28 Articles found

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  • Groundwater Contamination Plume Remediation - Case Study

    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 ...

  • Waterloo Emitters used for Bioremediation Study in High Temperature Saline Groundwater

    Waterloo Emitters used for Bioremediation Study in High Temperature Saline Groundwater

    A study was undertaken to determine the success for aerobic bioremediation of aromatic hydrocarbons (BTEX) and MTBE (methyl tert-butyl ether) in high temperature, saline groundwater conditions. The study included laboratory microcosm experiments, as ...

  • High-Resolution Site Characterization with Multilevel Systems

    High-Resolution Site Characterization with Multilevel Systems

    Within the last few years, the U.S. EPA added a new focus area on high-resolution site characterization (HRSC) to their Contaminated Site Clean-Up Information (CLU-IN) website. The U.S. EPA’s definition of HRSC is: “High-resolution ...

  • Levelogger Edge Data Verified in Harsh Conditions of Antarctic Tidal Study

    Levelogger Edge Data Verified in Harsh Conditions of Antarctic Tidal Study

    From April 2013, through December 2013, a Levelogger Edge was used in an Antarctic Tidal Study to monitor sea level fluctuations in the Davis Sea, Antarctica. A unique monitoring setup was implemented for the successful installation of the ...

  • TLC meter “how-to” video: two-point user calibration

    TLC meter “how-to” video: two-point user calibration

    A Solinst TLC Meter measures water level, temperature, and conductivity. To ensure accuracy of readings, the user can easily calibrate the Meter for conductivity, as required. User calibration allows for adjustment of a TLC Meter if the probe has ...

  • Get high quality samples with your drive-point Piezometer

    Get high quality samples with your drive-point Piezometer

    The results from short-term and long-term groundwater monitoring studies have shown that samples taken from Direct Push wells are comparable in quality to those obtained from conventional monitoring wells (ITRC, 2006). Solinst offers the Model 615 ...

  • Isolate & sample up to 7 zones in one borehole

    Isolate & sample up to 7 zones in one borehole

    CMT Multilevel Systems isolate and monitor up to seven discrete zones in one borehole; monitor 7 zones in the 1.7" (43 mm) System; 3 in the narrow 1.1" (28 mm) System. Both options are low cost. The single tube design makes them fast and easy to ...

  • Pump/Recharge Rate Affects Saltwater Intrusion

    Pump/Recharge Rate Affects Saltwater Intrusion

    Untitled Document Many areas of the world use groundwater as their main source of fresh water supply. With the worlds population increasing at alarming rates, the fresh water supply is being continually depleted, increasing the ...

    Jason G. Redwood

  • Multilevel Systems

    Multilevel Systems

    Untitled Document Introduction A multilevel system is a groundwater monitoring device which allows the monitoring of a number of discrete groundwater zones within the subsurface. The system consists of packers and ports which ...

    Kirsten Henderson

  • Design Considerations for Multilevel Monitoring Wells

    Design Considerations for Multilevel Monitoring Wells

    Untitled Document ABSTRACT Much has been written about the advantages of multilevel (multiport) monitoring wells over clustered or nested monitoring wells, however, there is little published information that provides helpful ...

    Linda M. McGlochIin

  • Performance Testing of Conventional and Innovative Downhole Samplers and Pumps for VOC`s in a Laboratory Monitoring Well

    Performance Testing of Conventional and Innovative Downhole Samplers and Pumps for VOC`s in a Laboratory Monitoring Well

    Untitled Document ABSTRACT Concentrations of groundwater contaminants in samples that differ from concentrations in the aquifer can lead to incorrect conclusions about the extent and severity of contamination and the ...

    D.F. Baerg R.C. Starr J.A. Cherry D.J.A. Smyth

  • Advances in Multilevel Well Technology

    Advances in Multilevel Well Technology

    Several detailed field studies performed at research sites in the 1980’s and 1990’s suggest that most contaminant plumes exhibit large variations in concentration over small vertical distances. These variations are caused by spatial variations in ...

  • Groundwater Remediation Strategies Tool

    Groundwater Remediation Strategies Tool

    This guide provides strategies for focusing remediation efforts on 1) the change in contaminant mass flux in different subsurface transport compartments (e.g. the vadose zone, smear zone or a zone within an aquifer of interest) and 2) the change ...

    Charles J. Newell, John A. Conner, Dana L. Rowen,

  • A New Multilevel Ground Water Monitoring System Using Multichannel Tubing

    A New Multilevel Ground Water Monitoring System Using Multichannel Tubing

    A new multilevel ground water monitoring system has been developed that uses custom-extruded flexible 1.6-inch (4.1 cm) outside-diameter (O.D.) multichannel HDPE tubing (referred to as Continuous Multichannel Tubing™ or CMT) to monitor as many as ...

    Murray D. Einarson and John A. Cherry

  • Site Characterisation in Support of Monitored Natural Attenuation of Fuel Hydrocarbons and MTBE in a Chalk Aquifer in Southern England

    Site Characterisation in Support of Monitored Natural Attenuation of Fuel Hydrocarbons and MTBE in a Chalk Aquifer in Southern England

    This Case Study Bulletin describes a research project, which was carried out to determine whether monitored natural attenuation was a viable option for managing fuel hydrocarbon contamination in a chalk aquifer in southern England. The research, ...

    Dr Steve Thornton

  • Technical Bulletin: Multilevel Sampling

    Technical Bulletin: Multilevel Sampling

    The topic of this CL:AIRE Technical Bulletin is multilevel sampling systems for characterising contaminated groundwater. Contaminated groundwater can present considerable problems for landowners: it can occur at significant depth, sources of the ...

    Peter Dumble

  • Installing Continuous Multi-Chamber Tubing Using Sonic Drilling

    Installing Continuous Multi-Chamber Tubing Using Sonic Drilling

    As a geologist, core is the first thing that comes to mind when talking about sonic drilling— continuous, near complete core recovery through almost any lithology. Sand to silt transitions can be logged on a centimeter scale if desired. ...

    Michael Lewis, R.G.

  • Estimating Future Impacts of Groundwater Contamination on Water Supply Wells

    Estimating Future Impacts of Groundwater Contamination on Water Supply Wells

    In the following sections, we provide discussion and information to supplement the Feature Article. This material could not be included in the article itself due to space limitations of the printed version.

    Murray D. Einarson and Douglas M. Mackay

  • Implications of observed and simulated ambient flow in monitoring wells

    Implications of observed and simulated ambient flow in monitoring wells

    The authors of this paper present compelling evidence that conventional monitoring wells act as vertical conduits whenever vertical hydraulic gradients are present (i.e., at most sites). Vertical flow within wells due to natural hydraulic gradients ...

    Alper Elci, Fred J. Molz & William R. Waldrop

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

    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 ...

    Carole D. Johnson, F.P. Haeni, and John W. Lane, Jr.