Ocean 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
0.006%
2%
23%
9%
66%
Acrolein
0.04
0.020
2
0.05%
11%
64%
25%
0%
Arsenic Compounds
0.0004
0.00023
1.7
1%
3%
4%
4%
88%
Benzene
1
0.13
8
0.04%
8%
27%
14%
51%
1,3-Butadiene
0.07
0.033
2
0.1%
0.1%
28%
16%
56%
Cadmium Compounds
0.00005
0.00024
0.2
2%
20%
0%
0.03%
78%
Carbon Tetrachloride
0.6
0.067
9
0.00001%
0.05%
0%
0%
99.9%
Chloroform
0.08
0.043
1.9
0.06%
30%
0%
0%
70%
Chromium (hexavalent form)
0.0001
0.000083
1.3
1%
3%
5%
1%
90%
1,4-Dichlorobenzene
0.07
0.091
0.8
0.008%
38%
0%
0%
62%
1,3-Dichloropropene
0.05
0.25
0.2
0.00003%
100%
0%
0%
0%
Diesel Particulate Matter
1
0.0033
299
0%
0%
29%
71%
*
Ethylbenzene
0.2
0.4
0.4
0.2%
6%
64%
30%
0%
Ethylene Oxide
0.007
0.011
0.7
0.05%
9%
0%
0%
91%
Formaldehyde
2
0.077
20
0.02%
2%
13%
5%
80%
Methyl Chloride
1
0.56
2
0.0007%
0.2%
0%
0%
99.8%
Methyl tert-butyl ether
1
3.8
0.4
0.02%
8%
26%
66%
0%
Naphthalene
0.05
0.029
1.7
1%
43%
11%
2%
43%
PAH/POM
0.009
0.0075
1.2
1%
87%
7%
5%
0%
Perchloroethylene
0.09
0.17
0.5
0.05%
28%
0%
0%
72%
1,1,2-Trichloroethane
3.4E-7
0.063
5.4E-6
8%
92%
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.
