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 these regulations 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:

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	5 000
		2068
		2069
		2070
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	2 500
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	20
		1614
27.	HYDROGEN FLUORIDE	1052	50
28.	HYDROGEN SULFIDE	1053	50
29.	LP GASES	1011	200
		1012
		1075
		1077
		1978
30.	METHANE or NATURAL GAS	1971	200
		1972
31.	METHYL BROMIDE	1062	200
32.	METHYL ISOCYANATE	2480	0.15
33.	OXIDES OF NITROGEN, including nitrous oxide, nitrogen dioxide and nitrogen trioxide	1067	50
		1070
		1660
		1975
		2201
		2421
34.	OXYGEN	1072	2 000
		1073
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 meet 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 o 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
	left " valign="">	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

	Column 1	Column 2	Column 3
Description	Oral Toxicity 1 LD 50 (mg/kg)	Dermal Toxicity 2 LD 50 (mg/kg)	Inhalation Toxicity 3 LC 50 (mg/L)
Very Toxic	LD 50 ≤ 5	LD 50 ≤ 40	LC 50 ≤ 0.5
Toxic	5 < LD 50 ≤ 50	40 < LD 50 ≤ 200	0·5 < LC 50 ≤ 2
Key
1	In rats
2	In rats or rabbits
3	4 hours in rats