Environmental activists partied outside the San Francisco Ferry Building on Friday to celebrate the decommission of a Southern California oil rig.

The Center for Biological Diversity called the event a “retirement party” for Platform Esther, a soon-to-be decommissioned oil rig off the coast of Orange County.

Activists donned party hats and performed their own rendition of Kool & the Gang’s Celebration , renamed Decommission. They danced with a giant inflatable whale, and tore into a blue-iced cake decorated with a paper cutout of an oil rig.

Inside the Ferry Building, the California State Lands Commission officially finalized the decommission at a hearing.

“This is actually a historic win. This platform is being retired about fifteen years ahead of the official end of its useful

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