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CUMBERLAND
COUNTY
| Cumberland 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 |
1 |
0.45 |
2 |
0.9% |
3% |
29% |
17% |
51% |
| Acrolein |
0.05 |
0.020 |
2 |
3% |
19% |
47% |
32% |
0% |
| Arsenic Compounds |
0.0001 |
0.00023 |
0.4 |
66% |
34% |
0% |
0% |
0% |
| Benzene |
0.9 |
0.13 |
7 |
0.7% |
6% |
29% |
20% |
44% |
| Bis(2-ethylhexyl)phthalate |
2 |
0.42 |
4 |
0.0003% |
0% |
0% |
0% |
100% |
| 1,3-Butadiene |
0.07 |
0.033 |
2 |
0.2% |
2% |
34% |
15% |
49% |
| Cadmium Compounds |
0.00004 |
0.00024 |
0.2 |
39% |
61% |
0% |
0.3% |
0% |
| Carbon Tetrachloride |
0.3 |
0.067 |
4 |
0% |
0.1% |
0% |
0% |
100% |
| Chloroform |
0.05 |
0.043 |
1.2 |
0.4% |
21% |
0% |
0% |
78% |
| Chromium (hexavalent form) |
0.00006 |
0.000083 |
0.7 |
7% |
86% |
7% |
0.6% |
0% |
| 1,4-Dichlorobenzene |
0.02 |
0.091 |
0.3 |
2% |
98% |
0% |
0% |
0% |
| 1,3-Dichloropropene |
0.05 |
0.25 |
0.2 |
0.001% |
100% |
0% |
0% |
0% |
| Diesel Particulate Matter |
1 |
0.0033 |
369 |
0% |
0% |
43% |
57% |
* |
| Ethylene Dibromide |
0.02 |
0.0017 |
11 |
0% |
0.001% |
0% |
0% |
100% |
| Ethylene Dichloride |
0.03 |
0.038 |
0.9 |
0.2% |
0.4% |
0% |
0% |
99% |
| Ethylene Oxide |
0.002 |
0.011 |
0.1 |
9% |
91% |
0% |
0% |
0% |
| Formaldehyde |
1 |
0.077 |
14 |
0.8% |
4% |
20% |
11% |
65% |
| Methyl Chloride |
1 |
0.56 |
2 |
0.2% |
0.3% |
0% |
0% |
100% |
| Naphthalene |
0.03 |
0.029 |
0.9 |
4% |
64% |
26% |
6% |
0% |
| Nickel Compounds |
0.0007 |
0.0064 |
0.1 |
59% |
34% |
2% |
4% |
0% |
| Perchloroethylene |
0.1 |
0.17 |
0.7 |
0.004% |
31% |
0% |
0% |
69% |
| 1,1,2,2-Tetrachloroethane |
0.05 |
0.017 |
3 |
0% |
0.2% |
0% |
0% |
100% |
|
Chemicals with risk ratios greater than or equal to 1 are
in bold.
Risk Ratios in italics are based on noncarcinogenic effects.
The seymbol 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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