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OCFA details May hazmat response after tank leak that prompted mass evacuations
Summary
The Orange County Fire Authority described a May 21 hazardous-materials incident at an aerospace facility that led to expanded evacuations affecting roughly 50,000 residents; OCFA said mitigation reduced risk and county agencies have taken lead on cleanup.
The Orange County Fire Authority told the Stanton City Council that a May 21 tank leak at an aerospace manufacturing site in nearby Garden Grove required one of the county’s largest evacuation responses in recent memory.
OCFA representatives said engine and medic crews were first on scene and identified three tanks leaking a highly volatile, toxic and flammable substance. Early cooling and mitigation work allowed responders to reduce pressure in a secondary tank, the agency said, but a primary tank still contained an estimated 6,000 to 7,000 gallons and could not be safely offloaded because of deteriorating conditions and malfunctioning valves.
“As conditions deteriorated and we discovered a crack that suggested pressure relief, we expanded evacuations to protect public safety,” the OCFA representative said during the council meeting.
OCFA said unified command with local police isolated the scene, deployed master streams to cool tanks, and over several operational periods monitored tank pressures and removed portions of exterior shell and insulation to improve cooling. Evacuation orders remained in effect until May 26; cleanup oversight and product removal transitioned to the Orange County Healthcare Agency on May 29.
Why it matters: City officials told residents the incident affected evacuation, sheltering and local businesses and that multiple agencies have been coordinating recovery. One council member said the evacuation and response demonstrated the scale of the county’s emergency operations for a hazardous-materials release.
At the meeting, Stanton’s fire chief and city manager noted the city is compiling and sharing recovery and public-health guidance on the city website and will continue to push information from unified command to residents.
Public response and next steps: A resident at the council meeting asked for a community update and pressed the council to inspect other local businesses that handle hazardous materials and address dust and air-quality problems near industrial sites. Mayor David John Shaver said the city asked its battalion chief to review inspection records and hazardous-materials permitting to ensure facilities conform to state and local standards; city manager Hannah Pador offered to meet with the resident to review specific concerns.
OCFA recommended continued community awareness and shared summer safety messaging. County agencies remain the lead for the cleanup and removal effort, and Stanton staff said they will continue to post updates and links to agency guidance on stantonca.gov.
