This video is meant for educational purposes; it presents simple PFAS fingerprinting scenarios; One involves two rivers and a fire training facility as a potential PFAS source. The goal is to identify the origin of PFAS detected in downstream surface water samples. A second scenario shows groundwater concentrations in monitoring wells, initially suggesting multiple sources. […]
PFAS Fingerprinting – Appeal and Caveats Read More »
This video explains why PFAS “chemical signatures” measured in groundwater can differ from place to place even when there is only a single contaminant source. The concept of PFAS fractionation (also referred to as PFAS enrichment) is a fundamental fate-and-transport process driven by differential sorption to organic carbon in aquifer materials. This microscale and macroscale
Conceptual Understanding of PFAS Fractionation in Groundwater Read More »
This webinar excerpt explores how aqueous film-forming foam (AFFF) used in firefighting can lead to groundwater contamination, particularly at airports, military bases, and industrial sites. The video explains how per- and polyfluoroalkyl substances (PFAS), often called “forever chemicals,” migrate through the environment and impact groundwater, surface water, and ecosystems. Key topics covered include: AFFF Usage
Visualization of Groundwater Contamination by PFAS Firefighting Foam AFFF Read More »
This webinar excerpt explores how contaminants move through groundwater and provides a mental framework for understanding subsurface pollution. Since groundwater contamination is hidden beneath the surface, visualizing it is often challenging. This presentation enhances conceptual understanding by using a water-saturated sand tank experiment to demonstrate the flow and transport mechanisms of contaminants in groundwater. The
Laboratory Experiment to Visualize Groundwater Pollution Read More »
This video offers a clear and accessible introduction to the fundamentals of groundwater science, ideal for anyone new to the topic or needing a quick refresher. Topics covered include: Basic definitions: aquifers, aquitards, and groundwater zones Groundwater-surface water interactions Confined vs. unconfined aquifers The water table and saturated flow How groundwater flows and how it’s
Groundwater Fundamentals Read More »
The Groundwater Resource provides a brief overview of groundwater as a critical water supply, emphasizing its global significance, hydrogeologic characteristics, and widespread reliance for drinking water and irrigation. This video is an excerpt from the seminar “Introduction to Groundwater Contamination”, presented to the UC Berkeley Department of Civil and Environmental Engineering in September 2021. Key
Why Groundwater Matters: A Visual Overview Read More »
Scope Investigation design and analysis of hydrogeologic data at complex fractured bedrock site enabled identification of PRPs responsible for groundwater plumes beneath and downgradient of manufacturing plant. Investigation findings provide a basis for remedial design and plume apportionment. Prepared a comprehensive Conceptual Site Model report for legal counsel. Process Development of the
Multiparty Contaminant Source Assessment – Fractured Rock Aquifer Read More »
Engaged as a technical advisor to assist a resident in identifying appropriate surface water sampling locations to investigate bacterial contamination. The resident had measured high concentrations of coliform and E. coli bacteria in a creek running through their property after experiencing a rash from bathing/swimming in the water. The objective of the investigation is
Surface Water Bacterial Contamination – Pro Bono Technical Advisory Support Read More »
The short video below describes the composition, use, and potential effects of PFAS-containing firefighting foam known as Aqueous Film Forming Foam (AFFF). It includes pictures and animations that illustrate the evolution of a groundwater plume from a fire training area, the potential impact of the plume on groundwater and municipal water supply, and various other
“Introduction to Groundwater Contamination by PFAS at Airports and Military Bases” Read More »
By Joe Cotruvo(1), Susan Goldhaber(2), and Andrew Cohen, Issue Paper in Groundwater, February 20, 2023. 1. Former Director, USEPA Drinking Water Standards Division. 2. Former Toxicologist, USEPA Per- and polyfluoroalkyl substances (PFAS) are persistent and widely distributed in the environment from commercial products and waste process residues, including in surface waters usually
EPA’s Unprecedented Interim Drinking Water Health Advisories for PFOA and PFOS Read More »
