Research
Between-airport heterogeneity in air toxics emissions associated with individual cancer risk thresholds and population risks
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* Corresponding author: Ying Zhou ying.zhou@emory.edu
1 Department of Environmental and Occupational Health, Rollins School of Public Health, Emory University, 1518 Clifton Road NE, Atlanta, Georgia 30322, USA
2 Department of Environmental Health, Harvard School of Public Health, Landmark Center 4th Floor West, PO Box 15677, Boston, Massachusetts, 02215, USA
Environmental Health 2009, 8:22 doi:10.1186/1476-069X-8-22
Published: 8 May 2009Additional files
Additional file 1:
Relative emission profiles by hour of day and day of week for three template airports. The plots in this file show the relative emission profile by hour of day as well as day of week for ATL, ORD and PVD. Note that all emissions are relative to the maximum value by hour of day or day of week, which is assigned a value of 1.0.
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Additional file 2:
Distribution of independent variables and summary statistics at 32 airports. The data in this table summarize the values of the independent variables at the 32 airports under study.
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Additional file 3:
Increase in maximum individual cancer risk and total population cancer risk within 50 km of the airport from benzene for a 1 metric ton/year increase in emissions at each airport. This figure demonstrates the generally weak association between the population risk increase and maximum individual risk increase per unit increase in benzene emissions.
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Additional file 4:
Benzene de minimis individual risk emission threshold with a natural logarithm transformation vs. distance between the nearest census block centroid and the airport centroid. This figure shows the log-transformed benzene DMIRET increases approximately linearly with distance.
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Additional file 5:
Benzene intake fractions vs. population within 50 km of airports. This figure shows how benzene intake fraction increases approximately linearly with population within 50 km from airports.
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