Table 3:

Selected sources of trace elements ubiquitous in the built environment. Data are from Pacyna & Pacyna, 2001; Leung & Jiao, 2006; Nriagu & Pacyna, 1988; Gardner and Carey 2004; Hjortenkrans 2007.

Anthropogenic Source	Chemical Cocktails of Trace Elements
Gasoline combustion	Pb, Mn
Coal* and oil combustion (power plants)	V, Ni, Cr, Pb, Mn, Zn, Cu, As, Mo, Sb, Ti, Hg*, Cd, Se*, Mo*
Refuse incineration**	Pb, Zn, Cr, Mn, Cu, As, Ni, Hg, Sb, Sn, V, Se, Cd
Municipal wastewater treatment	Mn, Ni, Zn, Cr, Cu, As, Pb, Cd
Sewage sludge	B, Cr, Pb, As, Zn, Sb, Sn
Motor oil	V, Zn, Cr, Cu, Pb, Ni, and Mo
Vehicular and industrial discharge	Zn, Pb, As, Cr, Cu
Vehicle brake and tire wear	Cd, Cu, Zn, Pb, Sb, Ni, Zn
Leakage from pipes	Sr, Se
Corrosion of metal objects	Mn, V, Co, Mo
Atmospheric deposition	Pb, Zn, Cu, Ni, As, Mn, Cr, V

^*denote trace elements produced by coal combustion, not in significant quantities via oil combustion.

^**denote refuse incineration is highly variable and dependent on the composition of the original refuse (listed elements are those seen on average).