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Control of Industrial Major Accident Hazards (CIMAH) Report Page 10
Ranhill SAJ Sdn Bhd Revision 01
Part A: Information on the Hazardous Substances Date Aug 2019

Concentration
of Chlorine Descriptions
(ppm)

0.5 • Visual with light indicator shown at the control room

• Ventilation fans automatically switched off
• Visual audible alarm with light indicator
1.0
• Activation of auto closure system to shut the drum valves for
chlorine drums (on-line and standby).

• High Audible Alarm, continuous alarm
3.0
• Ventilation fans automatically switched off
Source: KT1&2 WTP
Table A.2.1.4b: Chlorine Gas Detection and Systems Activation

A.2.2 Sodium Silicofluoride

Sodium Silicofluoride supplied to the Water Treatment Plant was in powder form and
packed in 25kg sack bags. The presence of Sodium Silicofluoride can be detected
easily through physical detection via visual, where the substance is white color.
Breaching of the Sodium Silicofluoride bags will cause the dust emitted into the
environment.