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MIDDLESEX COUNTY

CEP Average Air Toxics Estimates for Middlesex County, NJ in 1990
Contribution by Source Category
Pollutant (HAP) Air Concentration
ug/m3
Health Benchmark
ug/m3
Risk Ratio Point% Area% Mobile% Background%

Acetaldehyde

0.95

0.45

2

10

39

52

----

Acrolein *

0.29

0.02

14

----

61

39

----

Acrylamide

0.0000019

0.00077

0.002

100

----

----

----

Acrylonitrile

0.058

0.015

4

3

97

----

----

Arsenic

0.00056

0.00023

2

40

33

27

----

Benzene

2.9

0.12

24

9

32

42

17

Beryllium

0.000024

0.00042

0.1

53

42

4

----

1,3-Butadiene

0.12

0.0036

34

----

18

82

----

Cadmium

0.00080

0.00029

3

42

58

----

----

Carbon tetrachloride

0.90

0.067

13

----

2

----

98

Chloroform

0.096

0.043

2

5

8

----

87

Chromium

0.0013

0.000083

15

50

34

17

----

p-Dichlorobenzene

0.29

0.091

3

----

100

----

----

1,3-Dichloropropene

0.069

0.027

3

----

100

----

----

Dioxin

0.000000029

0.00000003

1

21

26

1

52

Ethyl acrylate

0.032

2

0.02

4

96

----

----

Ethylene dibromide

0.0077

0.0045

2

----

----

----

100

Ethylene dichloride

0.21

0.038

6

0.003

71

----

29

Ethylene oxide

0.014

0.01

1.4

60

40

----

----

Formaldehyde

1.5

0.077

19

2

29

52

17

Hydrazine

0.00032

0.0002

1.6

----

----

----

----

Lead *

0.0090

0.1

0.1

15

64

21

----

Manganese *

0.0065

0.05

0.1

13

71

17

----

Mercury compounds *

0.0026

0.3

0.01

8

34

2

57

Methyl chloride

1.3

0.56

2

0.4

1

----

96

Methylene chloride

0.43

2

0.2

19

46

----

35

Methylene diphenyl diisocyanate *

0.00035

0.6

0.001

100

----

----

----

Naphthalene *

0.16

14

0.01

2

25

73

----

Nickel

0.019

0.0042

4

59

34

6

----

Polycyclic organic matter

0.32

0.0059

55

18

35

47

----

Propylene dichloride

0.0048

0.053

0.1

1

99

----

----

Quinoline

0

0.00029

0

----

----

----

----

Styrene

0.19

1.8

0.1

1

79

19

----

1,1,2,2-Tetrachloroethane

0.0000087

0.017

0.0005

100

----

----

----

Tetrachloroethylene

0.62

0.071

9

8

69

----

22

1,1,2-Trichloroethane

0.00035

0.063

0.01

12

88

----

----

Trichloroethylene

0.48

0.1

5

18

65

----

17

Vinyl chloride

0.098

0.012

8

----

100

----

----

Vinylidene chloride

0.0000067

0.02

0.0003

100

----

----

----

back to 1990 county-level estimates

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