AES
American Electric Power
Alabama Power Co.
Arizona Public Service
Anheuser-Busch
BP Amoco Chemicals
Buell Fisher Klosterman
Carolina Power & Light
City of Hamilton
Conectiv Energy
Constellation Energy
Croda Chemical
Covanta Energy
Duke Power
East Kentucky Power Coop
Entergy
Exelon Power Corp
Formosa Plastics
Foster Wheeler
FPL Energy
Greenville Steam Co.
General Electric
Georgia Power Co.
Gerresheimer Glass
International Paper
Jack Daniels
Jacobs Engineering

Kapstone Charleston Kraft, LLC
Kimble Glass
Kvaerner Power
Luminant Generating Co. (TXU)
McKillup Engineering
Metso Power
Mirant Mid Atlantic
North American Power
NRG Energy Inc.
Pennysylvania Power & Light
Penn State University
Platt River Power Authority
Progress Energy
Public Service Co. Of New Mexico
Reliant Energy
Santee Cooper
South Carolina Electric & Gas
Southern Company
Sunoco
Tennesse Valley Authority
Texas Industries TXI
Toho Tenax America
TXU (Texas Utilities)
US Salt
Valley View Sales and Services
Veolia Environmental Services
Verso Paper