groundwater monitoring technology Articles

  • Comparative Effects of HRC Application at Four Project Locations (PDF)

    Four site locations in the Southern or Midwest United States were the venues for pilot testing of a commercially available injectable bioremediation product (HRC™) to enhance the reductive dechlorination of chlorinated solvents. This activity occurred from 1997 through the end of 2000. Prior to injection, each site exhibited bioattenuation of parent compounds such as PCE, TCE, carbon ...


    By REGENESIS

  • Closures of mine a new challenge for Romania

    AbstractThe mining activity is one of the oldest activity in Romania, dating from the year 100 B.C. The gold and silver ores represented one of the riches of our country. In time the economic content of metals diminuend, and the ore mines become non profitable. Due to this situation the best option of the State was the closure and ecological rehabilitation of the mines.The steps for the ...


  • Passively Enhanced in Situ Biodegradation of Chlorinated Solvents.

    INTRODUCTION Harding Lawson Associates (HLA) conducted a field demonstration to evaluate in situ enhanced anaerobic biodegradation of chlorinated solvents using Hydrogen Release Compound (HRC). The technology is designed to enhance the natural biodegradation process for a more rapid and complete degradation of the organic contaminants to non-toxic compounds (e.g., ethylene). This paper presents ...


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  • Oxygen Release Compound - Canada Case Study

    EHC-O Oxygen Releasing Compound - ES&E Magazine (May 2007) A whimsical comment by the author Michael McClary compels one to realize that more intuitive processes can be overlooked when considering technology’s abilities to improve our natural environments. He said: “Irrigation of the land with seawater desalinated by fusion power is ancient. It’s called rain.” In situ treatment of ...


  • Reductive Dechlorination Using HRC Reduces VOCs Towards MCLs

    Site Summary As part of the EPA Superfund Innovative Technology Evaluation (SITE) program, a pilot-scale study was conducted to determine the effectiveness of using HRC to reduce TCE concentrations in groundwater at the Fisherville Mill site in Grafton, MA. The Fisherville site is characterized by TCE contamination in a sand and gravel aquifer and is considered a brownfield site. Prior to HRC ...


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  • Results of the Application of Enhanced Reductive Dechlorination of Chlorinated Organics at Eight Sites (PDF)

    Enhanced reductive dechlorination is becoming more widely evaluated as a technology for the remediation of chlorinated organic compounds. The performance of this technology as reported in the literature, is often quite variable, making it difficult to evaluate the applicability of the technology. CH2M HILL has been involved in the application of this technology at several sites over the past few ...


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  • A Pilot Scale EZVI and ZVI Treatment of Unsaturated and Saturated Soil for TCE Reduction

    ABSTRACT: Enhanced biological reductive dechlorination, micro-scale zero valent iron (ZVI), and emulsified zero valent iron (EZVI) injections were implemented to treat chlorinated volatile organic compounds (CVOCs) at a former manufacturing facility in western South Carolina.  These remedial approaches – until recently typically implemented as standalone technologies –were ...

  • Hydraulic “Fracking”: Are surface water impacts an ecological concern?

    Use of high‐volume hydraulic fracturing (HVHF) in unconventional reservoirs to recover previously inaccessible oil and natural gas is rapidly expanding in North America and elsewhere. Although hydraulic fracturing has been practiced for decades, the advent of more technologically advanced horizontal drilling coupled with improved slickwater chemical formulations has allowed extensive natural ...


    By John Wiley & Sons, Ltd.

  • Water Corporation

    Introduction the Water Corporation was established under statute as a corporatized entity. The mission of the Water Corporation is to conduct a successful business providing quality water and wastewater services to customers to enhance their lifestyle and to support the future development of the State. Asset Monitoring Services was established within the Corporation to undertake data ...


    By KISTERS AG

  • Case study - An air/ozone Sparge curtain to protect a municipal supply well

    Description Releases of petroleum contaminants from a retail gasoline station in a medium-sized California Central Valley town threatened a municipal supply well immediately adjacent and approximately 200 ft downgradient to the station. Methyl tert-butyl ether (MTBE) was present in groundwater concentrations up to 30,000 micrograms per liter (µg/L) and GRO up to 33,000 ...

  • Turbidity Warning System

    Morgan Est Contractors for National Grid Supply and installation of telemetred groundwater monitoring network, May 2006 ongoing Hydro-Logic recently completed the supply and installation of borehole instrumentation and a telemetry monitoring system to monitor groundwater conditions in 28 observation wells located at 19 sites in the vicinity of Croydon. The ...

  • Owosso MI - Guaranteed PCE remediation under active restaurant - Case Study

    First Michigan state-funded cleanup using electrical resistivity heating technology and a guaranteed project. Background The site is a former dry cleaner that had operated for more than 20 years. The dry cleaning operations left residual perchloroethylene (PCE) contamination in the soil and groundwater and a building was constructed on the site without ...


    By TRS Group, Inc.

  • Stevens Systems Enhances Ground Water Remediation Effectiveness

    The Stevens Hydra Probe is now being used to monitor the progress of a new groundwater pollution clean up method called phytoremediation. Phytoremediation is the method by which trees are used to pull contamination out of groundwater. Remediation of contaminated aquifers can take many years to complete. The need for clean, healthy rivers, lakes and streams has stimulated research to develop ...

  • Treatment of a mixed CVOC and cr contaminated site using in situ chemical reduction (ISCR) and Stimulated Biotic Mineralization

    The implementation of efficient and cost-effective remedial solutions in the clean-up of impacted properties is paramount in returning brownfields and other impacted properties to viable use in the face of the recent real estate market declines. Historical site use of the Cleveland Flats project area included: a manufactured gas plant (circa. 1850), trucking terminal, & plating operations. As ...


  • Case study - Rapid removal of chloroethenes at industrial sites

    Description Air sparging with trenches had failed to remove groundwater and soil contamination at an industrial Superfund site in Piedmont soils in South Carolina.  The major contaminants of concern were cis 1,2-dichloroethene (DCE) and trichloroethene (TCE) ranging from 0.5 to 2.0 mg/L.  The treatment area was approximately 15,000 square feet. Ozone sparging was ...

  • Former textile manufacturing facility DNAPL source zone green ERD Remediation Cannon Knitting Mills, Hamilton, Ontario Canada case study

    Project Highlights ERDENHANCED PRS Pilot Study >99.6% reduction in PCE concentrations in 7-months. ERDENHANCED PRS PILOT STUDY >95% reduction in TCE >81% reduction in cis-DCE ERDENHANCED >93% reduction in PCE molar mass during evaluation period ERDENHANCED program sponsored by City of Hamilton and Ministry of Environment ...

  • 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

  • Installation of a grout curtain at a hazardous waste landfill

    Abstract: An existing inactive hazardous waste landfill located in Niagara Falls, New York was exhibiting migration of contaminants due to lateral groundwater flow in the underlying dolomitic limestone bedrock. It was determined that the installation of a vertical barrier to redirect the groundwater flow around the landfill would be the key element in the abatement design. Further review ...


    By Geo-Con, Inc.

  • Failure of Magnesium Peroxide to Remediate Petroleum Hydrocarbon-Contaminated Sites (PDF)

    Researchers promote magnesium peroxide as a viable method to aerobically bioremediate petroleum hydrocarbons and restore groundwater quality. Suppliers claim that dissolved oxygen released in the saturated zone promotes biological growth for degrading a wide range of hydrocarbons dissolved in water and sorbed onto soil particles. Yet, staff with the CaliforniaRegional Water Quality Control Board, ...


    By REGENESIS

  • Successful Biostimulation Treatment of TCE DNAPL

    The challenges posed by the presence of DNAPL are rooted in the unpredictable manner in which it spreads and moves through the subsurface, and the fraction of total contaminant mass it represents in an associated groundwater plume via sorbed, residual and drainable phases (typically greater than 99 percent). Under natural conditions, the dissolution of DNAPL is very slow, allowing groundwater ...


    By Arcadis

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