The role of toxicity testing in identifying toxic substances

In this case, guideline values are described as the concentration in drinking water associated with an estimated upper-bound excess lifetime cancer risk of 10-4, 10-5, or 10-6 (i.e. one additional cancer per 10,000/100,000/1,000,000 of the population ingesting drinking water containing the toxicant at the guideline value for 70 years) . ................
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