Photos: Con Fire
By Contra Costa County Fire Protection District
On Monday, June 15, 2026, shortly before 11:40 a.m., Contra Costa Fire responded to a hazardous materials alarm at a facility in Concord. Facility personnel reported a fluorine leak alarm had activated inside the building, prompting an immediate evacuation of employees.
The first arriving crews confirmed the building was evacuated, secured the area and initiated hazardous materials operations.
Firefighters developed an entry plan and assembled a hazardous materials team to investigate the source of the leak. Firefighters entered the building wearing specialized protective equipment and conducted air monitoring throughout the facility. Operations were conducted to isolate the leak and safely shut down the affected valve.
Following mitigation efforts, a second entry team conducted additional monitoring throughout the building. Air monitoring confirmed all readings had returned to zero, indicating the leak had been successfully controlled and the atmosphere was safe.
As part of the operation, firefighters completed decontamination procedures before exiting the incident. Decon is the process of removing or neutralizing potentially hazardous substances from personnel and equipment before they leave the operational area. Crews utilized a Tiger Paw decontamination system and paper indicator testing to verify that no contamination remained on personnel or equipment.
No injuries were reported.
See more photos, here.
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