Table 1. Ambient VOCs concentrations (µg/m³) measured at the three monitoring sites in Paterson and one background site in Chester.

VOC Compounds	N	Avg	SD	Min	Med	Max	MDL	>MDL(%)	ND(%)
1,1,1,-Trichloroethanea	209	0.15	0.09	0.05	0.11	0.98	0.02	99	0
1,2,4-Trimethylbenzenea	209	0.54	0.59	0.01	0.39	4.38	0.02	89	9
1,3,5-Trimethylbenzenea	209	0.17	0.17	0.01	0.15	1.23	0.02	85	12
1,3-Butadienea	209	0.15	0.18	0.01	0.11	1.35	0.01	84	14
Acetonitrilea	209	0.53	0.83	0.08	0.20	6.54	0.17	52	44
Acetylenea	209	1.15	1.24	0.02	0.77	8.22	0.03	100	0
Acroleina	209	0.79	0.74	0.11	0.62	3.86	0.25	76	20
Benezenea	209	1.13	0.89	0.22	0.90	6.52	0.02	100	0
Carbon Disulfide	209	0.72	1.46	0.01	0.09	16.0	0.03	73	27
Carbon Tetrachloridea	209	0.61	0.18	0.06	0.57	1.07	0.06	100	0
Chloroethane	209	0.04	0.06	0.01	0.03	0.58	0.02	59	34
Chloroforma	209	0.19	0.21	0.01	0.15	1.52	0.02	75	22
Chloromethanea	209	1.15	0.19	0.56	1.16	1.78	0.03	100	0
Dichlorodifluoromethanea	209	2.89	0.64	1.19	2.83	7.59	0.03	100	0
Dichloromethanea	209	0.91	1.17	0.03	0.56	7.18	0.06	98	1
Dichlorotetrafluoroethane	209	0.12	0.03	0.07	0.14	0.14	0.02	100	0
Ethylbenzenea	209	0.57	0.84	0.04	0.35	9.04	0.02	100	0
Methyl Ethyl Ketonea	209	1.88	2.07	0.07	1.18	14.0	0.13	91	8
Methyl Isobutyl Ketonea	209	0.37	0.48	0.01	0.25	3.57	0.03	78	21
Methyl tert-Butyl Ethera	209	0.45	1.09	<0.01	0.14	7.93	0.01	68	32
Propylenea	209	1.05	0.96	0.12	0.86	6.90	0.02	100	0
Styrenea	209	0.16	0.16	0.02	0.13	0.98	0.04	77	13
Tetrachloroethylenea	209	0.48	0.56	0.04	0.34	5.10	0.08	82	7
Toluenea	209	5.27	5.83	0.19	3.62	32.4	0.02	100	0
Trichloroethylenea	209	0.10	0.14	0.03	0.03	1.46	0.05	36	54
Trichlorofluoromethanea	209	2.02	1.19	0.68	1.69	11.2	0.04	100	0
Trichlorotrifluoroethanea	209	0.79	0.17	0.38	0.77	1.61	0.09	100	0
m,p-Xylenea	209	1.77	3.67	0.04	0.91	40.9	0.04	100	0
n-Octanea	209	0.20	0.20	0.01	0.14	1.50	0.03	85	13
o-Xylenea	209	0.56	0.72	0.01	0.39	6.65	0.02	97	1
p-Dichlorobenzenea , b	195	0.24	0.23	0.02	0.18	1.39	0.04	75	23

^aThese VOCs were selected for the PMF analysis based on S/N ratio >2 and detection >50% in pooled Paterson data.

^bHigh concentrations (N = 14) monitored at the commercial site in the period of 9/26/2006∼12/17/2006 were excluded.