Exxon Mobil Corp has begun groundwork at a Texas refinery that would become the largest in the United States in advance of a final investment decision on the expansion, three sources familiar with Exxon’s plans said. FILE PHOTO: A logo of the Exxon Mobil Corp is seen at the Rio Oil and Gas Expo and Conference in Rio de Janeiro, Brazil September 24, 2018. REUTERS/Sergio Moraes – File Photo The company also has begun hiring and training staff to operate what would be a third crude distillation unit at the site. The expansion would increase crude processing capacity at its Beaumont, Texas, refinery by at least 300,000 barrels per day (bpd) from the current 365,644 bpd, the sources said. The proposed unit would convert crude oil from Texas shale fields into refined products, including diesel and gasoline. Exxon wants to triple daily crude production in the […]