Preliminary Assessment (PA) and Site Inspection (SI) for Basewide Investigation of Per- and Polyfluoroalkyl Substances (PFAS), Naval Weapons Station (NWS) Seal Beach, CA.

For this task order, GCE conducted a Basewide Preliminary Assessment and Site Inspection for PFAS. The PA portion of the project was a data gathering effort to determine locations of possible releases of PFAS and the environment. This information is being used to develop the PA report that identifies sites for further investigation during the SI. Up to 60 potential sites have been identified as warranting additional investigation in the SI. The project included preparing a SI Work Plan, SAP, and APP/SSHP.

The purpose of this project was to perform a basewide Preliminary Assessment and Site Inspection (PA/SI) for per- and polyfluoroalkyl substances (PFAS) at NWS Seal Beach, CA. PFAS are a class of anthropogenic compounds characterized by carbon chains of varying lengths containing carbonfluorine bonds. The pervasive use of PFAS in commercial and industrial products has led to the discovery of PFAS in soil, air, and groundwater at storage and production facilities and at private and government-owned facilities. PFAS are an environmental concern and considered an emerging contaminant by the U.S. Environmental Protection Agency. PFAS have been used in a variety of military applications, including as a component in Aqueous Film Forming Foam, which was routinely used at fire-fighting training areas and equipment test areas, and is still used at crash sites and some fire suppression systems in hangars.

The PA portion of the project was a data gathering effort to determine locations of possible releases of PFAS into the environment. Available data bases were researched, and interviews were conducted with available current and former Station personnel to determine if a site may have had a release of PFAS. This information was used to develop the PA report which identifies sites for further investigation during the SI. Up to 60 potential sites have been potentially identified as warranting additional investigation in a SI during the PA data gathering process.

Due to limitations of Government funds, the funding for conducting the field work and reporting portions of the SI were reallocated to allow for an increase in the scope of the PA. Although the field work was removed, the task order still included the preparation of an Accident Prevention Plan, a Site-specific Safety and Health Plan, an Activity Hazardous Analyses, a Work Plan, and a Sampling and Analysis Plan.