Summary: Residents of communities like Richmond, Martinez and Benicia are angry after finding out that a hydrogen stack at the Valero refinery in Benicia was releasing chemicals at levels hundreds of times higher than the legal limit for years. Government regulators knew — but had kept it a secret since 2019. Chronicle reporter Julie Johnson breaks down the story with host Demian Bulwa. | Unlimited Chronicle access: sfchronicle.com/pod Learn more about your ad choices. Visit megaphone.fm/adchoices
