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5. Dust Control Measures for the Chrysotile Product Manufacturing Sectors
In many situations, particularly those dealing with maintenance, repair and equipment failures, it is not possible to ensure low dust levels at all times in the plant environment. As a result, respirators and special clothing may occasionally be required. This is dicussed in greater detail in Section 6.
5.5 Factory cutting and finishing
These operations can be very dusty. Where possible, these operations should be automated. Whether manual or automated, they must take place in a separate location with special equipment. If high density products are cut by saws, properly designed hoods and exhaust ventilation should be provided. Alternatively, water can be used for dust suppression by directing a stream of water or fog directly onto the saw blade or cutting or drilling tool. Obviously, provisions for collecting and discarding the contaminated water must be available. Cutting and finishing procedures must be carefully monitored, and personal High Efficiency Particulate Air (HEPA) respirators and protective clothing (disposable or washable overalls) must be worn if the dust levels rise above the permissible exposure limit.
The clean-up of dust and debris which can collect around the equipment should be carried out on a frequent basis using wet sweeping, HEPA vacuum cleaners. Clean-up crews must wear approved HEPA respirators when performing vacuuming operations.
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