Table 1.

Summary statistics – 24-hour and 1-hour chemical concentrations.

CHEMICALS (UNIT)	24-Hr					1-Hr					ND
	MIN (ppbv)	MAX (ppbv)	MEDIAN (ppbv)	MEAN (ppbv)	SD (ppbv)	MIN (ppbv)	MAX (ppbv)	MEDIAN (ppbv)	MEAN (ppbv)	SD (ppbv)
Benzene	0.6	592	0.89	18.53	83.75	2.94	2900.2	5	87.39	402.58	39
Toluene/methylbenzene	0.34	276	2.55	19.45	48.77	1.67	1352.12	11.57	78.17	217.4	3
Ethylbenzene	0.2	113	0.53	4.42	16.03	0.98	553.58	5.59	36.22	102.51	23
Xylene, m&p	0.25	221	1.68	15.69	43.1	1.22	1082.67	9.17	72.63	205.76	7
Xylene, o-	0.2	39.4	0.85	3.19	6.7	0.98	193.02	6.13	19.51	36.2	15
Trimethylbenzene, 1,3,5-	0.2	9.95	0.59	1.43	2.12	0.98	48.74	6.5	11.6	12.39	25
Trimethylbenzene, 1,2,4-	0.2	60.4	0.4	3.45	10.79	0.98	295.6	5.78	35.03	75.72	27
Styrene/Vinylbenzene	0.2	43.4	0.37	1.91	6.22	0.98	212.62	4.23	17.56	43.4	26
Dichlorobenzene, 1,4-	0.2	4.43	0.3	0.55	0.66	0.98	21.7	2.2	2.73	1.27	45
Trichlorobenzene, 1,2,4-	0.28	13.5	0.67	1.12	1.93	1.37	66.14	3.52	10.9	22.4	10
Trimethyl benzene	0.3	366	1.4	15.18	58.39	1.47	1793.03	5.78	35.03	75.72	46
Ethylmethyl benzene	0.3	42.8	1.4	3.15	6.74	1.47	209.68	120.1	131.86	72.78	47
1-Propynyl benzene	0.3	7.2	1.4	1.74	1.13	35.29	166.67	100.98	100.98	92.89	47
Propyl benzene	0.3	23.5	1.4	2.08	3.16	1.47	115.13	115.2	115.2	NA	48
Diethyl benzene	0.3	93.4	1.4	4.14	13.56	1.47	457.57	312.5	312.5	NA	48
Methyl-methylethyl benzene/methylcumene	0.3	84.7	1.4	3.31	11.65	1.47	414.94	414.94	414.94	205.55	48
Tetramethyl benzene	0.3	36.4	1.4	2.76	5.69	1.47	178.32	144.85	144.85	47.49	48
1-Methyl propenylbenzene	0.3	51	1.4	2.63	6.96	1.47	249.85	250	250	NA	49
2-Methyl propenylbenzene	0.3	95.9	1.4	3.53	13.2	1.47	469.81	469.81	469.81	NA	49