Table 5.

Amounts of Hydrocarbons (ng) and Oxygenated Hydrocarbons (µg) in Lab Blanks and Field Blanks and LODs during Phase 1 Sampling

	Lab Blanks			Field Blanks			LOD
Compound	N	Mean	SD	N	Mean	SD	ng	µg/m3
2-Methylhexane	33	0.05	0.18	49	0.07	0.27	1.59	0.22
2-Methylpentane	33	0.15	0.34	49	0.33	0.73	0.81	0.11
3-Methylpentane	33	0.07	0.23	49	0.12	0.38	1.14	0.16
2,3-Dimethylpentane	33	0.02	0.12	49	0.13	0.53	2.19	0.30
2,2,4-Trimethylpentane	33	0.07	0.16	49	0.19	0.55	0.24	0.03
Methylcyclohexane	33	0	0	49	0.04	0.16	1.65	0.23
1,3-Butadiene	33	0.02	0.1	49	0.01	0.08	0.24	0.03
Benzene	33	1.89	1.99	49	2.29	2.17	6.51	0.90
Toluene	33	1.25	1.79	49	1.33	1.15	3.45	0.48
m&p-Xylenes	33	0.88	2.06	49	0.86	1.24	3.72	0.52
o-Xylene	33	0.11	0.27	49	0.16	0.27	0.81	0.11
Ethylbenzene	33	0.12	0.25	49	0.15	0.20	0.60	0.08
Styrene	33	0.28	0.44	49	0.37	1.00	3.00	0.42
MTBE	33	0.02	0.1	49	0.02	0.09	0.27	0.04
Formaldehyde	34	0.03	0.02	47	0.05	0.06	0.18	0.03
Acetaldehyde	34	0.03	0.01	47	0.03	0.04	0.12	0.02
Acetone	34	0.13	0.07	47	0.12	0.16	0.48	0.07

Note: The LOD for hydrocarbon concentrations was calculated using a flow rate of 10 mL/min and a duration of 12 hours.