Hamon Research-Cottrell: Sommerville, NJ

Valero Refining Company: Paulsboro, NJ

Shell Refining Company: Anacortes, WA

Dominion Power: Chesterfield, VA Tesoro

Corporation: Anacortes, WA

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