The Haze: 30-sec honk signals construction workers to stop work

The Haze: 30-sec honk signals construction workers to stop work

SINGAPORE - Freeze - that is what 500 construction workers at the Punggol Waterway Terrace 1 worksite will do when they hear a 30sec honk from the tower cranes.

For that is the signal to stop work.

It also means the 24-hour Pollutant Standards Index (PSI) reading had climbed to the 400 mark. "That happened only once last Friday, when the PSI level was at 400. We stopped work for about two hours," director of Tiong Seng Contractors Derick Pay, 45, told reporters on Monday.

It was part of the precautions the company has in place to make sure its workers are not badly affected should the haze become bad.

Mr Pay said the company had distributed N95 masks to every worker on all its worksites in Singapore.

"When the PSI reading reaches 200, all the workers must wear their masks. At 300, those carrying out hazardous activities must stop work," he said.

When asked, he said hazardous work include those "at high altitudes, lifting heavy objects and those needing clear visibility".

And to ensure everyone complies, the horn on the tower cranes will sound.

"Twice at 200, when everyone has to wear their masks; and three times at 300," he said.

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