contaminant migration Articles

  • Organic compounds migrating from plastic pipes into water

    Case studies were carried out to identify potential chemical contaminants migrating to drinking water from polyvinyl chloride (PVC) or polyethylene (PE) pipes, available on the Polish market. Analyses were carried out by gas chromatography (GC) coupled with mass spectrometry (MS). Analysis of organotin compounds in water in contact with PVC pipes from different manufacturers found variability: ...


    By IWA Publishing

  • Contaminant migration in unsaturated porous media using X-ray computerized tomography (CT)

    Landfills are usually located in unsaturated zones. Contaminant leaking can easily infiltrate groundwater through these porous media and contribute to groundwater pollution. The main objective of this work is to study the leachate migration in unsaturated porous media using X-ray computerized tomography (CT) and image-processing software. Silica sand and Yamazuna sand (collected from Japan) with ...


    By IWA Publishing

  • A finite layer technique for calculating three-dimensional pollutant migration in soil

    A technique for the analysis of two— and three—dimensional pollutant migration through a layered soil medium is described. An earlier solution for plane diffusion in a single homogeneous layer of soil is extended using the finite layer method for general three-dimensional diffusion. Particular attention is focused on the effects of horizontal advective velocity and coefficient of hydrodynamic ...


    By GAEA Technologies Ltd.

  • Confined aquifer responses to pumping – potential impacts on plume migration

    Pressure waves are transmitted in confined aquifers with relatively little damping compared with surficial phreatic aquifers. Confined aquifers may therefore be subject to abrupt and far-reaching changes in the rate and direction of groundwater flow due to changes in well pumping. Where there is a mechanism for contaminants to reach a confined aquifer, the contaminant migration within the aquifer ...

  • Proven protection against petroleum gas and water migration case study

    Project : 500 Fifth Avenue Nort|h Location : Seattle, WA Products : Liquid Boot® Gas Vapor Mitigation System, Ultraseal® Waterproofing System Background: Vapor intrusion has become a signifi cant environmental issue for regulators, industry leaders, and concerned residents nationwide. The use of a spray-applied gas ...


    By CETCO

  • A model to resolve the dynamics of organochlorine pharmacokinetics in migrating humpback whales

    Humpback whales are iconic mammals at the top of the Antarctic food chain. Their large reserves of lipid rich tissues such as blubber predispose them to accumulation of lipophilic contaminants throughout their lifetime. Changes in the volumes and distribution of lipids in humpback whales, particularly during migration, could play an important role in the pharmacokinetics of lipophilic ...


    By John Wiley & Sons, Ltd.

  • Jet Grouting in contaminated soils

    Abstract The jet grouting technique has gained wider acceptance in the U.S. over the past few years as a viable tool for such geotechnical applications as the improvement of foundation soils, slope stabilization, and underpinning (Welsh and Burke, 1991). Jet grouting; however, has recently been used as a method of performing block stabilization of contaminated soils as well as for the ...


    By Geo-Con, Inc.

  • Mineral oil contaminations in cardboard

    SpeedExtractor E-916: Optimization of pressurized solvent extraction (PSE) for the rapid and efficient determination of MOSH and MOAH in cardboard Many food samples are often contaminated with mineral oil coming from different sources. One possible source of contamination is the migration from cardboard packaging made of recycled fibres. ...


    By BÜCHI Labortechnik AG

  • Groundwater and contaminant transport modelling

    Client: Nuclear Industry Location: Cumbria, UK Services: Radioactive waste consultancy, hydrogeological risk assessment Issues: Potential risk to groundwater, environment and human health. System conceptualisation Summary: ESI developed a FEFLOW finite element model of the groundwater system in the ...

  • Properties and Behavior of Inorganics in Contaminated Soil

    Often, specific technologies may be ruled out, or the list of potential technologies may be immediately narrowed, on the basis of the presence or absence of one or more of the chemical groups. The relative amounts of each may tend to favor certain technologies. Metals may be found in the elemental form, but more often they are found as salts mixed in the soil. At the present time, treatment ...

  • Mineral oil contamination in dry food samples

    SpeedExtractor E-916: Optimization of pressurized solvent extraction (PSE) for the rapid and efficient determination of MOSH and MOAH in dry food samples Many food samples are contaminated with mineral oil coming from different sources. One possible source of contamination is the migration from cardboard packaging made of recycled fibers. Other sources of contamination with mineral oils ...


    By BÜCHI Labortechnik AG

  • Case study – BTEX contamination pilot study - gasoline

    Site: Convenience Store – Pilot Study Contaminant: BTEX (gasoline) Soil Type: Silty Clays Injection Cost: $24,000 (material & labor) Plume Size (before): 1150 sq. ft. Thickness: 8 feet (14 to 22 feet bgs) Plume Size (after): Contamination only exists at edge near heavily contaminated, untreated areas. Groundwater: About 16 feet bgs Goals: The intent of ...

  • Combining HVME and Enhanced Bioremdiation for Gasoline Contamination in Groundwater.

    ABSTRACT A leaking underground storage tank at a commercial petroleum retail site located in Haskell, Texas resulted in soil and groundwater petroleum hydrocarbon contamination. This contamination, including benzene, toluene, ethylbenzene, and total xylenes (BTEX) and total petroleum hydrocarbons (TPH) migrated down-gradient below a road and neighboring property. Access below the adjacent roadway ...


    By REGENESIS

  • Soil Contamination and Possible Threats to Human Health

    In 2007, the city of Salisbury, North Carolina, purchased a piece of land that was the location of a former service station. The property had been given a clean bill of health in 1991 and again in 2007 just before the property was purchased. Last year, the city began site preparations to build a new central office for the local schools when soil contamination was found. It turns out ...


    By EMSL Analytical, Inc.

  • Groundwater Contamination Plume Remediation - Case Study

    19 CMT Multilevel Systems Successfully Installed in Challenging  A facility in Pontypool, Wales, UK was once the location of a plastic forming plant. Over time, chemicals produced through the plastic forming processes were lost into the groundwater beneath the facility, creating a large contaminant plume. Years later it was determined that the plume is ...


    By Solinst Canada Ltd.

  • Edible Oil Barriers for Treatment of Perchlorate Contaminated Groundwater

    An EOS® biobarrier was designed and implemented to remediate perchlorate contaminated groundwater. The report describes the site characterization, design steps, implementation, monitoring results and lessons learned from this effective remedial approach. EXECUTIVE SUMMARYThis final technical report documents the demonstration of emulsified edible oils for remediation of perchlorate in ...


    By EOS Remediation, LLC

  • Groundwater contamination of 1,1,1-TCA, PCE - Manufacturing facility

    LOCATION:  Glen Cove, New YorkPROJECT DATE:  September 2000 to presentCLIENT:  Confidential BACKGROUND: Groundwater in a sand and gravel aquifer beneath this active manufacturing facility was contaminated with 1,1,1-TCA (concentrations up to 480 mg/L), PCE, and their degradation products. The site owner, faced with a long term (in excess of 100 years) and expensive pump and treat ...


    By Terra Systems, Inc. (TSI)

  • Contamination by mercury of groundwater of the North Numidian zone of Azzaba, North East Algeria. Effect of inorganic mercury contamination of population

    The mercury ore deposit of Azzaba is located on the northern flank of the limestone chain, south of Azzaba town, North East Algeria. Nineteen springs and wells from the two aquifers were sampled for chemical analyses. Water of the Oligocene aquifer shows high Hg contents (up to 80 (g.L−1) whereas in the deep aquifer, Hg contents do not exceed 7 µg.L ...


    By Inderscience Publishers

  • Combining HVME and Enhanced Bioremediation for Gasoline Contamination in Groundwater

    A leaking underground storage tank at a commercial petroleum retail site located in Haskell, Texas resulted in soil and groundwater petroleum hydrocarbon contamination. This contamination, including benzene, toluene, ethylbenzene, and total xylenes (BTEX) and total petroleum hydrocarbons (TPH) migrated down-gradient below a road and neighboring property. Access below the adjacent roadway was ...


    By REGENESIS

  • Indoor Air as a Source of VOC Contamination in Shallow Soils Below Buildings

    US EPA and many state regulatory agency guidance documents recommend below foundation vapor sampling as a key element of site investigations to determine if vapor migration from underlying soil into buildings is a completed exposure pathway (USEPA, 2002; WIDHFS, 2003; San Diego County, 2004; PADEP, 2004). If volatile organic compounds (VOCs) are detected below the building foundation, then VOC ...


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