JEDDAH: Saudi Aramco has announced Friday the completion of its Ras Tanura diesel hydrotreater plant. The diesel hydrotreater is capable of processing 105,000 barrels per day of 10-parts-per-million (ppm) ultra-low-sulfur diesel. The project was part of Saudi Aramco's Environmental Master Plan, which was launched in 2001 to identify and implement capital projects that lighten the environmental footprint of the company and the products it produces, the company said. The hydrotreater is situated in the middle of Ras Tanura Refinery and surrounded by operating facilities that continued to operate during construction of the hydrotreater. Yanbu' and Riyadh diesel hydrotreaters produce 500 ppm low-sulfur diesel. By 2015, the Kingdom's new sulfur specification will be 10 ppm, meaning the Ras Tanura diesel hydrotreater will be able to meet the future sulfur specification without any additional capital investment, the company added.