Hamon Research-Cottrell: Sommerville, NJ

Valero Refining Company: Paulsboro, NJ

Dominion Power: Chesterfield, VA

Conoco-Phillips Company: Bayway, NJ

PEMEX: Minatitlan, Mexico

James River Cogeneration: Hopewell, VA

Cholla Environmental Partners: Joseph City, AZ

ExxonMobil Refining: Joliet, IL

Valero Refining Company: Delaware City, DE

Minnesota Power: Boswell Station, MN

Sun Coke:Granite City, IL

Hess Refining: Port Reading, NJ

Sun Coke: Middletown, OH

Merck: West Point, PA

Conectiv: Edgemoor,DE

Sun Chemical: Marcus Hook, PA

Conoco Phillips: Trainer, PA

Croda: New Castle, DE

Delcora: Chester, PA

NRG: Indian River, DE

NuStar Refining: Paulsboro, NJ

Solvay Solexis: Thorofare, NJ