Summary: AFFF/PFAS Site Investigation Documentation

This document is a site assessment and environmental remediation reference file containing maps, sample locations, and analytical data related to Aqueous Film-Forming Foam (AFFF) and Per- and Polyfluoroalkyl Substances (PFAS) contamination at Robins Air Force Base in Houston County, Georgia. The file includes excerpts from a 2018 PFAS Site Inspection Report and 2025 Proposed Lysimeter Maps covering three primary investigation areas: AFFF Area 11 (Middle of Runway), AFFF Area 12 (North End of Runway), and AFFF Area 15 (Near Taxiway C).

The document presents detailed sample location maps with analytical results for multiple PFAS compounds including PFBS, PFHxS, PFNA, PFOA, and PFOS. Sample collection depths are categorized as Surface (SS—0 to 6 inches below ground surface), Subsurface (SO—collected in the vadose zone), and Groundwater (GW). The 2025 lysimeter maps show proposed sampling locations color-coded by detection status relative to Risk-based Screening Levels (RSL), with notation of samples exceeding RSL thresholds. Analytical data tables accompanying each map document PFAS compound concentrations in micrograms per kilogram or liter, groundwater elevation contours, and groundwater flow directions. The document serves as a reference for ongoing environmental monitoring and remediation planning at the contaminated site.