Advertisement

Did O.C. oil spill come from natural seepage or drilling? Investigators continue to probe cause

Huntington Beach, CA - March 08: Andrew Christenson, who got oil stuck to his feet, and his dog Lola check out tar balls at the high tide line at Huntington Dog Beach in Huntington Beach Friday, March 8, 2024. Roughly 2.5-mile-long oil slick was spotted today off the coast of Huntington Beach, but its source remained unclear. According to the Coast Guard, the slick is about 1.5 miles off the coast. ``Aerial surveys are planned to assess the size and potential impacts,'' Coast Guard officials said on social media. Photo taken in Huntington Beach Friday, March 8, 2024. (Allen J. Schaben / Los Angeles Times)
Andrew Christenson, who got oil stuck to his feet, and his dog, Lola, check out tar balls at the high tide line Friday at Huntington Dog Beach in Huntington Beach. (Allen J. Schaben / Los Angeles Times)

For the record:
2:24 p.m. March 11, 2024: An earlier version of this article stated that a Coast Guard official said the oil spill was caused by natural seepage from the ocean floor off Huntington Beach. Officials later announced the cause is still under investigation.

Coast Guard officials have not determined what caused an oil sheen that appeared off the coast of Huntington Beach last week, officials said Monday afternoon.

The sheen was first reported Thursday evening about 2.5 nautical miles off Huntington Beach near two oil platforms, Emmy and Eva. By Sunday morning, officials were no longer seeing a sheen in the water, according to the Coast Guard, but they had skimmed about 85 gallons of oil from the ocean and removed about 1,050 pounds of oily waste and tar balls from the shoreline.

Coast Guard spokesperson Richard Uranga told The Times on Monday that the testing revealed the oil was from a natural seep. However, hours later, another Coast Guard official, Rick Brahm, told The Times that was not the case. Officials are still trying to determine what caused the spill, he said.

Read more: Oil sheen confirmed off Huntington Beach; Coast Guard investigating

The location of the seep is not far from the site of a large spill in 2021 that occurred when a ship's anchor punctured an underwater oil pipeline in San Pedro Bay, sending 25,000 gallons of crude gushing into the waters off Huntington Beach. Cleanup from that spill spanned months and resulted in criminal charges and years of litigation.

"This situation isn't even remotely close to what we saw in 2021," said Jennifer Carey, a Huntington Beach spokesperson.

Investigators are using a technology that enables them to basically fingerprint the oil they gathered in the ocean and match it to either a platform, vessel, pipeline or determine whether it was the result of something naturally occurring, Orange County Supervisor Katrina Foley said.

"They have a database of all of the different kinds of crude and petroleum and oil generated from these different rigs and vessels, so they can pretty much match it to a particular operator," she said.

One bird — a Brandt's cormorant — that had oil on it died over the weekend. An injured snowy plover that was captured did not have oil on it but also died. Officials are caring for a common loon and a western grebe that were recovered with oil on their bodies.

Tar balls continued to wash up Monday on the sand in Huntington Beach, including at the popular dog beach. City officials do not have plans to close the beaches but advise visitors not to touch any tar that washes up along the shore.

Neighboring beach cities have not reported any signs of oil residue on their shores.

Read more: The O.C. oil spill could have been a much bigger disaster. Here is what went right

When the oil sheen was first reported there were some surfers who were hesitant to head into the water. Locals remember the months-long ordeal after the 2021 spill. But by Monday morning — with cleanup crews gone — the overall sense of concern had dissipated, said Jakob Sorensen, an employee at Katin Surf Shop.

"There are some people heading back in to test the waters," Sorensen said.

Sign up for Essential California for news, features and recommendations from the L.A. Times and beyond in your inbox six days a week.

This story originally appeared in Los Angeles Times.