Cape May 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
0.007%
2%
9%
14%
75%
Acrolein
0.02
0.020
1
0.08%
15%
45%
40%
0%
Arsenic Compounds
0.0004
0.00023
1.6
1%
2%
2%
4%
91%
Benzene
0.9
0.13
7
0.4%
10%
13%
16%
61%
1,3-Butadiene
0.06
0.033
1.8
0.2%
0.2%
15%
20%
65%
Cadmium Compounds
0.00005
0.00024
0.2
1%
14%
0%
1%
84%
Carbon Tetrachloride
0.6
0.0679
9
0.00001%
0.03%
0%
0%
100%
Chloroform
0.06
0.043
1.4
0.001%
9%
0%
0%
91%
Chromium (hexavalent form)
0.0001
0.000083
1.2
1%
1%
3%
1%
94%
1,4-Dichlorobenzene
0.06
0.091
0.6
0.003%
24%
0%
0%
76%
1,3-Dichloropropene
0.03
0.25
0.1
0%
100%
0%
0%
0%
Diesel Particulate Matter
0.7
0.0033
209
0%
0%
24%
76%
*
Ethylbenzene
0.1
0.4
0.3
3%
6%
38%
53%
0%
Ethylene Oxide
0.006
0.011
0.5
0.02%
6%
0%
0%
94%
Formaldehyde
1
0.077
18
0.02%
2%
5%
6%
87%
Methyl Chloride
1
0.56
2
0.0006%
0.1%
0%
0%
99%
Methyl tert-butyl ether
1
3.8
0.3
0.00002%
8%
14%
78%
0%
Naphthalene
0.03
0.029
0.9
3%
43%
9%
4%
41%
PAH/POM
0.008
0.0075
1
1%
89%
4%
6%
0%
Perchloroethylene
0.8
0.17
0.5
0.05%
22%
0%
0%
78%
1,1,2-Trichloroethane
0.009
0.063
0.1
0%
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.
