The investigation into what lead to one of the biggest oil spills in Southern California history is continuing, and we're learning more about the response.

Investigators say the company that operates the pipeline off Orange County had contingency plans in place for a leak, but officials at Amplify Energy did not put it into action before 126,000 gallons of oil leaked into the Pacific.

After an alarm went off in a company control room at 2:30 a.m. Saturday, signaling a rupture, the company waited until 6:01 a.m. to shut down the pipeline.

The company then took another three hours to notify the U.S. Coast Guard, further slowing the response.

Investigators are still trying to determine what took Amplify so long to act.  The company's C-E-O previously said they only learned of a leak after boaters reported a sheen.