processes.


14.       Exemption -  Where  the  Chief  Inspector  is  satisfied  that  all  or  any  of  the  provisions  of  this any factory from all or any of such provisions,  subject  to  such conditions as he may specify. schedule are  not  necessary  for  the protection of the persons employed, he may by certificate in writing  exempt