The recommended threshold limit value (TLV-ACGIH) air concentration for occupational exposure to water-insoluble hexavalent chromium Cr (VI) is 0.01 mg/M3. This concentration assumes that the individual is generally healthy and is exposed for 8 hours per day 5 days per week (40 hour work week) over a working lifetime (that is from age 18 to 65 years). Assuming a body weight of 75 kg and an inhalation rate of 0.85 m3/h over the working life of the individual, a. What is the lifetime (75 y) CDI? b. Estimate the low-dose cancer risk from occupational inhalation exposure to hexavalent chromium Cr(VI).
The recommended threshold limit value (TLV-ACGIH) air concentration for occupational exposure to water-insoluble hexavalent chromium Cr (VI) is 0.01 mg/M3. This concentration assumes that the individual is generally healthy and is exposed for 8 hours per day 5 days per week (40 hour work week) over a working lifetime (that is from age 18 to 65 years). Assuming a body weight of 75 kg and an inhalation rate of 0.85 m3/h over the working life of the individual,
a. What is the lifetime (75 y) CDI?
b. Estimate the low-dose cancer risk from occupational inhalation exposure to hexavalent chromium Cr(VI).
(a) The drinking water of the town watsford contains the USEPA with low levels of benzone bento,(pyrene and arsenic),while level are safe by USEPA standard a risk assessment was performed to determine if there is an risk of developing cancer for a resident of watsfound.The CDI of each pollutant and total risk were calculated for a female resident with a life expectancy of 75years and an average weight of 65.4 kg six exposure pathway were used involving exposure during drinking,swimming and showering the total risk was calculated to be xxx and the CDI and the risk associated with yyy was the height of the three contaminates the calculation required several assumption involving the physical details and daily action of the subject during the calculation it was required to account for all realistic pathways and variables.Calculation cannot fit each person individually.
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