Alabama

• Coastal Refining
• Hunt Refining
• Shell Chemical

Alaska

• ARCO Alaska
• Petro Star
• Tesoro Alaska Co.
• Williams Alaska Petroleum

Arkansas

• Berry Petroleum
• Cross Oil
• Lion Oil

California

• Anchor Refining
• Atlantic Richfield
• Bakersfield Refining Company
• Chevron
• Equilon
• Exxon USA
• Greka Energy
• Huntway Refining
• Los Angeles Refining Company
• Martinez Refining Company
• Mobil
• Occidental Oil Co. Refinery
• Paramount Petroleum
• San Joaquin Refining
• Shell Oil Refinery-Bella Vista
• Shell Oil Refinery-Domingos
• Shell Oil Refinery-Martinez
• Tosco Refining
• Ultramar Diamond
• Union Oil Cracking Plant
• Union Oil Refinery-Carson
• Union Oil Refinery-El Segundo
• Union Oil Refinery-Rodeo
• Union Oil Refinery-San Pedro
• World Oil

Colorado

• Conoco
• Ultramar Diamond

Delaware

• Delaware City Refinery
• Motiva Enterprises

Georgia

• Young Refining

Hawaii

• Chevron
• Tesoro Hawaii

Illinois

• Citgo Petroleum
• Clark
• Marathon
• Mobil Oil
• Equilon

Indiana

• BP Amoco
• Countrymark Cooperative
• Laketon Refining

Kansas

• Farmland Industries
• Frontier Oil
• National Cooperative

Kentucky

• Marathon
• Somerset Refinery

Louisiana

• American International
• BP Amoco
• Calcasieu Refining
• Canal Refining
• Cit-Con Oil
• Citgo
• Conoco
• Convent Refinery
• Exxon
• Marathon
• Mobil
• Murphy Oil USA
• Orion Refining
• Norco Refining Company
• Pennzoil
• Placid Refining
• Shell Chemical
• Valero Energy

Michigan

• Marathon

Minnesota

• Koch Petroleum
• Marathon

Mississippi

• Chevron
• Ergon Refining
• Southland Oil

Montana

• Cenex Harvest States
• Conoco
• Exxon
• Montana Refining

Nebraska

• Phillips Petroleum Fertilizer Plant

Nevada

• Foreland Refining

New Jersey

• Amerada-Hess
• Tosco Refining
• Valero Energy

New Mexico

• Giant Refining
• Navajo Refining

North Dakota

• BP Amoco

Ohio

• BP Amoco
• Clark Refining
• Marathon
• Sunoco

Oklahoma

• Conoco
• Gary-Williams Energy
• Sinclair Oil
• Sunoco

Oregon

• Shell Oil Refinery-Portland

Pennsylvania

• American Refining
• Pennzoil
• Sunoco
• Tosco
• United Refining

Tennessee

• Williams Energy

Texas

• AGE Refining
• BP Amoco
• Chevron
• Citgo
• Clark Refining
• Coastal Refining
• Crown Central Petroleum
• Exxon
• Fina Oil
• Koch
• Lyondell-Citgo
• Marathon
• Mobil
• Motiva Enterprises
• Phillips Pride Refining
• Port Aruthur
• Shell Deer Park Refining
• Specified Fuels
• Ultramar Diamond
• Valero Energy

Utah

• BP Amoco
• Chevron
• Inland Refining
• Phillips Petroleum
• Standard Oil Refinery-Salt Lake City

Virginia

• BP Amoco
• Primary Refining

Washington

• Atlantic Richfield
• Equilon
• Sound Refining
• Puget Sound Refining Company
• Shell Oil Refinery-Anacordes
• Tesoro West Coast
• Tosco Refining
• US Oil and Refining

West Virginia

• Ergon-West Virginia

Wisconsin

• Murphy Oil USA

Wyoming

• Frontier
• Little America Refining
• Sinclair Oil
• Standard Oil Refinery-Casper
• Texaco Oil Refinery
• Wyoming Refining