OCEAN County Average 2005 NATA Modeled Air Concentrations Compared to Health Benchmarks
Pollutant
Modeled
Air Concentration (ug/m3)
Health
Benchmark (ug/m3)
Risk
Ratio
%
Contribution from
Point Sources
Nonpoint
Sources
On-road
Mobile Sources
Nonroad
Mobile Sources
Background & Secondary
Acetaldehyde
1.5
0.45
3.3
0%
2%
2%
1%
95%*
Acrolein
0.028
0.020
1.4
<1%
15%
7%
6%
72%*
Arsenic Compounds
0.00039
0.00023
1.7
1%
3%
2%
4%
90%
Benzene
0.77
0.13
5.9
<1%
8%
12%
9%
71%
1,3-Butadiene
0.054
0.033
1.6
0%
0%
17%
10%
73%
Cadmium Compounds
0.000057
0.00024
0.2
2%
19%
0%
3%
76%
Carbon Tetrachloride
0.61
0.067
9.1
0%
<1%
0%
0%
100%
Chloroform
0.084
0.043
2
<1%
30%
0%
0%
70%
Chromium (hexavalent form)
0.00011
0.000083
1.3
4%
2%
2%
1%
91%
Cobalt Compounds
7.2E-7
0.00011
0.006
97%
3%
0%
0%
0%
1,4-Dichlorobenzene
0.074
0.091
0.8
0%
38%
0%
0%
62%
1,3-Dichloropropene
0.054
0.25
0.2
0%
100%
0%
0%
0%
Diesel Particulate Matter
0.2
0.0033
62
0%
0%
40%
60%
0%
Ethylbenzene
0.070
0.4
0.2
1%
14%
45%
40%
0%
Ethylene Oxide
0.0074
0.011
0.7
<1%
9%
0%
0%
91%
Formaldehyde
1.6
0.077
21
0%
1%
3%
2%
94%*
Methyl Chloride
1.2
0.56
2.1
0%
<1%
0%
0%
100%
Naphthalene
0.052
0.029
1.8
<1%
42%
13%
3%
42%
Nickel Compounds
0.00048
0.0021
0.2
25%
7%
1%
47%
20%
PAH/POM
0.0087
0.0072**
1.5
0%
93%
2%
5%
0%
Perchloroethylene
0.091
0.17
0.5
<1%
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 based on noncarcinogenic effects are in italics.
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. *Acetaldehyde, acrolein and formaldehyde concentration estimates include secondary formation, which is the process by which chemicals in the air are transformed into other chemicals.
**PAH/POM is "polycyclic aromatic hydrocarbons/polycyclic organic matter." These define a broad class of compounds. The chemicals making up this class were broken up into 8 groups based on toxicity, and each group was assigned a cancer-weighted toxicity estimate. 0.0072 ug/m3 is the health benchmark average across the 8 groups.
