Key Lessons from Fatal Workplace Incident at Choa Chu Kang Waterworks

Mr Melvin Yong Yik Chye asked the Acting Minister for Manpower (a) what key lessons have been drawn from the fatal workplace incident at PUB's Choa Chu Kang Waterworks in May 2024; and (b) whether the Ministry will require public sector procuring entities to strengthen governance over workplace safety and health by incorporating lessons learnt into contractor selection, supervision and performance evaluation for higher-risk works.

The incident at Choa Chu Kang Waterworks involved three workers, employed by Stargroup Est. Pte Ltd and its subcontractor, who collapsed after entering an enclosed passage beneath a water treatment tank during cleaning operations. They had been exposed to hydrogen sulphide gas. Two of the workers subsequently passed away. As the case is before the Courts, we are unable to comment on the specific lessons that could be learnt.

The incident underscores that confined space work presents serious risks and must not be treated as routine. There are well-established safety procedures to protect workers entering confined spaces. Employers must conduct proper risk assessments before such work commences, test the atmosphere before entry and provide appropriate respiratory protective equipment where required. Employers should also implement a safe system of work, which includes ensuring that a trained person is stationed outside the confined space at all times to monitor workers inside, maintain communication with them and render assistance in emergencies.

The Ministry of Manpower (MOM) has regular platforms with agencies to share Workplace Safety and Health (WSH) insights, such as lessons learnt from past incidents. MOM may also recommend strengthening agencies' WSH practices, including safety supervision of their contractors, where necessary.