Spatial Variability and Application of Ratios between BTEX in Two Canadian Cities

Table 1

Mean fall concentration values and standard deviation (in parenthesis) in Windsor and Sarnia (μg/m³).

	Benzene	Toluene	Ethylbenzene	(m + p)-xylene	o-xylene	BTEX
Windsor 3 yrs fall (𝑁=144)	0.79 (0.38)	2.87 (1.92)	0.49 (0.24)	1.54 (0.91)	0.53 (0.31)	6.12 (3.21)
Windsor fall 2005 (𝑁=42)	0.76 (0.14)	2.87 (1.13)	0.47 (0.21)	1.33 (0.76)	0.47 (0.18)	5.89 (1.93)
Sarnia fall 2005 (𝑁=37)	0.98 (0.54)	2.51 (1.31)	0.48 (0.22)	1.28 (0.59)	0.49 (0.24)	5.73 (2.78)