In September 2020, a “TCCA reaction and decomposition” caused another plume of hazardous chemicals to be released into the air at the Conyers plant, exposing facility personnel and nine firefighters to “dangerous fumes,” according to a U.S. Chemical Safety and Hazard Investigation Board report. Surrounding businesses were evacuated and a section of I-20 was closed for about six hours.
The report stated another decomposition involving TCCA happened four days later at the plant, but no one was injured.
“TCCA is used throughout the country in pool care and, when put in large bodies of water such as a pool, breaks down slowly, releasing chlorine in the water,” the report added. “However, when TCCA comes into contact with small amounts of water and does not dissolve, it can undergo a chemical reaction that generates heat, causing the decomposition of TCCA, which produces toxic chlorine gas.”
It is not clear if the same chemical was involved in Sunday’s incident.
