CUMBERLAND
COUNTY
Cumberland County Average 2002 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 |
1 |
0.45 |
3 |
0.01% |
2% |
16% |
10% |
72% |
Acrolein |
0.03 |
0.020 |
1.4 |
0.07% |
16% |
58% |
26% |
0% |
Arsenic Compounds |
0.0004 |
0.00023 |
1.7 |
1% |
6% |
3% |
3% |
87% |
Benzene |
1 |
0.13 |
9 |
0.2% |
27% |
18% |
8% |
47% |
1,3-Butadiene |
0.06 |
0.033 |
1.9 |
1% |
0.03% |
26% |
11% |
62% |
Cadmium Compounds |
0.00006 |
0.00024 |
0.3 |
3% |
30% |
0% |
1% |
66% |
Carbon Tetrachloride |
0.6 |
0.067 |
9 |
0.0002% |
0.05% |
0% |
0% |
99.95% |
Chloroform |
0.07 |
0.043 |
1.6 |
0.06% |
16% |
0% |
0% |
84% |
Chromium (hexavalent form) |
0.0001 |
0.000083 |
1.3 |
4% |
5% |
4% |
1% |
86% |
1,4-Dichlorobenzene |
0.07 |
0.091 |
0.8 |
0.1% |
34% |
0% |
0% |
66% |
1,3-Dichloropropene |
0.04 |
0.25 |
0.2 |
0.0004% |
100% |
0% |
0% |
0% |
Diesel Particulate Matter |
0.9 |
0.0033 |
273 |
0% |
0% |
30% |
70% |
* |
Ethylbenzene |
0.1 |
0.4 |
0.3 |
1% |
7% |
66% |
26% |
0% |
Ethylene Oxide |
0.007 |
0.011 |
0.6 |
1% |
10% |
0% |
0% |
89% |
Formaldehyde |
1 |
0.077 |
19 |
0.1% |
2% |
10% |
5% |
83% |
Methyl Chloride |
1 |
0.56 |
2 |
0.001% |
0.2% |
0% |
0% |
99.8% |
Methyl tert-butyl ether |
0.9 |
3.8 |
0.2 |
0.1% |
14% |
33% |
53% |
0% |
Naphthalene |
0.04 |
0.029 |
1.3 |
1% |
42% |
12% |
3% |
42% |
PAH/POM |
0.007 |
0.0075 |
0.9 |
2% |
84% |
9% |
5% |
0% |
Perchloroethylene |
0.1 |
0.17 |
0.6 |
0.1% |
37% |
0% |
0% |
63% |
1,1,2-Trichloroethane |
0.02 |
0.063 |
0.1 |
0.0004% |
100% |
0% |
0% |
0% |
|
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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