Operationalizing EPA's PFOA & PFOS CERCLA Designation: 1.0 lb/24-hr RQ Mass Screening, Phase I ESA RECs & Superfund PRP Liability Allocation
Court Ruling Effect: PFAS is now formally designated under CERCLA § 102(a). Site assessments under ASTM E1527-21 must categorize historical or active PFOA/PFOS presence as a formal Hazardous Substance REC rather than an optional non-scope emerging contaminant.
| PRP Category | Allocation % | Est. RI/FS Exposure |
|---|---|---|
| Current Facility Owner / Operator | 45% | $1,125,000 |
| Historical Operators (18 yrs) | 35% | $875,000 |
| Chemical Manufacturers / Arrangers | 20% | $500,000 |
| Total Est. Response & Remediation | 100% | $2,500,000 |
| Metric / Regulatory Variable | Calculated Value | Statutory Threshold & Legal Authority |
|---|---|---|
| Total Active PFAS Release Mass | 1.355 lbs | 1.000 lb / 24-hr Reportable Quantity (CERCLA § 102) |
| Reportable Quantity (RQ) Exceeded? | TRUE | Threshold determination triggers strict § 103 liability |
| National Response Center (NRC) Mandate | Immediate (within 24 hours of knowledge) | 42 U.S.C. § 9603; failure to report carries criminal fines |
| ASTM E1527-21 Phase I ESA Status | Recognized Environmental Condition (REC) - Hazardous Substance | Post-ruling CERCLA classification supersedes non-scope treatment |
| CERCLA Liability Classification | High Exposure (Strict, Joint and Several Liability) | CERCLA § 107(a) 4-part Superfund PRP allocation model |