Well Screens Articles

  • Enhanced Bio-Stimulation through Horizontal Wells

    Biosparging technology can be further enhanced when applied through Horizontal Remediation Wells. Since horizontal well systems typically have 4 to 10 times more screen footage in contact with the contaminated media than vertical systems, Horizontal Biosparge Wells can inject much greater volumes while maintaining the same low flow rates. This, in turn, leads to more rapid increases in dissolved ...

  • 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.

  • A tiered, integrated biological and chemical monitoring framework for contaminants of emerging concern (CECs) in aquatic ecosystems

    The chemical‐specific risk‐based paradigm that informs monitoring and assessment of environmental contaminants does not apply well to the many thousands of new chemicals that are being introduced into ambient receiving waters. We propose a tiered framework that incorporates bioanalytical screening tools and diagnostic non‐targeted chemical analysis to more effectively monitor for contaminants ...


    By John Wiley & Sons, Ltd.

  • 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 ...


  • A Natural Modeling Approach to Pumping Wells in Visual MODFLOW Flex

    The Waterloo Hydrogeologic software development team is constantly making improvements based on the feedback and suggestions from our worldwide users. Recently, our focus has been on redesigning the pumping wells boundary condition in Visual MODFLOW Flex. We chose to emulate the behavior from Visual MODFLOW Classic which provides a natural approach of defining the well discharge rate over the ...

  • 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

  • The Effectiveness of Intrawell ground water monitoring statistics

    Abstract   The reality of the new statistical evaluation requirements for ground water at Subtitle D facilities are being felt nationwide. All too often these requirements are resulting in unnecessary increases in ground water monitoring costs and erroneous indications of facility impacts. For example, a common situation faced by many older facilities is that there is ...


    By Sanitas Technologies

  • 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

  • Storing Heat Underground

    Underground thermal energy storage (UTES) is a system that uses inter-seasonal heat storage, storing excess heat from the summer for use in winter heating, and the cooling potential from winter for cooling in summer. A cost-effective, low-energy and low-risk proven renewable technology, UTES reduces carbon emissions by up to 60% and is becoming an increasingly popular choice for residential, ...


    By Boode Waterwell Systems

  • San Juan Island well production and tank level monitoring case study

    San Juan Island is a popular resort destination whose population fluctuates with the season and the arrival of Orca whales and salmon runs. To get to the island, you must first drive an hour north of Seattle to the city of Anacortes. From there you take a two-hour ferry ride through a 130 island group to arrive at the 20 mile San Juan Island, which is at the waterway entrance to Puget Sound. Bob ...


    By Mission Communications, LLC

  • A New Perspective: a new way to overcome iron bacteria problems has come to America

    Published in the April edition of the Waterwell Journal, this article looks at the problems caused by iron bacteria and iron oxide in wells and boreholes and how Boresaver, a specialist range of cleaning treatments, can solve those problems. Mineral scale and bacterial slime contamination are becoming an increasing problem in groundwater bores in America. Iron bacteria and iron oxide deposits are ...


    By Geoquip Water Solutions

  • 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

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