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Amy Taxin
Associated Press

It's been nearly a week since oil from a ruptured underwater pipeline first appeared in the waters off Southern California and there's still no confirmation of exactly how much leaked.

The company that owns and operates three offshore platforms and the pipeline has said publicly that no more than 126,000 gallons leaked. But Houston-based Amplify Energy also told federal investigators the total amount may only be 29,400 gallons.

On Thursday, U.S. Coast Guard Capt. Rebecca Ore said five federal and state agencies assessed pipeline data and determined that at least about 25,000 gallons of crude spilled. No more than 132,000 gallons spilled, she said, adding that's a maximum scenario and has not been confirmed.

"The minimum release number is the number we have right now and I would expect that number to change. I don't expect it to change significantly, but it will continue to be refined," Ore said during a briefing in Huntington Beach.

David Pettit, a senior attorney at Natural Resources Defense Council who worked on the response to the massive Deepwater Horizon oil spill in the Gulf of Mexico, said the amount of oil spilled into the ocean should be easily and quickly known to Amplify.

"If they know what the flow rate was in the pipeline, and how much the pressure dropped, and for how long, you could calculate that in a matter of minutes," Pettit said. 

"This is money to them," he added. "They know how much they lost, I am certain of that." 

Local officials, who feared an environmental catastrophe at first, have more recently voiced hope that the total spillage will be less than initially feared when a putrid smell swept the coast south of Los Angeles last weekend and blobs of crude began washing ashore. 

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California Gov. Gavin Newsom offered some optimism about the size of the spill when he visited the site on Tuesday. But he cautioned the cleanup still requires massive resources and residents still can't fully use their beloved beaches or swim and surf in the waters in the affected area that stretches about 15 miles from Huntington Beach to Laguna Beach.

"You still have the spread, even if it's substantially less gallons, that have to be cleaned up," Newsom said. "So this is going to take time to clean up."

The Coast Guard is investigating whether a ship's anchor might have snagged and bent the pipeline owned by Amplify that shuttles crude from the offshore platforms to a facility on shore in Long Beach. A slit in the pipeline occurred about 5 miles offshore at a depth of about 98 feet, investigators said.

Officials have been cleaning up the spill by skimming oil off the surface of the ocean, erecting protective booms to keep crude out of sensitive wetland areas and dispatching workers to collect blobs of oil on beaches. So far, they have collected 5,544 gallons of crude, according to the Unified Command, which includes federal and state officials and Amplify.

But many say the miles-wide area of oily sheen on the water's surface off the Orange County coast doesn't reveal the spill's size as crude oil may remain beneath. "That is just a hint as to what the volume was," Pettit said. "Most of the stuff is below the surface and looking at the sheen doesn't tell you how deep this stuff is."

Sarah Bedolfe, a marine scientist with ocean advocacy group Oceana, said those responsible for oil spills are on the hook for damages, so early spill estimates tend to be lower than final amounts.

"The industry has a long, documented history of a deficient safety culture and the delays in reporting this spill suggest nothing has changed," she said.


This story has been updated to correct that Gov. Gavin Newsom visited the site on Tuesday, not Wednesday. 

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