EPA Superfund site
NORTON AIR FORCE BASE (LNDFLL #2)
Exposure status: insufficient data
Data limitations: Proximity to a Superfund site boundary does not mean your property is contaminated. EPA site boundaries show the area designated for cleanup, not the full extent of contamination. Groundwater plumes can extend beyond site boundaries. This tool shows publicly available EPA federal data. It is not affiliated with or endorsed by EPA, and is not a substitute for a professional environmental assessment.
About this site's exposure pathways
As of September 2026, the Norton Air Force Base (Landfill #2) Superfund site is considered “Insufficient Data to make a Human Exposure evaluation” (HEID) because of contaminant(s), more specifically, PFAS contamination in surface soil at two locations. The site was previously categorized as "Human Exposures Under Control "HEUC".
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 the development of a Remedial Investigation to fully evaluate the extent of PFAS contamination and evaluate risk to receptors. In order to address vapor intrusion concerns, the Air Force agreed in a letter dated April 22, 2021, to "... pursue the addition of Land Use Controls (LUCs) prohibiting residential uses to protect against potential vapor intrusion via a formal Explanation of Significant Differences (ESD) for IRP Site 17 and AOC 33." EPA currently anticipates that there will be sufficient data to make a Human Exposure evaluation by September 2029 because a Remedial Investigation addressing PFAS and the LUC prohibiting residential restrictions will have been completed by then.