I don't see any new frequencies authorized in the FCC database. Are you referring to the SRRCS? If so, those frequencies should be on this site somewhere. If they're on the SRRCS, they'd have a talkgroup. I haven't heard them on their VHF frequency for a while now.
I have not monitored Rancho Murieta. Recently a site was added there for the SRRCS, so it would make great sense that they are now using TGs on that system. I'd suggest listening in open mode to find them.