I've been researching this since, I have family in SoCal and I never even knew that there was a nuclear meltdown outside of LA let alone, it releasing toxic ash from this fire!
There's all types of chemicals that were burnt up during the Woolsey Fire and this 1 article says that they've found elevated Radon at the site (which kills almost as many people per year as cig smoking).
Here's another link with some history on the meltdown that happened and subsequent cover-up. Its from the 1970's I think and the style of dress is amazing.
I just can't believe they never cleaned any of this up and in LA of all places.