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.

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 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.

Biolab says it's continuing to make progress in cleaning up the site at its Conyers facility. A fire broke out at the plant on Sept. 29 sending chemicals like chlorine into the air.