Factor 2 (named mixed industrial) in PM10 showed high loadings of Cu, Zn, Br, S and Ca, and it explained about 13% of total variance. This was the only PM10 factor positively correlated with Pb. High contributions of Zn and Cu were assigned to metallurgical industries and to diesel powered vehicles. Zn was present in tire wear dust as well as in tailpipe emissions due to its use in motor oil, and Cu was present in brake wear dust (Lopez et al., 2011). This factor was likely a mixture of coarse emission of industrial and