I believe that Cal/OSHA will still require masks indoors unless everyone inside is vaccinated.

Edit: "Indoors, fully vaccinated workers without COVID-19 symptoms do not need to wear face coverings in a room where everyone else is fully vaccinated and not showing symptoms. However, where there is a mixture of vaccinated and unvaccinated persons in a room, all workers will continue to be required to wear a face covering."

https://www.dir.ca.gov/DIRNews/2021/2021-58.html