(Reuters) - A California aerospace factory operated by GKN Aerospace plans to restart some production, sources and a county health agency said, after halting output in late May when an overheating tank raised fears of an explosion and prompted 50,000 nearby residents to evacuate.
Employees began returning to the facility this week to conduct safety checks "as the plant begins first steps needed to restart some operations in parts of the facility that were unaffected by the incident," according to a source and an online notice, from the Orange County Health Care Agency.
The work would include machining and assembling transparent materials used for cockpit windows and canopies that would not involve the manufacturing of acrylic, the notice said. A spokesperson for GKN, owned by UK-based Melrose PLC, was not immediately available for comment.
Multiple agencies, including the U.S. federal government and Orange County District Attorney Todd Spitzer, have launched investigations into the factory, while California's Occupational Safety and Health division is inspecting it.
In late May, an overheating chemical tank at the California facility triggered an emergency response and evacuation orders. A thermal issue was identified in a tank holding methyl methacrylate, a chemical used to manufacture plastics and resins.
Officials had warned that the tank could rupture, spilling up to 7,000 gallons (26,500 litres) of toxic material. Firefighters later said the tank was no longer at risk.
The plant, which has around 500 employees, had been expanding as both the commercial aerospace and defense sectors ramped up output of the windows. Saint-Gobain and Boeing were not immediately reachable for comment. A PPG spokesperson said it is aware of the incident, and is monitoring the situation.