Kaiser said four of its patients reported finding glass in their soup Feb. 10. No one reported feeling any ill effects.
FoodService Partners said the glass came from a container that broke during the soup preparation. The Maryland-based company said the cook tried to just clean out the kettle rather than reporting the incident and dumping out the soup.
It said the cook has been suspended and will be retrained.
FoodService Partners has notified all its customers that received the soup, but it declined to identify them.
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Information from: San Francisco Chronicle, http://www.sfgate.com/chronicle