Well Screens Articles

  • 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 ...

  • Horizontal Soil Vapor Extraction Wells

    As part of a Corrective Action Plan (CAP) submitted to NYSDEC, a consultant selected Horizontal Soil Vapor Extraction Wells (HSVE) to expand an on-site vapor extraction system in New York. Directional Technologies worked with the consultant on the horizontal well screen design and well layout of three (3) HSVE wells, spaced 50-feet apart, and constructed with 4-inch Schedule 80 PVC materials. Due ...

  • When It Comes to Screening Media, Quality Matters

    In precise industrial processes, all equipment and constituent parts must work together to drive performance and efficiency. For screening and sifting materials in the pharmaceutical, chemical, aggregate and other industries, your choice of media goes a long way toward determining the effectiveness of your machines. Even the best vibratory sifters are only ...


    By VibraScreener Inc.

  • Good Risk Prioritization Puts City Of Saskatoon On Top Of Its Game

    While pipeline management may seem unaffordable, understanding the condition and targeting repair provides an alternate approach to wholesale replacement and allows operators to accomplish the same de-risking effort with less money. The City of Saskatoon operates more than ...


    By Pure Technologies

  • Endocrine Disruptors

    Overview: Substances that mimic, influence, or interfere with the body's endocrine system at certain doses, and produce potentially adverse developmental, reproductive, neurological, and/or immune effects in both humans and wildlife, are called endocrine disruptors. These substances can be naturally-occurring or man-made. Endocrine issues have long been the subject of intense ...


    By Bergeson & Campbell, P.C.

  • Less Reactive, More Proactive

    OPERATORS EMBRACE INLINE TECHNOLOGIES TO ASSESS THEIR METALLIC FORCE MAINS Historically, it has proven difficult to assess the condition of pressurized mains that carry sewage, especially those made with ferrous material. Metallic force mains have special operational challenges that ...


    By Pure Technologies

  • Case Study - Multilevel well system improved understanding of groundwater conditions in deep aquifers

    Westbay System delivered detailed data in less time and at a reduced cost CHALLENGE Characterizing the plume in a shallow  aquifer is simple, but investigating deeper  aquifers poses several challenges. SOLUTION MACTEC evaluated various monitoring  technologies and determined that  Westbay System modular ...


  • Turning metal wires from pulp bales into profit with TANA Shark

    Metal wires from paper pulp bales are high in value but very hard to shred and clean for selling purposes. Usually the metal wires are stuck with plastics and some remains of the pulping process. This particular type of waste is almost impossible to separate, says a landfill operator in France. Normally the only possibility to handle this type of waste is to dump it at a landfill. This is due ...


    By Tana Oy

  • Selection of monitoring locations for storm water quality assessment

    Storm water runoff is a major contributor to the pollution of receiving waters. Storm water characteristics may vary significantly between locations and events. Hence, for each given location, this necessitates a well-designed monitoring campaign prior to selection of an appropriate storm water management strategy. The challenge for the design of a monitoring campaign with a given budget is to ...


    By IWA Publishing

  • Enabling Clean Water for 25 years

    Water-well drilling equipment company Boode has been active in groundwater abstraction since 1897, later focusing on supplying PVC well casings and screen systems. Its UK concern, established by Stan and Scott Dronsfield, celebrates 25 years in business this year. Stan Dronsfield still remembers the early days back in 1989 when they operated from a wooden shed in their garden, ...


    By Boode Waterwell Systems

  • The Future of Drinking Water

    Predicted future growth in population numbers and rising sea levels mean demand for drinking water will continue to increase just as the natural availability of freshwater decreases. It is likely that brackish groundwater will be an important source of drinking water in the future, but the current methods used to produce fresh water from this source are expensive in terms of their energy use and ...


    By Boode Waterwell Systems

  • Modeling of radial well lateral screens using 1D finite elements

    A water supply system including radial wells (RWs) is usually large, extending several tens of kilometers horizontally and is dozens of meters deep. An RW is a vertical shaft with lateral screens, which radially penetrate the soil. A large and complex 3D finite element (FE) mesh also needs to include laterals with cross-sectional dimensions measured in centimeters. An adequate representation of ...


    By IWA Publishing

  • Several natural indicators of radial well ageing at the Belgrade Groundwater Source, part 2

    From 2005 to 2009, research was conducted at the Belgrade Groundwater Source (BGWS) to investigate the process of clogging of wells with horizontal lateral screens (radial wells). The clogging process was monitored via the kinetics of the increase in hydraulic losses at the laterals. A correlation of this process with the redox potential, the iron concentration in water, and the microbial ...


    By IWA Publishing

  • A method for reducing purge volumes in deep monitoring wells: a purging experiment.

    Regulatory agencies often require three well casing volumes or more be purged prior to collection of groundwater samples for chemical analysis. Costs are high for testing and disposing of potentially hazardous purge water; therefore, efforts must be made to minimize waste-water volume while obtaining representative groundwater samples. Lockheed sponsored a purge experiment on two deep monitor ...


    By Hargis + Associates Inc

  • 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 not only makes it impossible to accurately define the vertical distribution of dissolved contaminants within the aquifer, but it can transport ...


    By Solinst Canada Ltd.

  • 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

  • Operator Strategies : Sorting Out the Plastic

    BETTER BUGS Ideas and products in the Better Bugs category attempt to affect the biological components and biochemistry of processes by altering the mix of microorganisms or enzymes present. After all, biology is the foundation of many, if not most, organics recycling systems. Pyrophiles: The first example of Better Bugs involves pyrophilic organisms, bugs that can take the heat. This example is ...


    By BioCycle Magazine

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