Mount Dora Police and Fire Rescue responded to the Lake Emergency Medical Services (Lake EMS) building at approximately 11:30 a.m. today in reference to a white, powdery substance contained in an envelope.
Upon MDPD's arrival, it was determined that the envelope had arrived via the United States Postal Service.
Twelve employees of Lake EMS, located at 2761 West Old Highway 441, were exposed to the unknown substance, but did not suffer any symptoms and were not transported to the hospital.
Lake County Hazmat Unit conducted an on-site test and it was determined the powder was non-toxic. The FBI and Post Master General were advised of the situation and Lake EMS and Tavares Fire Department assisted with the scene. The substance was sent to an FBI lab for further testing.
The scene was cleared around 1:30 p.m. and all employees have returned to work.