. Author manuscript; available in PMC: 2020 Jun 1.

Published in final edited form as: J Air Waste Manag Assoc. 2019 Apr 22;69(6):778–788. doi: 10.1080/10962247.2019.1587553

Table 6.

Spearman correlation coefficients (%) between VOCs and nitrogenous species, ozone, and PM from Logan, Utah based on 12-hr samples (6 a.m.–6 p.m. and 6 p.m.–6 a.m.; n = 54).^a

VOC	NO₂	NO	NO_x	NO_y	NO_z	O₃	PM₁₀	PM_2.5	PM_10-2.5
Benzene	87	81	99	94	79	−79	84	84	78
Toluene	77	76	82	81	70	−70	72	74	62
Ethylbenzene	78	70	84	85	72	−71	78	80	68
m,p-Xylene	87	81	93	92	72	−80	79	79	76
o-Xylene	69	58	72	69	52	−60	56	56	57
Methyl chloride	9^b	12^b	8^b	11^b	20^b	−3^b	10^b	12^b	9^b

Notes. ^aAll correlations without a superscript letter are significantly different from 0 (1% level).

Not statistically significantly different from 0 (10% level).