Table 1.

Maximum mass concentration (ppm) found for any individual MOUDI impactor stage of As and Pb for field site comparison. Hayden, Port Pirie, and Mount Isa include smelting operations; Sydney, NSW AUS and Tucson, AZ USA represent an urban sample.

	Hayden	Port Pirie	Mount Isa	Sydney	Tucson
As (ppm)	8,622	2,471	895	215	63
Pb (ppm)	13,173	36,399	8,922	148	302