The CSB's report details a chemical reaction and fire at a BioLab warehouse that led to shelter-in-place orders.

The U.S. Chemical Safety and Hazard Investigation Board has released an update on its investigation into the BioLab fire, the September 29 inferno that engulfed a BioLab industrial building, shrouding neighborhoods in chemical smoke for days and forcing thousands of Georgia residents to shelter in place in each night or evacuate altogether.

It was a chemical reaction that sparked the massive fire and toxic smoke plume at a lab in Georgia that threatened nearby communities and metropolitan Atlanta in September, according to the findings released by the U.

The U.S. Chemical Safety and Hazard Investigation Board released an update into the investigation of the chemical reaction and toxic gas release that caused a massive fire at the Bio-Lab facility in Conyers on Sept.