dnapls News

  • Characterizing DNAPL source zones for remedial performance assessment

    Chlorinated solvents have been used extensively in industry and are common groundwater contaminants. Their limited aqueous solubility often leads to the presence of dense non-aqueous phase liquid (DNAPL) source zones, which may persist due to mass transfer limitations from the DNAPL to groundwater. While recent research effort has been directed to the development of effective source zone ...


    By Solinst Canada Ltd.

  • Abanaki Corporation Releases DNAPL Groundwater Remediation System

    Abanaki Corporation is pleased to announce a DNAPL Groundwater Remediation System designed to remove high viscosity oils such as creosote from groundwater. These systems are used to remove oil contamination from existing monitoring wells. DNAPLs such as creosote tend to sink to the bottom of a well and require a specially designed system to ensure the oil is removed. Stabilizer bars are installed ...


    By Abanaki Corporation

  • Clean-up of dense nonaqueous-phase liquids (DNAPLs) at US hazardous waste sites

    The US EPA's Office of Superfund Remediation and Technology Innovation has constructed a website that compiles available information related to the cleanup of dense nonaqueous-phase liquids (DNAPLs) at hazardous waste sites. This initial phase addresses the most common DNAPL contaminants: chlorinated ethenes (e.g., tetrachloroethene and trichloroethene) and multi-component wastes (creosotes, ...

  • Volatile dense chemical liquids in groundwaters can produce slowly bubbling gas flow

    Despite decades of research, the cleanup of soil and groundwater contaminated by dense non-aqueous phase liquids (DNAPLs) used in numerous industrial applications remains a daunting challenge. These compounds, including degreasers, dry cleaning fluids, creosote, solvents and coal tar, when present below ground can generate hazardous concentrations for decades to centuries as they dissolve into ...

  • Statement of Qualifications: Dry Cleaner Sites and Chlorinated Solvent Remediation

    The Adventus Group is an environmental biotechnology company that provides various remediation biotechnologies, including those exclusive to our patent portfolio. We are not consultants – we support our clients’ project teams by providing unbiased design support and selection of the most cost-effective remedial solution or strategy. As appropriate, our proven products may ...


  • The Use of Tersus Marketed eZVI for Soil & Groundwater Remediation Is Not ZVI Patent Infringement

    Currently, there is some confusion and uncertainty about whether the use of eZVI for soil and groundwater remediation infringes on U.S. Patent 7,531,709 (“the ‘709 patent”) titled Method for Accelerated Dechlorination of Matter. While some of you may have received notices (either oral or written) alleging that any use of ZVI plus soybean oil for soil and groundwater remediation ...


    By Tersus Environmental, LLC

  • Petroleum-impacted soil remediation

    The Adventus Group is an applied environmental products company that provides various remediation biotechnologies – including those exclusive to our patent portfolio (see below). We are NOT consultants, and are geared towards supporting client project teams by providing unbiased design, support and selection of the most cost-effective remedial solution or strategy. As appropriate, our ...


  • Dakota Technologies Offers Detection of Underground Coal Tars, Creosotes and Bunker Fuels

    Dakota Technologies introduces a sub-surface screening service, which uses the TarGOST® (Tar-specific Green Optical Screening Tool) to efficiently delineate multi-component dense non-aqueous phase liquids (DNAPLs). This tool is extremely effective for mapping in-situ coal tar and ...


    By Dakota Technologies, Inc.

  • Chlorinated solvent contaminated groundwater remedial action approved by Florida DEP

    P2 Environmental, Inc. has received approval from the Florida Department of Environmental Protection (FDEP) to implement an innovative remediation strategy to clean up groundwater contaminated by dissolved and separate-phase chlorinated solvents. The remediation will be completed at a former manufacturing facility located in west-central Florida. The strategy employs a combination of ...


    By P2 Environmental, Inc.

  • Solinst releases new Interface Meter Design

    Solinst is excited to announce a new version of the 122 Interface Meter, designed to accurately measure product level and thickness (LNAPL and DNAPL) in water wells and tanks, with more reliability and durability. The Interface Meter's improved design features Solinst PVDF flat tape that is precisely laser marked every 1/100 ft. or each millimeter (markings are certified traceable to national ...


    By Solinst Canada Ltd.

  • ISCR-Enhanced bioremediation accelerates groundwater cleanup at active manufacturing facility

    In the winter of 2008, full-scale in situ chemical reduction (ISCR) was implemented as a removal action at the Siltronic Corporation site in Portland, OR, to treat a source area contaminated by releases of TCE. The source area was considered to be the portion of the site with concentrations of TCE in groundwater greater than 11,000 µg/L, suggesting the presence of TCE as DNAPL. ...


  • Groundwater contaminant assessment and remediation subjects of NGWA courses in Maryland

    Groundwater industry professionals can increase their remediation technology knowledge in two different National Ground Water Association short courses taking place September 2008 in Baltimore, Maryland. “Understanding Migration, Assessment, and Remediation of Non-Aqueous Phase Liquids,” September 23-25, provides hydrogeologists, regulators, and anyone dealing with ground water contamination ...

  • We are Gonna Need a Bigger Pump

    The Problem: At a large industrial site, traditional horizontal and vertical extent investigations failed to reveal what eventually turned out to be highly localized seams of Trichloroethylene (TCE) DNAPL at areas of the property where unusual lithology came into play.  In addition to the “hide & seek” nature of finding the contamination in these areas, it became ...

  • ASTM D6429 - 99(2011)e1 standard guide for selecting surface geophysical methods

    This guide applies to commonly used surface geophysical methods for those applications listed in Table 1. The rating system used in Table 1 is based upon the ability of each method to produce results under average field conditions when compared to other methods applied to the same application. An “A” rating implies a preferred method and a “B” rating implies an alternate ...


    By ASTM International

  • Supersaturated Water Injection

    Passive Gas infusion is a patented technology that efficiently dissolves high concentrations of CO2 into water at elevated pressures. Supersaturated Water Injection (SWI) is an effective technology for NAPL recovery. CO2 supersaturated water injected into the subsurface results in the nucleation of CO2 bubbles at and away from the injection point. As the supersaturated liquid flows through the ...

  • NGWA offers course on estimating remediation times for monitored natural attenuation

    The National Ground Water Association is offering a course on estimating remediation times for monitored natural attenuation (MNA) and contaminant source removal April 28-29 in Charlotte, North Carolina.  The course will present a decision-making framework and methodology for assessing MNA and estimating timeframes required for natural attenuation processes to lower contaminant ...

  • Abanaki Oil Skimmers Provide Lowest-Cost Method for Groundwater Remediation

    CLEVELAND - Abanaki Corporation offers a cost-effective way to remove hydrocarbon contamination from groundwater without pumps. Engineers in industrial settings have, for many years, valued oil skimmers as the lowest cost way to remove hydrocarbons from wastewater. Food processing plants, the metals industry, machining firms, and utilities have all used skimmers with great success ...


    By Abanaki Corporation

  • Abanaki Announces Variety of Groundwater Remediation Systems to Effectively Remove Hydrocarbons

    Abanaki Corporation is pleased to announce the addition of six new Groundwater Remediation Systems specially designed for a variety of groundwater contamination applications with specific site requirements. These Groundwater Remediation Systems are designed to handle Light Fuel, Medium Viscosity, Heavy Oil, DNAPL, Solar Powered, and Explosion ...


    By Abanaki Corporation

  • Abanaki Publishes Expanded Oil Skimming Solutions Sourcebook

    Second Edition Covers 40 Real-World Oil Skimming Applications.  CLEVELAND -Abanaki Corporation, the world leader in oil skimming and coolant maintenance products, announced the second-edition of its Solutions Sourcebook for oil skimming applications. The newly expanded 43-page handbook offers application notes and photos of 40 real-world implementations of oil skimming. Abanaki’s ...


    By Abanaki Corporation

  • 2001 Solinst Symposium a Forum for Learning and Sharing

    The 2011 Solinst Symposium proved to be another successful forum for attendees and presenters to discuss and share their ideas and experiences. This year's theme was "Enhanced Monitoring and Remedial Methods for Contaminated Groundwater". The event brought speakers from North American Universities, as well as practitioners from environmental consulting firms and remediation companies. One topic ...


    By Solinst Canada Ltd.

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