Which situation is an example of chemical contamination of food?
a.A loose hair from an uncovered head landing in a plated dinner salad
b.Raw beef juice dripping from an upper shelf onto a case of lettuce
c.Food stored in a container that once held toxic cleaner, without being cleaned
d.A guest with a milk allergy, served a tomato bisque that was thickened with cream
Explanation
Storing or serving food in a container that held a toxic chemical, or letting cleaner residue reach food, is chemical contamination. A hair is a physical contaminant, raw beef juice dripping onto lettuce is biological cross-contamination, and serving a cream-thickened bisque to a milk-allergic guest is an allergen problem, not a chemical one. Using only food-grade containers and controlling chemicals prevents this hazard.
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