Curing or chemically treating as part of a manufacturing process timber or products made wholly or mainly of wood if any substance listed in column 1 of the Table in paragraph 13 of Part 2 of this Schedule is used.
Manufacturing products wholly or mainly of wood at any works if the activity involves the sawing, drilling, shaping, turning, planing, shredding, curing or chemical treatment of wood and the throughput of the works in any 12 month period is likely to exceed–
(i)10,000 cubic metres, in the case of works at which wood is sawed but at which wood is not subjected to any other relevant activities or is subjected only to relevant activities which are exempt activities ; or
(ii)1,000 cubic metres in any other case.
In this Part–
“relevant activities”, other than sawing, are “exempt activities” where, if no sawing were carried on at the works,the activities carried on there would be unlikely to result in the release into the air of any substances listed in paragraph 12 of Part 2 of this Schedule in a quantity which is capable of causing significant harm;
“throughput” shall be calculated by reference to the amount of wood which is subjected to any of the relevant activities: but where, at the same works, wood is subject to two or more relevant activities, no account shall be taken of the taken of the second or any subsequent activity;
“wood” includes any product consisting wholly or mainly of wood;
“works” includes a sawmill or any other premises on which relevant activities are carried out on wood.