Terraphase provided remediation services at an industrial site in New York. The site is enrolled in the New York State Department of Environmental Conservation (NYSDEC) Brownfield Cleanup Program (BCP), a remedial program governed by 6 NYCRR Part 375. In accordance with program requirements, the site investigation included evaluation for per- and polyfluoroalkyl substances (PFAS).
Scope of Services
Terraphase prepared and implemented a Remedial Investigation Work Plan addressing PFAS sampling in soil and groundwater using U.S. Environmental Protection Agency (USEPA) Method 1633. Soil samples were collected via GeoProbe® direct-push technology using PFAS-compatible materials in accordance with NYSDEC guidance. Groundwater samples were obtained from permanent on- and off-site monitoring wells using low-flow sampling techniques and PFAS-compatible polyethylene tubing. While no historical PFAS usage was documented at the site, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) were detected in one soil sample below the unrestricted use threshold. Groundwater samples showed PFAS concentrations above New York fresh groundwater (Class GA) ambient water quality standards, though these are considered consistent with known regional background levels in the Bronx and New York City area. NYSDEC will make a final determination following review of the Remedial Investigation Report.
Notable Accomplishments
- Conducted PFAS soil and groundwater sampling in accordance with NYSDEC 2023 guidance
- Supported regulatory compliance under the NYSDEC Brownfield Cleanup Program
