Table 8.

Comparison of Summary Statistics for Yard, Dock, and Shop Samples

	Yard Upwind				Dock				Shop
Compound (µg/m3)	Obser- vations (N)	Mean	Median	SD	Obser- vations (N)	Mean	Median	SD	Obser- vations (N)	Mean	Median	SD
Trimethylpentane	432	0.71	0.43	0.79	64	0.87	0.53	0.99	19	2.57	1.04	4.50
Dimethylpentane	432	0.38	0.24	0.47	64	0.54	0.31	0.51	19	2.21	0.95	3.09
2-Methylhexane	432	0.64	0.42	0.95	64	0.90	0.59	0.88	19	3.98	0.82	7.13
Methylpentane	432	1.60	1.04	2.28	64	2.34	1.33	2.47	19	7.42	2.56	13.26
3-Methylhexane	432	0.76	0.48	1.28	64	1.04	0.72	1.08	19	4.91	1.06	8.73
Methylcyclohexane	432	0.46	0.27	0.68	64	0.63	0.36	0.91	19	1.77	0.65	2.97
Hexane	161	1.70	1.01	1.86	44	3.05	1.59	4.13	15	2.49	1.58	2.35
1,3-Butadiene	432	0.20	0.12	0.45	64	0.75	0.60	0.57	19	0.30	0.24	0.28
Benzene	432	1.24	1.01	0.87	64	1.54	1.15	1.26	19	1.14	0.90	0.92
Ethylbenzene	432	0.56	0.40	0.53	64	1.03	0.71	0.92	19	7.28	2.33	8.87
m&p-Xylenes	432	1.85	1.36	1.69	64	2.85	1.98	2.54	19	23.01	8.50	26.89
o-Xylene	432	0.66	0.46	0.63	64	0.90	0.64	0.74	19	8.44	2.50	10.71
Styrene	432	0.26	0.15	0.36	64	0.74	0.51	0.62	19	0.60	0.49	0.56
Toluene	432	3.67	2.77	3.43	64	10.54	7.08	11.20	18	5.56	3.78	4.75
MTBE	432	0.27	0.01	0.53	64	0.29	0.04	0.66	19	0.62	0.03	1.65
Acetone	345	2.62	1.75	3.07	65	9.44	4.93	17.55	17	19.19	12.09	14.98
Acetaldehyde	345	2.42	2.06	2.45	65	6.27	4.84	4.27	17	45.00	3.64	100.51
Formaldehyde	345	3.33	3.22	1.75	65	25.44	18.96	19.03	17	13.72	5.05	16.63
EC	432	0.83	0.57	0.77	67	1.12	0.94	0.74	15	1.75	1.26	1.14
OC	432	4.93	4.15	6.60	67	7.93	7.55	2.75	15	7.87	6.97	3.27
PM2.5	427	11.67	9.30	14.63	66	13.88	10.87	8.22	15	19.58	18.43	7.97