Sorry, there are currently and have been numerous "upgrade" projects in California. Shell Martinez a few years ago added a new unit with a DCU, Chevron El Segundo, Arco/BP, Exxon/Tesoro Benica, Exxon/Mobil (Torrance and many others have all had upgrades such as debottlenecking and mechanical upgrades. Most upgrades have been for increased production at existing facilities.
Here's an Idea for them, Try DRILLING for oil. CA have huge reserves but no one wants to see those ugly drill rigs pumping $$'s into state cofers.