PCB 73-278

		PCB 73-278 05/16/74 Order CLARK OIL AND REFINING CORPORATION v. ENVIRONMENTAL PROTECTION AGENCY
		PCB 73-278 06/20/74 Order CLARK OIL AND REFINING CORPORATION v. ENVIRONMENTAL PROTECTION AGENCY
		PCB 73-278 07/18/74 Opinion and Order CLARK OIL & REFINING CORPORATION v. ENVIRONMENTAL PROTECTION AGENCY