well construction Articles

  • The Importance of Dewatering

    With spring comes two things: the onset of construction season for most of our country and rain- lots and lots of rain. The unpredictability of storms and the amount of rainfall is all a guessing game.  Jobsites flood, work stalls and projects get delayed. Rain makes it hard to keep dry and on-schedule. What’s the solution? Dewatering is a technique used to control ...


    By Pac-Van, Inc.

  • Eco Expo Asia 2017 attracts strong participation of international pavilions to exhibit with new theme

    Eco Expo Asia is set to present its 12th edition at AsiaWorld-Expo, Hong Kong, from 26 to 29 October 2017. Organised by Messe Frankfurt (HK) Ltd and the Hong Kong Trade Development Council, and co-organised by the Environment Bureau of the Government of Hong Kong Special Administrative Region, the expo serves as a gateway to the flourishing green ...


    By Messe Frankfurt (HK) Ltd

  • How Do You Choose the Best Reverse Osmosis and Nanofiltration Membrane System for an Industrial Facility?

    As global demands for clean water increase, more and more industrial facilities are looking toward membrane filtration solutions, such as reverse osmosis (RO) and nanofiltration (NF), to help manage intake, process, and waste water treatment. Using membrane filtration can help your facility reuse wastewater and virtually eliminate discharge fees, and depending on the industry or required use, it ...


    By SAMCO Technologies, Inc.

  • Western gateway storage company first to save with Evapcold - Case Study

    The best solution for freezer and cooler applications Western Gateway Project Specifications Equipment: (2) LCR-060P-L20-2H-W Evapcold Units (2) ATWB 9-7K12 Fluid Coolers Capacity: 70 TR per LCR Unit x (2) = 140 TR max capacity Charge: 290 lbs. NH3 per LCR Unit x (2) = 580 lbs. NH3 vs. 3500 lbs. NH3 ...


    By Evapco Inc.

  • University Environmental Health & Safety Departments: Handling Compressed Nitrogen and Cryogenics

    An explosion at a university research lab in Hawaii last year highlights the dangers of working with compressed gas and the need for safety equipment on campus. Learn the dangers of working with compressed gas, how an oxygen deficiency monitor can help, and campus safety best practices.  Compressed Gas on Campus: Uses and Dangers Compressed gases including ...

  • Nonaqueous Phase Liquids Compatibility with Materials Used in Well Construction, Sampling, and Remediation

    The EPA Regional Ground Water Forum is a group of EPA professionals representing Regional Superfund and Resource Conservation and Recovery Act Offices (RCRA), committed to the identification and resolution of ground-water issues impacting the remediation of Superfund and RCRA sites. The Forum is supported by and advises the Superfund Technical Support Project. The compatibility of remediation, ...


    By QED Environmental Systems

  • Escalating well construction costs in South Florida significantly exceed ENR construction cost index

    The South Florida Water Management District (SFWMD) develops long-term, comprehensive regional water supply plans to provide for current and future water use. The use of alternative water supplies is extremely important to the development of future water supply in South Florida. Alternative water supplies include brackish water sources that must be converted to potable water using desalination ...

  • Think health as well as safety

    Lee Calver of Workplace Law writes about how the HSE is making sure that the construction industry ‘thinks health’ as well as safety’. Not many weeks pass without the Health and Safety Executive (HSE) releasing new research or detailing ...


    By Altius Vendor Assessment Ltd

  • Oil and gas well’s fires

    In this paper we will introduce the oil well’s fires and model their modern extinguishing process. The fire mechanism was introduced and its quenching mathematical model was constructed based on the fire thermal parameters. The solution of this program was enhanced with the help of the international MATLAB program and its solution was based on the available international oil fire data. Then the ...


  • Evaluation of a Horizontal Well

    Background: Air Sparging Air sparging is an in-situ remediation technology where air is injected into the saturated zone of an aquifer. It is an alternative to conventional ex-situ pump and treat systems for remediation of contaminated ground water. It is necessary to understand the pattern of air flow that will occur in the subsurface in order to determine the optimal placement, ...

  • 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 ...

  • Abandoning Monitoring Wells: Safety Issues

    Monitoring wells are typically constructed to gauge the extent of contamination, assess water quality and conduct other hydrogeologic studies. Depending on its objective, the monitoring well may remain in use or may be abandoned permanently. When declared inactive, the well is many a times left as it is. Open unused wells are hazardous to life and environment: • Contamination may spread from one ...

  • In-well Vapor Stripping - Technology Overview

    In-well vapor stripping technology involves the creation of a ground-water circulation pattern and simultaneous aeration within the stripping well to volatilize VOCs from the circulating ground-water. Air-lift pumping is used to lift ground-water and strip it of contaminants. Contaminated vapors may be drawn off for aboveground treatment or released to the vadose zone for biodegradation. ...


  • Latin America well-positioned for CDM

    The coastal desert of Colombia’s La Guajira state is a world away from Kyoto, the temperate Japanese city where representatives of 159 countries in 1997 signed the Kyoto Protocol on reducing greenhouses gases. The Caribbean laps against rickety settlements. Herds of goats range across scorching sands. Months, whole years, pass without rain. But Kyoto is well known to the inhabitants of La ...


  • Extraction well design for DNAPL recovery.

    The potential for downward migration of dense nonaqueous phase liquid (DNAPL) into deeper portions of a saturated hydrogeologic unit has important implications for successful groundwater remediation. Little information has been published regarding the design of extraction wells that allow DNAPL recovery without simultaneously creating a conduit for cross contamination by vertical migration ...


    By Hargis + Associates Inc

  • Geotextiles in Construction Dewatering

    Woven geotextiles work wonders in dewatering applications as wraps around well screens and sump pit screens. The textile can be sewn into sleeves or tubes to be slid over the well screen or sump pit framework. This technique allows the user to compensate for well screens with slots that are too large or for sump pit piping with large perforations. By adding the geotextile sleeves the user ...


    By Griffin Dewatering

  • Temporary Construction Dewatering Solutions

    Mention “dewatering” to anyone outside of the underground construction trade, and typically, with a blank stare, they’ll ask what is D-watering? Mention dewatering to anyone in the underground construction trade, and they’ll likely state that it is one of the most important phases in the project, as a well designed and installed dewatering system will allow them to ...


    By Griffin Dewatering

  • Geotech and construction case study

    Pre-Construction Surveys The VIY2-300 GPR was used to survey Korolenko Square and contiguous area in Rivne town from 5 to 6 December 2006. Surveys were carried out both on the lawns and reinforced paving slabs. Large building structures, presumably ruined bridge foundation, are marked in blue. River at this place is no more than 100 years. Large buried ...


    By Transient Technologies LLC

  • Concrete Construction Health Effects

    It’s no secret that working in Concrete Construction is dangerous. The immediate safety hazards are well known. Getting speared or cut on rebar, sore from the hard physical labor; cuts or punctures from nails; and struck by tools, materials or equipment can all cause injuries. Add to that possible falls especially at the leading edge; cuts or shock from powered equipment; burns or explosion ...


    By SafetySmart

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