For the purposes of this Chapter:
1° Activity involving chemical agents means any work in which chemical agents are used or intended to be used in any process, including production, handling, storage, transport, disposal and treatment, or in the course of which such agents are produced;
2° Chemical agent means any chemical element or compound, either in its natural state or in a mixture, as it occurs in nature or as it is produced, used or released, in particular in the form of waste, as a result of a professional activity, whether or not it is intentionally produced and whether or not it is placed on the market.