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Why wasn’t guidance on using full face respirators at hazardous PSI levels included in the earlier version of the guidelines?

The current measures such as minimising or avoiding prolonged or strenuous outdoor work, adopting risk mitigating measures like using mechanical aids, adjusting work assignments or rotating jobs to shorten time spent in outdoor work, scheduling sufficient indoor rest breaks and the use of N95 masks when working outdoors at certain PSI levels, would cover for haze situations that we have encountered so far. In the event that the 24-hour PSI levels exceed 400, we expect that almost all outdoor work would have ceased except for essential work.

While the existing measures include the use of the N95 mask provide protection to the workers concerned, the use of full face respirators (which have a higher protection factor) will provide a greater level of protection, particularly for prolonged work at such PSI levels, thus enabling essential work to continue safely. MOM has consulted with the relevant industry stakeholders on the need, usage and impact of using such respirators for outdoor work at such PSI levels. The industry understands the need and supports this.

Last Updated: 15 September 2015