SM, you or the plumber will have to call 811 for the gas line(and other utilities) to be marked out if there is any digging to be done. The markout is done for free. Here in DE they have three business days to complete the markouts.
Once everything is marked out, take pictures of where all the lines are for future reference.
I hope a plumber can repair the leak—that it is at a joint that is accessible—without digging.
That would be the ideal resolution.
It will be a battle for PG&E to accept any responsibility for the gas line itself. A photograph showing the original meter location at the back house would be your strongest evidence.
As I recall, the old location is obvious as all get out. The re-routing piping is there where the gas line comes out of the ground, then a gap filling pipe that PG&E installed to connect that pipe to the house.
I have an appointment in a couple of hours this morning with a plumber and will take some photos of the original location. I'm wondering how the plumber will be able to locate the leak now that PG&E has shut off the gas (and put a seal on the valve) at the meter. Sniffer's can't work then.
I'm fit to be tied, again.
This morning, promptly at 8AM my phone rang. It was PG&E's auto dialer with a perky robot voice calling, waking me up on a holiday, to inquire how pleased I was with their technician's visit yesterday. I hung up. I was just going back to sleep when the phone rang again at 8:15AM. . . PG&E calling back, same perky ROBO VOICE calling back, apparently to make sure I was REALLY AWAKE! AAAARRRRGGGGGHHHHH!!!!!
Question #2: "Did our technician leave your equipment in a safe and working condition? Please press one for YES or press 2 for NO."
2222222222222222!!!!!!!
Unfortunately, there was no question: "Are you pleased that our system woke you twice after a short fitful night of sleep with inane questions about a service call in which we made erroneous assumptions about our prior work? Please press one for 'Are You Kidding me' or press two for 'Hell NO!' or press three for '@#$* YOU and the horse you rode in on, too!'". . . but there should have been!