Scott Robles was airlifted from the accident scene Tuesday suffering from burns. Officials with Kern Medical Center said Wednesday that he had been discharged.
Robles was part of a two-person crew using a torch to remove pipes for a scrap metal recycling company when vapors inside the tank ignited and caused the explosion.
Kern County sheriff's officials say 24-year-old Cesar Martinez, of Arvin, died at the scene.
Sheriff's officials say the California Division of Occupational Safety and Health is investigating the incident.