In a general sense, "contaminated" can be defined as a state of being wherein something has been rendered unfit for use by the introduction of undesirable elements. Similarly, "decontaminated" is then a state of being wherein something has been cleansed of contamination and restored to usefulness. These definitions relate to limiting conditions, and they obviously include intermediate conditions of partial contamination/decontamination determined by the amounts of residual undesirable elements present.

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