PFAS INVESTIGATION AND RISK ASSESSMENT

HGL geologist collecting a drinking water sample from a residence for PFAS analysis.
Overview

Investigating PFAS requires a diverse technical, regulatory, and management skill set to navigate the evolving science, guidance, and regulations. HGL’s cross-disciplined staff of chemists, community involvement specialists, engineers, geologists, hydrogeologists, hydrologists, GIS specialists, historians, project managers, and regulatory specialists collaborate to provide clients with a comprehensive team to tackle their investigative needs. HGL’s PFAS training program requires certification internally and an annual review of company PFAS sampling SOPs for all field team members to ensure quality. HGL’s PFAS teams have conducted more than 150 PFAS studies at over 90 DoD, DLA, NASA, EPA, and commercial sites across the country.

A sample of HGL’s recent or ongoing PFAS project accomplishments is provided below:

  • CERCLA Preliminary Assessments (PAs) at over 86 installations and thousands of sites ranging from fire training areas, fire stations, stormwater systems, burn pits, landfills, hangars, crash and spill sites, and storage sites
  • CERCLA Site Inspections (SIs) at over 45 installations and 500 sites where drinking water was potentially impacted.
  • CERCLA Remedial Investigations (RIs) at 44 investigation sites and 9 installations. One RI is complete, four have initial fieldwork complete, and four are in the work plan phase.
  • Data gap investigations outside of the CERCLA process, including Drinking Water Protection Studies and CSM updates. HGL’s hydrogeologists have performed seven of these studies.

As part of the RIs, HGL has completed human health risk and ecological risk assessments evaluating potential risks posed by PFAS in groundwater, soil, sediment, and surface water. HGL’s risk assessors are experienced in reviewing the literature to identify appropriate ecotoxicity information to support evaluation of PFAS compounds that lack ecological screening values.

Some of HGL’s specialized PFAS capabilities are explained in more detail on the PFAS Chemistry, Forensics, and PFAS-DSS pages.

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