I don't know the regs but every station around gets dug up every couple years or so.I understand it’s Kalifornistan, but seriously!!???
Kindly show us the written regulation that says gasoline/diesel dispensing stations must dig up and replace their tanks every couple of years.
Because it’s sooooo inexpensive to safely remove said tanks and install new ones. Not!
Then again, after 2030, who cares?