Table 7.

CDC biomonitoring data for benzene in blood (ng/L).

	Sample size	50th percentile
Ages 20–59 years*	1345	27
Smokers†	316	110
Non-smokers†	874	<LOD (24)
Blood benzene concentration corresponding to self-reported exposure in NHANES database‡
Second-hand smoke	721	50
No second-hand smoke	740	17
Pumped gasoline	715	29
Did not pump gasoline	747	25
Breathe diesel exhaust	133	39
Did not breathe diesel exhaust	1327	27

*CDC (2009).

†Kirman et al. (2012).

‡http://www.cdc.gov/nchs/nhanes/nhanes_questionnaires.htm/