Haley Schneider, Ph.D. (California) authored an article entitled “High-Resolution Characterization of a Chlorinated Solvent Impacted Aquifer Using a Passive Profiler” for publication in Groundwater Monitoring & Remediation on September 13, 2020.

Haley’s coauthors were Andrew Jackson, Paul Hatzinger, and Charles Schaefer.

Haley Schneider is a Senior Staff Engineer based in California focused on the development of an innovative passive groundwater sampling technology in conjunction with the evaluation of existing profiling tools for the delineation of microbial communities, biogeochemical conditions, chlorinated volatile organic compounds (cVOC) concentrations, and groundwater velocity in shallow aquifers. She also has experience with SigmaPlot, Matlab, and ArcGIS softwares.

Since its inception in 1981, Groundwater Monitoring & Remediation has been a resource for researchers and practitioners in the field. It is a quarterly journal that offers application oriented, peer-reviewed papers together with insightful articles from the practitioner’s perspective. Each issue features papers containing cutting-edge information on treatment technology, columns by industry experts, news briefs, and equipment news. Groundwater Monitoring & Remediation plays a unique role in advancing the practice of the groundwater monitoring and remediation field by providing forward-thinking research with practical solutions.

The National Ground Water Association is a community of groundwater professionals working together to advance groundwater knowledge and the success of our members through education and outreach; advocacy; cooperation and information exchange; and enhancement of professional practices.

Abstract/Description

A direct‐drive high‐resolution passive profiler (HRPP) was developed to quantify and delineate concentrations of chlorinated volatile organic compounds (CVOCs), geochemical indicators and CVOC‐degrading microorganisms/genes, as well as to perform compound‐specific stable isotope analysis (CSIA) of CVOCs and estimate interstitial velocity at <30‐cm resolution. The profilers can be coupled together to provide a continuous sample interval and advanced to depths up to approximately 9 m below‐ground surface (bgs) within saturated media where direct‐push techniques are feasible. The HRPP was field tested in a previous dense nonaqueous phase liquid (DNAPL) source zone at the former Naval Air Station in Alameda, CA. HRPP data sets were compared to the following traditional groundwater data sets: CVOC and anion concentrations in standard and multilevel monitoring well water samples, CVOC concentrations in soil core samples, qualitative contaminant profiles delineated with a membrane interface probe (MIP), microbial community and CSIA profiles from Bio‐Traps® deployed in wells, groundwater velocity from passive flux meters (PFMs), lithologic profiles correlated with MIP electrical conductivity (EC), and velocity estimates based on permeability profiles measured with a Geoprobe hydraulic profiling tool (HPT). In some cases, the HRPP data were equivalent to traditional techniques and, in other cases, the HRPP data were more representative of local variability rather than bulk aquifer conditions. Overall the results support the use of the HRPP to provide high‐resolution data on concentrations, velocity, and microbial activity in temporary direct‐push deployments without well installation, providing a new tool to better assess source zones and contaminated groundwater plumes, even in low permeability media, and to increase the fidelity of site transport models.

More Information

About the article: https://doi.org/10.1111/gwmr.12409
About Groundwater Monitoring & Remediation: https://ngwa.onlinelibrary.wiley.com/journal/17456592
For consultation regarding groundwater remediation, contact Haley at HSchneider@Geosyntec.com
Learn more about Haley: https://www.linkedin.com/in/haley-schneider-phd-eit-6602a215a/