PCB 79-161

		PCB 79-161 07/24/80 Interim Order STEPAN CHEMICAL COMPANY v. ILLINOIS ENVIRONMENTAL PROTECTION AGENCY
		PCB 79-161 09/04/80 Order STEPAN CHEMICAL COMPANY v. ILLINOIS ENVIRONMENTAL PROTECTION AGENCY
		PCB 79-161 11/19/81 Opinion and Order STEPAN CHEMICAL COMPANY v. ILLINOIS ENVIRONMENTAL PROTECTION AGENCY