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Control of Industrial Major Accident Hazards (CIMAH) Report Page 27
Ranhill SAJ Sdn. Bhd. Revision 01
Part C: Information Relating to the Safety Management System Date Aug 2019

Any non-routine activities such as repair and service of plant equipment, start-up,
and shutdown of system or equipment, will subject to permit to work or proper risk
assessment including a pre-job briefing by work supervisor.

The Company will conduct safety induction to all employees and contractors on the
safety procedure, prevention, and mitigation measure before starting the work.

The objectives of the induction are:
- Provide details related to rules and regulation when entering the plant’s
premise
- Usage of mandatory and proper PPE
- Provide guidance during emergency

C.2.3.1 Operation Control Procedure – Chlorine

Chlorine Drum Fitting
a) Workers are advised to wear a full chlorine gas face mask with the cartridge
filter before starting the task.
b) Remove the drum cover and reposition the drum where the valve is position
upright. The top valve will release chlorine gas and the bottom valve release
liquid chlorine.
c) Loosen up the nut cover for the top valve and remove it manually.
d) During the loosen up of the nut cover, a gas leak test will be conducted by
using the ammonia solution. Gas leakage can occur when the drum valve is
not securely tightened. Tighten up the spindle valve if leakage is detected.
e) Install a custom connector on the drum. Make sure the coupling is dry and
clean. Use a new gasket each time when making a connection.
f) Tighten up the nut and perform gas leak tests by using the ammonia solution.
g) Close the valve. If no gas leakage is detected, the chlorine drum is ready to
be used.

Chlorination Operation

There are four (4) chlorinators installed in both KT1 & KT2 Chlorination Room
whereby two chlorinators are dedicated for Pre-Chlorination and two chlorinators for
Post Chlorination.

Apart from the built-in automatic control system of the chlorinators and the automatic
drum valve shut off system (Chlorguard), the Chlorination Room control systems
also has the following features:

• Control Features