Sinister past of military jet giant behind ticking timebomb toxic chemical plant

The military aerospace giant at the enter of a looming toxic chemical disaster in Southern California previously paid nearly $910,000 to settle environmental violations tied to the same facility where officials fear an overheated tank could explode as early as Monday morning.

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GKN Aerospace — a major supplier of jet engines, landing gear and aircraft components for commercial and military planes — reached the settlement with the South Coast Air Quality Management District in January 2025 over permit violations, missing emissions records and nitrogen oxide issues connected to its Garden Grove plant.

The revelations resurfaced as emergency crews raced against time Sunday to contain a failing storage tank holding roughly 7,000 gallons of methyl methacrylate, a highly toxic and flammable chemical used in plastics manufacturing.

Officials warned the tank could reach a critical threshold temperature of 140F around 10 a.m. Monday — a point where the chemical may begin producing heat faster than firefighters can cool it, dramatically increasing the risk of a catastrophic rupture, toxic vapor release or explosion.

The crisis began Thursday morning when the chemical tank started overheating and venting vapors at the aerospace manufacturing facility.

By Friday, Orange County fire officials said the situation had worsened after a malfunction involving the tank’s pressure-release valve prevented crews from stopping the dangerous reaction.

Evacuation orders rapidly expanded throughout six Orange County cities — Garden Grove, Anaheim, Buena Park, Cypress, Stanton and Westminster — displacing an estimated 40,000 to 50,000 residents.

As conditions inside the tank deteriorated Saturday, California Gov. Gavin Newsom declared a state of emergency to unlock additional state resources and shelter locations.

Emergency officials described the incident as an extremely dangerous “thermal runaway” event, where the chemical generates its own uncontrollable heat inside the pressurized tank.

Under the current response plan, hazmat teams are continuing to monitor temperatures while cooling the container. Officials have acknowledged there is a point where crews may be forced to pull back entirely, leaving the tank to either rupture or explode.

Gov. Gavin Newsom later declared a state of emergency as the evacuation perimeter swelled to nearly 10 square miles, with some reports estimating as many as 79,000 people were forced from their homes amid fears the distressed tank could erupt into a toxic fireball or release dangerous chemical fumes across densely populated neighborhoods.

“This is a very dangerous situation,” Garden Grove Mayor Stephanie Klopfenstein said Saturday while urging residents still ignoring evacuation orders to leave immediately.

According to the South Coast AQMD, inspectors uncovered multiple violations during a November 2020 inspection at the GKN facility, including absent records involving volatile organic compound emissions and permitting problems.

Public records showed the facility used materials containing hexavalent chromium — a known carcinogen made infamous by the Erin Brockovich contamination case — along with coatings containing toxic air contaminants. Regulators also alleged the plant exceeded facility-wide volatile organic compound emission limits and failed to perform required analyzer tests measuring nitrogen oxide emissions from combustion equipment.

The agency later requested additional operational records and ultimately issued a notice of violation in April 2021.

Regulators said they continued working with GKN in the years afterward to address the permitting concerns and obtain additional documentation.

In March 2025, regulators issued two additional notices to comply requiring the company to produce operating records and submit applications involving equipment registration and ownership changes connected to the facility, according to public records.

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As part of the settlement agreement, GKN ultimately paid an estimated civil penalty of nearly $900,000, according to the South Coast AQMD.

The California Division of Occupational Safety and Health has now also opened an investigation into the ongoing chemical emergency.

GKN’s Garden Grove site has operated since 1993 and employs roughly 540 workers. The facility manufactures cockpit windshields, jet canopies and specialized aviation windows for both civilian and military aircraft, including bullet-resistant glass products.

As evacuation zones expanded, entire neighborhoods across northern Orange County appeared deserted, with police barricades sealing off shopping centers and residential streets. Thousands of displaced residents scrambled to locate hotel rooms or emergency shelter space while carrying pets, luggage and essential belongings out of the danger zone

Trina Nguyen, 26, who lives two blocks from the plant, said finding accommodation became nearly impossible as hotels quickly filled.

“The evacuation has been absolutely terrible because when trying to get a hotel it’s extremely hard,” she said.

“Half the time, none of the hotels will pick up the phone or will leave you on hold for hours on end. A lot of hotels aren’t in the area and so aren’t aware of the situation.”

Nguyen said the crisis raised broader concerns about hazardous industrial sites operating near homes, schools and retirement communities.

“This situation raises more awareness for me of industrial complexes in such high dense areas, especially with a mix of homes and families and schools,” she said.

“There’s three schools in that area and retirement homes too. That’s a terrible place to put anything especially with that type of chemical.”

Another evacuee, Ricardo Munoz, 23, described the unfolding emergency as terrifying.

“It’s in your backyard, it’s in your neighborhood,” he said of the chemical plant. “I don’t understand why they would allow it.”

“It’s part of the industrialization of California that has been going on for years.”

GKN Aerospace did not immediately respond to questions about the prior settlement as the chemical emergency escalated over the weekend.

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