1. In Part B and in this paragraph—E+W
“excluded activity” means any relevant activity (other than sawing) which, ignoring any sawing carried on at the works, would be unlikely to result in the release into the air of any substance in paragraph 6(3) of Part 1 of this Schedule in a quantity capable of causing significant harm;
“relevant activity” means the sawing, drilling, sanding, shaping, turning, planing, curing or chemical treatment of wood;
“throughput” means the amount of wood which is subjected to a relevant activity, but where wood is subject to two or more relevant activities at the same works, the second and any subsequent activity is to be ignored;
“wood” includes any product consisting wholly or mainly of wood;
“works” includes a sawmill or any other premises where relevant activities are carried on.