On Friday, federal accident investigators told California legislators that the state’s patchwork of oil industry regulations needs a serious overhaul. The Chevron fire that produced a toxic cloud and sent 15,000 people to the hospital could have been prevented, but the system was reactive and not designed to foresee and forestall problems, said the U.S. Chemical Safety Board. Duh. The board didn’t need 18 months to come to that conclusion.