The cleanup efforts on the Gulf Coast in response to the Deepwater Horizon oil spill have entered a new phase, with the oil company BP announcing that it is ending its “active cleanup” of Louisiana’s coast almost four years after the disaster.

In a statement, BP said that the Coast Guard ended patrols on Tuesday of the final three miles of affected shoreline in Louisiana.

Still, the Coast Guard stressed that a more narrow cleanup response would continue and that crews would remain on the Gulf Coast to respond to new reports of oil. Teams will be positioned to provide a rapid response when they are needed, the Coast Guard said in a statement on Tuesday night.

“Let me be absolutely clear: This response is not over — not by a long shot,” said Capt. Thomas Sparks, the federal on-scene coordinator for the Deepwater Horizon Response. The transition to the new phase of the response, he said, “does not end cleanup operations, and we continue to hold the responsible party accountable for Deepwater Horizon cleanup costs.”