Safety Board Reports on Hazardous Ammonia Accident at Virginia Food Processor

The U.S. Chemical Safety and Hazard Investigation Board (CSB) released an update on its investigation into the hazardous ammonia release at a food processing facility in Sterling, Virginia that injured dozens of employees.

The July 31, 2024 incident at Cuisine Solutions, Inc. involved the accidental release of anhydrous ammonia, a hazardous chemical commonly used in refrigeration systems. The incident occurred due to the discharge of an emergency pressure relief valve, which resulted in the release of approximately 170 pounds of anhydrous ammonia, according to company officials.

As the toxic cloud spread through the facility, personnel were evacuated through several exits, some of which were in close proximity to the ammonia release. During the evacuation a number of workers were exposed to the hazardous ammonia which led to symptoms such as difficulty breathing.

Anhydrous ammonia is a toxic substance, and exposure to even small amounts can have significant adverse health impacts,” CSB Chairperson Steve Owens said, “The formation of a toxic ammonia cloud like the one in this incident can pose serious potential risks not just to those in the immediate vicinity, but to the surrounding community as well.”

The CSB’s update also highlights the health risks associated with anhydrous ammonia, given its toxicity. The board said the incident underscores the importance of having effective emergency response and evacuation procedures in place for workers, as well as the need for regular equipment maintenance.

The CSB does not issue citations or fines but makes safety recommendations to companies, industry organizations, labor groups, and regulatory agencies such as OSHA and EPA.