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Contents (2017 - 404)
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Work Health and Safety Regulation 2017
Current version for 15 November 2019 to date (accessed 8 December 2019 at 06:30)
Schedule 15
Schedule 15 Hazardous chemicals at major hazard facilities (and their threshold quantity)
(Chapter 9)
1   Definitions
In this Schedule—
Class has the same meaning as in the ADG Code.
Division has the same meaning as in the ADG Code.
Packing Group has the same meaning as in the ADG Code.
subsidiary risk has the same meaning as in the ADG Code.
2   Relevant hazardous chemicals
The hazardous chemicals that characterise a workplace as a facility for the purposes of this Regulation are the chemicals specifically referred to in Table 15.1 and chemicals that belong to the types, classes and categories referred to in Table 15.2.
3   Threshold quantity of one hazardous chemical
(1)  In relation to each hazardous chemical referred to in clause 2, Column 3 of Tables 15.1 and 15.2 provides a quantity that is described as the “threshold quantity” of that chemical.
(2)  If a hazardous chemical is referred to in Table 15.1, the threshold quantity of the chemical is that described in Table 15.1, whether or not the chemical also belongs to a type, class or category referred to in Table 15.2.
(3)  If a hazardous chemical is not referred to in Table 15.1, and the chemical belongs to a type, class or category referred to in Table 15.2, the threshold quantity of that chemical is that of the type, class or category to which it belongs.
(4)  If a hazardous chemical is not referred to in Table 15.1, and the chemical appears to belong to more than 1 of the types, classes or categories referred to in Table 15.2, the threshold quantity of that chemical is that of the relevant type, class or category which has the lower or lowest threshold quantity.
4   Threshold quantity of more than 1 hazardous chemical
If there is more than 1 hazardous chemical, a threshold quantity of chemicals exists where, if a number of chemicals are present, the result of the following aggregation formula exceeds 1—
 

Where—
(a)  x, y, [....] and n are the hazardous chemicals present or likely to be present,
(b)  qx, qy, [....] and qn is the total quantity of hazardous chemicals x, y, [....] and n present or likely to be present, other than—
(i)  a hazardous chemical that is present or likely to be present in an isolated quantity less than 2% of its threshold quantity,
(ii)  hazardous chemicals that are solely the subject of intermediate temporary storage, while in transit by road or rail (unless it is reasonably foreseeable that, despite the transitory nature of the storage, hazardous chemicals are or are likely to be present frequently or in significant quantities),
(c)  Qx, Qy, [....] and Qn is the individual threshold quantity for each hazardous chemical x, y, [....] and n,
(d)  a hazardous chemical is present or likely to be present in an isolated quantity, for the purposes of paragraph (b)(i), if its location at the facility is such that it cannot, on its own, act as an initiator of a major incident.
5   How Table 15.1 must be used
(1)  The UN number listed in Table 15.1 against the named hazardous chemical does not restrict the meaning of the name, which also applies to hazardous chemicals that fall outside the UN number.
Examples.
 
1   
The hazardous chemicals are too dangerous to be transported.
2   
The hazardous chemicals are part of mixtures covered by a different UN number.
(2)  Any hazardous chemicals that are covered by the listed UN numbers must be included in the quantity of the chemical named.
6   How Table 15.2 must be used
(1)  The quantities specified for explosives in Table 15.2 relate to the weight of explosive exclusive of packagings, casings and other non-explosive components.
(2)  If explosives of different hazard divisions are present in the same area or storage, all of the explosives must, before Table 15.2 is applied, be classified in accordance with the following table—
Div.
1.1
1.2
1.3
1.4
1.5
1.6
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1.2
1.1
1.2
1.1
1.2
1.1
1.2
1.3
1.1
1.1
1.3
1.3
1.1
1.3
1.4
1.1
1.2
1.3
1.4
1.5
1.6
1.5
1.1
1.1
1.1
1.5
1.5
1.5
1.6
1.1
1.2
1.3
1.6
1.5
1.6
Table 15.1
 
Column 1
Column 2
Column 3
Item
Hazardous chemical
UN Nos included under name
Threshold quantity (tonnes)
1
ACETONE CYANOHYDRIN
1541
20
2
ACETYLENE
1001
50
3
ACROLEIN
1092
200
4
ACRYLONITRILE
1093
200
5
ALLYL ALCOHOL
1098
20
6
ALLYLAMINE
2334
200
7
AMMONIA, ANHYDROUS, LIQUEFIED or AMMONIA SOLUTIONS, relative density less than 0.880 at 15 degrees C in water, with more than 50% ammonia
1005
200
8
AMMONIUM NITRATE FERTILISERS
2067
2068
2069
2070
5000
9
AMMONIUM NITRATE, with not more than 0.2% combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substance
1942
2500
10
ARSENIC PENTOXIDE, Arsenic (V) Acid and other salts
1559
10
11
ARSENIC TRIOXIDE, Arsenious (III) Acid and other salts
1561
0.1
12
ARSINE
2188
1.0
13
BROMINE or BROMINE SOLUTIONS
1744
100
14
CARBON DISULFIDE
1131
200
15
CHLORINE
1017
25
16
DIOXINS
0.1
17
ETHYL NITRATE
50
18
ETHYLENE DIBROMIDE
1605
50
19
ETHYLENE OXIDE
1040
50
20
ETHYLENEIMINE
1185
50
21
FLUORINE
1045
25
22
FORMALDEHYDE (greater than 90%)
50
23
HYDROFLUORIC ACID SOLUTION (greater than 50%)
1790
50
24
HYDROGEN
1049
50
25
HYDROGEN CHLORIDE
  
 
—Anhydrous
1050
250
 
—Refrigerated Liquid
2186
250
26
HYDROGEN CYANIDE
1051
1614
20
27
HYDROGEN FLUORIDE
1052
50
28
HYDROGEN SULFIDE
1053
50
29
LP GASES
1011
1012
1075
1077
1978
200
30
METHANE or NATURAL GAS
1971
1972
200
31
METHYL BROMIDE
1062
200
32
METHYL ISOCYANATE
2480
0.15
33
OXIDES OF NITROGEN, including nitrous oxide, nitrogen dioxide and nitrogen trioxide
1067
1070
1660
1975
2201
2421
50
34
OXYGEN
1072
1073
2000
35
PHOSGENE
1076
0.75
36
PROPYLENE OXIDE
1280
50
37
PROPYLENEIMINE
1921
200
38
SODIUM CHLORATE, solid
1495
200
39
SULFUR DICHLORIDE
1828
1
40
SULFUR DIOXIDE, LIQUEFIED
1079
200
41
SULFURIC ANHYDRIDE (Alt. SULFUR TRIOXIDE)
1829
75
42
TITANIUM TETRACHLORIDE
1838
500
43
TOLUENE DIISOCYANATE
2078
200
Table 15.2
 
Column 1
Column 2
Column 3
Item
Hazardous chemical
Description
Threshold quantity (tonnes)
1
Explosive materials
Explosive of Division 1.1A
10
All other explosives of Division 1.1
50
Explosive of Division 1.2
200
Explosive of Division 1.3
200
2
Compressed and liquefied gases
Compressed or liquefied gases of Division 2.1 or Subsidiary Risk 2.1
200
Liquefied gases of Subsidiary Risk 5
200
Compressed or liquefied gases that meet the criteria for Very Toxic in Table 15.3
20
Compressed or liquefied gases that meet the criteria for Toxic in Table 15.3
200
3
Flammable materials
Liquids that meet the criteria for Class 3 Packing Group I Materials (except for crude oil in remote locations)
200
Crude oil in remote locations that meets the criteria for Class 3 Packing Group I
2,000
Liquids that meet the criteria for Class 3 Packing Group II or III
50,000
Liquids with flash points <61°C kept above their boiling points at ambient conditions
200
Materials that meet the criteria for Division 4.1 Packing Group I
200
Spontaneously combustible materials that meet the criteria for Division 4.2 Packing Group I or II
200
Materials that liberate flammable gases or react violently on contact with water which meet the criteria for Division 4.3 Packing Group I or II
200
Materials that belong to Classes 3 or 8 Packing Group I or II which have Hazchem codes of 4WE (materials that react violently with water)
500
4
Oxidising materials
Oxidising material listed in Appendix A to the ADG Code
50
Oxidising materials that meet the criteria for Division 5.1 Packing Group I or II
200
5
Peroxides
Peroxides that are listed in Appendix A to the ADG Code
50
Organic Peroxides that meet the criteria for Division 5.2
200
6
Toxic solids and liquids
Materials that meet the criteria for Very Toxic in Table 15.3 except materials that are classified as Infectious Substances (Division 6.2) or as Radioactive (Class 7)
20
Materials that meet the criteria for Toxic in Table 15.3
200
Table 15.3 Criteria for toxicity
Description
Oral Toxicity1 LD50 (mg/kg)
Dermal Toxicity2 LD50 (mg/kg)
Inhalation Toxicity3 LC50 (mg/L)
Very Toxic
LD50 ≤ 5
LD50 ≤ 40
LC50 ≤ 0.5
Toxic
5 < LD50 ≤ 50
40 < LD50 ≤ 200
0.5 < LC50 ≤ 2
Key
 
1   
In rats
2   
In rats or rabbits
3   
4 hours in rats