Baron,
Heh heh you are a stickler! However, she does make a citation to a LA times article in that document. Granted the article doesn't mention all 84 hospitals and does not specifically link the closure to illegal immigrants. Instead, it talks about Hawthone hospital and cites lack of insured clients and the nurse to patient requirements as the primary reasons of closing down.
Considering that 60% of the un-insured in this part of the country are illegals, it is logical to assume that this is probably the main problem.
The reasons you mentioned such as Competition with larger hospitals, getting annexed, or the state closing them down are definitely not the cause, well at least in the case of Hawthorne hospital.
I also saw an article produced by the California Medical Association which also recognizes this crisis, it shows how much money hospitals in the state are losing due to patients that cannot pay. Its quite alarming. I might be able to dredge that article up if you want to see it.
Here is a fox news article on the subject:
http://www.foxnews.com/story/0,2933,150750,00.html
You may not view fox news as credible either, but taken into account how many illegal immigrants there are in California and the fact that none of them have medical insurance, and also the fact that uninsured patients are causing serious financial problems for medical institutions, it is logical to assume that they are correct or at least close to correct with the statements in that article.