Sunoco Logistics Partners LP is set to announce Tuesday it will hire about 20 new operators and technicians at its Marcus Hook Industrial Complex to accommodate an increase in business related to its Mariner East pipeline projects.

Delaware County Council and Sunoco Logistics have scheduled a news conference to announce the addition of around 20 new permanent positions to the current workforce of 180 people at Marcus Hook, said Jeff Shields, spokesman for Sunoco Logistics. The payroll for the entire workforce is about $16 million.

Sunoco Logisitics also currently employs about 2,200 temporary construction workers at the Marcus Hook complex, who are transforming the former refinery site into an energy terminal for products that are delivered through the Mariner East pipeline, which originates in the Marcellus and Utica Shale formations.