napl removal Articles

  • Impact of Non-Aqueous Phase Liquids (NAPLs) on Groundwater Remediation

    Nonaqueous Phase Liquids (NAPLs) are immiscible (undissolved) hydrocarbons in the subsurface that exhibit different behavior and properties than dissolved contaminant plumes. NAPLs have a tremendous impact on the remediation of contaminated aquifers, as it is very difficult or impossible to remove all of the NAPL from a hazardous waste site once released to the subsurface. Although many NAPL ...


  • Remediation of TCE NAPL in active Alleyway Arlington, Texas - Case Study

    Project Summary TRS Group, Inc. (TRS) completed a standard Fixed Price Remediation (SFPR) of trichioroethene (TCE) in soil in Arlington, TX using electrical resistance heating (ERH) in 2012, The system incorporated 19 electrodes with horizontal vapor recovery (VR) wells to treat a soil volume of approximately 4,155 cubic yards (yd3) located between two active buildings. Active ...


    By TRS Group, Inc.

  • Stabilizing the NAPL Threat: In-situ biogeochemical stabilization and flux reduction using catalyzed permanganate

    Nature of the problemNon-aqueous phase liquids (NAPLs) and other hydrocarbon residuals can represent long-term sources of groundwater contaminants. Excavation and disposal often represent the most rapid and effective means of removing these source materials from the environment. However, such an approach is not always physically possible, hence in-situ source area management strategies are ...


  • A mixed-integer non-linear programming with surrogate model for optimal remediation design of NAPLs contaminated aquifer

    A mixed-integer non-linear programming (MINLP) with surrogate model was introduced to derive the optimal surfactant enhanced aquifer remediation (SEAR) process (remediation cost minimisation and removal rate maximisation) at a nitrobenzene-contaminated site. First, a 3D multi-phase flow simulation model was developed to simulate the SEAR process; using a radial basis function artificial neural ...


    By Inderscience Publishers

  • Reactive core mat installed as NAPL control remedy at vermont superfund site case study

    Project: Pine Street Canal Superfund Site Location: Burlington, Vermont U.S.A. Products: Reactive Core Mat Organoclay Organic Adsorption Media Background: A manufactured gas plant operated at the Pine Street Canal site from 1895 to 1966. The plant disposed of wastes from the gasification process, including coal tars, which ...


    By CETCO

  • Measurement of NAPL–water interfacial areas and mass transfer rates in two-dimensional flow cell

    The nonaqueous-phase liquid (NAPL)–water interfacial area and the mass transfer rate across the NAPL and water interface are often key factors in in situ groundwater pollution treatment. In this study, the NAPL–water interfacial area and residual NAPL saturation were measured using interfacial and partitioning tracer tests in a two-dimensional flow cell. The results were compared with ...


    By IWA Publishing

  • Ft. Lewis, WA - Cost and performance report - Case Study

    IDENTIFYING DEFORMATION Site Name: East Gate Disposal Yard (EGDY) Location: Ft Lewis, Washington CERCLIS ID No: WA72100900670 ROD Date: September 25,1990 Technology: Electrical Resistance Heating Type of Action: Remedial, NAPL Area Source Removal TECHNOLOGY APPLICATION Period of Operation:   The periods for the ...


    By TRS Group, Inc.

  • Case study: Hunters Point

    In Situ Thermal Remediation with Gas Thermal Remediation (GTR©) is being used to remove NAPL contaminants from a former military base. The system is extracting nearly 1,000 liters of liquid waster every week. LNAPLs, such as fuel and oils, and DNAPLs, such as PCBs and chlorinated solvent, are being removed from the subsurface to make way for a residential homes. In Situ+NAPL ...

  • PaHs: Beazer East, Inc. - Denver, Colorado, USA

    Project In Situ Biogeochemical Stabilization (ISBS) of Creosote/Pentachlorophenol NAPLS Using Permanganate Summary A growing number of non-aqueous phase liquid (NAPL) removal technologies have been promoted commercially over the past few years, including: thermal-enhanced recovery, surfactant flooding, steam- and temperature-enhanced extraction and others. It is ...


  • In situ biogeochemical stabilization (ISBS) technology for source area

    Non-aqueous phase liquids (NAPLs) and other hydrocarbon residuals can represent long-termsources of ground water plume constituents of interest (COIs). Excavation and disposal oftenrepresents the most rapid, cost-efficient and effective means of removing these sourcematerials from the environment. In many cases, however, these types of remedial actions arenot possible / cost effective hence in ...


  • Hunters Point Case Study (In Situ Gas Thermal Remediation (GTR™))

    In Situ Thermal Remediation with Gas Thermal Remediation (GTR©) is being used to remove NAPL contaminants from a former military base. The system is extracting 378 liters (100 gallons) of liquid waste every week. LNAPLs, such as fuel and oils, and DNAPLs, such as PCBs and chlorinated solvents, are being removed from the subsurface to make way for a residential development. Three permits were ...


    By GEO Inc

  • Reactive mat used in creosote sediment cap remedy at a Portland superfund site case study

    Project: McCormick & Baxter Superfund Site Location: Portland, OR Products: Organoclay Reactive Core Mat Background: The former McCormick and Baxter Creosoting Company is located in Portland, Oregon on the Willamette River. This Superfund Site encompasses approximately 41 acres of land and an additional 23 acres of ...


    By CETCO

  • Progress Soil Sampling Results Collected from Phase 1 at SRSNE Superfund Site in Southington, Connecticut

    TerraTherm has recently completed its final progress soil sampling effort of Phase 1 at the Solvents Recovery Service of New England, Inc. (SRSNE) Superfund site in Southington, Connecticut. The site's total target treatment zone covers an area of approximately 74,195 square feet and an approximate volume of 47,298 cubic yards; with Phase 1 and Phase 2 each comprising approximately half the ...


    By TerraTherm, Inc.

  • Grade `A` remediation - selective phase transfer technology cleans up college in Moncton, New Brunswick

    Remedialing sensitive areas or population dense areas can be tricky at the best of times. So it's important to utilize a remediation technology with a proven record of reducing environmental and health and safely risks in order to avoid associated legal liability for project stakeholders, among other reasons. Ivey International Inc. is a Canadian company with offices in Campbell River, B.C., ...


    By Ivey International Inc.

  • 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.

  • Andover, Vapor Extraction and Refrigerated Condensation Case study

    Vapor Extraction and Refrigerated Condensation was used as a primary source removal technology to remediate high concentrations of recalcitrant chlorinated solvent compounds at the WDE Site in Minnesota. The use of Refrigerated Condensation has achieved high mass removal rates and will reduce the lifecycle costs and time of remediation. History 6,600 drums of hazardous ...

  • Surfactant enhanced bioremediation (SEB)

    Surfactant Enhanced Bioremediation (SEB®) using Ivey-sol® involve the use of Ivey-sol formulations which are patented non-ionic surfactant mixtures used in the in-situ and ex-situ treatment of petroleum hydrocarbons, heavy metals, and more recently radioactive type contaminated waste. These surfactant formulations have the ability to enhance soil biodegradation. During In-situ and Ex-situ ...


    By Ivey International Inc.

  • The Efficacy of Oxygen Release Compound - A Six-Year Review (PDF)

    Oxygen Release Compound (ORC®) is proprietary formulation of intercalated magnesium peroxide that releases oxygen slowly and facilitates the aerobic degradation of a range of environmental contaminants including petroleum hydrocarbons, certain chlorinated hydrocarbons, ether oxygenates and nitroaromatics. The history of ORC’s introduction and acceptance represents a model for the evolution of an ...


    By REGENESIS

  • Surfactant enhanced aquifer remediation (SEAR) using Ivey-sol surfactant technology

    This paper will focus on the application of Ivey-sol non-ionic surfactant technology to improve the in-situ remediation of petroleum hydrocarbon contamination is soil and bedrock aquifers. Normally hydrophobic organic chemicals (HOC) exhibit limited solubility in groundwater as the contaminants tend to partition onto the soil and bedrock matrix. This partitioning can account for as much as ...


    By Ivey International Inc.

  • Activated carbon mat utilized in subaqueous cap on major superfund site case study

    Project: Stryker Bay Location: Duluth, MN Products: GAC Reactive Core Mat® (GAC = Granular Activated Carbon) Background: Stryker Bay was heavily polluted from the late 1800s through 1962. The harbor area was ringed with tar and coke plants, heavy industry and slaughterhouses that all discharged industrial waste into the ...


    By CETCO

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