After getting connected with their comm techs a couple days ago, PG&E finally came out today (58 days after I opened my original ticket). And to give them credit, their crew was very knowledgeable and personable once I was finally able to get someone out here.
 
They managed to get access to the suspect pole, and just came back by after their noise hunting expedition to tell me they agree with me- it is that pole. One of the guys could even hear it arcing while he was standing underneath it.
 
They’re going to have a crew come out and “rebuild” what’s on that pole. No ETA, but at least we’re on a path to resolution.
 
This effort plausibly prevented a fire, property damage, or someone getting hurt. Also, I am not crazy! (Or at least not about RFI.)