As an MHI, you are required to provide and share information with other workplaces within the affected area.
In accordance with the WSH (MHI) Regulations, you are required to share information with workplaces in the affected area. This is because these workplaces could be impacted by major accidents that occur at your MHI.
Sharing information enables affected workplaces to plan accordingly for their major accident prevention policy and emergency response.
Who to share with
After assessing your safety case, MHD will inform you the workplaces in the affected area that you are required to share information with.
Affected workplaces can be:
- Designated groups of MHI
- Non-MHI workplaces
What to share
As an MHI, you must share the information listed in the Fifth Schedule of WSH (MHI) Regulations with the affected workplaces.
The information must:
- Be suitable, updated and relevant.
- Focus on the consequences due to the inherent nature and presence of dangerous substances onsite. Causes of the potential major accidents are not required.
- Help affected parties to:
- Identify hazards.
- Understand potential hazards and nature of major accidents.
- Estimate consquences of major accidents.
- Take measures to mitigate risks, where reasonably practicable.
- Assess suitability of existing evacuation routes or mustering points.
- Assess impact on infrastructure, equipment and buildings.
These are the key information to be shared with affected workplaces:
- Nature of major accident hazards
- How affected workplaces will be alerted
- Recommended actions for affected workplaces
- Choose scenarios that may impact these workplaces, including:
- Worst case scenarios
- Selected major accident scenarios
- Safety critical events with good geographical spread
- Share the harm footprints from your latest approved Quantitative Risk Assessment (QRA), including the distances of the footprints and a map showing the affected areas.
- Scope and share information relevant to affected workplaces:
- For fire or explosion scenarios: 20kW/m2, 4kW/m2, 2psi,1psi and Lower Flammability Limit (LFL) harm footprints.
- For toxic scenarios: Nature and effects of toxic hazards.
You need to share harm footprints with affected workplaces only if the harm footprints encroach into their premises. Other MHIs or workplaces don’t need to receive the same information if it is not applicable to them.
You can remove sensitive information before sharing with affected workplaces.
However, the information shared needs to be sufficiently complete for affected workplaces to make informed decisions on preventive measures.
You must inform affected workplaces on how they will be alerted if there is a major accident at your MHI.
You need to:
- Examine your resources and work with MHIs within the designated group on the best way to alert the affected workplaces.
- Work with relevant authorities, such as JTC and SCDF, to faciliate communications to alert the affected workplaces.
You must provide affected workplaces with recommended actions to take if a major accident occurs at your MHI.
This information can be extracted from your safety data sheets, or known and established sources of literature.
When to review
You must review and, where necessary, revise the information provided to affected workplaces if there’re any changes in critical information. For example, a change in contact person, new harm footprints, etc.
The information should be shared every five years or when it is revised.
This ensures that affected workplaces are updated when there are any changes.
How to share
You need to meet with other MHIs in your designated group to exchange information. You need to document the information shared and received.
When sharing information with non-MHIs, you could use one-way communication media, such as pamphlets, letters, etc.
However, you should still be prepared to receive and answer queries raised by non-MHIs. This will allow non-MHIs to better understand major accident hazards and risks.
What should affected workplaces do
It is the duty of affected workplaces to ensure the safety and health of the persons within their premises.
To do so, they need to consider information shared by MHIs in their risk management and emergency response.
Affected workplaces must:
- Use the information to revalidate their risk control measures.
- Document external domino risks to their sites in their emergency response plan and in the safety case.
- Understand that the information shared is intended to facilitate risk management and emergency response planning for possible domino effects.
- The likelihood and consequences of major accidents would have been significantly lowered after the implementation of risk reduction measures by MHIs through the ALARP principle.