(Reuters) -BP has restarted its Olympic Pipeline that had leaked roughly 25,000 gallons of gasoline near Mount Vernon in Washington state, a source familiar with the pipeline’s operations said on Thursday. The pipeline was restarted following repairs, integrity testing, and regulatory approval of the restart plan, the source said. The company has been cleaning up the spill since Sunday with the U.S. Environmental Protection Agency (EPA) and local officials. Nearly 7,000 gallons had been recovered, according to the latest update from BP and the EPA on Wednesday, which added that at least one Am…