There's a lot more that feels "off" about San fran. The monsters in the tanker for instance make no sense. Neither does that guy which lost his slpeen or liver or whatever it was...
If I'm remembering things correctly, it was the Enclave that put the FEV in the tanker, in order to stop sabotagers from taking the boat, and what's wrong with what's-his-face losing a liver? People always place stupid bets in fiction.