SHECO/PCS
		AES Deepwater Inc.
		Afton Chemical (Ethyl)
		AGRIFOS
		AIR PRODUCTS AND CHEMICALS INC
		Akzo Nobel
		Alfred Conhagen, Inc.
		Alfred Conhagen, Inc. of Texas
		Altivia
		Arkansas Electric
		Arkema
		BASF CORPORATION
		BASIC EQUIPMENT
		BAYER CORPORATION
		Bio Select Fuels
		BP Texas City
		CELANESE CORPORATION
		CHEVRON CHEMICAL COMPANY
		Chevron Phillips
		Conoco Phillips
		Crosstex
		E.I. DUPONT
		EL DORADO CHEMICAL CO
		ENBRIDGE PIPELINES
		ENBRIDGE PROCESSING
		ENOGEX (OG&E Energy)
		Entergy Utility Co.
		
		Enterprise Products
		EVALCA
		Formosa Plastics
		GB Bioscience
		Graco Mechanical
		GULF BAYPORT CHEMICALS
		Heat & Power Boiler Service
		Huntsman Polymers
		I.P.S.L.
		INTERNATIONAL PAPER CO
		INVISTA
		JACOBS ENGINEERING GROUP INC
		Kinder Morgan
		KOCH NITROGEN
		Letsos
		Liquid Minerals Group, Inc.
		LUBRIZOL
		Martin Asphalt Co.
		MEADWESTVACO
		MEMC
		Methanex Chile Ltd.
		Nova Molecular
		OCCIDENTAL CHEMICAL COMPANY
		PCS Nitrogen
		Pilot Chemical
		Point Lisas Nitrogen Ltd.
		PPG INDUSTRIES
		Proplant Inc.
		Regency Gas
		S AND B ENGINEERS AND CONSTRUCTORS
		Sep-Pro Systems, Inc.
		Dupont
		3M
		AK STEEL
		Apache
		Apache Nitrogen
		DAK AMERICAS
		Daniel Systems
		Dupont
		Energen
		English Boiler
		GOODYEAR
		Graphic Pkg. Int'l
		Int'l. Paper
		Invista
		Koch
		OLIN
		Praxair
		Simplot
		Tenaska
		Twin Rivers PP
		Shin-Etsu
		SI GROUP
		South Texas Electric
		Suez Energy Generation
		TARGA
		Terra Industries
		Texas Childrens Hospital
		Texas Compressor Corp.
		Thermal and Mechanical Equipment Co.
		TMEC
		Toshiba America
		Total Petrochemical
		Transtex Gas
		Tronox
		Tronox LLC
		Wood Group Power Operations