F1

Any process for the manufacture, recovery, concentration or distillation of sulphuric acid or oleum.

Any process for the manufacture of any oxide of sulphur but excluding any combustion or incineration process other than the burning of sulphur.

Any process for the manufacture of a chemical which uses, or may result in the release into the air of, any oxide of sulphur but excluding any combustion or incineration process other than the burning of sulphur F2and excluding also any process where such a release could only occur as a result of the storage and use of SO₂ in cylinders.

Any process for the manufacture or recovery of nitric acid.

Any process for the manufacture of any acid-forming oxide of nitrogen.

Any other process (except the combustion or incineration of carbonaceous material as defined in Section 1.1. of this Schedule) F3which is not described in Part B of this Section, does not fall within a description in Section 2.1 or 2.2 of this Schedule and is not treated as so falling by virtue of the rules in Schedule 2, and which is likely to result in the release into the air of any acid-forming oxide of nitrogen.

Any process for the manufacture F4or purification of phosphoric acid.