CSB Says Yenkin-Majestic Has Not Addressed Five Columbus Plant Safety Recommendations

The U.S. Chemical Safety and Hazard Investigation Board (CSB) reports that Yenkin-Majestic/OPC Polymers has not implemented, or substantively responded to, five safety recommendations stemming from a fatal April 2021 explosion and fire at the company’s resin plant in Columbus, Ohio. The CSB issued the recommendations in November 2023 as part of its final investigation report and says it has received no response despite repeated efforts to communicate with the company. Its initial transmission was a letter dated December 4, 2023, addressed to Andrew O. Smith, then the company’s President and CEO. Smith became Executive Chairman of OPC Polymers LLC in early 2023, according to the source.

The incident caused one employee’s death from burns and smoke inhalation. Eight others were taken to area hospitals with injuries from the explosion, fire, and building collapse, including third-degree burns and limb fractures; one employee required a leg amputation after being crushed beneath debris. The CSB determined that a reactor manway cover installed on an operating kettle was not properly designed, constructed, or tested, and that the company failed to follow basic pressure-vessel integrity quality-assurance practices. Pressurized flammable naphtha solvent vapors and resin liquid escaped through the manway seal, creating a vapor cloud that ignited.

The CSB also identified emergency preparedness and worker-protection deficiencies. It found that the facility lacked an adequate emergency preparedness plan and that emergency training was deficient. Employees did not receive adequate evacuation notice because audible and visual alarms were lacking, and the company did not require flame-resistant uniforms to protect employees from fire hazards. The five recommendations were intended to address these issues and help prevent similar incidents. The source also reports that the company pleaded guilty to federal criminal charges in September 2026; the supplied material does not provide further details about the plea or the charges.

For government buyers, primes, and industrial contractors, the update is a risk signal rather than a procurement announcement. It identifies no solicitation, contract award, funding opportunity, or new mandatory contractor requirement. Still, procurement and supplier-management teams evaluating the company—or relying on industrial suppliers with comparable process-safety exposure—can consider the reported incident, the CSB’s finding that recommendations remain unaddressed, and the reported guilty plea as inputs to due diligence and operational-risk reviews. These facts do not by themselves establish an eligibility decision or a specific contractual consequence; they support careful, documented assessment of safety performance and responsiveness to investigation findings.

• The CSB says Yenkin-Majestic/OPC Polymers has not substantively responded to or implemented five recommendations issued after its investigation.
• The recommendations followed a fatal April 2021 explosion and fire at the company’s Columbus, Ohio resin plant; they were issued in November 2023.
• The CSB’s initial recommendation letter was dated December 4, 2023, and addressed to then-President and CEO Andrew O. Smith.
• The incident killed one employee and injured eight others; reported injuries included third-degree burns, limb fractures, and an amputation.
• The CSB identified an inadequately designed, constructed, or tested reactor manway cover and deficient pressure-vessel integrity quality assurance as causal factors.
• Investigators described a release of pressurized naphtha solvent vapors and resin liquid, formation of a flammable vapor cloud, and subsequent ignition.
• The source identifies additional concerns involving emergency planning, training, evacuation alarms, and flame-resistant work clothing.
• The company’s September 2026 federal guilty plea is reported, but the supplied source does not specify the charges or plea details.
• Procurement teams can document the findings in supplier due diligence and operational-risk reviews; the update creates no stated new procurement requirement, solicitation, or award.