The news comes days after Plains and one of its employees were charged with violating California law in the 2900-barrel spill, which occurred in May 2015 after the company's Line 901 ruptured. Plains faces up to $2.8 million in fines from the state plus additional costs and penalties.
In its final report on the pipeline failure released Thursday, the US Pipeline and Hazardous Materials Safety Administration identified corrosion as the direct cause of the rupture.
