The hazardous-materials crew was joined by firefighters from Garden City and Port Wentworth to investigate the possible spillage, at the container operations yard just inside Gate 5 of the Ports Authority, said Mark Keller, spokesman for Savannah Fire & Emergency Services.
"We don't have a positive identification on the chemical at this point," Mr. Keller said at 10:30 p.m. "We're just seeing if we can identify it so we have a better handle on how to go about containing it or cleaning it up."
By 11 p.m., firefighters had "found no evidence of any spillage or ongoing leaking of anything," he said, adding that crews were heading back into the yard to double-check for elevated readings or chemicals in the air.
Savannah Fire also sent truck and engine companies to the operation. Fire crews from Savannah/Hilton Head International Airport also responded.