well investigation Articles

  • NTSB Investigates

    An independent U.S. government agency uses everything at its disposal, including ASTM standards, to determine the causes of transportation and pipeline accidents. An airplane battery catches on fire. A gas pipeline explodes. A bridge collapses. When incidents like ...


    By ASTM International

  • Band structure investigation of strained Si1-xGex/Si coupled quantum wells

    The band structure of Si1-xGex/Si coupled quantum wells (CQW) was calculated with the 8-band k p method. Both strain and spin-orbit split-off band effect were taken into account. The subband energy of the Si0.6Ge0.4/Si quantum well as a function of barrier width and well width was calculated. Barrier width varies between 20~60 while well width varies between 30~110 . Finally, the relationship ...


    By Inderscience Publishers

  • Hydrochemical investigation of water from the Pleistocene wells and springs, Jericho area, Palestine

    Rising salinity levels is one of the significant signs of water-quality degradation in groundwater. The alluvial Pleistocene wells in the Jericho area, Palestine show high salinity and a high susceptibility to contamination. Future exploitation and management of the water resources under these conditions will require an in-depth understanding of the sources and mechanisms of contamination. The ...


    By Springer

  • Investigating cross-contamination of aquifers

    Shallow aquifers can cross-contaminate deeper aquifers through penetration of an intervening aquitard, via sandy intervals in the aquitard, along well casings, across long well screens, or around aquitard pinchouts. Distinguishing among these potential pathways requires the use of evaluation tools that may support or eliminate certain pathways. These tools include groundwater gradient and ...


    By Springer

  • Manufactured gas plant investigation

    A two-person BEACON field team installed 304 PSG Samplers over a two-day period. Samplers were installed through soils, gravel, asphalt, and concrete. To accommodate field schedules, the Samplers were exposed for eight days in the field and the two-person field team required one day for retrieval of the Samplers. Survey results clearly showed where source areas are present on the site, as well as ...

  • Vapor intrusion pathway investigation

    The BEACON samplers defined the vapor intrusion of tetrachloroethene and 1,1-dichloroethene, while the Summa canisters (EPA Method TO-15) reported all non-detects. The BEACON survey enabled detection of some chemicals at levels below the Summa canisters practical quantitation limits providing a more complete and realistic vapor intrusion exposure pathway evaluation. Based on the defined vapor ...

  • An investigation on physical, chemical, and bacteriological quality of municipally supplied and well waters of the towns and city centre in the province of Nigde, Turkey

    Physical, chemical, and bacteriological properties of municipally supplied water and well water in selected towns and the city centre (Ni de, population 76,000) of the province of Ni de, located in central Anatolia, in Turkey, were investigated in this study. A composition of 70 samples were collected, 31 from Ni de city centre; 17 from Bor; 8 from Ulukı la; 6 from Altunhisar; 6 from  ...


    By Nigde University

  • Investigation of shell aggregate gold nanostructures

    The unique optical properties of noble metal nanostructures have led to an increased interest into their potential uses for various biological applications. For many medical investigations, it would be beneficial to use near infrared (NIR) excitation as well as small gold nanospheres, which can easily reach the cytoplasm and cell nucleus. To fulfil both requirements simultaneously, this paper ...


    By Inderscience Publishers

  • An investigation and remediation of TNT contaminated soils.

    An investigation and remediation of TNT contaminated soils and wastes was conducted at the Apache Powder Superfund Site in Cochise County, Arizona during 1999 and 2000. TNT contamination was most likely the result of salvage operations of World War I munitions. Characterized by a steep hillside and arroyo cutting through the wastes, the site offered challenges of stability, access, health and ...


    By Hargis + Associates Inc

  • Ocean acidification investigations in the Kiel Fjord

    Continuous, reliableand direct pCO2measurements since 2012 Greenhouse gases, and in particular carbon dioxide (CO2), are one of the most discussed topics in society today, influencing political debate, legal framework and business decision-making. From a pre-industrial 280ppm, atmospheric CO2 has risen to a present-day level of 390ppm, with this figure expected to rise to up to 1000ppm by the ...


    By Teledyne RD Instruments

  • An investigation of e-business risks in UK SMEs

    Electronic business is a phenomenon that is now well defined and has emerged as a field of study. In parallel, businesses are increasingly embedding technology into their business processes and seeking to exploit the potential efficiency and effectiveness gains that can occur. As such, industry and academic attention has spawned a range of research interests and resulted in proposals of how ...


    By Inderscience Publishers

  • Train derailment prompts contaminated land investigation

    On March 30th 2015 a long freight train, transporting a variety of goods including lumber and chemicals, wound its way through the state of Mississippi. At around 5pm, part of the train failed to negotiate a curved portion of the track in a rural area near Minter City, resulting in the derailment of nine railcars, one of which leaked chemicals onto agricultural farmland and woodlands. Emergency ...


    By Gasmet Technologies Oy

  • Researchers investigate wastewater reuse in Namibian town

    A multi-year project in Namibia, headed by scientists from the Technische Universität Darmstadt, is looking for the best way to upgrade wastewater stabilization pond systems so the water can be reused to irrigate animal fodder crops. Despite its simple aim, the project has the lengthy name of “EPoNa-upgrading wastewater ponds to generate irrigation water, using the Cuvelai-Etosha ...


    By Fluence Corporation

  • Washington Watch -- The Chemical Safety and Hazard Investigation Board: Thinking Strategically in Investigating (and Preventing) Chemical Accidents

    (From the Winter 2006 issue of Environmental Quality Management) Chemical accidents are always unwanted, and almost always the subject of considerable media attention and public scrutiny. Investigating the causes of chemical accidents is not an easy task, nor is the job of communicating the results of such investigations. Given the significant importance of the mission and day-to-day work of the ...


    By Bergeson & Campbell, P.C.

  • Locate buried monitoring wells case study

    A Phase II Environmental Site Investigation was being conducted at a gasoline station in Fort Myers, Florida. In order to minimize costs, our client intended to use several existing on-site monitoring wells rather than installing new wells. However, five of the existing wells had been covered with asphalt and were no longer visible. GeoView was tasked with performing a shallow geophysical study ...


    By GeoView, Inc.

  • Non-intrusive site investigation (UXO, CWM concerns)

    BEACON personnel used global positioning system (GPS) equipment to map out site locations. The soil-gas data clearly identified source areas of Trichloroethene (TCE) as well as other compounds of concern. The results showed the location of chlorinated contamination, which correlated well with data from a geophysical survey. While the flux chambers were in the field, more than nine inches of rain ...

  • Pilot-scale study investigating RO/NF performance

    High-pressure membrane technologies, especially reverses osmosis, have been widely used in indirect potable water reuse projects due to their high removal efficiency for unregulated and unidentified organics, as well as nutrients and bulk organic carbon (Drewes et al., 2003). Recent developments in membrane manufacturing have resulted in 'lower pressure' membranes such as ultra-low pressure ...


    By Toray Chemical Korea

  • Analytical investigation of an on-road in-pit heavy traffic situation

    The paper considers the problem of an on-road in-pit heavy traffic situation that might occur during the operation of a shovel-truck system. During their travel, trucks encounter other pieces of haulage frequently that can affect the truck's performance. It is a well-known fact that by increasing the number of trucks in the system, the productivity of the truck system grows. However, this only ...


    By Inderscience Publishers

  • TQM implementation barriers in academe: a framework for further investigation

    Many academics and practitioners believe that Total Quality Management philosophy is the panacea of the 1990s for many industries in all segments of the economy, including education. Many others have argued that TQM is a fad, and like many of its predecessors, such as Management By Objectives (MBO), is going to fade away. Existing cases of successful implementation of TQM in business enterprises, ...


    By Inderscience Publishers

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