AmeriGas Propane, L.P./PTI
Amspec Services LLC
Anadarko Petroleum Corporation
Argus Media
Astra Oil
Atlantic Trading & Marketing, Inc.
Aux Sable Liquid Products
BASF Corporation
Bentek Energy LLC
BP Products North America Inc.
Braskem America
British Gas Group
Buckeye Partners
Chevron Products
ChevronPhillips Chemical Co., L.P.
ConocoPhillips
Crosstex Energy Services
DCP Midstream
Devon Gas Services
Dow Hydrocarbons and Resources Inc.
Eastman Chemical Company
El Paso Corporation
En*Vantage, Inc.
Enbridge
Enogex
Enterprise Products Operating L.P.
ESAI
Ethylene Strategies International LP
Factor Gas Liquids
Flint Hills Resources
Formosa Plastics Corp., USA
Gavilon
Glencore LTD
Hess Energy Service Co.
HIS Chemical (CMAI)
ICE
Inergy Partners
INEOS
Intercontinental Terminals Company
Koch S & T
LDH Energy
Lonestar NGL LLC
Lyondell (Equistar) Chemicals
Marathon Petroleum Company LP
MarkWest Energy Partners, LP
Martin Midstream/Prism Gas
Midstream Energy Consultants
Nova Chemicals
Occidental Energy Venture Corp
Oiltanking Houston, LP
Oneok Hydrocarbons
OPIS
Petral Worldwide Inc.
Purvin & Gertz, Inc.
Sasol North America Inc.
Shell Trading
Targa Resources
Tauber Oil Co.
Taylor Gas Liquids, Inc.
Texon LP
TOTAL Petrochemicals
TPC Group
Trafigura
Valero Marketing & Supply Co.
Vinmar Oversees
Vitol S.A., Inc.
Westlake Petrochemicals
Williams Olefins
Wood MacKenzie

10/14/2011