A faulty alarm sensor on a chlorine gas canister prompted the evacuation of a four-story UCLA engineering building Monday, forcing hundreds of people outside while a hazardous-materials team investigated the trouble.
Alarms connected to the one-liter chlorine tank went off about 10:20 a.m., signaling a possible leak. The sensors automatically alerted campus safety officials, and the Los Angeles City Fire Department’s hazardous-materials unit was called in, said Bill Andrews, a spokesman for the UCLA school of engineering and applied science.
About 200 students and teachers were evacuated from the engineering building, located in the center of the Westwood campus. No one was injured.