Table 6.

Amounts of Hydrocarbons (ng) and Oxygenated Hydrocarbons (µg) in Lab Blanks and Field Blanks and LODs during Phase 2 Sampling

	Lab Blanks			Field Blanks			LOD
Compound	N	Mean (ng)	SD	N	Mean (ng)	SD	ng	µg/m3
2-Methylpentane	12	0.12	0.10	40	0.12	0.13	0.39	0.05
2-Methylhexane	12	0.07	0.23	40	0.07	0.22	0.66	0.09
3-Methylpentane	12	0.06	0.06	40	0.09	0.17	0.51	0.07
2,3-Dimethylpentane	12	0.02	0.03	40	0.04	0.09	0.27	0.04
2,2,4-Trimethylpentane	12	1.36	0.51	40	2.20	0.95	2.85	0.40
Methylcyclohexane	12	0.40	0.28	40	0.90	1.47	4.41	0.61
1,3-Butadiene	12	0.20	0.13	40	0.26	0.31	0.93	0.13
Benzene	12	0.35	0.26	40	0.37	0.46	1.38	0.19
Toluene	12	0.34	0.20	40	0.33	1.40	4.20	0.58
m&p-Xylenes	12	0.17	0.15	40	0.09	0.08	0.24	0.03
o-Xylene	12	0.14	0.12	40	0.39	0.30	0.90	0.13
Ethylbenzene	12	0.08	0.09	40	0.04	0.07	0.21	0.03
Styrene	12	0.38	0.43	40	0.26	0.45	1.35	0.19
MTBE	12	0.12	0.17	40	0.10	0.14	0.42	0.06
Formaldehyde	25	0.05	0.02	46	0.00	0.01	0.03	0.00
Acetaldehyde	25	0.03	0.02	46	0.01	0.01	0.03	0.00
Acetone	25	0.30	0.16	46	0.05	0.20	0.6	0.08

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