1. Many were found to be selling baby formula tainted with the industrial chemical melamine.
2. The development suggested radioactive contamination may be worse than first thought, with tainted groundwater the most likely consequence.
3. The decision came two days after South Korea said it will temporarily suspend imports of Japanese food if feared to be tainted with radiation.
4. Legal measures should be taken if the purchase of uniforms is tainted with corruption.
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5. The pork was found to be tainted with " colorings " made of sodium borate, bean flour and other additives.