CalMatters | A chemical tank nearly exploded. Did California’s regulators miss the signs?

By Alejandra Reyes-Velarde and Alejandro Lazo

Even as GKN Aerospace worked to resolve environmental compliance notices, regulators and local planners began considering an expansion of the facility that would increase its capacity to manufacture components for military F-35 fighter jets.

The South Coast Air Quality Management District has inspected GKN three times in the last decade. For much of that time, the facility was classified as a “minor source” of emissions within the district’s permitting program, a designation that meant that regulators weren’t required to inspect the facility frequently.

That limited oversight may have contributed to what records show was a yearslong compliance problem.

Those violations did not involve the problematic storage tank that holds methyl methacrylate, regulators said. 

But in 2020, GKN self-reported certain issues that led South Coast air regulators to inspect the facility and review its records. The air district’s investigation found that the company was out of compliance with multiple rules stretching back to 2017. The facility, located within a mile of homes and schools, had failed to maintain required records about its emissions, was operating new equipment without permits and was using equipment that didn’t match the description in its existing permits, according to regulatory reports.

It took until April 2021 for the air district to issue a formal notice of violation, and until late 2024 for the agency to sign a settlement requiring GKN to pay more than $900,000. The company did not admit liability in the settlement, which resolved 14 alleged violations.

The district now treats GKN as a “major source” of emissions – a type of facility that the South Coast air district inspects yearly. A spokesman said that the company has applied for a more comprehensive permit, at the direction of regulators. 

For Tracy La, the timeline told its own infuriating story. 

“That delay and allowing GKN to operate with pretty much impunity has caused so many tens of thousands of residents of Garden Grove to pay for it,” said La, director of VietRISE, a nonprofit that supports Vietnamese and immigrant communities in Orange County. Displaced residents have had to pay for housing, replace medication, seek transportation and rack up other costs associated with evacuating their homes, she added. 

“It’s just frustrating that regular everyday people are constantly having to pay the price for our government officials unwilling to hold these powerful, rich corporations accountable,” La said. 

Garden Grove is a cornerstone of Little Saigon, one of the largest Vietnamese American communities in the United States — a community that includes immigrants and refugees from the Vietnam War.

Some residents know methyl methacrylate not as an aerospace chemical but as a workplace hazard — one they spent years fighting to eliminate.