Atlantic 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
0.03%
3%
19%
9%
69%
Acrolein
0.04
0.020
1.8
0.3%
14%
58%
28%
0%
Arsenic Compounds
0.0002
0.00023
0.8
3%
10%
8%
9%
70%
Benzene
1
0.13
9
0.1%
14%
23%
17%
46%
1,3-Butadiene
0.08
0.033
2
0.5%
0.02%
28%
22%
50%
Cadmium Compounds
0.00006
0.00024
0.2
1%
25%
0%
0.04%
74%
Carbon Tetrachloride
0.6
0.067
9
0.00005%
0.05%
0%
0%
100%
Chloroform
0.08
0.043
1.8
0.007%
25%
0%
0%
75%
Chromium (hexavalent form)
0.00003
0.000083
0.3
7%
13%
23%
3%
54%
1,4-Dichlorobenzene
0.07
0.091
0.8
0.03%
39%
0%
0%
61%
1,3-Dichloropropene
0.05
0.25
0.2
0%
100%
0%
0%
0%
Diesel Particulate Matter
0.8
0.0033
239
0%
0%
28%
72%
*
Ethylbenzene
0.2
0.4
0.4
0.4%
6%
60%
34%
0%
Ethylene Oxide
0.007
0.011
0.6
0.02%
13%
0%
0%
87%
Formaldehyde
2
0.077
20
0.2%
2%
11%
6%
81%
Methyl Chloride
1
0.56
2
0.003%
0.2%
0%
0%
100%
Methyl tert-butyl ether
2
3.8
0.4
0.02%
10%
21%
69%
0%
Naphthalene
0.04
0.029
1.5
3%
45%
13%
3%
36%
PAH/POM
0.007
0.0075
0.9
3%
78%
10%
9%
0%
Perchloroethylene
0.1
0.17
0.6
0.3%
34%
0%
0%
66%
1,1,2-Trichloroethane
0.00000033
0.063
5.2E-6
0.05%
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.
