New Pennsylvania Department of Environmental of Protection (“PADEP”) regulations that include new cleanup standards for three per- and polyfluoroalkyl substances (PFAS) were published in the Pennsylvania Bulletin on Saturday, November 20, 2021, and are now effective and available for remediation under the Pennsylvania Land Recycling and Environmental Remediation Standards Act (“Act 2”).
We have discussed these new cleanup standards in prior posts. This regulatory revision includes the following new groundwater and soil medium-specific concentration (“MSC”) for three PFAS – Perfluorooctanoic Acid (PFOA), Perfluorooctane Sulfonate (PFOS), and Perfluorobutane Sulfonate (PFBS):
| Substance | Soil | Groundwater |
| PFOA |
4.4 mg/kg (residential 64 mg/kg (non-residential) |
0.07 μg/L |
| PFOS |
4.4 mg/kg (residential 64 mg/kg (non-residential) |
0.07 μg/L |
| PFBS |
66 mg/kg (residential) 960 mg/kg (non-residential) |
10 μg/L (residential) 29 μg/L (non-residential) |