b'Chemical HazardChemical hazards are toxic substances that either occur naturally or are spread to the food during preparation. Common chemical hazards include cleaning supplies or pesticides.ExampleA food market in Texas had to be shut down after health inspectors found an open container of a commercial grade pesticide in the same location where food was being sold to customers.Biological HazardBiological hazards are microscopic germs, invisible to the naked eye, such as parasites, bacteria, and viruses.ExampleThree people contracted E.coli after eating at a Seattle restaurant where a health inspection found that hand washing facilities werent working and proper hand washing procedures werent being followed.15'