vadose zone monitoring Articles

  • Migration and transformation behavior of volatile phenol in the vadose zone

    Research on the migration and transformation of phenol with space and temporal variability in the vadose zone is hindered by monitoring technology in field experiments. Four column experiments were conducted to investigate the effect of porous media size, volatilization, biological effects, and oxidation on the transport of phenol in the vadose zone. The initial inflow phenol concentration of ...


    By IWA Publishing

  • Risk-Based Closure Considerations For Monitored Natural Attenuation

    ABSTRACT Recent advances in both the chemistry- and hydrogeology-based aspects of monitored natural attenuation (MNA) and in toxicology research have changed some of the traditional approaches to MNA for petroleum and chlorinated groundwater plume management. For MNA to be approved as a remedial approach, human health and the environment must still be protected. To demonstrate protection, ...


    By Weston Solutions, Inc

  • Tacoma, Washington - Well 12A superfund site - Case Study

    Combined Remedies for DNAPL Remediation Project Summary TRS Group, Inc. (TRS) teamed with KEMRON and AMEC, under KEMRON's U.S. Army Corps of Engineers (USAGE) Environmental Remediation Services Multiple Award Task Order Contract (MATOC), to perform electrical resistance heating (ERH) for the remediation of volatile organic compounds (VOCs) in the vadose zone ...


    By TRS Group, Inc.

  • In-Situ Anaerobic Remediation of Perchlorate-Impacted Soils

    AbstractARCADIS is currently leading the development, evaluation, and selection of a final groundwater remedy for a 94-acre manufacturing facility in the western U.S. This facility has produced small explosives and vehicular safety products since 1957. As a result of historic operations, soil and groundwater at the site have been impacted by perchlorate. To date, remediation efforts have been ...


    By Arcadis

  • Enhanced Bioremediation of Tetrachloroethene in Central Indiana Glacial Till

    ABSTRACT: The goal of this project is remediation of soil and groundwater impacted by tetrachloroethene (PCE) that infiltrated the vadose and uppermost saturated zone below an active dry cleaning facility in central Indiana. PCE was released and transported to depths less than five meters via the primary porosity of thin sand and silt stringers and via secondary porosity of fractures in lodgment ...

  • Ground Water Sampling - A Workshop Summary

    Monitoring purposes have evolved in the past decade reflecting an increasing emphasis on assessment and remedial action performance over detection monitoring. The recognition of many potential contamination sources as well as the regulatory inclusion of a large number of sites in need of investigation have spurred this evolution in practice. New more efficient methods and tools for ...


    By QED Environmental Systems

  • Reclaimed Water Aquifer Storage and Recovery: Potential Changes in Water Quality

    Aquifer storage recovery (ASR) operations recharge and recover water through the same well or wells, creating a “bubble” of stored water that typically mixes minimally with ambient groundwater once the storage zone has been developed. Because ASR recharge water does not flow through a vadose zone and is not drawn through an aquifer to a distant point of withdrawal, changes in water quality that ...

  • Common Treatment Technologies for Fuels in Ground Water, Surface Water, and Leachate

    It may be necessary to know other subsurface information to remediate fuels in ground water. Treatability testing to characterize contaminant biodegradability and nutrient content may be needed for any biodegradation technology. A subsurface geologic characterization would be particularly important to characterize the migration of NAPLs. Recovery tests are usually necessary to design a ...

  • Impact of recycled water use at mammoth golf courses on basin groundwater quality

    ABSTRACT The Mammoth Community Water District’s proposed plan for recycled water use in golf course irrigation as a solution to the district’s water shortage problem develops concerns over protecting its basin groundwater quality. A detailed assessment through model development, and monitoring and testing is done in this study to determine the fate and transport of concerned pollutants in ...

  • In Situ Biological Treatment for Ground Water, Surface Water, and Leachate

    The main advantage of in situ treatment is that it allows ground water to be treated without being brought to the surface, resulting in significant cost savings. In situ treatment, however, generally requires longer time periods, and there is less certainty about the uniformity of treatment because of the variability in aquifer characteristics and because the efficacy of the process is more ...

  • Combined use of ISCO and ISCR to treat CVOCs at industrial site in Texas, USA

    Groundwater at an industrial site in Texas is impacted with Chlorinated Volatile Organic Carbon’s (CVOCs), primarily PCE and TCE, from historical waste disposal. The topography at the site slopes steeply towards a small channel where the groundwater discharges. Depth to groundwater ranges from approximately 20 ft bgs at the source area to 1 ft bgs close to the channel. The soil consists of silty ...


  • EPA Technology News & Trends - Tacoma “Well 12A” Superfund Site

    The U.S. EPA Region 10 office uses an adaptive site management approach that relies on high-resolution site characterization (HRSC) techniques for strategic sampling at the Well 12A project area. This approximate one-square-mile project area is one of three at the 2.5-square-mile Commencement Bay-South Tacoma Channel Superfund site in Tacoma, Washington. The vicinity of Well 12A, one of 13 wells ...


    By TRS Group, Inc.

  • Biodegradation of MTBE Utilizing A Magnesium Peroxide Compound: A Case Study.

    ABSTRACT: A patented magnesium peroxide compound was recently employed at an underground storage tank facility to increase the available oxygen in the groundwater for the biodegradation of fuel hydrocarbons. The objective of this remedial effort was to substantially reduce the dissolved-phase concentrations of BTEX and MTBE and to arrest further migration of the dissolved fuel hydrocarbon plume. ...


    By REGENESIS

  • Full-scale SVE system operates in tandem with groundwater treatment

    Since 1993, SVE has been implemented using two designs at the TP Industrial, Inc. (TPI) site in Gardena, CA, to treat soil contaminated with chlorinated solvents. The SVE system was modified in 1997 to improve emissions control efficiency by using carbon adsorption units that treat effluent from an air-stripping system for treating site ground water. By the end of 2007, SVE had removed a ...

  • Assessing the transport and fate of MTBE

    Untitled Document ...


    By Solinst Canada Ltd.

  • Case Study - TCE Source Area Remediation at a Former Manufacturing Facility Confidential Client – Western Connecticut

    Project Summary TRS Group, Inc. (TRS), as a subcontractor to AECOM, completed a Standard Fixed Price Remediation (SFPR) of trichloroethene (TCE) in groundwater in Western Connecticut using Electrical Resistance Heating (ERH). The objective of the ERH project was to achieve the prescribed remediation goal for dissolved TCE in groundwater within the treatment volume. The system ...


    By TRS Group, Inc.

  • Case Study - Jamaica Queens, New York - Full-Scale Remediation using ERH

    This project involved a guaranteed source area remediation of tetrachloroethene (PCE) at an operating school bus maintenance facility located in Queens, New York. Engineer: Mr. Greg Beyke Project Superintendent: Mr. Paul Bianco Lithology: Clean sand in both the vadose and saturated zones. Hydrology: Groundwater depth at 12 ft below grade surface (bgs). Treatment Area, Depth Interval ...


    By TRS Group, Inc.

  • The In Situ Bioremediation/Groundwater Remediation Process

    In-situ groundwater bioremediation is a technology that encourages growth and reproduction of indigenous microorganisms to enhance biodegradation of organic constituents in the saturated zone. In-situ groundwater bioremediation can effectively degrade organic constituents which are dissolved in groundwater and adsorbed onto the aquifer matrix. The Adventus In Situ Bioremediation/Groundwater ...


  • ASTM Standards Help Meet Need for Clean Water

    The new ASTM Water Portal provides a single access point to standards and related information about ASTM International’s diverse committees working to protect and monitor this vital global resource. Clean and safe water is the underpinning of the quality of life for people around the world. Global economies depend on water, whether it’s to support the manufacturing of goods ...


    By ASTM International

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