UNION
COUNTY
Union County Average 1999 NATA Modeled Air Concentrations Compared to Health Benchmarks |
Pollutant |
Modeled
Air Concentration (ug/m3) |
Health
Benchmark (ug/m3) |
Risk
Ratio |
%
Contribution from |
Major Sources |
Area
Sources |
On-road
Mobile Sources |
Nonroad
Mobile Sources |
Background |
Acetaldehyde |
2 |
0.45 |
5 |
2% |
5% |
59% |
13% |
21% |
Acrolein |
0.2 |
0.020 |
12 |
0.09% |
23% |
48% |
29% |
0% |
Arsenic Compounds |
0.0001 |
0.00023 |
0.4 |
6% |
94% |
0% |
0% |
0% |
Benzene |
2 |
0.13 |
16 |
0.5% |
10% |
53% |
14% |
22% |
Bis(2-ethylhexyl)phthalate |
2 |
0.42 |
4 |
0.2% |
0.05% |
0% |
0% |
100% |
1,3-Butadiene |
0.2 |
0.033 |
6 |
0.05% |
4% |
41% |
20% |
35% |
Cadmium Compounds |
0.00008 |
0.00024 |
0.3 |
14% |
85% |
0% |
0.9% |
0% |
Carbon Tetrachloride |
0.3 |
0.067 |
4 |
0.01% |
0.5% |
0% |
0% |
99% |
Chloroform |
0.1 |
0.043 |
3 |
0.3% |
67% |
0% |
0% |
33% |
Chromium (hexavalent form) |
0.0001 |
0.000083 |
1.5 |
21% |
64% |
14% |
0.5% |
0% |
1,4-Dichlorobenzene |
0.09 |
0.091 |
1 |
4% |
96% |
0% |
0% |
0% |
1,3-Dichloropropene |
0.2 |
0.25 |
0.7 |
0% |
100% |
0% |
0% |
0% |
Diesel Particulate Matter |
2 |
0.0033 |
664 |
0% |
0% |
39% |
61% |
* |
Ethylene Dibromide |
0.03 |
0.0017 |
19 |
0.07% |
0.02% |
0% |
0% |
100% |
Ethylene Dichloride |
0.05 |
0.038 |
1.2 |
1% |
0.3% |
0% |
0% |
99% |
Ethylene Oxide |
0.007 |
0.011 |
0.6 |
16% |
84% |
0% |
0% |
0% |
Formaldehyde |
3 |
0.077 |
34 |
2% |
4% |
39% |
22% |
34% |
Methyl Chloride |
1 |
0.56 |
2 |
0.04% |
1% |
0% |
0% |
99% |
Naphthalene |
0.1 |
0.029 |
5 |
2% |
69% |
19% |
10% |
0% |
Nickel Compounds |
0.002 |
0.0064 |
0.3 |
3% |
93% |
3% |
0.5% |
0% |
Perchloroethylene |
0.3 |
0.17 |
1.9 |
0.6% |
58% |
0% |
0% |
41% |
1,1,2,2-Tetrachloroethane |
0.07 |
0.017 |
4 |
0.2% |
0.7% |
0% |
0% |
99% |
|
Chemicals with risk ratios greater than or equal to 1 are
in bold.
Risk Ratios in italics are based on noncarcinogenic effects.
The symbol ug/m3 is micrograms per cubic meter,
the amount (in micrograms) of a chemical in a cubic
meter of air. This is also known as a concentration.
* For diesel particulate matter, onroad and nonroad
concentrations include a model-estimated background
concentration. |
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