Groundwater Monitoring Articles

  • Accelerating Aerobic Biodegradation of GRO/DRO: A Five-Year Study (PDF)

    Gasoline Range Organics (GRO) and Diesel Range Organics (DRO) contaminated the aquifer underlying a warehouse/equipment storage facility in Homer, AK. This contamination originated from leaks in underground storage tanks located in the northern section of the site. Groundwater flow at the site is controlled in large part by a finger drain running through the facility. This finger drain, cut four ...


    By Regenesis

  • Importance of discrete-zone monitoring systems in fractured-bedrock wells -- A case study from the University of Connecticut landfill, Storrs, Connecticut

    Monitoring of hydraulic head is an important part of many hydrogeologic investigations because it is used to determine the rates and directions of ground-water flow. In unconfined aquifers, open-hole water levels can be used to establish meaningful conceptual models of ground-water flow. In heterogeneous fractured-rock aquifers, however, where the hydraulic head can be different for each fracture ...


    By Solinst Canada Ltd.

  • Vinyl Chloride Attenuation By Direct Injection of Time-Release Magnesium Peroxide.

    ABSTRACT: This case study shows that there is potential to remediate dissolved vinyl chloride by oxygenation in the field. Residual vinyl chloride concentrations have been remediated in the field at a mid-western site with a phosphate-intercalated peroxygen (ORC®, a proprietary formulation of magnesium peroxide that releases oxygen slowly). The site was formerly operated as an aluminum coating ...


    By Regenesis

  • Groundwater Remediation at Low Flow/Low Permeability Sites using HRC

    Rocky Flats Environmental Technology Site (RFETS) is located near Golden, Colorado. A groundwater plume of tetrachlorethene (PCE) and other volatile organic compounds (VOCs) developed at the PU&D Yard site as a result of prior spills at this location. A treatability study evaluated the effectiveness of the Hydrogen Release Compound (HRC®) in low-flow groundwater regimes. HRC is a proprietary, ...


    By Regenesis

  • Aerobic and Anaerobic Bioremediation of 1,1-DCE and Vinyl Chloride in Groundwater

    Untitled Document A three-tiered remediation approach is being used for successful field treatment of a 1,1- dichloroethene (1,1-DCE) groundwater plume. The plume is characterized by ...


    By Regenesis

  • Reductive Biotransformation of Explosives Compounds in Groundwater

    Untitled Document ABSTRACT: Earth Tech Inc. has successfully completed two bench-scale studies demonstrating the treatment of explosives contaminated groundwater by ...


    By Regenesis

  • Evaluation of Aerobic and Anaerobic Degradation of Pentachlorophenol in Groundwater (PDF)

    Bench-scale laboratory tests were conducted to evaluate and compare the enhanced bioremediation of pentachlorophenol (PCP) in groundwater under anaerobic and aerobic conditions. While tests under both conditions showed a significant reduction of PCP over the 3-month test period (greater than 90 percent reduction compared to 40 percent in controls), removal to concentrations below the 10 μg/L ...


    By Regenesis

  • 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

  • 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

  • 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

  • JP-4/JP-8 Bioremediation Using ORC® Pumped into Permanent Injection Wells (PDF)

    At Nellis Air Force Base, Nevada, a site investigation revealed that two separate floating product plumes and a larger dissolved plume consisting of JP-4 and JP-8 jet fuel existed. Floating product thicknesses ranged from less than one-half inch to almost three feet. The length of the dissolved plume extended about 700 ...


    By Regenesis

  • Field Demonstration of a Permeable Bioreactive Barrier for Leachate Control.

    ABSTRACT: A biostimulation technique was selected for a pilot study to treat groundwater at a former New Jersey municipal landfill. The process will address a mixture of chlorinated compounds (e.g. vinyl chloride and chlorobenzene), hydrocarbons (e.g. benzene and methyl ethyl ketone) and heavy metals. The reactive barrier will be constructed using a series of injection points to implace a slurry ...


    By Regenesis

  • Successful Application of HRC in a Fractured Formation in Tennessee (PDF)

    Under Tennessee’s Voluntary Cleanup program, a pilot program was successfully implemented using hydrogen-release compound (HRC, Regenesis, Inc.) to address perchloroethene (PCE) and trichloroethene (TCE) contamination in groundwater. Flow direction was known generally, however the fractured nature of the formation precluded specific knowledge of consistent flow across the site. The HRC injection ...


    By Regenesis

  • Application of In Situ Remediation Technologies by Subsurface Injection (PDF)

    There are many emerging remedial technologies which require the introduction of various materials to the saturated zone of a contaminated site in an effort to remediate groundwater in-situ. These remedial materials include both chemical compounds as well as proprietary products such as hydrogen release and oxygen release compounds.A common requirement to implement an effective application of many ...


    By Regenesis

  • Enhanced Aerobic Bioremediation of Petroleum UST Releases in Puerto Rico.

    Abstract: Releases of petroleum compounds from underground storage tanks (USTs) containing diesel fuel and gasoline are a serious and increasingly prevalent problem in Puerto Rico. Remediation of groundwater impacted by these releases utilizing common methodologies can be quite costly and require long periods of time to implement. Oxygen is often the limiting factor retarding optimal ...


    By Regenesis

  • Biodegradation of MTBE Utilizing A Magnesium Peroxide Compound: A Case Study.

    ABSTRACT: A patented magnesium peroxide compound was recently employed at an underground storage tank facility to increase the available oxygen in the groundwater for the biodegradation of fuel hydrocarbons. The objective of this remedial effort was to substantially reduce the dissolved-phase concentrations of BTEX and MTBE and to arrest further migration of the dissolved fuel hydrocarbon plume. ...


    By Regenesis

  • Bioremediation of Nitrochlorobenzene, Nitroaniline, Chloroaniline, and Other Organics in Groundwater.

    ABSTRACT: The uppermost aquifer beneath a chemical plant contains residual concentrations of o-nitrochlorobenzene from a tank car spill, as well as other plant-related organic compounds of concern (COC), including 2-nitroaniline and o-chloroaniline. The aquifer consists of low permeability clays and silts, and produces only a few gallons of groundwater per day from a shallow ...


    By Regenesis

  • Aerobic and Anaerobic Bioremediation of 1,2-Dichloroethene and Vinyl Chloride

    ABSTRACT: This paper presents a comparative study of aerobic and anaerobic bioremediation of 1,2-dichloroethene (DCE) and vinyl chloride (VC), and includes laboratory bench scale testing of anaerobic biodegradation and a side by side field pilot test comparing the effectiveness of aerobic and anaerobic biodegradation processes. Manufacturing activities at an industrial facility in Ohio resulted ...


    By Regenesis

  • Cyanide Spill at Baia Mare - Assessment Mission Report UNEP/OCHA

    Introduction On 30 January 2000, following a breach in the tailing dam of the Aurul SA Baia Mare Company, a major spill of cyanide-rich tailings waste was released into the river system near Baia Mare in north west Romania. The contaminant travelled via tributaries into the river Somes, Tisza and finally into the Danube before reaching the Black Sea. A team of international ...

  • Lessons Learned from a Dual-Phase Extraction Field Application

    ABSTRACT A field-scale Dual-Phase Extraction (DPE) system was installed and operated at the Pinellas Science, Technology, and Research (STAR) Center, formerly the U.S. Department of Energy (DOE) Pinellas Plant, in Largo, Florida, from August 1997 through September 1999. The goal of applying the DPE system was to enhance the pump-and-treat remediation of volatile organic compounds (VOCs) ...


    By Weston Solutions, Inc

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you