For dioxins in fathead minnows the BCF = 29,200 and the half-life for elimination of dioxins from is 14.5 days. For an aquatic habitat where the dioxin concentration of 0.015 ppt, what is the concentration of dioxin in fathead minnows? If a minnow is taken from the contaminated habitat and placed in a clean laboratory water tank, how many days will it take for the dioxin concentration in the minnow to drop to 0.10 ppb?

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