Table 1

Concentrations of benzene (µg/m3) in environmental air and in breath

VariableExposure categorynNo. <LOQ% <LOQMinLower quartileMedianUpper quartileMax
LOQ, limit of quantitation.
Benzene in airHigh114006.175.72528646630
Moderate38001.44.07.432.51850
Low14010.7<1.02.23.14.861.3
Benzene in breath, pre-exposureHigh1111917.1<1.52.64.68.230.4
Moderate4436.8<1.53.75.89.325.2
Low1512315.2<1.52.94.77.4104
Benzene in breath, end of exposureHigh107002.38.413.729.2365
Benzene in breath, post-exposureHigh11421.8<1.56.511.424.4153
Moderate4137.3<1.53.69.020.358.1
Low143117.7<1.53.14.67.849.9