Early morning fire extinguished at Wacker plant in Charleston, Tennessee

A fire reported at 1:20 a.m. Saturday in the waste water treatment building at the Wacker polysilicon manufacturing plant in Charleston, Tennessee has been extinguished, according to the Bradley County Sheriff's Office.

Spokesman Adam Lewis said the fire on the fourth floor generated a cloud of smoke and water vapor, but air quality tests showed no chemical residue in the air.

"At no time were chemicals involved" or released, Lewis said in a statement.

He said there was no danger to the public.

Lewis said firefighting personnel from

Wacker, Cleveland and Bradley County responded to the incident along with sheriff's office personnel.

Polk County firefighters were on standby, he said in the news release.