Naval Facilities Engineering Systems Command - Hawaii
Environmental Restoration, Navy (ER,N) Program at Red Hill

PFAS Remedial Investigation

Drilling rig parked by the side of the raod.
A drill rig was used to install a groundwater monitoring well in the drinking water aquifer for PFAS sampling (2024)
Groundwater sampling equipment arranged around a monitoring well.
Groundwater sampling for PFAS in the drinking water aquifer, Remedial Investigation quarterly groundwater monitoring, Quarter 1 (October 2024)
Piping for the firefighting suppression system where the PFAS-containing foam was initially released
The Adit 6 AFFF dispensing piping where AFFF was released to the environment (November 2022)
Grassy entrance to a culvert under a roadway.
Following the AFFF release at Adit 6, the Navy sampled sediments in this drainage culvert to test for PFAS after cleanup (November 2022)
Excavator removing impacted soil at the location of the PFAS release
Following the AFFF release at Adit 6, the Navy excavated the impacted soil, collected confirmation soil samples and backfilled the excavations (November 2022)
Am above-ground tank with piping.
A 200-gallon AFFF concentrate tank was installed adjacent to Adit 6 in the 1960s and removed in 2008

A Remedial Investigation (RI) is being conducted to evaluate per- and polyfluoroalkyl substances (PFAS) associated with known and potential undocumented aqueous film-forming foam (AFFF) release areas located at the Red Hill Bulk Fuel Storage Facility (RHBFSF). The purpose of the RI is to evaluate the nature and extent of potential PFAS impacts, and to characterize potential risks to human health and the environment associated with exposure to PFAS. The investigation is focused near Building (Bldg.) 313, including the areas outside and adjacent to the Adit 6 entrance where a release of AFFF occurred in November of 2022 during maintenance of the AFFF storage and pumping system for the Facility, as well as near the Red Hill Shaft (RHS) Water Pump House and at the western extent of the RHBFSF within the former Oily Waste Disposal Facility (OWDF).

RI field activities include quarterly groundwater monitoring for one year of selected wells within the Facility property; monitoring well installation, and groundwater sampling of newly installed wells; and surface and subsurface soil sampling in locations associated with the November 2022 release and in the vicinity of elevated PFAS concentrations in groundwater. This website provides links to the data and reports being generated by the RI and will be updated on an ongoing basis.

PFAS Remedial Investigation Areas

Red Hill PFAS Timeline (Click to Expand)

Documented RHBFSF AFFF Activity
(1962-2018)
Initial AFFF Release Response Actions
(2022-2023)
Initial Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) Actions
(2021-2023)
Current CERCLA Actions
(2024-2025)
Future CERCLA Actions

Data and Reports of Current Activities

Analytical Data

Laboratory Data Validation Reports for First Quarter Groundwater Monitoring Data (October 2024)

Reports

Draft PFAS Remedial Investigation Work Plan (June 2024)
EPA Letter in Response to Priority Comments (September 2024)

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