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UPDATE: Unknown substance at Cal Poly cleared

Posted at 12:46 PM, Apr 01, 2019

UPDATE (3 p.m.) – Cal Poly officials say an unknown substance found in a parking lot on campus Monday has been determined to be heating hot water from the central plant boiler.

Crews are working to determine the cause of the leak.

All roads are now open and buildings that were closed are expected to be open by 3:30 p.m.


UPDATE (2 p.m.) – Hazmat crews were on scene as of 2 p.m. working to take samples of what fire officials described as some type of hazmat leak.

Firefighters on scene at Cal Poly. (KSBY photo)
Firefighters on scene at Cal Poly. (KSBY photo)


(12:46 p.m.) – Emergency crews were responding to the discovery of an “unknown hazardous substance” at Cal Poly in San Luis Obispo on Monday.

University police said the substance was found in a parking lot between buildings 41a and 41b. Buildings 41, 13 and 7 were evacuated as a precaution.

California Blvd. and N. Perimeter Rd. from University Dr. to California were closed to vehicle and pedestrian traffic.

People were asked to avoid the area.

Monday, April 1 is an academic holiday at Cal Poly. Spring quarter classes are scheduled to begin on Tuesday.

This is a developing story and will be updated with new information as it becomes available.