Protect yourself – Make sure you are wearing proper PPE. Remember, you can never wear too much PPE!
Stop the source of the spill – If a container or bag tips over, set it upright or position it so that no more material can escape.
Protect others and secure the area – Keep animals and people away from the spill by isolating or barricading the area.
Stay at the site – Do not leave the area. Call for assistance if necessary.
Pesticide Spills: Prevention and Management -- Virginia Cooperative Extension Publications
Pesticide Emergency Resources -- National Pesticide Information Center
Handling Spills -- Pesticide Environmental Stewardship