If I were you, I would call the electrician who performed the work or their company, and the inspection dept that came out and inspected the work and passed it. And tell them what the PG&E told you, and let them deal with it. The electrician and the inspector should know what is required of them. Keeping in mind I am not an electrician just what I would do.
I would also, repost this in the Electrical forum right here, we got the best electrical guys you will ever find, right here.