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

Table 5

High- and low-ratio sites in Sarnia and characterization of pollutant mixtures.

Site	T/B	(m + p)/B	O/B	(m + p)/E	Characterization of pollutant mixtures	B:	T:	E:	X
Lows					Industry
Group A
1	1.65	0.58	0.23	2.20	High concentration of benzene from industry leads to low ratios	3.82	6.32	1	3.06
2	1.43	0.58	0.22	1.67		2.88	4.12	1	2.32
3	2.05	0.67	0.28	2.14		3.18	6.52	1	3.02
Mean	1.71	0.61	0.24	2.01		3.30	5.65	1	2.80
Relatively Lows					Background (Open Area)
Group B
34	1.88	0.86	0.37	2.55	Low concentrations and relatively low ratios	2.96	5.56	1	3.63
35	1.92	0.97	0.38	2.72		2.81	5.41	1	3.79
36	1.98	1.03	0.43	2.67		2.59	5.13	1	3.77
37	2.02	1.00	0.40	2.71		2.71	5.47	1	3.78
Mean	1.95	0.96	0.39	2.66		2.77	5.39	1	3.75
Highs					Traffic
Group C
12	4.59	2.33	0.94	2.91	Higher T, E, X concentrations and high ratios	1.25	5.74	1	4.10
21	4.57	2.80	1.10	3.07		1.10	5.00	1	4.27
30	3.98	1.87	0.75	2.80		1.50	5.97	1	3.92
31	4.03	1.96	0.78	2.79		1.42	5.75	1	3.90
Mean	4.29	2.24	0.89	2.90		1.32	5.62	1	4.05