The Santa Susanna Field Lab had at least one nuclear reactor (built without containment) blow up. They also dumped toxic chemicals and waste often. In the hills between LA and Ventura counties.

Story was buried for decades. Lots of folks in Simi Valley have died of cancer.

- https://en.wikipedia.org/wiki/Santa_Susana_Field_Laboratory

- https://parentsagainstssfl.com/