Table 5.

Spearman’s Correlation coefficients for the compounds studied.

Gas station A	Pollutant	Benzene	Toluene	Ethyl benzene	M, p-Xylene	O-xylene
	Benzene	1.000
	Toluene	0.337	1.000
	Ethyl benzene	0.495	0.95*	1.000
	M, p-xylene	0.426	0.483	0.700*	1.000
	O-xylene	0.495	0.8*	0.850*	0.65	1.000
Gas station B	Benzene	1.000
	Toluene	− 0.18	1.000
	Ethyl benzene	− 0.138	0.717*	1.000
	M, p-xylene	0.203	0.410	0.669*	1.000
	O-xylene	0.046	0.350	0.7*	0.929*	1.000
Gas station C	Benzene	1.000
	Toluene	− 0.303	1.000
	Ethyl benzene	0.303	− 0.119	1.000
	M, p-xylene	0.376	0.238	0.748*	1.000
	O-xylene	0.667	− 0.71	0.714*	0.833*	1.000

*Correlation is significant at the 0.05 level.