Burlington 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
2
0.45
4
0.07%
3%
41%
8%
48%
Acrolein
0.08
0.020
4
0.2%
10%
71%
19%
0%
Arsenic Compounds
0.0005
0.00023
2
2%
8%
7%
6%
77%
Benzene
1
0.131
11
1%
13%
37%
11%
38%
1,3-Butadiene
0.1
0.033
3
1%
0.06%
36%
16%
47%
Cadmium Compounds
0.00008
0.00024
0.3
8%
34%
0%
1%
57%
Carbon Tetrachloride
0.6
0.067
9
0.0008%
0.1%
0%
0%
99%
Chloroform
0.1
0.043
3
0.3%
49%
0%
0%
51%
Chromium (hexavalent form)
0.0002
0.000083
2
38%
6%
6%
1%
49%
1,4-Dichlorobenzene
0.08
0.091
0.9
2%
40%
0%
0%
58%
1,3-Dichloropropene
0.06
0.25
0.2
0.0006%
100%
0%
0%
0%
Diesel Particulate Matter
2
0.0033
465
0%
0%
30%
70%
*
Ethylbenzene
0.3
0.4
0.8
1%
6%
68%
25%
0%
Ethylene Oxide
0.008
0.011
0.8
2%
16%
0%
0%
82%
Formaldehyde
2
0.077
25
0.3%
3%
23%
10%
64%
Methyl Chloride
1
0.56
2
0.003%
0.4%
0%
0%
99.6%
Methyl tert-butyl ether
2
3.8
0.5
1%
13%
42%
44%
0%
Naphthalene
0.07
0.029
2
3%
38%
19%
4%
36%
PAH/POM
0.01
0.0075
1.6
4%
77%
13%
7%
0%
Perchloroethylene
0.1
0.17
0.7
1%
41%
0%
0%
58%
1,1,2-Trichloroethane
0.0006
0.063
0.01
0.009%
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.
