Workplace Safety and Health (General Provisions) Regulations

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3 Infectious agents and biohazardous material

7 Drainage of floors

8 Sanitary conveniences

9 Reduction of vibration

10 Protection against excessive heat or cold and harmful radiations

12 Electric generator, motor, transmission machinery, etc.

13 Removal of fencing from machinery

14 Electrical installation and equipment

15 Construction and maintenance of fencing or other safeguards

16 Lock-out procedures

17 Protective measures relating to tanks, structures, sumps or pits containing dangerous substances

18 Self-acting machines

21 Lifting appliances and lifting machines

22 Register of lifting gears, etc.

23 Measures to be taken to prevent falls

26 Precautions with regard to explosive or flammable dust, gas, vapour or substance

27 Conditions before steam boiler, steam receiver, air receiver or refrigerating plant pressure receiver may be used

31A Extension of time for examination of steam boilers, steam receivers and air receivers

32 Periodical examinations when authorised examiner is not available

33 Pressure vessel containing hazardous substance

34 Pipes and equipment conveying certain substances

36 Repair of pressure vessel

36A Definitions for purposes of regulation 36B

36B Video surveillance system

37 Prevention of fire

38 Safety provisions in case of fire

38A Definitions for purposes of regulation 38B

38B Executive workplace safety and health course

39 Toxic dust, fumes or other contaminants

40 Permissible exposure levels of toxic substances

41 Hazardous substances

43 Safety data sheet

44 Exclusion from regulations 41, 42 and 43

44AA Notifications relating to Fourth Schedule dust

44A Lorries carrying persons on deck

44B Dual role drivers driving lorries carrying persons on deck

Please check the legislation timeline to ensure that you are viewing the correct legislation version. See also FAQ B3.

Versions

find current version as at

01 Jan 2025

Amended by
S 930/2024

Amended by
S 471/2024

Amended by
S 434/2024

Amended by
S 119/2024

Amended by
S 989/2022

Amended by
S 277/2014

Amended by
S 517/2011

Amended by
S 609/2009

Amended by
S 463/2009

FOURTH SCHEDULE

Regulation 2

Threshold quantity of combustible dust

Part 1

ORGANIC SUBSTANCES

First column

Substance

Second column

Threshold quantity of combustible dust derived from substance

Alfalfa

100 kilograms

Apple

Beetroot

4.	Carbon black

5.	Carrageenan

Carrot

7.	Cereals (for example, barley, corn, oat, rice, rye and wheat) and their derivatives

Charcoal

Coal

10.

Cocoa

11.	Coconut and its derivatives

12.

Coffee

13.

Coke

14.	Cotton and its derivatives

15.

Egg white

16.

Garlic

17.	Grains (malted)

18.	Grains (spent)

19.

Grass

20.

Hops

21.	Lemon peel or pulp

22.

Linseed

23.	Locust bean gum

24.	Milk and its derivatives

25.	Olive pellet

26.

Onion

27.

Parsley

28.

Peach

29.

Peanut

30.

Peat

31.	Potato and its derivatives

32.

Soot

33.	Soybean and its derivatives

34.

Spice

35.

Sugar

36.	Sunflower seeds

37.

Tapioca

38.

Tea

39.

Tobacco

40.

Walnut

41.	Xanthan gum

42.	Yucca seeds

43.

Cellulose

25 kilograms

44.

Cork

45.

Wood

Part 2

PLASTIC SUBSTANCES

First column

Substance

Second column

Threshold quantity of combustible dust derived from substance

1.	Epoxy resin

100 kilograms

2.	Ethylene-vinyl acetate copolymer

Melamine

4.	Polyacrylamide

5.	Polyacrylonitrile

6.	Polyethylene

7.	Polypropylene

8.	Polyvinyl acetate

9.	Polyvinyl alcohol

10.	Polyvinyl butyral

11.	Polyvinyl chloride

12.	Terpene-phenol resin

13.	Urea-formaldehyde-cellulose

14.	Phenolic resin

25 kilograms

15.	Polymethyl acrylate

Part 3

CHEMICAL SUBSTANCES

First column

Substance

Second column

Threshold quantity of combustible dust derived from substance

1.	Adipic acid

100 kilograms

2.	Ascorbic acid

3.	Calcium acetate

4.	Calcium stearate

5.	Carboxy methyl cellulose

Dextrin

Lactose

8.	Lead stearate

9.	Methyl-cellulose

10.	Paraformaldehyde

11.	Sodium ascorbate

12.	Sodium stearate

13.

Sulphur

14.	Anthraquinone

Any quantity

Part 4

METAL SUBSTANCES

First column

Substance

Second column

Threshold quantity of combustible dust derived from substance

Bronze

100 kilograms

Copper

Iron

4.	Iron carbonyl

Manganese

Silicon

Tantalum

Titanium

Zinc

10.

Aluminium

Any quantity

11.

Magnesium

12.

Niobium

[S 930/2024 wef 01/01/2025]

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