(Emergency Planning and Community Right-to-Know regulations) To produce, prepare, import
or compound a toxic chemical. The term manufacture also applies to a toxic chemical that is
produced coincidentally during the manufacture, processing, use or disposal of another chemical
or mixture of chemicals, including a toxic chemical that is separated from that other chemical or
mixture of chemicals as a byproduct, and a toxic chemical that remains in that other chemical or
mixture of chemicals as an impurity.