PCB 87-150

		PCB 87-150 06/07/90 Order NATURAL GAS PIPELINE COMPANY OF AMERICA v. ILLINOIS ENVIRONMENTAL PROTECTION AGENCY
		PCB 87-150 06/20/91 Order NATURAL GAS PIPELINE COMPANY OF AMERICA v. ILLINOIS ENVIRONMENTAL PROTECTION AGENCY
		PCB 87-150 09/08/88 Order NATURAL GAS PIPELINE COMPANY OF AMERICA v. ILLINOIS ENVIRONMENTAL PROTECTION AGENCY
		PCB 87-150 10/06/88 Order NATURAL GAS PIPELINE CO. OF AMERICA v. ILLINOIS ENVIRONMENTAL PROTECTION AGENCY
		PCB 87-150 10/11/90 Order NATURAL GAS PIPLINE COMPANY OF AMERICA v. ILLINOIS ENVIRONMENTAL PROTECTION AGENCY
		PCB 87-150 11/29/90 Order NATURAL GAS PIPELINE COMPANY OF AMERICA v. ILLINOIS ENVIRONMENTAL PROTECTION AGENCY