Janet Castle
President
Eagle Synergistic Optimizing Technologies
Lakewood, Colorado
Presentation Topic: High Resolution Site Characterization to Assess PFAS Migration and Drinking Water Risk at a U.S. Air Force Base
Presentation Date: November 6, 2025
Meet Your Speaker:
Janet Castle has over 20 years of experience utilizing geophysics, petrophysics, geology, hydrology, and geochemistry to optimize sites. She is a Professional Geologist and president of Eagle Synergistic Optimizing Technologies which focuses on High Resolution Site Characterization and Subsurface investigations. Other areas of expertise include working with geochemical data to correlate soil and groundwater samples to HRSC subsurface imaging data, including a portable onsite lab grade GC and 3D modeling. As a geologist and petrophysicist, she has developed optimized strategies for various types of sites, including commercial, Superfund, EPA, Oil & Gas, and DOD sites with Eagle’s 8(a) designation. She recently helped upgrade the investigative methods for PFAS sites and is actively engaged in the rapidly evolving world of PFAS science and regulations. Her education is in geophysics and petroleum geology at the University of Houston and Colorado School of Mines.
Presentation Abstract:
To address PFAS contamination linked to historical firefighting activities, the U.S. Army Corps of Engineers and Department of the Air Force conducted a non-time-critical removal action at an Air Force base. High Resolution Site Characterization (HRSC) using HPT-EC and Ground Water Sampler tools was performed to map subsurface features and assess the potential for PFAS migration into drinking water sources. The HPT-EC data provided real-time data on permeability, hydrogeology, and potential confining intervals. The detailed subsurface understanding enabled the delineation of PFAS pathways and plume extent, allowing for more accurate risk assessment and development of a targeted remedial strategy.