(CNN) The US Coast Guard thinks the environmental impact from an overturned cargo ship along the Georgia coast is limited so far, Cdr. Norm Witt said Tuesday.

"We don't have any indications at this point that we have a major release" from the 656-foot Golden Ray that capsized in St. Simons Sound, Witt told reporters. Everyone is safe after rescuers saved the final four men trapped on the ship on Monday.

He said spill management crews have used booms as part of a pollution mitigation effort and are trying to retrieve fuel and oil that has come from the ship that was set to haul 4,200 vehicles to Baltimore. They are also trying to seal fuel vents, where fuel can escape now that the ship is on its side.

"I can't tell you that there won't be any pollution. There is pollution as of right now. It's limited in scope," he said.

People on Monday watched from Jekyll Island as rescuers tried to reach crew members of the Golden Ray.

CNN reached out to several environmental groups in the area, and they all said it was too early to tell what impact the spill has had.

Read More