Philadelphia Energy Solutions (PES) is expected to seek to permanently shut its oil refinery in the city after a massive fire caused substantial damage to the complex, two sources familiar with the plans said on Tuesday. Shutting the refinery, the largest and oldest on the U.S. East Coast, would cost hundreds of jobs and squeeze gasoline supplies in the busiest, most densely populated corridor of the United States. The refinery, which could still change its plans, is also expected to begin layoffs of the 700 union workers at the plant as early as Wednesday, the sources said. The layoffs could include about half of the union workforce, with the remaining staff staying at the […]