Brazil regulator says Chevron could have avoided spill RIO DE JANEIRO (Reuters) - Brazil oil regulator ANP said U.S. oil company Chevron Corp could have avoided an oil spill at its offshore Frade field in November if it had done a better job interpreting geological data, the regulator's director Magda Chambriard said on Thursday. The regulator said fines would be announced within 30 days, based on its final report. Reporting by Sabrina Lorenzi; Writing by Asher Levine; and Reese Ewing; Editing by Gerald E. McCormick