Owners of the oil pipeline that ruptured in California this week must take numerous corrective measures, including an in-depth analysis of factors contributing to the spill, before they can restart the line, federal safety officials said on Friday. The corrective action order issued on Thursday by the U.S. Transportation Department’s Pipeline and Hazardous Materials Administration is not regarded as a disciplinary enforcement sanction against the company, Texas-based Plains Pipeline LP, officials said. But it requires Plains to perform a detailed and lengthy list of actions before the oil line resumes operations, starting with removal of the failed pipe for metallurgical examination, purging the line of remaining petroleum and independent review of inspection results. It also requires a “root-cause analysis” of the spill, exploring not only the direct cause of the failure, but “every contributing factor” that may have played a part, including any safety compliance issues, said […]