There's even a TCE site where Facebook used to be headquartered (between California Ave and Page Mill Road), where Stanford now has a faculty housing development. The university has stated that they built the homes with protection against TCE leakage/accumulation, but I've read that TCE can easily permeate PVC pipes that are often used for water distribution.

My family decided not to live in this development (or in the nearby neighborhood) because of the risks of TCE contamination. But who knows what risks there are in the area we decided to live, which is right next to SLAC!