CUMBERLAND
COUNTY
Cumberland
County Average 1996 NATA Modeled Air Concentrations
Compared to Health Benchmarks |
Pollutant |
Modeled
Air Concentration (ug/m3) |
Health
Benchmark (ug/m3) |
Risk
Ratio |
%
Contribution by Source Category |
Point |
Area |
Onroad
Mobile |
Nonroad
Mobile |
Background |
Acetaldehyde |
0.44 |
0.45 |
1 |
0.3% |
25% |
47% |
28% |
0% |
Acrolein |
0.055 |
0.02 |
3 |
4% |
21% |
48% |
27% |
0% |
Acrylonitrile |
0.00069 |
0.015 |
0.05 |
55% |
45% |
0% |
0% |
0% |
Arsenic
compounds |
0.0011 |
0.00023 |
5 |
12% |
88% |
0.04% |
1% |
0% |
Benzene |
1.2 |
0.13 |
9 |
3% |
22% |
26% |
9% |
39% |
Beryllium
compounds |
0.00072 |
0.00042 |
2 |
2% |
98% |
0% |
0.01% |
0% |
1,3-Butadiene |
0.037 |
0.0036 |
10 |
0.4% |
8% |
74% |
18% |
0% |
Cadmium
compounds |
0.00086 |
0.00029 |
3 |
5% |
95% |
0% |
0.1% |
0% |
Carbon
tetrachloride |
0.88 |
0.067 |
13 |
0.00001% |
0.02% |
0% |
0% |
100% |
Chloroform |
0.085 |
0.043 |
2 |
1% |
2% |
0% |
0% |
97% |
Chromium
compounds |
0.0011 |
0.00025 |
4 |
15% |
76% |
3% |
6% |
0% |
Coke
oven emissions |
0 |
0.0016 |
0 |
0% |
0% |
0% |
0% |
0% |
1,3-Dichloropropene |
0.068 |
0.25 |
0.3 |
0% |
100% |
0% |
0% |
0% |
Diesel
particulate matter |
2.5 |
0.5 |
5 |
0% |
0% |
29% |
71% |
*** |
Ethylene
dibromide |
0.0077 |
0.0045 |
2 |
0.0003% |
0.01% |
0% |
0% |
100% |
Ethylene
dichloride |
0.061 |
0.038 |
2 |
0.1% |
0.1% |
0% |
0% |
100% |
Ethylene
oxide |
0.0021 |
0.011 |
0.2 |
1% |
99% |
0% |
0% |
0% |
Formaldehyde |
0.83 |
0.077 |
11 |
0.3% |
17% |
29% |
24% |
30% |
Hexachlorobenzene |
0.000095 |
0.0022 |
0.04 |
0% |
2% |
0% |
0% |
98% |
Hydrazine |
0.000000076 |
0.0002 |
0.0004 |
14% |
86% |
0% |
0% |
0% |
Lead
compounds |
0.0065 |
0.1 |
0.06 |
2% |
83% |
1% |
14% |
0% |
Manganese
compounds |
0.0025 |
0.05 |
0.05 |
9% |
88% |
0.4% |
3% |
0% |
Mercury
compounds |
0.0027 |
0.3 |
0.01 |
1% |
42% |
0.01% |
0.4% |
56% |
Methylene
chloride |
0.32 |
2.1 |
0.2 |
1% |
52% |
0% |
0% |
47% |
Nickel
compounds |
0.0015 |
0.0032 |
0.5 |
33% |
51% |
1% |
14% |
0% |
Perchloroethylene |
0.20 |
0.17 |
1 |
0.05% |
31% |
0% |
0% |
69% |
Polychlorinated
biphenyls |
0.00038 |
0.01 |
0.04 |
0% |
0% |
0% |
0% |
100% |
Polycyclic
organic matter |
0.15 |
0.018 |
8 |
4% |
95% |
0.1% |
0.02% |
0% |
7-PAH |
0.0027 |
0.0051 |
0.5 |
0.005% |
97% |
3% |
0.4% |
0% |
Propylene
dichloride |
0.000023 |
0.053 |
0.0004 |
12% |
87% |
0% |
0% |
0% |
Quinoline |
0.00000034 |
0.00029 |
0.001 |
0% |
100% |
0% |
0% |
0% |
1,1,2,2-Tetrachloroethane |
0.00016 |
0.017 |
0.01 |
16% |
84% |
0% |
0% |
0% |
Trichloroethylene |
0.10 |
0.5 |
0.2 |
0.2% |
22% |
0% |
0% |
79% |
Vinyl
chloride |
0.0083 |
0.11 |
0.07 |
96% |
4% |
0% |
0% |
0% |
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