Airshed Planning Professionals (Pty) Ltd were originally appointed to assist Ferret Mining and Environmental Services Pty (Ld) in assessing the potential human health risks associated with the proposed Trekkopje Uranium Mining operation near Swakopmund. Subsequent to the original assessment (Burger and Le Roux, 2006), modifications to the originally proposed mining process resulted in different particulate emission rates, and subsequently different air pollution concentrations and particulate fallout rates.