chlorinated solvent Articles

  • Chlorinated solvents

    The initial PSG survey identified TCE source areas that did not agree with the GPR survey findings. Based on these results, a subsequent PSG survey was performed to further characterize the site and better define the source areas identified in the initial survey. Analytical results were provided to the client within four (4) days of receipt of samples at the laboratory for both surveys. The ...

  • Dr. Leo Lehmicke, a nationally recognized microbiologist in the area of bioremediation, has joined Hargis + Associates, Inc.

    Dr. Leo Lehmicke, a nationally recognized microbiologist in the area of bioremediation, has joined Hargis + Associates, Inc. His specific area of expertise is natural attenuation and enhanced bioremediation of chlorinated solvents. He helped develop and was an instructor for a course on Natural Attenuation of Chlorinated Solvents that was given to EPA and State regulators around the country. Dr. ...


    By Hargis + Associates Inc

  • Bioaugmentation and Biostimulation Create Conditions for Successful Site Remediation

    CASE SUMMARY Dry Cleaning Operations, Coral Springs, FL A subsurface chlorinated solvent plume formed as the result of dry cleaning operations and migrated beneath an onsitestructure. Over a 6-month period, the concentration of chlorinated solvents increased from 6,000 to 15,000 partsper billion (ppb). A low-cost, in-situ remedial strategy was sought to treat the ...


    By Regenesis

  • North LA Case Study (C3 Technology)

    The project site is an industrial facility located in the foothills of northern Los Angeles, California. The facility utilized chlorinated solvents in operations. 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 ground surface (bgs). Groundwater was encountered at the site at ...

  • Environmental forensics investigation

    Location: Vancouver, BC Owner: Confidential Description: Environmental forensics investigation ongoing to determine the source of chlorinated solvents (PCE, TCE, 1,1,1-TCA1,1,DCE) and 1,2-dichlorobenzene contamination at a site that has changed owners in the past 25 years. Advanced Forensic Techniques used include hydrolysis equation for ...


    By NovaTec Consultants 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 ...

  • Impact of 1,4-Dioxane from Domestic Effluent on the Agano and Shinano Rivers, Japan

    1,4-Dioxane is a polar and low-biodegradable organic compound. It is used as an industrial solvent or solvent stabilizer that prevents the breakdown of chlorinated solvents during manufacturing processes (Zenker et al. 2003). Industrial solvents are used in decreasing, electronics, metal finishing, fabric cleaning, pharmaceuticals, herbicides and pesticides, anti freeze, paper manufacturing and ...


    By Springer-Verlag GmbH

  • Aerobic Cometabolism of Halogenated Aliphatic Hydrocarbons: A Technology Overview

    Untitled Document Abstract Bioremediation of chlorinated solvents has been moving from an innovative to ...


    By CL Solutions, LLC

  • Enhanced Bioremediation of Chlorinated Solvents (PDF)

    Enhanced in situ bioremediation of chlorinated solvents in groundwater has been successfully demonstrated at many sites by supplying lactic acid as an electron donor. The source of lactate for these successful pilot tests is Hydrogen Release Compound (HRC), a polylactate ester specially formulated for slow release of lactic acid upon hydration. HRC has been delivered to chlorinated ...


    By Regenesis

  • Protocol for Enhanced In Situ Bioremediation Using Emulsified Edible Oil

    An in-depth discussion of the EOS® patented technology and its usefulness for site remediation is presented. Details of how the technology works, design considerations as well as strengths and limitations of the technology are presented. 1.1 INTRODUCTION Management of groundwater contaminated with chlorinated solvents, perchlorate, and explosives is one of the Department of Defense’s (DoD’s) ...


    By EOS Remediation, LLC

  • HRC® Reduces Chlorinated Hydrocarbon Contamination in a Complicated Geological Setting

    CASE SUMMARY Textile Facility, Northern France A subsurface plume of mixed chlorinated solvents developed as the result of historical operations at a textiles facility in Northern France. The plume was approximately 1,000 square meters in size. The complicated geology consisted of a gravelly silt (highly contaminated) overlying a silty sand (medium contamination) ...


    By Regenesis

  • 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 ...

  • Project - Tank Barge Degassed

    PURGIT has the correct equipment and experience to degas tank barges Case history Methylene chloride Recovered 325 gallons—about 1583 pounds or clean condensate by pulling vapors from the vessel liquid line. We condensed the chlorinated solvent and returned the non-condensables to the same tank through the vapor line in a closed ...

  • The advantages and benefits of aerobic cometabolism

    Aerobic metabolism yields the energy-transferring molecule TPA at a much higher rate than anaerobic metabolism. The higher energy yield produces a greater viable population. The oxygenase enzymes involved in the cometabolism of chlorinated solvents are not induced by the presence of contaminants, so a high microbial population has a proportionately high yield of oxygenase enzymes. Aerobic ...


    By CL Solutions, 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

  • Design tool for estimation of buffer requirement for enhanced reductive dechlorination of chlorinated solvents in groundwater

    To assist in the design of enhanced reductive dechlorination systems for in situ remediation of chlorinated solvent source zones, the software BUCHLORAC (BUffering of deCHLORination ACidity) was developed to predict the amount of buffer required to maintain the groundwater pH in a DNAPL treatment zone within the optimal range for dechlorinating bacteria. Reductive dechlorination is an acidforming ...


    By True Blue Technologies, 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 ...


    By EOS Remediation, LLC

  • 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 ...

  • Technical Bulletin: c-DCE stall out

    Trichloroethene (TCE) and Perchloroethene (PCE) chlorinated solvents have been responsible for the serious contamination of soils and groundwater. The occurrence of cis-DCE “stall”, the condition of where it appears biodegradation beyond cis-DCE to vinyl chloride does not occur resulting in cis-DCE accumulation, is often misinterpreted. How do you know if your site has c-DCE “Stall”?1) Evaluate ...

  • Grid and Barrier Treatment Reduces Chlorinated Solvent Contamination

    CASE SUMMARY Manufacturing Facility, Dallas, TX Subsurface investigations at this manufacturing facility revealed chlorinated solvent contamination in the groundwater. The contaminant plume contained significant levels of dichloroethene (cis-DCE) and vinyl chloride (VC) from the natural attenuation of tetrachloroethene (PCE) and trichloroethene (TCE). Well MW-9 contained ...


    By Regenesis

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