The following processes if not falling within a description in any other Section of this Schedule—
(a)Any process for the manufacture of fluorine, chlorine, bromine or iodine or of any compound comprising only—
(i)two or more of these halogens; or
(ii)any one or more of those halogens and oxygen ;
(b)Any process of manufacture which involves the use of, or which is likely to result in the release into the air or into the water of, any of those four halogens or any of the compounds mentioned in paragraph (a), other than the use of any of them as a pesticide (as defined in Schedule 6) in water ;
(c)Any process for the manufacture of hydrogen fluoride, hydrogen chloride, hydrogen bromide or hydrogen iodide or any of their acids ;
(d)Any process for the manufacture of chemicals which may result in the release into the air of any of the four compounds mentioned in paragraph (c);
(e)Any process of manufacture (other than the manufacture of chemicals) involving the use of any of the four compounds mentioned in paragraph (c) or any of their acids which may result in the release of any of those compounds into the air, other than the coating, plating or surface treatment of metal.