ACES Advance Fuel Systems AFV International Air & Gas Technologies Alagasco ALL-CRAFT American Power Group Inc. Anadarko Petroleum Corp. ANGI International, LLC Apache Applied LNG Technologies USA, LLC Arkansas Oklahoma Gas Atlanta Gas Light AVSG LP BAF Technologies Baker Equipment Baytech Corporation Bill Barrett Corp. Black Hills Energy Blue Bird Corp. Blue Water Area Trans. Commission Cabot Oil and Gas Corp. Carter Cryogenics Centra Area Transportation Authority CF Kioshi Energy Chart Industries Chesapeake Energy Cimarex Energy City of Las Vegas Clean Energy Fuels Corp. Clean Fuels Consulting CleanFuel Conversions Clearwater Gas System CNG Cylinders International CNG Sales, LLC CNG Service of Arizona Continental Controls CP Industries Cummins Westport Devon Energy Corp Diesel 2Gas DTE Energy Dynetek Industries, Ltd. El Paso Corp. Emission Solutions, Inc. Enbridge Gas Distribution Inc. EnCana Energen Energy Transfer Engineered Energy Solutions Enviromech Industries EOG Resources EQT Corporation FAB Industries LLC Faber Industrie S.p.A. FirmGreen Fuel Shop Fuel Solutions Gas Equipment Systems Gas Technology Institute Gilbarco Gladstein & Associates GreenField Compression, Inc. Heil Environmental Hocking College Honda Motorwerks IMPCO Technologies IMW Industries Ltd. Joe Cooper Ford J-W Power Kirk Energy Kraus Global Inc. Laclede Gas Company Landi Renzo Larado Petroleum Lazard Capital Markets Lincoln Composites, Inc. Linde Linn Energy Luxfer/Hydrospin Gas Cylinders Metropolitan Utility District of Omaha Micro Motion NatGasCar National Grid Natural Drive NEOgas, Inc. Newfield Exploration Company New York City DOT Noble Energy Inc. NGV Institute OEM Systems Omnitrans Orange Co. Transportation Authority P.C. McKenzie PetroCard Systems, Inc. PetroHawk Energy Corp. Phoenix Energy Pioneer Natural Resources Plains Exploration and Production Professional Engineering Consultants Prometheus Energy Company Public Service of North Carolina (SCANA) Questar Regulated Services Quicksilver Resources Range Resources Raymundo Engineering Rotarex, Inc. San Diego Gas & Electric® (SEMPRA) SandRidge Energy, Inc. Saybr Contractors, Inc. Seneca Resources Corp. Southwestern Energy Southern California Gas Company(SEMPRA) Southern Carolina Electric & Gas (SCANA) South Jersey Gas Company Spectrum Energy Services SSP Fittings Corp. St. Mary’s Land & Exploration Structural Composites Industries Suburban Ford of Sterling Heights Swagelok Co. Talisman Energy TECO Energy Texas General Land Office Thomason & Associates Titeflex Corporation TransEco Energy Trillium USA Tulsa Gas Technologies UGI Utilities, Inc. Universal Air Products UPS U.S. Postal Service Vermont Gas Waste Management We Energies WEH Technologies Inc. Williams Companies Woodward Governor Xebec XTO Energy
