BBAuthors: Ichu, Bright Chigozie; Advisor: -; Participants: Opara, Alexander Iheanyichukwu; Ejike, Emmanuel Nnamdi; Nkwoada, Amarachi Udoka; Ibe, Francis Chizoruo; Dioha, Emmanuel Chuka (2021)
Results of the study showed that Zn concentration levels were not significant at all the sampling points, while the concentrations of Pb particulate matter which ranged from 0.11 to 0.91 µg/m3 exceeded the international revised EPA Pb standard of 0.15 µg/m3 but within the approved Federal Ministry of Environment (FMEnv) Nigeria, 24 h long duration of 1 µg/m3, and National Ambient Air Quality Standard (NAAQS) 1 h duration (1 µg/m3). The enrichment factor (EF) showed that Pb had a dominant crustal source, while Zn was determined to be of minor to moderate crust enrichment. The multivariate analysis carried out using principal component analysis (PCA) based on varimax rotation and Hierar... 
