Low levels of dioxins are emitted from a hazardous waste inc

Low levels of dioxins are emitted from a hazardous waste incinerator that results in annual average ambient air concentrations, measured as 2, 3, 7, 8-TCDD. of 0.2 pg/m^3 in the adjacent community of 80.000 residents. The slope factor for 2, 3, 7, 8-TCDD is 1.5 times 10^5 (mg/kg d)^-1 What is the incremental lifetime risk from the dioxin exposure to the average adult residing in the community for 35 years? (PE Exam Question) 1.2 times 10^-7 2.5 times 10^-7 4.4 times 10^-6 What is the incremental lifetime risk from the dioxin exposure to a child living in the community from birth to age 6 yr? (PE Exam Question) 3.6 times 10^-9 2.2 times 10^-8 2.5 times 10^-7 2.1 times 10^-6

Solution

6. (c) 4.4 * 10^6

7. (a) 3.6 * 10-7

Characterizing risks from dioxin and related compounds requires the integration of complex data sets and the use of science-based inferences regarding hazard, mode of action, dose response, and exposure.