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

2.2 Application

The CIMAH requirements are only applicable to industrial activities that are classified in
the Regulation as MHI. Installations, which are mentioned in Part 1, under item 3 of the
Regulations, are not required to conform to the requirements of the Regulations. The
industries exempted from the regulations are as follows:

a. A nuclear installation;
b. An installation under the armed forces;
c. A vehicle or vessel transporting hazardous substance to or from the site of an
industrial activity; and
d. An industrial activity in which it is involved or likely to be involved a quantity of
hazardous substance or a category or categories of substances which is equal or
less than 10 % of the threshold quantity of the hazardous substances.

An installation that involved in the handling, storage and usage of hazardous
substances is categorized as MHI if the amount of hazardous substances on-site
exceeded the threshold quantity, therefore requires complying with the CIMAH
Regulations 1996 by submitting the Safety Report and Emergency Response Plan
(ERP) to DOSH. However, for installation which involved in handling a quantity of
hazardous substance that is more than 10% of the threshold quantity but less than the
threshold quantity of the hazardous substance is categorized as non-MHI.

Under the regulations, every manufacturer is required to notify to DOSH of the
installation
operations activities within his control by completing the Notification of Industrial Activity
Form and submitting it to DOSH. Upon receiving the Notification form, DOSH will then
determine the status of the installation i.e.-Major Hazard Installation (MHI) or non-Major
Hazard Installation (non-MHl).

In this industrial activity report, Chlorine is being used as an disinfectant in the water
treatment process and the amount of Chlorine on-site has exceeded the threshold
quantity limit of 10 tonnes. Thus, the installation is classified as MHI requiring the full
compliance to CIMAH Regulations 1996. Under the requirements of the Regulations,
this report or an updated version (if necessary) is to be submitted every subsequent 3
years or 3 months before the start of operation of any modification or expansion for the
plant.