Results of Soil Sampling conducted at Vista Field show levels of per- and polyfluoroalkyl substances (PFAs) are extremely low and below state cleanup levels, with exception on one sample. 

The Port was informed in June 2025 that soil samples collected by a property owner from a utility trench at its property contained low concentrations of PFAS. The Port then took steps to initiate additional sampling from that property, to determine the validity of the initial sampling results, and from the larger Vista Field area.  The Port hired Landau Associates to evaluate the presence of PFAS at Vista Field utilizing a sampling methodology that meets Ecology standards.

In August 2025, 47 soil samples were collected and analyzed, and results show limited presence of PFAS at Vista Field, with exception on one sample. This means that after a written report of the soil investigation is completed, sent to and evaluated by Washington Department of Ecology, there should be no PFAS-related reason that construction and development of Vista Field can’t proceed on track. 

The Port had conducted a Phase 1 Environmental Assessment at Vista Field in 2014 that included extensive evaluation for all pesticides, insecticides, petroleum products and other chemicals listed by the Washington Department of Ecology as hazardous substances. The Assessment identified no conditions of concern. However, Ecology has since expanded its list of hazardous substances to include PFAS.