Table 2.

Elemental composition of particulate matter in exposure groups

Element(μg/m 3 )	Groups
	FA	UFCAPs	UFCAPs + O 3	FCAPs	FCAPs + O 3	O 3
Al	---	bdl	bdl	1.8364	0.8428⋄	---
As	---	0.0020	0.0040	0.0044	0.0077	---
Ba	---	0.0070	0.0047	0.0865	0.0480⋄	---
Ca	---	bdl	bdl	1.1741	0.6475	---
Cd	---	0.0005	0.0005	0.0015	0.0010	---
Co	---	0.0002	0.0002	0.0008	0.0006	---
Cr	---	0.0088	0.0198	0.0129	0.0134	---
Cu	---	0.0119	0.0727Δ	0.1550	0.0537⋄	---
Fe	---	0.0723	0.0848	2.1031	1.0555⋄	---
K	---	0.7448	0.4325	2.6025	1.3867	---
Li	---	bdl	bdl	0.0017	0.0013	---
Mg	---	0.0282	0.0254	0.5585	0.6145	---
Mn	---	0.0048	0.0058	0.0604	0.0348	---
Mo	---	0.0014	0.0032	0.0033	0.0036	---
Na	---	0.1491	0.2550	0.8990	3.7144	---
Ni	---	0.0053	0.0348Δ	0.0079	0.0084	---
P	---	bdl	bdl	0.1278	0.1565	---
Pb	---	0.0128	0.0124	0.0373	0.0271	---
SO4	---	56.4662	39.8730	39.4038	49.3026	---
Sb	---	0.0035	0.0040	0.0146	0.0108	---
Se	---	bdl	bdl	0.0246	0.0248	---
SiO2	---	Bdl	bdl	4.9640	2.8436⋄	---
Sn	---	0.0182	0.0239	0.0151	0.0121	---
Sr	---	0.0016	0.0006	0.0179	0.0101	---
Ti	---	bdl	bdl	0.0691	0.0429	---
V	---	0.0023	0.0052	0.0092	0.0122	---
Zn	---	0.1527	0.0989	0.2171	0.2057	---

bdl - Below Detection Level.

--- Very low PM concentrations, insufficient sample mass for elemental analysis.

Δ Significantly different from UFCAPs.

⋄Significantly different from FCAPs.