Four workers were injured and transported to the hospital due to a gas leak at the construction site of a wastewater treatment plant.
According to the fire authorities, around 11:24 a.m. on the 3rd, gas leaked during a microbial air injection test on the first floor underground of the wastewater treatment plant modernization project site in Daedoo-dong, Jeju City.
Firefighters suspect that hydrogen sulfide leaked due to the smell of rotten eggs at the accident site.
Firefighters are currently investigating the specifics of the accident.
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