Note that if you Unitrunk these SDG&E talkgroups on the RCS, they almost always have one radio ID. Meaning you're hearing the SDG&E 900 MHz Motorola Smartnet system being patched over. Give the 900 MHz system a listen and see if you can figure out which talkgroup is being patched over: https://www.radioreference.com/apps/db/?sid=1895