contaminant plumes Articles

  • Gaussian plume modeling of contaminant transport

    A technique for modeling contaminant transport based on Markov process theory is developed. Transport is quantified by summing the first two moments of independent random displacements and applying the central limit theorem (CLT) to obtain solute distributions of a Gaussian nature. For non-uniform flow fields the CLT is applied in a streamfunction/equitravel time space and transforms are used to ...


    By Springer

  • 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.

  • Bacteria devours gasoline plume

    The new environmental technology essentially flushes contamination out of the soil. NORTHAMPTON - With hungry bacteria and reusable carbon filters, an engineering company is slowly but surely removing a massive plume of gasoline from beneath a busy section of Pleasant Street. Traffic and business activity haven't had to skip a beat as Penney Engineering, of Mansfield, cleans up the ...


    By Penney Engineering, Inc

  • Comingled Plume? No Problem!

    CGRS Environmental Services and RPI Group Approved Installer, Vista Geoscience, were a bit surprised at what happened recently at a Denver hydrocarbon site they were remediating with Trap & Treat® BOS 200® injections. In late 2011, PCE contamination was also discovered (most likely coming from an upgradient dry cleaner). The client stated “The data shows that the BOS 200® ...

  • EHC® plume treatment for TCE and daughters, installed in 2008

    The Meteor Park Development, formerly the Delta Metals engineering facility (Figure 1), lies close to Birmingham city centre. In the years prior to 2006, development had been marginal due to spiraling remediation costs associated with significant impacts to site groundwater and soil. The lead consultant and remediation contractor (WSP Remediation Ltd.) adopted a combination of sustainable on-site ...


  • Emulsified-Oil Biobarrier Provides Long-Term Treatment of Perchlorate/VOC Plume

    Security Technology Certification Program (ESTCP) evaluation of a PRB containing emulsified oil substrate (EOS®). The pilot study was initiated in 2003 at the Alliant Techsystems, Inc., facility in Elkton, MD, to evaluate effectiveness of EOS technology for enhancing biodegration of perchlorate and chlorinated solvents. A single dose of low solubility, low viscosity, and slowly biodegradable ...


    By EOS Remediation, LLC

  • Plume distortion and apparent attenuation due to concentration averaging in monitoring wells

    This paper, authored by University of Connecticut researchers who performed much of the early work on this topic, describe the various processes that bias groundwater samples collected from conventional monitoring wells. In particular, they discuss the dilution of contaminants that occurs when clean water is simultaneously drawn into monitoring wells pumped to produce groundwater ...


    By Solinst Canada Ltd.

  • Successful Pilot Test Results in Full-Scale Treatment of Large BTEX Plume

    CASE SUMMARYRefueling Station – Algonquin, IL Leaking underground storage tanks at a refueling station resulted in a benzene, toluene, ethylbenzene and xylene (BTEX) plume in the underlying sand/gravel aquifer. The plume covered 1-acre and extended 390 feet downgradient from the source area, with a total BTEX concentration exceeding 24,000 parts per billion (ppb). In an ...


    By REGENESIS

  • 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 ...

  • A forensic study to differentiate two dissolved gasoline plumes at adjoining service stations

    Three gasoline service stations are present at a highway intersection in central New Jersey. In the mid- to late- 1980s, service station “B” began to notice large discrepancies in their gasoline inventory. The USTs were removed in 1988 and a significant release was discovered. Separate-phase gasoline, as much as 1.5 feet (0.5 m) thick was present on the water table for about an area ...


  • Co‐occurrence of 1,4‐dioxane with trichloroethylene in chlorinated solvent groundwater plumes at US Air Force installations: Fact or fiction

    Increasing regulatory attention to 1,4‐dioxane has prompted the United States Air Force (USAF) to evaluate potential environmental liabilities, primarily associated with legacy contamination, at an enterprise scale. Although accurately quantifying environmental liability is operationally difficult given limited historic environmental monitoring data, 1,4‐dioxane is a known constituent (i.e., ...


    By John Wiley & Sons, Ltd.

  • API Bulletin: Characteristics of Dissolved Petroleum Hydrocarbon Plumes: Results From Four Studies.

    Abstract Recent studies of over 600 groundwater contamination sites throughout the U.S. provide important information regarding the fate and transport of petroleum hydrocarbons in the subsurface. This API research summary examines the findings of four independent research studies and ...


  • EOS Permeable reactive barriers successfully treat a large Trichloroethene plume - Case Study

    Historical use of trichloroethene (TCE) and other chlorinated solvents at a former au-tomotive parts manufacturing plant in Indiana resulted in a large groundwater plume, stretching approximately 2 miles from the site. TetraTech GEO evaluated sev-eral remedial alternatives and selected enhanced in situ bioremediation to reduce contaminant concentrations and eliminate continued plume migration at ...


    By EOS Remediation, LLC

  • Application of Passive Soil Gas Technology to Determine the Source and Extent of A Pce Groundwater Plume in an Urban Environment

    Abstract In situations where groundwater supplies have been impacted by volatile organic compounds, such as perchloroethylene (PCE,) and the source has not been identified, the costs to identify the source and plume migration patterns may be extremely high. The costs for an investigation increase with the number and depth of borings and the number of samples that are collected and analyzed. ...

  • Case study – condensate-1 contamination

    Site: Natural Gas Compressor Station Contaminant: BTEX Soil Type: Sandy Clays Injection Cost: $60,000 (material & labor) Plume Size (before): 6600 sq. ft. Thickness: 3 feet (18 to 21 feet bgs) Plume Size (after): ~250 sq. ft. Groundwater: 18 to 20 feet ...

  • 3-D Microemulsion (3DMe)™ Superior Distribution: Cost-Effective Treatment of Large Plumes

    3-D Microemulsion (3DMe)™, a form of HRC Advanced®, is the current state-of-the-art in slow-release electron donor products for the in-situ treatment of chlorinated solvents in groundwater. By employing a sequential, staged release of hydrogen, 3DMe provides an immediate and long-term release of hydrogen for enhanced longevity. Equally as important is the compound’s unique self-distribution ...


    By REGENESIS

  • KB-1® Bioaugmentation for Source Area Treatment and Downgradient Plume Biobarrier Application

    ProblemA trichloroethene (TCE) release at the site in the early 1980’s led to concentrations of TCE and cis-1,2-dichloroethene (cDCE) as high as 592 and 90 milligrams per liter (mg/L), respectively, in the source area, where dense non-aqueous phase liquid (DNAPL) was suspected to be present. The downgradient plume had concentrations of TCE, cDCE, andvinyl chloride (VC) as high as 2, 34, and ...


    By SIREM

  • Case study – condensate-2 contamination

    Site: Compressor Station Contaminant: Condensate (benzene) (LNAPL/free product present) Soil Type: Silty Clays Initial Design Reduce plume size by about 66% and Objective: concentrations in hot zone to 20 to 25 ppm Injection Cost: $76,000 (material & labor) Plume Area (before): approximately 12,000 sq. ft. (3200 sq. ft. inside building) Thickness (2 depths): Shallow - 10 to ...

  • Case study – BTEX contamination - Colorado

    Site: Former Gas Station (Colorado) Contaminant: BTEX Soil Type: Silty Clays Injection Cost: $8,500 (material & labor) Treatment Area (before): approximately 400 sq. ft. Thickness: 16 to 22 feet bgs Plume Area (after): All contaminates are below groundwater standards Groundwater: varies from 16 to 18 feet ...

  • CH#952 - Oil Contaminated Soil

    SITE OWNER: A National Overnight Express Package Company SITE SURVEY: Site and geological surveys revealed a contaminated area north of the facility and west of a diesel tank pit. The cause of the contamination was the result of two (2) underground storage tanks (UST™). One tank contained waste oil while the other contained new oil. Both tanks had ...


    By BIO-SYSTEMS International

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