PFAS has been detected in household and defence site dust samples in previous studies. However, little attention has been paid to assessing worker exposure on PFAS impacted sites and/or high PFAS risk workplaces such as fire stations and hangars. Preliminary modelling suggests that over a typical 8-hour workday, a 78 kg human exposed to dust disturbed on a PFAS impacted site could exceed the current Australian PFOS TDI under a very specific set of circumstances. The modelled data shows that the risk posed by PFOA and PFOS in the contaminated land environment (undisturbed) is minimal, however a moderate risk is present in highly contaminated, highly disturbed scenarios such as source zone remediation activities. Further, activities such as industrial processes and firefighting present a high-risk scenario where PFAS residues may remain on surfaces and be disturbed by workers. A study of PFAS in inhalable dust using a developed in-house novel methodology was undertaken to demonstrate background levels of PFAS as a percentage of TDI. This data was then used to establish a baseline PFAS exposure in inhalable dust to determine background PFAS in workplace inhalable dust.