MoD Health & Safety Handbook 

JSP 375 Vol 2 

LEAFLET 5 ANNEX G 

MANAGEMENT OF HAZARDOUS SUBSTANCES INC. LEAD & ASBESTOS 

CONTENTS 

Para 

CONTROL OF HAZARDOUS SUBSTANCES 

 1  Introduction 

  3 

Prevention of exposure 

  8 

Level of control of exposure 

  10 

Maximum exposure limits (MEL) 

  11 

Occupational exposure standards (OES) 

 12 

`Sk' notation 

 13 

`Sen' notation 

  15 

Methods of controlling exposure 

 16 

Process related methods 

 17 

Personnel related methods 

  18 

Personal protective equipment (PPE) 

 19 

Routine exposure monitoring 

 20 

Health surveillance 

  21 

Ensuring that controls continue to be effective 

  30 

Use of control measures 

Fig 

Page 

1  Flow Diagram for Controlling Exposure 

6 

2  Flow Diagram for Controlling Exposure (Cont from Fig 1) 

7 

3  Flow Diagram for Controlling Exposure (Cont from Fig 2) 

8 

CONTROL OF HAZARDOUS SUBSTANCES 

INTRODUCTION 

1 

This leaflet is designed to give assessors and line management general information and advice on 

the types of control measures, which should be considered when personnel are likely to be exposed to 

substances hazardous to health. When choosing measures for controlling exposure, you should start at 

the beginning and work through the leaflet as far as required.  The most effective methods are those at 

the beginning   least effective is personal protective equipment. 

2 

If you are involved in the planning of new processes or for the removal of processes to another site 

or building, you should re consider the current control measures and arrange for specialist advice at the 

planning stage (it is easier to alter plans than plant or buildings). 

PREVENTION OF EXPOSURE 

3 

Prevention of exposure is the most effective control measure and should be the prime objective, 

particularly if using carcinogens, in view of the serious and often irreversible nature of the disease.  If it 

is not reasonably practicable to prevent exposure to a carcinogen or to a biological agent by using an 

alternative substance or process, then specific control measures as listed in Regulation 7(5) or 7(6) 

respectively must be taken.  

4 

Prevention of exposure may be achieved by: 

4.1 

Changing the method of work, so that the operation giving rise to the exposure is no longer 

necessary. 

Leaflet 5 Annex G 

April 2003 

 Page 

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