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.
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.
(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.
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--
(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.
(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
|Column 1||Column 2||Column 3|
|Item||Hazardous chemical||UN Nos included under name||Threshold quantity (tonnes)|
|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 |
|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|
|13||BROMINE or BROMINE SOLUTIONS||1744||100|
|22||FORMALDEHYDE (greater than 90%)||--||50|
|23||HYDROFLUORIC ACID SOLUTION (greater than 50%)||1790||50|
|26||HYDROGEN CYANIDE||1051 |
|29||LP GASES||1011 |
|30||METHANE or NATURAL GAS||1971 |
|33||OXIDES OF NITROGEN, including nitrous oxide, nitrogen dioxide and nitrogen trioxide||1067 |
|38||SODIUM CHLORATE, solid||1495||200|
|40||SULFUR DIOXIDE, LIQUEFIED||1079||200|
|41||SULFURIC ANHYDRIDE (Alt. SULFUR TRIOXIDE)||1829||75|
|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|
|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 rats2 In rats or rabbits3 4 hours in rats