Part I Alkali Works and Alkali Waste 1Condensation of hydrochloric acid gas in alkali works. 2Prevention of discharge of noxious and offensive gas in alkali works. 2ARelation to Environmental Protection Act 1990, Part I. 3—5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Part I