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OLF Coupeville On-Base PFAS Investigation

Across the country, the Navy has been conducting base-wide evaluations to identify additional potential PFAS releases. These evaluations are being conducted under the Navy’s Environmental Restoration Program which meets the requirements of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Following CERCLA, the Navy’s base-wide assessments are called preliminary assessments/site inspections, and their purpose is to verify, validate, and update the inventory of PFAS release sites aboard the installation for further investigation and cleanup. 

At NAS Whidbey Island, the Navy has completed Preliminary Assessment (PA) for Outlying Landing Field (OLF) Coupeville. The PA identified 3 sites with potential PFAS releases and a Site Inspection was conducted to determine the presence of PFAS in the soil and groundwater. The SI confirmed PFAS in soil and groundwater, thus the site has proceeded to the next step in the CERCLA process, the Remedial Investigation (RI).  The purpose of a remedial investigation is to delineate the extent of PFAS and conduct human health and ecological risk assessments to determine if a remedial action is required. The Final PA, Sampling and Analysis Plans, technical memorandums, and reports are under ‘Documents’.  More information will be added to this website as it is available.



Final Aquifer Test Data Evaluation and Groundwater Modeling Report, September 2018.pdf
Final Evaluation of Per- and Polyfluoroalkyl Substances in Groundwater, May 2018.pdf
Final Preliminary Assessment for Per- and Polyfluoroalkyl Substances Coupeville, November 2018.pdf
Final SAP Site Inspection for Perfluorinated Compounds in Groundwater, January 2017.pdf
Final SAP Aquifer Testing, Drinking Water and Groundwater Sampling Keystone Hill Well, Dec 2017.pdf
Final SAP Supplemental Site Inspection, Coupeville, August 2019.pdf
OLF Coupeville SSI SAP Addendum, July 2020
Final Supplemental Site Inspection Report, Coupeville, October 2021
OLF Coupeville SSI Report Addendum, Jan 2022
OLF Coupeville PFAS RI SAP, Jan 2022


If you have any questions, please contact one of the Public Affairs Officers listed below.

Mike Welding, NASWI Public Affairs Officer
Office: 360-257-2962
Mobile: 360-914-7915 

Sarah Lincoln, NAVFAC Northwest Public Affairs Officer
Office: 360-396-6387 
Mobile: 360-340-5592

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