Persistence of uranium groundwater plumes: contrasting mechanisms at two DOE sites in the groundwater–river interaction zone

JM Zachara, PE Long, J Bargar, JA Davis, P Fox… - Journal of contaminant …, 2013 - Elsevier
We examine subsurface uranium (U) plumes at two US Department of Energy sites that are
located near large river systems and are influenced by groundwater–river hydrologic …

Contaminant mass discharge to streams: Comparing direct groundwater velocity measurements and multi-level groundwater sampling with an in-stream approach

V Rønde, US McKnight, AT Sonne, N Balbarini… - Journal of contaminant …, 2017 - Elsevier
Quantitative knowledge of contaminant mass discharge is useful when assessing the risk
posed to streams by point sources. However, due to a multi-directional flow field at the …

Long-term mass flux assessment of a DNAPL source area treated using bioremediation

AA Haluska, CE Schaefer, J Cho, GM Lavorgna… - Journal of contaminant …, 2019 - Elsevier
This study assessed the long-term effectiveness of bioremediation as a remedial strategy for
a chlorinated, ethene dense, non-aqueous phase liquid (DNAPL) source area, consisting of …

Assessment of Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) Mass Flux and Distributions in a Lake System Using Sediment Bed Passive Flux Meters and …

A Haluska, A Meder, B Susset, K Röhler… - Groundwater …, 2024 - Wiley Online Library
Per‐and polyfluoroalkyl substances (PFAS) are persistent in the environment due to their
chemical stability and can spread quickly in a lake system due to mixing. Passive samplers …

Field demonstration and evaluation of the Passive Flux Meter on a CAH groundwater plume

G Verreydt, MD Annable, S Kaskassian… - … Science and Pollution …, 2013 - Springer
This study comprises the first application of the Passive Flux Meter (PFM) for the
measurement of chlorinated aliphatic hydrocarbon (CAH) mass fluxes and Darcy water …

A stochastic model for estimating groundwater and contaminant discharges from fractured rock passive flux meter measurements

Ö Acar, H Klammler, K Hatfield… - Water Resources …, 2013 - Wiley Online Library
Estimation of water and contaminant discharges is an important hydrological problem.
Fractured rock aquifers are recognized as highly complex flow and transport systems, and …

Expanded application of the passive flux meter: In-situ measurements of 1, 4-dioxane, sulfate, Cr (VI) and RDX

AA Haluska, MS Thiemann, PJ Evans, J Cho… - Water, 2018 - mdpi.com
Passive flux meters (PFMs) have become invaluable tools for site characterization and
evaluation of remediation performance at groundwater contaminated sites. To date, PFMs …

The uncertainty of mass discharge measurements using pumping methods under simplified conditions

X Chen, MC Brooks, AL Wood - Journal of contaminant hydrology, 2014 - Elsevier
Mass discharge measurements at contaminated sites have been used to assist with site
management decisions, and can be divided into two broad categories: point-scale …

Method for assessing source zone natural depletion at chlorinated aliphatic spill sites

R Ekre, PC Johnson, BE Rittmann… - Groundwater …, 2014 - Wiley Online Library
This work focuses on the site‐specific assessment of source zone natural attenuation
(SZNA) at chlorinated aliphatic hydrocarbon (CAH)‐impacted sites. The approach is similar …

[PDF][PDF] Spatially averaged, flow-weighted concentrations–a more relevant regulatory metric for groundwater cleanup

M Einarson - Groundwater Monitoring & Remediation, 2017 - haleyaldrich.com
J= q0C=–KiC(2) where Md is the contaminant mass discharge (M/T), A is the cross-sectional
area of the contaminant plume (L 2) perpendicular to J or the hydraulic gradient, J is the …