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Control of Industrial Major Accident Hazards (CIMAH) Report Page 5
Ranhill SAJ Sdn Bhd Revision 01
Executive Summary Date Aug 2019

The Company has established the Occupational Safety and Health
Management System and is committed to comply with the applicable legal
and other requirements through continuous improvement to ensure a safe
and healthy working environment and plant.

3.2.4 Part D: Information on Potential Major Accidents

The potential major accidents could be due to the loss of containment of
Chlorine from the storage cylinder or drum, tubing and piping system. The
hazard involved is from the dispersion of toxic Chlorine gas to the
surrounding atmosphere outside the Chlorine Room.

From the quantitative risk analysis conducted and presented in this report,
the individual risk contour is within the KT1 & KT2 WTP, and will not
significantly impact upon any nearby industrial and residential area.

Therefore, it is concluded that KT1 & KT2 WTP’s current operation
satisfies the risk criterion as proposed in the Department of Environment’s
(DOE) guidelines. This is considered as acceptance risk criteria, with the
emphasis to ensure the offsite emergency response team and set up are
well established to minimise the risk in the event of recovery measures are
needed.

3.2.5 Conclusion

KT1 & KT2 WTP stores and uses Chlorine as a disinfectant in the water
treatment processes. Chlorine liquid is contained in the cylinders and
drums stored at the Chlorine Room.

KT1 & KT2 WTP is fully aware of the hazard and risk in the event of toxic
gas dispersion. Measures are taken to ensure the design and installation of
the Chlorine Room and the associated equipment meet the necessary
design standards. KT1 & KT2 WTP team has implemented appropriate
measures to minimise and control any possibility of Chlorine incidents such
as toxic gas dispersion.