"Firefighters Responded to a Hazardous Materials Leak at Exfluor Research Corp."

Exfluor does not have a track record of maintaining leaks. At one leak, they didn't even call 911 themselves. Instead, the responding teams found the Exfluor staff "working to contain the release of the material, perfluorosuccinoyl fluoride."

According to exfluor.com, perfluorosuccinoyl fluoride is considered an irritant and highly toxic by inhalation, if swallowed or if coming in contact with skin.

The Round Rock Fire Department Hazardous Materials Team and the Williamson County Hazardous Materials Team both responded to the incident. Officials from the Texas Commission on Environmental Quality also responded. Air around the building will be monitored periodically while remediation takes place, which is expected to occur this afternoon and evening. Remediation is the company’s responsibility.