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