They’re not being grown next to the Superfund site. They’re being grown IN the Superfund site!
We grow our own garlic. Have been very pleased with this company:
http://gourmetgarlicgardens.com/
The garlic itself came from http://www.foreveryongfarms.com/
It takes almost no space to grow. And the difference in taste between the gourmet varieties and what you get at the store, even the California grown stuff, is just amazing.