Comment by hangonhn

That stuff is all over Silicon Valley. Santa Clara County actually has one of the most if not the most EPA superfund sites. It's the leftover legacy of chip manufacturing. When you rent in the Bay Area, the landlord does not have to disclose TCE contamination to you. TCE can cause birth defects and low birth weight in weeks if breathed in by pregnant women. If you're renting in the Bay Area, Google the address and make sure the property is not over a TCE contamination area.