In support of MTA NYCT’s alternatively-fueled bus program, as a subcontractor to Fuel Solutions, we developed a comprehensive database of Compressed Natural Gas (CNG) bus fueling station engine specifications and operating procedures to assess compliance with the federal New Source Performance Standards (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP). In addition, we are working with equipment vendors to develop specifications for air pollution control equipment.