SCHEDULE 3FREQUENCY OF THOROUGH EXAMINATION AND TEST OF LOCAL EXHAUST VENTILATION PLANT USED IN CERTAIN PROCESSES
Column 1 | Column 2 |
|---|---|
Process | Minimum frequency |
Processes in which blasting is carried out in or incidental to the cleaning of metal castings, in connection with their manufacture. | 1 month |
Processes, other than wet processes, in which metal articles (other than of gold, platinum or iridium) are ground, abraded or polished using mechanical power, in any room for more than 12 hours in any week. | 6 months |
Processes giving off dust or fume in which non-ferrous metal castings are produced. | 6 months |
Jute cloth manufacture. | 1 month |