Published June 24, 2020 at 943 × 720 in Could PSM Petition Head Off Suits? The 2012 Chevron Richmond fire sparked changes to Cal/OSHA’s PSM standard, but the state’s oil industry thinks they’ve gone too far. The 2012 Chevron Richmond fire sparked changes to Cal/OSHA’s PSM standard, but the state’s oil industry thinks they’ve gone too far.