EPA has released its Draft Interim Recommendations for Addressing Groundwater Contaminated with Perfluorooctanoic acid (PFOA) and Perfluorooctane sulfonate (PFOS) for public review and comment as part of the Agency’s PFAS Action Plan commitments.
EPA developed the draft recommendations based the Agency’s current scientific understanding of per- and polyfluoroalkyl substances (PFAS) toxicity. The recommendations are intended to provide clear and consistent guidance for federal cleanup programs, including the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA, commonly referred to as “Superfund”). The recommendations are also intended to aide state and tribal cleanup programs, and in carrying out other federal regulatory authorities (e.g., federal facility cleanup programs and approved state Resource Conservation and Recovery Act corrective action programs). When finalized, the recommendations will provide guidance to responsible parties as they make site-specific characterization and cleanup decisions for PFOA and PFOS.
The guidance provides recommendations on:
- Screening levels, which are used to determine if levels of contamination may warrant further investigation;
- Preliminary remediation goals (PRGs) to inform site-specific cleanup levels for PFOA and PFOS contamination of groundwater that is a current or potential source of drinking water. PRGs are initial targets for cleanup, which may be adjusted on a site-specific basis as more information becomes available.
EPA is seeking comments on all parts of the recommendations, including the use of EPA’s Lifetime Drinking Water Health Advisory level of 70 ng/L or parts per trillion as the recommended PRG for groundwater, or whether higher or lower values would be supported.