Hi Andy. Wanted to bring this thread to the top of the pile.
I'm in SoCal too (10b) & just scored a huge free haul today. It came looking like fire starter logs which surprised me because I was expecting to have to shovel it into containers to drag to my pickup. Have you learned any new info since this posted?
I've read it's high in salt & shouldn't be used to start seeds so just mix in & top dress my established beds, I guess. At that price I'll figure it out. 😂