PCB 72-470

		PCB 72-470 01/16/73 Order ENVIRONMENTAL PROTECTION AGENCY v. CHICAGO MAGNESIUM CASTING COMPANY, an Illinois corporation
		PCB 72-470 04/17/73 Opinion and Order ENVIRONMENTAL PROTECTION AGENCY v. CHICAGO MAGNESIUM CASTINGS COMPANY
		PCB 72-470 05/17/73 Opinion and Order ENVIRONMENTAL PROTECTION AGENCY v. CHICAGO MAGNESIUM CASTING COMPANY