USGS THE MINERAL INDUSTRIES OF CENTRAL AMERICA: BELIZE, COSTA RICA, EL SALVADOR, GUATEMALA, HONDURAS, NICARAGUA, AND PANAMA By Pablo Velasco, 2001 Its principal assets in the country comprise Xan Field, La Libertad refinery, and 475 kilometers pipeline with six pumping stations connecting Xan and Rubelsanto fields to the Piedras Negras Terminal on Guatemala's Atlantic coast.