Coolcaesar via Wikimedia Commons

Google employees working in Mountain View buildings that sit on a Superfund site contaminated by previous silicon chip manufacturers do face health risks from the exposure, according to an Environmental Protection Report obtained by the Center for Investigative Reporting.

SocialTimes reported last month that a couple of buildings that make up part of the company’s headquarters had experienced elevated levels of the toxic vapor trichloroethylene, or TCE.

At least 1,000 employees work in the buildings where chemicals levels surged above sanctioned levels. But Google told us at the time that its employees were never in danger.

But according to the Report, TCE levels did pose a potential health threat, particularly for any pregnant employees. The chemical TCE is known to cause birth defects. Prolonged exposure, even at relatively low levels, also boosts the risk of cancer, according to the report.

Google has reiterated to the Center for Investigative Reporting that its employees were never in danger.

On the same day that news of the chemical exposure broke, Google announced that it planned to build a new campus.