It is a "small handful" of lookers, Meehan said.
The oil companies announced in September plans to sell or close their refineries in the Philadelphia area, citing deteriorating market conditions for fuel.
ConocoPhillips is shutting down its plant in Trainer by the end of the year. Sunoco announced this month that it will shut down its Marcus Hook plant immediately, and not keep its Philadelphia refinery open later than July.
Public officials have rallied support to keep the plants open and to try find a buyer. "We're all standing by to help if there's any way we can," said U.S. Sen. Pat Toomey, a Republican.
U.S. Rep. Bob Brady (D., Pa.) and labor leaders were annoyed that the oil companies sent midlevel representatives who were unable to provide much detail.
"We're not talking to the top people of Sunoco or Conoco," said Brady. "That's wrong."
Sunoco spokesman Thomas P. Golembeski, who was not present at Monday's meeting, said the company is bound by nondisclosure agreements and unable to offer many details about potential buyers. Tactically, the company also does not want to tip its hand with potential buyers.
"Selling a refinery is a complex undertaking," he said. "It takes time."
Some officials are still sore at Sunoco for its surprise announcement this month to shut down Marcus Hook now rather than waiting until July.
Golembeski said the Philadelphia company lost more than $800 million refining oil since 2009, almost a million dollars a day for three years. "To continue operating Marcus Hook potentially threatens the company," he said.