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    Concentration of Lead in Soil from Mine Tailings

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    Lead from mine tailings containing 0.6 % lead was applied at a rate of 12 metric tons per acre of soil and worked in to a depth of 20 cm. The density of the soil is 1.8 g/cm3. To what extent does this add to the burden of lead in the soil? (There are 640 acres per square mile and 1609 meters in a mile.)

    a) 19 ppb
    b) 45 ppb
    c) 19 ppm
    d) 49 ppm

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    Solution Summary

    The concentration of lead in soil after mine tailings are worked into the ground is calculated from mass, area and soil depth data.