Chlorinated Solvents Articles

  • Case study - Dual-reagent ISCO “Fast-Tracks” cleanup of Orlando Brownfield

    Description: A Brownfield property impacted with chlorinated solvents was the planned location for the home of the Orlando Magic basketball team. Contaminants: Chlorinated solvent contamination was present in soil and groundwater with PCE concentrations greater than 14,000 ug/L and potential presence of DNAPL. Remedial challenge: The ...

  • Evaluation of DBPs formation from SMPs exposed to chlorine, chloramine and ozone

    Soluble microbial products (SMPs) are an important group of components in wastewater effluents. In this study, the formation of disinfection by-products (DBPs), including trihalomethanes (THMs), haloacetic acids (HAAs), chlorinated solvents (CSs), haloketones (HKs), haloacetonitriles (HANs) and trichloronitromethane (TCNM) (chloropicrin), from SMPs during chlorination, chloramination and ...


    By IWA Publishing

  • Practitioner Spotlight--Dan Keltner

    Name Dan Keltner Office Naperville, IL (Chicago) Practice Area Transaction Support Areas of expertise ...


    By Antea Group - USA

  • PlumeStop Pilot Study: Former Dry Cleaner – Marina, CA, USA; Rapid Solvent Treatment to Non-detect – Degradation Lines of Evidence

    Approach A beta-test pilot evaluation of PlumeStop™ performance was conduced on chlorinated solvent groundwater contamination at a former dry cleaner site. PlumeStop was applied in conjunction with the slow-release electron donor, HRC® and the microbial bioaugmentation dechlorinator inoculum, BDI® for the treatment of residual PCE (550 μg/L). The test was conducted around a ...


    By REGENESIS

  • Raynesway resource park - Case Study

    The Raynesway Resource Park is a 35 hectare site bounded on three sides by the River Derwent. The southern half of a former chemicals plant, soils and groundwaters were impacted by chlorinated solvents, acid tars, hydrocarbons and ammoniacal sludges. Celtic designed a sophisticated groundwater treatment system, integrating air sparging, multi-phase extraction and chemical oxidation to address ...


    By CELTIC Technologies Ltd

  • Performance of DNAPL source depletion technologies 2 at 59 Chlorinated solvent-impacted sites

    Abstract Performance and rebound of intensive source depletion technologies were evaluated at 59 chlorinated solvent sites where remediation targeted dense non-aqueous phase liquid (DNAPL) source zones. The four technologies included in the study are chemical oxidation, enhanced bioremediation, thermal treatment, and surfactant/cosolvent flushing. Performance was evaluated by examining ...


    By TRS Group, Inc.

  • In Situ Bioremediation of Chlorinated Solvents

    ABSTRACT: In situ bioremediation is ongoing at a former manufacturing facility in Portland, Oregon.  Shallow groundwater at the site was impacted by chlorinated solvents, primarily trichloroethene and degradation products cis-1,2-dichloroethene and vinyl chloride.  In situ chemical oxidation treatment was completed in 2003 via the injection of sodium permanganate in source ...


    By EOS Remediation, LLC

  • CL-Out In Situ Bioremediation of Perchlorate

    CL-Out is a consortium of facultative aerobic organisms that are well know for their ability to utilize nitrates.  CL-Out is generally used for the aerobic cometabolism of PCE and other chlorinated solvents.  As the half-reaction for perchlorate is close to that of nitrate, CL-Out cometabolism of perchlorate was successfully tested in the laboratory.  In addition to laboratory ...


    By CL Solutions, LLC

  • 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.

  • Source area bioremediation of chlorinated solvents with edible oils emulsion

    Groundwater in a sand and gravel aquifer beneath this active manufacturing facility was contaminated with high concentrations of 1,1,1- Trichloroethane (1TCA) and cis-1,2-dichloroethene (cDCE), and their degradation products including ethene and ethane. An acclimated anaerobic microbial population was present at the site, but was limited by the availability of carbon. Emulsified edible oil was ...


    By Terra Systems, Inc. (TSI)

  • 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 ...


  • Bioaugmentation Following ISCO Treatment

    CL-Out bioaugmentation was implemented following ISCO treatment of TCE-contaminated ground water.  Through bioaugmentation the ground water remediation was complated and ground water conditions were restored in 30 days. Background The chlorinated solvent trichloroethylene (TCE) was discovered in ground water at a manufacturing facility in eastern Massachusetts. ISCO was selected for ...


    By CL Solutions, LLC

  • pH control for enhanced reductive bioremediation of chlorinated solvent source zones

    Enhanced reductive dehalogenation is an attractive treatment technology for in situ remediation of chlorinated solvent DNAPL source areas. Reductive dehalogenation is an acid-forming process with hydrochloric acid and also organic acids from fermentation of the electron donors typically building up in the source zone during remediation. This can lead to groundwater acidification thereby ...


    By True Blue Technologies, Inc.

  • Acidity production and buffer requirements for in situ bioremediation of chlorinated solvents

    Acidity production and buffer model Developed batch abiotic model in PHREEQC-2 using overall stoichiometry for reductive dechlorination Reaction is divided in steps, buffer is added as required to maintain minimum design pH Model considers: Expected extent of dechlorination Site water chemistry H2 ...


    By True Blue Technologies, Inc.

  • Petroleum hydrocarbon and chlorinated solvent case study

    Project Description The site is an active fueling terminal located in Van Nuys, California USA. The site has 1underground storage tanks of petroleum fuel as well as numerous above ground storage tanks for containment of various hydrocarbon and chlorinated solvent compounds. Site Geology Soils at the location consist primarily of interbedded layers of silt, ...


    By GEO Inc

  • Industrial facility with chlorinated solvents

    Project Description The project site is an Industrial facility located in the foothills of northern Los Angeles, California. The facility utilized chlorinated solvents in operations. Site Geology Based on soil borings site geology consisted of unconsolidated gravely sands, sand, silty sand, sandy silt, and silt from ground surface to more than 200 feet below ...


    By GEO Inc

  • Chlorinated solvents: methylene chloride and TCE

    Introduction This paper presents the results of a scaled and phased approach to source remediation of high concentrations of recalcitrant chlorinated solvent compounds via soil vapor extraction (SVE) and vapor treatment at a Site in Southern California. Phase I began with refrigerated condensation (C3) in order to achieve high mass removal rates to reduce lifecycle costs and time ...

  • Landfill remediation with refrigerants and chlorinated solvents

    PROJECT DESCRIPTION Between 1979 and 1980, industrial and hazardous wastes were disposed of at the Site in a series of unlined pits, each of which was used for a particular type of waste disposal. It is reported based on evaluations of manifests that approximately 3.4 million gallons of hazardous liquid wastes and between 3,700 and 4,100 tons of solid wastes were disposed of in the pits ...


    By GEO Inc

  • Generation of Enriched, Anaerobic "Chase Water" to Repair Aquifer Biogeochemistry

    Understanding of the Problem “DCE Stall” is a problem frequently encountered when simple, “carbon-only” substrates such as hydrogen releasing compounds, emulsified oils, lactates or sugars are used to stimulate in situ reductive dehalogenation of chlorinated solvents. In response to the excessive accumulation of these problematic intermediates (e.g., ...


  • Editor’s perspective - solvent cleanup standards

    Risk-assessment science is a critical tenet of the remediation industry, as it is the underlying basis of the majority of cleanup work performed. However, risk-assessment science is, for the most part, poorly understood by a large portion of environmental professionals. Most seasoned professionals understand the basic risk-assessment concepts related to the dose-response and exposure duration ...

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