BioLab is a company that makes pool and spa treatments, and the chemicals involved in that process appeared to exacerbate the fire and send up huge smoke clouds. The fire later reignited around noon, according to authorities, and was put out around 3:30-4 p.m. on Sunday.

ROCKDALE COUNTY, Ga. - The BioLab fire in Conyers has reportedly been controlled and put out after reigniting Sunday afternoon. Officials say the roof and several walls in the lab have collapsed. Rockdale County Fire Chief Marian McDaniel says the giant plume of smoke residents may still see is the result of a chemical reaction.

FOX 5 Atlanta met up with residents who were evacuated after a fire broke out at the BioLab in Conyers. Yahoo Sports

BioLab back in 2004 was owned by Chemtura, a conglomerate that went into bankruptcy and was later acquired by a German company called Lanxess. BioLab is now owned by KIK Consumer Products, according to its website, in a sale from Chemtura a few years before that Chemtura was acquired by Lanxess.