The Santa Susana Lab is just north of Lost Hills, an unincorporated community boasting Sylvester Stallone, the Kardashians, and numerous other celebrities. Bell Canyon, just to the west, is also home to many other celebrities.
The Santa Susana Lab still exists, but has largely been disassembled since the Apollo and Space Shuttle programs. Numerous leaks from the test reactors on the site have polluted groundwater in and around Simi Valley.
The Rocketdyne engine tests shown in the episode were regular occurrences at the Santa Susana Lab from the 1960s through the 1980s.