California schools are extremely competitive and that goes for their post-bacc programs. If you have a 3.0, I wouldn't recommend the California public post-bacc programs, you might have better luck with the private post-bacc programs.
What did you receive as a writing score? I know a lot of programs care more about the writing and verbal scores (since grad students in the program are expected to be good writers and my program cared about it) so that might be food for thought.