Marine diesel fuel spill was reported at the APM Terminal in Bayonne, New Jersey, on April 25, according to the US Coast Guard.
APM Terminal notified the National Response Center that the fuel spilled into Newark Bay while a ship was refueling pier-side at the terminal.
The source of the spill has been secured and Coast Guard pollution responders were sent to the scene.
Commercial clean-up crews have deployed boom to contain as much of the fuel as possible, while simultaneously recovering product from the waterway.
Coast Guard marine inspectors are also on scene to assess the condition of the vessels involved and the National Oceanic and Atmospheric Administration is providing trajectory models to assist in the product recovery.
An investigation was launched to determine the size and cause of the spill.