Revise groundwater cleanup regulations to account for PFAS

Research notes

• One negative search covered the OLEM and Superfund asks on pp. 431-433.
• A Federal Register search of EPA documents since 2025-01-20 for “groundwater” “cleanup level” found none.
• The nearest PFAS cleanup-guidance action in the window is the 2026-07-06 draft guidance for reducing risk from PFOA and PFOS in biosolids — a different medium and not a regulation.
• #1126 (major) covers the designation itself and is not started for the same reason: EPA revisited it and kept it.
• EPA’s full regulatory agenda, searched 2026-09-01. We read EPA’s entire Unified Agenda on reginfo.gov (214 entries across the active, long-term and completed stages), because the Federal Register prints only the entries that need a Regulatory Flexibility analysis and the 2026-08-27 negatives were taken from that shortened version. Nearest entries: RIN 2050-AH27, Definition of Hazardous Waste Applicable to Corrective Action for Releases from Solid Waste Management Units (EPA/OLEM, Long-Term Actions, 40 CFR 260, 261 and 270, proposed 2024-02-08 at 89 FR 8598) and RIN 2050-AH25, Addressing PFAS in the Environment (EPA/OLEM, Long-Term Actions, 40 CFR 302.4, ANPRM 2023-04-13 at 88 FR 22399): https://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202510&RIN=2050-AH27 and https://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202510&RIN=2050-AH25. The first is where RCRA corrective action — and so groundwater cleanup at operating facilities — lives, but it is about the §1004(5) definition and never mentions PFAS; the second is the CERCLA designation docket, not a cleanup regulation. Neither is this ask’s object, so the Status is unchanged.