If there is a toxic spill or exposure, proceed immediately to an area where you are no longer exposed. Call 911. Provide the building's address, your floor and phone number, and also what type of spill has occurred. Take appropriate action to contain the hazard; close doors behind you, and always follow all safety procedures when working with toxic materials.
For more information regarding Toxic Hazards, please visit the following links:
http://www.princegeorgescountymd.gov/Government/AgencyIndex/DER/waste.asp