Core-Mark is celebrating the grand opening of the new GAIN® Clean Fuel compressed natural gas (CNG) station that will fuel its fleet of alternative energy trucks. The station, located at 8346 E. Martin Luther King Junior Boulevard, Tampa, Florida, was built through a partnership with U.S. Gain, a division of U.S. Venture, which owns and operates the GAIN Clean Fuel brand. It is the last of five stations to go into operation under this partnership.