Earlier this week, the French company awarded Fluor's Energy and Chemicals Group the contract to provide additional facilities on the site including a coker, a desulphurisation unit, and vacuum distillation equipment.
The refinery will process heavy and sour crude oil, and the expanded facilities at Port Arthur will allow the production of an additional 3M tonnes-per-year of ultra-low sulphur automotive diesel at the refinery.
Fluor Energy & Chemicals Group president, David Seaton, said: "We are excited to help Total pursue its strategy to enhance the efficiency and competitiveness of its large worldwide refining hubs and specifically with this significant Port Arthur project.
The new award means that Fluor will be involved in all stages of the delivery process from front-end engineering and design (FEED), to procurement and construction.
He added: "Our recently completed FEED work for this site, coupled with a previous project for a gasoline hydrotreater at Port Arthur, enhances our ability to fulfil Total's business and operational objectives for this important project."
Construction work on the coker unit is expected to be complete by 2011, when the site is scheduled for commissioning.