EPA Superfund Site
GEORGE AIR FORCE BASE
CA | EPA ID CA2570024453
About this site’s exposure pathways:
As of November 2025, the Former George Air Force Base (Former GAFB) Superfund site is considered “Insufficient Data to make a Human Exposure evaluation” (HEID) because of a newly identified exposure pathway and/or contaminant(s). PFAS is being investigated at Sites FT019, FT020, and CG070 in soil and groundwater. The site was previously categorized as HEUC (Human Exposure Under Control). The current remedy is monitored natural attenuation at CG070 and 2 soil vapor extraction systems at the FT019 site. The occurrence of PFAS does not affect the protectiveness of these remedies.
“EPA uses this Human Exposure status when there is a lack of evidence to suggest that actual or reasonably anticipated human exposures are occurring and that those exposures are above acceptable risk-based levels. The planned activities to collect sufficient information to evaluate this new exposure pathway and/or contaminants(s) are Groundwater samples will also be collected from off-base private wells and public production wells. The wells will be sampled, and the groundwater will be analyzed using USEPA Method 1633 to evaluate potential impacts from PFAS. A baseline Human Health Risk Assessment and Ecological Risk Assessment will be completed and the Conceptual Site Model for the site will be updated. The following exposure pathways will be investigated: 1) Future exposure to groundwater via ingestion as a potable drinking water resource; 2) Future and current outdoor worker contact with surface and subsurface soil via incidental ingestion and dermal contact; 3) Future construction worker contact with groundwater, surface and subsurface soil via incidental ingestion and dermal contact; 4) Future recreational user contact with surface water via incidental ingestion and dermal contact. Air Force currently anticipates that there will be sufficient data to make a Human Exposure evaluation by 09/30/2027 because this is the target schedule for an approved PFAS Remedial Investigation report.