Table 2.

Mean atmospheric concentrations of benzene, toluene, and xylenes (BTX) (mg m⁻³) for exposed individuals (n = 60)

Chemicals	GM	Arithmetic mean	Median	Minimum	Maximum	SD	Variance	CV
Benzene∗	0.8	0.79	0.77	0.06	1.25	0.268	0.072	0.34
Toluene†	1.4	1.47	1.43	0.53	3.09	0.521	0.271	0.35
Xylene‡	2.8	3	2.98	1	6.69	1.26	1.58	0.42

CV, coefficient of variation; GM, geometric mean; SD, standard deviation; TLV, threshold limit value.

^∗TLV = 1.6 mg m⁻³.

^†TLV = 75 mg m⁻³.

^‡TLV = 434 mg m⁻³.