Table 1. Mean ± SD concentrations of BTEX compounds (PPM) in gasoline stations and.

BTEX	Gasoline stations Mean ± SD	Control areas Mean ± SD	ACGIH, 2010 Mean ± SD
Benzene	3.69 ± 1.88	0.05 ± 0.01	0.5
Toluene	120.59 ± 1.17	0.11 ± 0.02	100
Ethyl Benzene	133.70 ± 7.20	0.02 ± 0	100
Xylene	114.35 ± 6.86	0.04 ± 0.01	100

PPM: Part per million