Recent Updates

• The phase of work scheduled for this period was completed successfully.

• Following the storage of samples, the removed material is being disposed of in accordance with local, state, and federal rules.

• Air monitoring data continues to show no elevated MMA readings in the community, and all data is within typical levels.

Arcwood Environmental, one of GKN Aerospace’s environmental response partners, issued the following press release on its successfully completed activities involving our Garden Grove facility.

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Arcwood Environmental Completes Response Effort at GKN Aerospace's Garden Grove Facility

Working alongside GKN Aerospace, regulators and local stakeholders, Arcwood led environmental response efforts

INDIANAPOLIS, July 16, 2026 — Arcwood Environmental (Arcwood), working alongside GKN Aerospace, regulatory agencies and local stakeholders, has completed key environmental response activities at GKN Aerospace's Garden Grove, California facility. As GKN Aerospace's environmental response partner, Arcwood provided the specialized expertise required to safely manage hazardous materials, reduce risk and support the facility's path forward, while maintaining a strong focus on protecting workers, the surrounding community and the environment.

The work included the safe removal, transportation, treatment and disposal of neutralized methyl methacrylate (MMA) from two unaffected storage tanks at the facility. Throughout the response, Arcwood worked in close coordination with GKN Aerospace and partners to support a safe, compliant, and carefully managed removal and preservation effort.

"When unforeseen events occur, our customers need expertise they can trust," said Carol Roos, Chief Communications and Sustainability Officer at Arcwood Environmental. "Supporting our customers means bringing the technical experience needed to manage hazardous materials safely and thoroughly, while keeping the people and communities affected at the center of every decision."

"We are grateful for Arcwood for their dedicated work in helping us safely complete this phase of our reset. We are looking forward to continuing the facility's 60-year legacy of manufacturing the world's most advanced aircraft windows here in Garden Grove," said Steve Carlin, Senior Vice President at GKN Aerospace.

Media Contact: [email protected]

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About Arcwood Environmental

Arcwood Environmental minimizes the impact of waste to clear the way for a better future. Backed by decades of experience, Arcwood partners with Fortune 500 companies and local enterprises across industries — including pharmaceutical, chemical, advanced manufacturing, oil and gas, and steel — to tackle the world's most pressing industrial waste challenges. Arcwood's comprehensive, agile, and scalable solutions span the entire waste management hierarchy, from prevention and recycling to treatment and disposal. Arcwood's customizable solutions are designed to keep operations running smoothly while supporting compliance and sustainability goals.  

www.arcwoodenviro.com

• The phase of cleanup scheduled for this period progressed successfully and is scheduled to continue next week. This current phase includes removing any final neutralized MMA from the “non-incident” tanks (Tanks #2 and #4) and cleaning those tanks.

• The material removed this week was disposed of in accordance with local, state, and federal rules, with a small amount retained for future testing.

• Air monitoring data continues to show no elevated readings, and all data is within typical levels.

• Removal of neutralized MMA material from Tanks #2 and #4 (the “non-incident” tanks) progressed successfully and as planned this week. The material was disposed of in accordance with local, state, and federal rules, with a small amount retained for future sampling.

• The next phase of cleanup, including removal of any remaining neutralized MMA in Tanks #2 and #4 and cleaning of Tanks #2 and #4, will begin on July 6.

• Air monitoring data continues to show no elevated readings, and all data is within typical levels.

GKN is coordinating with Unified Command to facilitate the planned removal of neutralized MMA from two storage tanks at the facility during the period commencing Monday, June 29, and ending on Thursday, July 2. This removal will be carried out safely and over multiple days. Dr. Darwin Cheng, Director of Environmental Health (OCHCA), confirmed to the Garden Grove City Council on June 23 that there is no danger to the community during the MMA removal process.

• The vast majority of the Garden Grove facility was unaffected by the incident. The area housing the tanks is a small corner of the plant and is currently cordoned off. It is in this area that a thorough analysis of the incident is ongoing and where site response and recovery work is continuing.  
• Most GKN employees work in unaffected operations in other parts of the plant. Their work includes forming, lamination, machining, and assembly, and does not require them to go near the tanks or the ongoing review. Select employees have now returned to the plant to conduct safety checks and machine calibrations at this unaffected portion of the facility.  
• GKN continues to work closely with other regulators and authorities, including the U.S. EPA and Cal OSHA, regarding the affected portion of the facility. Work is underway to clean up this area, including draining MMA from tanks that were not involved in the incident, while preserving all relevant materials.  
• Air monitoring continues 24/7 at the fenceline and shows no elevated readings. In the surrounding community, both daily sampling and stationary monitoring continue at designated locations.
• All the measures we’ve put in place with the support and cooperation of our regulators and other authorities confirm that the facility, our employees, and residents remain safe.  
• Dr. Darwin Cheng, Director of Environmental Health (OCHCA), confirmed to the Garden Grove City Council on June 23 that there is no danger to the community during the MMA removal process.
• GKN will continue to provide updates to the community as work progresses.

GKN Aerospace Announces Community Support Initiatives

Includes funding to Orange County United Way’s OC Community Resilience Fund to provide short-term assistance as well as commitment to support broader community initiatives

GARDEN GROVE, Calif., June 3, 2026 - GKN Aerospace announced it has funded $3 million to Orange County United Way’s OC Community Resilience Fund to provide assistance to those affected by the recent evacuation of areas surrounding GKN’s Garden Grove facility. The company is also committing an additional $1 million to support broader community initiatives across Orange County. GKN earlier funded $1 million to the American Red Cross to support residents directly impacted by evacuation orders when those orders were in effect.

“By working with a trusted local organization with the infrastructure to mobilize resources quickly, we hope to help expedite assistance to those most in need,” said GKN Senior Vice President Steve Carlin, who oversees the Garden Grove site’s programs. “We will continue to engage with community leaders, work with the authorities, and help the community move forward.”

The OC Community Resilience Fund provides coordinated recovery support for those affected by the incident. By calling 2-1-1 Orange County, a service of Orange County United Way, residents can be connected with local health and human service resources and information about available aid. The fund uses established screening and vulnerability assessment processes to help prioritize assistance.

GKN remains grateful to the emergency responders, public officials, technical specialists, nonprofit organizations, and regulatory agencies that collaborated in the response effort.

Site response and recovery work is continuing under the oversight of the Orange County Health Care Agency (OCHCA) as the County’s Certified Unified Program Agency (CUPA), and through the Unified Command, the coordinated incident-management structure for the response, which includes the OCHCA, South Coast Air Quality Management District, and GKN.

Residents can find the latest site status information at the Orange County Health Care Agency’s website. Additional information is available at www.gkngg.com.

Media Contact: [email protected]