Substances added to CEPA Schedule 1.  Canadian Environmental Protection Act, 1999 is amended by adding five substances and a group of substances to Schedule 1 (List of Toxic Substances) . The substances include Methyloxirane, Ethyloxirane, Naphthalene, Toluene diisocyanates, 1,2-Benzenediol, and 1,4-Benzenediol.