UPS is expanding its San Antonio, Texas, package processing facility in a move that will add 150 more delivery vehicles and 40 Class 8 tractors powered by compressed natural gas (CNG), the company announced.

The expanded ground sorting facility will be retrofitted with automated sorting systems and have twice the package processing capacity. The additional capacity is necessitated by area business growth and increasing customer needs in south Texas.

"UPS continuously invests in our integrated delivery network," said Craig Wiltz, president of the company's Red River District. "Population and business growth throughout Texas are driving demand for our services and this facility expansion exemplifies one aspect of our ongoing approach to meeting that demand."

The project will expand the UPS fleet of delivery vehicles, known as called "package cars," to more than 340 in San Antonio. The natural gas tractors will be fueled by a new on-site CNG fueling station. Each tractor will displace approximately 25,000 gallons of diesel fuel each year with clean burning natural gas.

The expansion will add about 171,000 square feet, bringing the building's footprint to more than 330,000 square feet. The building sits on more than 40 acres of land and serves UPS customers in Bexar, Comal, Guadalupe, Wilson, Medina and Kendall counties. The building's team will continue to provide package pickup and delivery services during the project, which is expected to be complete mid-2017.