Question: please read given information very well and solve . Suppose a city's water supply has 0.2 ppb of polychlorinated biphenyls (PCBs) in it. Using the

please read given information very well and solve .

Suppose a city's water supply has 0.2 ppb of polychlorinated biphenyls (PCBs) in it. Using the PCB oral potency factor (7.7 kg-d/mg), and the EPA recommended exposure factor (2 L/d, 350 d/y, 30 y, 70 kg); (a) What would be the chronic daily intake? (b) What would be the individual cancer risk for an adult residential customer? (c) In a city of 200,000 people, use this risk assessment to estimate the number of extra cancers per year caused by the PCBs in the water supply. (d) The average cancer death rate in the US is 193 per 100,000 per year. How many cancer deaths would be expected in a city of 200,000? Do you think the incremental cancers caused by PCBs in the drinking water would be detectable

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